reflectivity of infrared or ultrasound emitted.
Often these sensors are unit less and as such conversion
to SI units is not possible. Higher proximity measurements
- indicate closer objects, and vice versa.
+ indicate closer objects, and vice versa. Units after
+ application of scale and offset are meters.
What: /sys/.../iio:deviceX/in_illuminance_input
What: /sys/.../iio:deviceX/in_illuminance_raw
--- /dev/null
+* Maxim max11100 Analog to Digital Converter (ADC)
+
+Required properties:
+ - compatible: Should be "maxim,max11100"
+ - reg: the adc unit address
+ - vref-supply: phandle to the regulator that provides reference voltage
+
+Optional properties:
+ - spi-max-frequency: SPI maximum frequency
+
+Example:
+
+max11100: adc@0 {
+ compatible = "maxim,max11100";
+ reg = <0>;
+ vref-supply = <&adc0_vref>;
+ spi-max-frequency = <240000>;
+};
--- /dev/null
+* Texas Instruments ADS7950 family of A/DC chips
+
+Required properties:
+ - compatible: Must be one of "ti,ads7950", "ti,ads7951", "ti,ads7952",
+ "ti,ads7953", "ti,ads7954", "ti,ads7955", "ti,ads7956", "ti,ads7957",
+ "ti,ads7958", "ti,ads7959", "ti,ads7960", or "ti,ads7961"
+ - reg: SPI chip select number for the device
+ - #io-channel-cells: Must be 1 as per ../iio-bindings.txt
+ - vref-supply: phandle to a regulator node that supplies the 2.5V or 5V
+ reference voltage
+
+Recommended properties:
+ - spi-max-frequency: Definition as per
+ Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Example:
+adc@0 {
+ compatible = "ti,ads7957";
+ reg = <0>;
+ #io-channel-cells = <1>;
+ vref-supply = <&refin_supply>;
+ spi-max-frequency = <10000000>;
+};
--- /dev/null
+* ST_LSM6DSx driver for STM 6-axis (acc + gyro) imu Mems sensors
+
+Required properties:
+- compatible: must be one of:
+ "st,lsm6ds3"
+ "st,lsm6dsm"
+- reg: i2c address of the sensor / spi cs line
+
+Optional properties:
+- interrupt-parent: should be the phandle for the interrupt controller
+- interrupts: interrupt mapping for IRQ. It should be configured with
+ flags IRQ_TYPE_LEVEL_HIGH or IRQ_TYPE_EDGE_RISING.
+
+ Refer to interrupt-controller/interrupts.txt for generic interrupt
+ client node bindings.
+
+Example:
+
+lsm6dsm@6b {
+ compatible = "st,lsm6dsm";
+ reg = <0x6b>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <0 IRQ_TYPE_EDGE_RISING>;
+};
--- /dev/null
+* TI TMP007 - IR thermopile sensor with integrated math engine
+
+Link to datasheet: http://www.ti.com/lit/ds/symlink/tmp007.pdf
+
+Required properties:
+
+ - compatible: should be "ti,tmp007"
+ - reg: the I2C address of the sensor (changeable via ADR pins)
+ ------------------------------
+ |ADR1 | ADR0 | Device Address|
+ ------------------------------
+ 0 0 0x40
+ 0 1 0x41
+ 0 SDA 0x42
+ 0 SCL 0x43
+ 1 0 0x44
+ 1 1 0x45
+ 1 SDA 0x46
+ 1 SCL 0x47
+
+Example:
+
+tmp007@40 {
+ compatible = "ti,tmp007";
+ reg = <0x40>;
+};
+
To compile this driver as a module, choose M here: the module will be
called max1027.
+config MAX11100
+ tristate "Maxim max11100 ADC driver"
+ depends on SPI_MASTER
+ help
+ Say yes here to build support for Maxim max11100 SPI ADC
+
+ To compile this driver as a module, choose M here: the module will be
+ called max11100.
+
config MAX1363
tristate "Maxim max1363 ADC driver"
depends on I2C
To compile this driver as a module, choose M here: the module will be
called ti_am335x_adc.
+config TI_TLC4541
+ tristate "Texas Instruments TLC4541 ADC driver"
+ depends on SPI
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say yes here to build support for Texas Instruments TLC4541 / TLC3541
+ ADC chips.
+
+ This driver can also be built as a module. If so, the module will be
+ called ti-tlc4541.
+
config TWL4030_MADC
tristate "TWL4030 MADC (Monitoring A/D Converter)"
depends on TWL4030_CORE
obj-$(CONFIG_LPC18XX_ADC) += lpc18xx_adc.o
obj-$(CONFIG_LTC2485) += ltc2485.o
obj-$(CONFIG_MAX1027) += max1027.o
+obj-$(CONFIG_MAX11100) += max11100.o
obj-$(CONFIG_MAX1363) += max1363.o
obj-$(CONFIG_MCP320X) += mcp320x.o
obj-$(CONFIG_MCP3422) += mcp3422.o
obj-$(CONFIG_TI_ADS7950) += ti-ads7950.o
obj-$(CONFIG_TI_ADS8688) += ti-ads8688.o
obj-$(CONFIG_TI_AM335X_ADC) += ti_am335x_adc.o
+obj-$(CONFIG_TI_TLC4541) += ti-tlc4541.o
obj-$(CONFIG_TWL4030_MADC) += twl4030-madc.o
obj-$(CONFIG_TWL6030_GPADC) += twl6030-gpadc.o
obj-$(CONFIG_VF610_ADC) += vf610_adc.o
--- /dev/null
+/*
+ * iio/adc/max11100.c
+ * Maxim max11100 ADC Driver with IIO interface
+ *
+ * Copyright (C) 2016-17 Renesas Electronics Corporation
+ * Copyright (C) 2016-17 Jacopo Mondi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/driver.h>
+
+/*
+ * LSB is the ADC single digital step
+ * 1 LSB = (vref_mv / 2 ^ 16)
+ *
+ * LSB is used to calculate analog voltage value
+ * from the number of ADC steps count
+ *
+ * Ain = (count * LSB)
+ */
+#define MAX11100_LSB_DIV (1 << 16)
+
+struct max11100_state {
+ struct regulator *vref_reg;
+ struct spi_device *spi;
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ u8 buffer[3] ____cacheline_aligned;
+};
+
+static struct iio_chan_spec max11100_channels[] = {
+ { /* [0] */
+ .type = IIO_VOLTAGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+};
+
+static int max11100_read_single(struct iio_dev *indio_dev, int *val)
+{
+ int ret;
+ struct max11100_state *state = iio_priv(indio_dev);
+
+ ret = spi_read(state->spi, state->buffer, sizeof(state->buffer));
+ if (ret) {
+ dev_err(&indio_dev->dev, "SPI transfer failed\n");
+ return ret;
+ }
+
+ /* the first 8 bits sent out from ADC must be 0s */
+ if (state->buffer[0]) {
+ dev_err(&indio_dev->dev, "Invalid value: buffer[0] != 0\n");
+ return -EINVAL;
+ }
+
+ *val = (state->buffer[1] << 8) | state->buffer[2];
+
+ return 0;
+}
+
+static int max11100_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long info)
+{
+ int ret, vref_uv;
+ struct max11100_state *state = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ ret = max11100_read_single(indio_dev, val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ vref_uv = regulator_get_voltage(state->vref_reg);
+ if (vref_uv < 0)
+ /* dummy regulator "get_voltage" returns -EINVAL */
+ return -EINVAL;
+
+ *val = vref_uv / 1000;
+ *val2 = MAX11100_LSB_DIV;
+ return IIO_VAL_FRACTIONAL;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_info max11100_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = max11100_read_raw,
+};
+
+static int max11100_probe(struct spi_device *spi)
+{
+ int ret;
+ struct iio_dev *indio_dev;
+ struct max11100_state *state;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*state));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, indio_dev);
+
+ state = iio_priv(indio_dev);
+ state->spi = spi;
+
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->dev.of_node = spi->dev.of_node;
+ indio_dev->name = "max11100";
+ indio_dev->info = &max11100_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = max11100_channels,
+ indio_dev->num_channels = ARRAY_SIZE(max11100_channels),
+
+ state->vref_reg = devm_regulator_get(&spi->dev, "vref");
+ if (IS_ERR(state->vref_reg))
+ return PTR_ERR(state->vref_reg);
+
+ ret = regulator_enable(state->vref_reg);
+ if (ret)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto disable_regulator;
+
+ return 0;
+
+disable_regulator:
+ regulator_disable(state->vref_reg);
+
+ return ret;
+}
+
+static int max11100_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct max11100_state *state = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ regulator_disable(state->vref_reg);
+
+ return 0;
+}
+
+static const struct of_device_id max11100_ids[] = {
+ {.compatible = "maxim,max11100"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, max11100_ids);
+
+static struct spi_driver max11100_driver = {
+ .driver = {
+ .name = "max11100",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(max11100_ids),
+ },
+ .probe = max11100_probe,
+ .remove = max11100_remove,
+};
+
+module_spi_driver(max11100_driver);
+
+MODULE_AUTHOR("Jacopo Mondi <jacopo@jmondi.org>");
+MODULE_DESCRIPTION("Maxim max11100 ADC Driver");
+MODULE_LICENSE("GPL v2");
MAX1363_COMPATIBLE("maxim,max11647", max11647),
{ /* sentinel */ }
};
+MODULE_DEVICE_TABLE(of, max1363_of_match);
#endif
static int max1363_probe(struct i2c_client *client,
.attrs = ads1115_attributes,
};
-static struct iio_info ads1015_info = {
+static const struct iio_info ads1015_info = {
.driver_module = THIS_MODULE,
.read_raw = ads1015_read_raw,
.write_raw = ads1015_write_raw,
.attrs = &ads1015_attribute_group,
};
-static struct iio_info ads1115_info = {
+static const struct iio_info ads1115_info = {
.driver_module = THIS_MODULE,
.read_raw = ads1015_read_raw,
.write_raw = ads1015_write_raw,
spi_message_init_with_transfers(&st->scan_single_msg,
st->scan_single_xfer, 3);
- st->reg = devm_regulator_get(&spi->dev, "refin");
+ st->reg = devm_regulator_get(&spi->dev, "vref");
if (IS_ERR(st->reg)) {
- dev_err(&spi->dev, "Failed get get regulator \"refin\"\n");
+ dev_err(&spi->dev, "Failed get get regulator \"vref\"\n");
return PTR_ERR(st->reg);
}
ret = regulator_enable(st->reg);
if (ret) {
- dev_err(&spi->dev, "Failed to enable regulator \"refin\"\n");
+ dev_err(&spi->dev, "Failed to enable regulator \"vref\"\n");
return ret;
}
}
static const struct spi_device_id ti_ads7950_id[] = {
- {"ti-ads7950", TI_ADS7950},
- {"ti-ads7951", TI_ADS7951},
- {"ti-ads7952", TI_ADS7952},
- {"ti-ads7953", TI_ADS7953},
- {"ti-ads7954", TI_ADS7954},
- {"ti-ads7955", TI_ADS7955},
- {"ti-ads7956", TI_ADS7956},
- {"ti-ads7957", TI_ADS7957},
- {"ti-ads7958", TI_ADS7958},
- {"ti-ads7959", TI_ADS7959},
- {"ti-ads7960", TI_ADS7960},
- {"ti-ads7961", TI_ADS7961},
+ { "ads7950", TI_ADS7950 },
+ { "ads7951", TI_ADS7951 },
+ { "ads7952", TI_ADS7952 },
+ { "ads7953", TI_ADS7953 },
+ { "ads7954", TI_ADS7954 },
+ { "ads7955", TI_ADS7955 },
+ { "ads7956", TI_ADS7956 },
+ { "ads7957", TI_ADS7957 },
+ { "ads7958", TI_ADS7958 },
+ { "ads7959", TI_ADS7959 },
+ { "ads7960", TI_ADS7960 },
+ { "ads7961", TI_ADS7961 },
{ }
};
MODULE_DEVICE_TABLE(spi, ti_ads7950_id);
static struct spi_driver ti_ads7950_driver = {
.driver = {
- .name = "ti-ads7950",
+ .name = "ads7950",
},
.probe = ti_ads7950_probe,
.remove = ti_ads7950_remove,
--- /dev/null
+/*
+ * TI tlc4541 ADC Driver
+ *
+ * Copyright (C) 2017 Phil Reid
+ *
+ * Datasheets can be found here:
+ * http://www.ti.com/lit/gpn/tlc3541
+ * http://www.ti.com/lit/gpn/tlc4541
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The tlc4541 requires 24 clock cycles to start a transfer.
+ * Conversion then takes 2.94us to complete before data is ready
+ * Data is returned MSB first.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/sysfs.h>
+
+struct tlc4541_state {
+ struct spi_device *spi;
+ struct regulator *reg;
+ struct spi_transfer scan_single_xfer[3];
+ struct spi_message scan_single_msg;
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ * 2 bytes data + 6 bytes padding + 8 bytes timestamp when
+ * call iio_push_to_buffers_with_timestamp.
+ */
+ __be16 rx_buf[8] ____cacheline_aligned;
+};
+
+struct tlc4541_chip_info {
+ const struct iio_chan_spec *channels;
+ unsigned int num_channels;
+};
+
+enum tlc4541_id {
+ TLC3541,
+ TLC4541,
+};
+
+#define TLC4541_V_CHAN(bits, bitshift) { \
+ .type = IIO_VOLTAGE, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = (bitshift), \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+#define DECLARE_TLC4541_CHANNELS(name, bits, bitshift) \
+const struct iio_chan_spec name ## _channels[] = { \
+ TLC4541_V_CHAN(bits, bitshift), \
+ IIO_CHAN_SOFT_TIMESTAMP(1), \
+}
+
+static DECLARE_TLC4541_CHANNELS(tlc3541, 14, 2);
+static DECLARE_TLC4541_CHANNELS(tlc4541, 16, 0);
+
+static const struct tlc4541_chip_info tlc4541_chip_info[] = {
+ [TLC3541] = {
+ .channels = tlc3541_channels,
+ .num_channels = ARRAY_SIZE(tlc3541_channels),
+ },
+ [TLC4541] = {
+ .channels = tlc4541_channels,
+ .num_channels = ARRAY_SIZE(tlc4541_channels),
+ },
+};
+
+static irqreturn_t tlc4541_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct tlc4541_state *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = spi_sync(st->spi, &st->scan_single_msg);
+ if (ret < 0)
+ goto done;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
+ iio_get_time_ns(indio_dev));
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+static int tlc4541_get_range(struct tlc4541_state *st)
+{
+ int vref;
+
+ vref = regulator_get_voltage(st->reg);
+ if (vref < 0)
+ return vref;
+
+ vref /= 1000;
+
+ return vref;
+}
+
+static int tlc4541_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
+{
+ int ret = 0;
+ struct tlc4541_state *st = iio_priv(indio_dev);
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = spi_sync(st->spi, &st->scan_single_msg);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+ *val = be16_to_cpu(st->rx_buf[0]);
+ *val = *val >> chan->scan_type.shift;
+ *val &= GENMASK(chan->scan_type.realbits - 1, 0);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = tlc4541_get_range(st);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ *val2 = chan->scan_type.realbits;
+ return IIO_VAL_FRACTIONAL_LOG2;
+ }
+ return -EINVAL;
+}
+
+static const struct iio_info tlc4541_info = {
+ .read_raw = &tlc4541_read_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static int tlc4541_probe(struct spi_device *spi)
+{
+ struct tlc4541_state *st;
+ struct iio_dev *indio_dev;
+ const struct tlc4541_chip_info *info;
+ int ret;
+ int8_t device_init = 0;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+
+ spi_set_drvdata(spi, indio_dev);
+
+ st->spi = spi;
+
+ info = &tlc4541_chip_info[spi_get_device_id(spi)->driver_data];
+
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = info->channels;
+ indio_dev->num_channels = info->num_channels;
+ indio_dev->info = &tlc4541_info;
+
+ /* perform reset */
+ spi_write(spi, &device_init, 1);
+
+ /* Setup default message */
+ st->scan_single_xfer[0].rx_buf = &st->rx_buf[0];
+ st->scan_single_xfer[0].len = 3;
+ st->scan_single_xfer[1].delay_usecs = 3;
+ st->scan_single_xfer[2].rx_buf = &st->rx_buf[0];
+ st->scan_single_xfer[2].len = 2;
+
+ spi_message_init_with_transfers(&st->scan_single_msg,
+ st->scan_single_xfer, 3);
+
+ st->reg = devm_regulator_get(&spi->dev, "vref");
+ if (IS_ERR(st->reg))
+ return PTR_ERR(st->reg);
+
+ ret = regulator_enable(st->reg);
+ if (ret)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ &tlc4541_trigger_handler, NULL);
+ if (ret)
+ goto error_disable_reg;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_cleanup_buffer;
+
+ return 0;
+
+error_cleanup_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_disable_reg:
+ regulator_disable(st->reg);
+
+ return ret;
+}
+
+static int tlc4541_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct tlc4541_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ regulator_disable(st->reg);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id tlc4541_dt_ids[] = {
+ { .compatible = "ti,tlc3541", },
+ { .compatible = "ti,tlc4541", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, tlc4541_dt_ids);
+#endif
+
+static const struct spi_device_id tlc4541_id[] = {
+ {"tlc3541", TLC3541},
+ {"tlc4541", TLC4541},
+ {}
+};
+MODULE_DEVICE_TABLE(spi, tlc4541_id);
+
+static struct spi_driver tlc4541_driver = {
+ .driver = {
+ .name = "tlc4541",
+ .of_match_table = of_match_ptr(tlc4541_dt_ids),
+ },
+ .probe = tlc4541_probe,
+ .remove = tlc4541_remove,
+ .id_table = tlc4541_id,
+};
+module_spi_driver(tlc4541_driver);
+
+MODULE_AUTHOR("Phil Reid <preid@electromag.com.au>");
+MODULE_DESCRIPTION("Texas Instruments TLC4541 ADC");
+MODULE_LICENSE("GPL v2");
if (ret)
return ret;
- usleep_range(35000, 50000);
+ msleep(35);
return max30100_read_temp(data, val);
}
be called kmx61.
source "drivers/iio/imu/inv_mpu6050/Kconfig"
+source "drivers/iio/imu/st_lsm6dsx/Kconfig"
endmenu
obj-y += inv_mpu6050/
obj-$(CONFIG_KMX61) += kmx61.o
+
+obj-y += st_lsm6dsx/
__le16 sample;
enum bmi160_sensor_type t = bmi160_to_sensor(chan_type);
- reg = bmi160_regs[t].data + (axis - IIO_MOD_X) * sizeof(__le16);
+ reg = bmi160_regs[t].data + (axis - IIO_MOD_X) * sizeof(sample);
- ret = regmap_bulk_read(data->regmap, reg, &sample, sizeof(__le16));
+ ret = regmap_bulk_read(data->regmap, reg, &sample, sizeof(sample));
if (ret < 0)
return ret;
for_each_set_bit(i, indio_dev->active_scan_mask,
indio_dev->masklength) {
- ret = regmap_bulk_read(data->regmap, base + i * sizeof(__le16),
- &sample, sizeof(__le16));
+ ret = regmap_bulk_read(data->regmap, base + i * sizeof(sample),
+ &sample, sizeof(sample));
if (ret < 0)
goto done;
buf[j++] = sample;
--- /dev/null
+
+config IIO_ST_LSM6DSX
+ tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
+ depends on (I2C || SPI)
+ select IIO_BUFFER
+ select IIO_KFIFO_BUF
+ select IIO_ST_LSM6DSX_I2C if (I2C)
+ select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
+ help
+ Say yes here to build support for STMicroelectronics LSM6DSx imu
+ sensor. Supported devices: lsm6ds3, lsm6dsm
+
+ To compile this driver as a module, choose M here: the module
+ will be called st_lsm6dsx.
+
+config IIO_ST_LSM6DSX_I2C
+ tristate
+ depends on IIO_ST_LSM6DSX
+
+config IIO_ST_LSM6DSX_SPI
+ tristate
+ depends on IIO_ST_LSM6DSX
--- /dev/null
+st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o
+
+obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
+obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
+obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
--- /dev/null
+/*
+ * STMicroelectronics st_lsm6dsx sensor driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_LSM6DSX_H
+#define ST_LSM6DSX_H
+
+#include <linux/device.h>
+
+#define ST_LSM6DS3_DEV_NAME "lsm6ds3"
+#define ST_LSM6DSM_DEV_NAME "lsm6dsm"
+
+enum st_lsm6dsx_hw_id {
+ ST_LSM6DS3_ID,
+ ST_LSM6DSM_ID,
+};
+
+#define ST_LSM6DSX_CHAN_SIZE 2
+#define ST_LSM6DSX_SAMPLE_SIZE 6
+#define ST_LSM6DSX_SAMPLE_DEPTH (ST_LSM6DSX_SAMPLE_SIZE / \
+ ST_LSM6DSX_CHAN_SIZE)
+
+#if defined(CONFIG_SPI_MASTER)
+#define ST_LSM6DSX_RX_MAX_LENGTH 256
+#define ST_LSM6DSX_TX_MAX_LENGTH 8
+
+struct st_lsm6dsx_transfer_buffer {
+ u8 rx_buf[ST_LSM6DSX_RX_MAX_LENGTH];
+ u8 tx_buf[ST_LSM6DSX_TX_MAX_LENGTH] ____cacheline_aligned;
+};
+#endif /* CONFIG_SPI_MASTER */
+
+struct st_lsm6dsx_transfer_function {
+ int (*read)(struct device *dev, u8 addr, int len, u8 *data);
+ int (*write)(struct device *dev, u8 addr, int len, u8 *data);
+};
+
+struct st_lsm6dsx_reg {
+ u8 addr;
+ u8 mask;
+};
+
+struct st_lsm6dsx_settings {
+ u8 wai;
+ u16 max_fifo_size;
+ enum st_lsm6dsx_hw_id id;
+};
+
+enum st_lsm6dsx_sensor_id {
+ ST_LSM6DSX_ID_ACC,
+ ST_LSM6DSX_ID_GYRO,
+ ST_LSM6DSX_ID_MAX,
+};
+
+enum st_lsm6dsx_fifo_mode {
+ ST_LSM6DSX_FIFO_BYPASS = 0x0,
+ ST_LSM6DSX_FIFO_CONT = 0x6,
+};
+
+/**
+ * struct st_lsm6dsx_sensor - ST IMU sensor instance
+ * @id: Sensor identifier.
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ * @gain: Configured sensor sensitivity.
+ * @odr: Output data rate of the sensor [Hz].
+ * @watermark: Sensor watermark level.
+ * @sip: Number of samples in a given pattern.
+ * @decimator: FIFO decimation factor.
+ * @decimator_mask: Sensor mask for decimation register.
+ * @delta_ts: Delta time between two consecutive interrupts.
+ * @ts: Latest timestamp from the interrupt handler.
+ */
+struct st_lsm6dsx_sensor {
+ enum st_lsm6dsx_sensor_id id;
+ struct st_lsm6dsx_hw *hw;
+
+ u32 gain;
+ u16 odr;
+
+ u16 watermark;
+ u8 sip;
+ u8 decimator;
+ u8 decimator_mask;
+
+ s64 delta_ts;
+ s64 ts;
+};
+
+/**
+ * struct st_lsm6dsx_hw - ST IMU MEMS hw instance
+ * @dev: Pointer to instance of struct device (I2C or SPI).
+ * @irq: Device interrupt line (I2C or SPI).
+ * @lock: Mutex to protect read and write operations.
+ * @fifo_lock: Mutex to prevent concurrent access to the hw FIFO.
+ * @fifo_mode: FIFO operating mode supported by the device.
+ * @enable_mask: Enabled sensor bitmask.
+ * @sip: Total number of samples (acc/gyro) in a given pattern.
+ * @iio_devs: Pointers to acc/gyro iio_dev instances.
+ * @settings: Pointer to the specific sensor settings in use.
+ * @tf: Transfer function structure used by I/O operations.
+ * @tb: Transfer buffers used by SPI I/O operations.
+ */
+struct st_lsm6dsx_hw {
+ struct device *dev;
+ int irq;
+
+ struct mutex lock;
+ struct mutex fifo_lock;
+
+ enum st_lsm6dsx_fifo_mode fifo_mode;
+ u8 enable_mask;
+ u8 sip;
+
+ struct iio_dev *iio_devs[ST_LSM6DSX_ID_MAX];
+
+ const struct st_lsm6dsx_settings *settings;
+
+ const struct st_lsm6dsx_transfer_function *tf;
+#if defined(CONFIG_SPI_MASTER)
+ struct st_lsm6dsx_transfer_buffer tb;
+#endif /* CONFIG_SPI_MASTER */
+};
+
+int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
+ const struct st_lsm6dsx_transfer_function *tf_ops);
+int st_lsm6dsx_sensor_enable(struct st_lsm6dsx_sensor *sensor);
+int st_lsm6dsx_sensor_disable(struct st_lsm6dsx_sensor *sensor);
+int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_write_with_mask(struct st_lsm6dsx_hw *hw, u8 addr, u8 mask,
+ u8 val);
+int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor,
+ u16 watermark);
+
+#endif /* ST_LSM6DSX_H */
--- /dev/null
+/*
+ * STMicroelectronics st_lsm6dsx FIFO buffer library driver
+ *
+ * LSM6DS3/LSM6DSM: The FIFO buffer can be configured to store data
+ * from gyroscope and accelerometer. Samples are queued without any tag
+ * according to a specific pattern based on 'FIFO data sets' (6 bytes each):
+ * - 1st data set is reserved for gyroscope data
+ * - 2nd data set is reserved for accelerometer data
+ * The FIFO pattern changes depending on the ODRs and decimation factors
+ * assigned to the FIFO data sets. The first sequence of data stored in FIFO
+ * buffer contains the data of all the enabled FIFO data sets
+ * (e.g. Gx, Gy, Gz, Ax, Ay, Az), then data are repeated depending on the
+ * value of the decimation factor and ODR set for each FIFO data set.
+ * FIFO supported modes:
+ * - BYPASS: FIFO disabled
+ * - CONTINUOUS: FIFO enabled. When the buffer is full, the FIFO index
+ * restarts from the beginning and the oldest sample is overwritten
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+
+#include "st_lsm6dsx.h"
+
+#define ST_LSM6DSX_REG_FIFO_THL_ADDR 0x06
+#define ST_LSM6DSX_REG_FIFO_THH_ADDR 0x07
+#define ST_LSM6DSX_FIFO_TH_MASK GENMASK(11, 0)
+#define ST_LSM6DSX_REG_FIFO_DEC_GXL_ADDR 0x08
+#define ST_LSM6DSX_REG_FIFO_MODE_ADDR 0x0a
+#define ST_LSM6DSX_FIFO_MODE_MASK GENMASK(2, 0)
+#define ST_LSM6DSX_FIFO_ODR_MASK GENMASK(6, 3)
+#define ST_LSM6DSX_REG_FIFO_DIFFL_ADDR 0x3a
+#define ST_LSM6DSX_FIFO_DIFF_MASK GENMASK(11, 0)
+#define ST_LSM6DSX_FIFO_EMPTY_MASK BIT(12)
+#define ST_LSM6DSX_REG_FIFO_OUTL_ADDR 0x3e
+
+#define ST_LSM6DSX_MAX_FIFO_ODR_VAL 0x08
+
+struct st_lsm6dsx_decimator_entry {
+ u8 decimator;
+ u8 val;
+};
+
+static const
+struct st_lsm6dsx_decimator_entry st_lsm6dsx_decimator_table[] = {
+ { 0, 0x0 },
+ { 1, 0x1 },
+ { 2, 0x2 },
+ { 3, 0x3 },
+ { 4, 0x4 },
+ { 8, 0x5 },
+ { 16, 0x6 },
+ { 32, 0x7 },
+};
+
+static int st_lsm6dsx_get_decimator_val(u8 val)
+{
+ const int max_size = ARRAY_SIZE(st_lsm6dsx_decimator_table);
+ int i;
+
+ for (i = 0; i < max_size; i++)
+ if (st_lsm6dsx_decimator_table[i].decimator == val)
+ break;
+
+ return i == max_size ? 0 : st_lsm6dsx_decimator_table[i].val;
+}
+
+static void st_lsm6dsx_get_max_min_odr(struct st_lsm6dsx_hw *hw,
+ u16 *max_odr, u16 *min_odr)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ int i;
+
+ *max_odr = 0, *min_odr = ~0;
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ sensor = iio_priv(hw->iio_devs[i]);
+
+ if (!(hw->enable_mask & BIT(sensor->id)))
+ continue;
+
+ *max_odr = max_t(u16, *max_odr, sensor->odr);
+ *min_odr = min_t(u16, *min_odr, sensor->odr);
+ }
+}
+
+static int st_lsm6dsx_update_decimators(struct st_lsm6dsx_hw *hw)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ u16 max_odr, min_odr, sip = 0;
+ int err, i;
+ u8 data;
+
+ st_lsm6dsx_get_max_min_odr(hw, &max_odr, &min_odr);
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ sensor = iio_priv(hw->iio_devs[i]);
+
+ /* update fifo decimators and sample in pattern */
+ if (hw->enable_mask & BIT(sensor->id)) {
+ sensor->sip = sensor->odr / min_odr;
+ sensor->decimator = max_odr / sensor->odr;
+ data = st_lsm6dsx_get_decimator_val(sensor->decimator);
+ } else {
+ sensor->sip = 0;
+ sensor->decimator = 0;
+ data = 0;
+ }
+
+ err = st_lsm6dsx_write_with_mask(hw,
+ ST_LSM6DSX_REG_FIFO_DEC_GXL_ADDR,
+ sensor->decimator_mask, data);
+ if (err < 0)
+ return err;
+
+ sip += sensor->sip;
+ }
+ hw->sip = sip;
+
+ return 0;
+}
+
+static int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw,
+ enum st_lsm6dsx_fifo_mode fifo_mode)
+{
+ u8 data;
+ int err;
+
+ switch (fifo_mode) {
+ case ST_LSM6DSX_FIFO_BYPASS:
+ data = fifo_mode;
+ break;
+ case ST_LSM6DSX_FIFO_CONT:
+ data = (ST_LSM6DSX_MAX_FIFO_ODR_VAL <<
+ __ffs(ST_LSM6DSX_FIFO_ODR_MASK)) | fifo_mode;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ err = hw->tf->write(hw->dev, ST_LSM6DSX_REG_FIFO_MODE_ADDR,
+ sizeof(data), &data);
+ if (err < 0)
+ return err;
+
+ hw->fifo_mode = fifo_mode;
+
+ return 0;
+}
+
+int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor, u16 watermark)
+{
+ u16 fifo_watermark = ~0, cur_watermark, sip = 0;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ struct st_lsm6dsx_sensor *cur_sensor;
+ __le16 wdata;
+ int i, err;
+ u8 data;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ cur_sensor = iio_priv(hw->iio_devs[i]);
+
+ if (!(hw->enable_mask & BIT(cur_sensor->id)))
+ continue;
+
+ cur_watermark = (cur_sensor == sensor) ? watermark
+ : cur_sensor->watermark;
+
+ fifo_watermark = min_t(u16, fifo_watermark, cur_watermark);
+ sip += cur_sensor->sip;
+ }
+
+ if (!sip)
+ return 0;
+
+ fifo_watermark = max_t(u16, fifo_watermark, sip);
+ fifo_watermark = (fifo_watermark / sip) * sip;
+ fifo_watermark = fifo_watermark * ST_LSM6DSX_SAMPLE_DEPTH;
+
+ mutex_lock(&hw->lock);
+
+ err = hw->tf->read(hw->dev, ST_LSM6DSX_REG_FIFO_THH_ADDR,
+ sizeof(data), &data);
+ if (err < 0)
+ goto out;
+
+ fifo_watermark = ((data & ~ST_LSM6DSX_FIFO_TH_MASK) << 8) |
+ (fifo_watermark & ST_LSM6DSX_FIFO_TH_MASK);
+
+ wdata = cpu_to_le16(fifo_watermark);
+ err = hw->tf->write(hw->dev, ST_LSM6DSX_REG_FIFO_THL_ADDR,
+ sizeof(wdata), (u8 *)&wdata);
+out:
+ mutex_unlock(&hw->lock);
+
+ return err < 0 ? err : 0;
+}
+
+/**
+ * st_lsm6dsx_read_fifo() - LSM6DS3-LSM6DSM read FIFO routine
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ *
+ * Read samples from the hw FIFO and push them to IIO buffers.
+ *
+ * Return: Number of bytes read from the FIFO
+ */
+static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
+{
+ u16 fifo_len, pattern_len = hw->sip * ST_LSM6DSX_SAMPLE_SIZE;
+ int err, acc_sip, gyro_sip, read_len, samples, offset;
+ struct st_lsm6dsx_sensor *acc_sensor, *gyro_sensor;
+ s64 acc_ts, acc_delta_ts, gyro_ts, gyro_delta_ts;
+ u8 iio_buff[ALIGN(ST_LSM6DSX_SAMPLE_SIZE, sizeof(s64)) + sizeof(s64)];
+ u8 buff[pattern_len];
+ __le16 fifo_status;
+
+ err = hw->tf->read(hw->dev, ST_LSM6DSX_REG_FIFO_DIFFL_ADDR,
+ sizeof(fifo_status), (u8 *)&fifo_status);
+ if (err < 0)
+ return err;
+
+ if (fifo_status & cpu_to_le16(ST_LSM6DSX_FIFO_EMPTY_MASK))
+ return 0;
+
+ fifo_len = (le16_to_cpu(fifo_status) & ST_LSM6DSX_FIFO_DIFF_MASK) *
+ ST_LSM6DSX_CHAN_SIZE;
+ samples = fifo_len / ST_LSM6DSX_SAMPLE_SIZE;
+ fifo_len = (fifo_len / pattern_len) * pattern_len;
+
+ /*
+ * compute delta timestamp between two consecutive samples
+ * in order to estimate queueing time of data generated
+ * by the sensor
+ */
+ acc_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ acc_ts = acc_sensor->ts - acc_sensor->delta_ts;
+ acc_delta_ts = div_s64(acc_sensor->delta_ts * acc_sensor->decimator,
+ samples);
+
+ gyro_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_GYRO]);
+ gyro_ts = gyro_sensor->ts - gyro_sensor->delta_ts;
+ gyro_delta_ts = div_s64(gyro_sensor->delta_ts * gyro_sensor->decimator,
+ samples);
+
+ for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
+ err = hw->tf->read(hw->dev, ST_LSM6DSX_REG_FIFO_OUTL_ADDR,
+ sizeof(buff), buff);
+ if (err < 0)
+ return err;
+
+ /*
+ * Data are written to the FIFO with a specific pattern
+ * depending on the configured ODRs. The first sequence of data
+ * stored in FIFO contains the data of all enabled sensors
+ * (e.g. Gx, Gy, Gz, Ax, Ay, Az), then data are repeated
+ * depending on the value of the decimation factor set for each
+ * sensor.
+ *
+ * Supposing the FIFO is storing data from gyroscope and
+ * accelerometer at different ODRs:
+ * - gyroscope ODR = 208Hz, accelerometer ODR = 104Hz
+ * Since the gyroscope ODR is twice the accelerometer one, the
+ * following pattern is repeated every 9 samples:
+ * - Gx, Gy, Gz, Ax, Ay, Az, Gx, Gy, Gz
+ */
+ gyro_sip = gyro_sensor->sip;
+ acc_sip = acc_sensor->sip;
+ offset = 0;
+
+ while (acc_sip > 0 || gyro_sip > 0) {
+ if (gyro_sip-- > 0) {
+ memcpy(iio_buff, &buff[offset],
+ ST_LSM6DSX_SAMPLE_SIZE);
+ iio_push_to_buffers_with_timestamp(
+ hw->iio_devs[ST_LSM6DSX_ID_GYRO],
+ iio_buff, gyro_ts);
+ offset += ST_LSM6DSX_SAMPLE_SIZE;
+ gyro_ts += gyro_delta_ts;
+ }
+
+ if (acc_sip-- > 0) {
+ memcpy(iio_buff, &buff[offset],
+ ST_LSM6DSX_SAMPLE_SIZE);
+ iio_push_to_buffers_with_timestamp(
+ hw->iio_devs[ST_LSM6DSX_ID_ACC],
+ iio_buff, acc_ts);
+ offset += ST_LSM6DSX_SAMPLE_SIZE;
+ acc_ts += acc_delta_ts;
+ }
+ }
+ }
+
+ return read_len;
+}
+
+static int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw)
+{
+ int err;
+
+ mutex_lock(&hw->fifo_lock);
+
+ st_lsm6dsx_read_fifo(hw);
+ err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_BYPASS);
+
+ mutex_unlock(&hw->fifo_lock);
+
+ return err;
+}
+
+static int st_lsm6dsx_update_fifo(struct iio_dev *iio_dev, bool enable)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int err;
+
+ if (hw->fifo_mode != ST_LSM6DSX_FIFO_BYPASS) {
+ err = st_lsm6dsx_flush_fifo(hw);
+ if (err < 0)
+ return err;
+ }
+
+ if (enable) {
+ err = st_lsm6dsx_sensor_enable(sensor);
+ if (err < 0)
+ return err;
+ } else {
+ err = st_lsm6dsx_sensor_disable(sensor);
+ if (err < 0)
+ return err;
+ }
+
+ err = st_lsm6dsx_update_decimators(hw);
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_update_watermark(sensor, sensor->watermark);
+ if (err < 0)
+ return err;
+
+ if (hw->enable_mask) {
+ err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_CONT);
+ if (err < 0)
+ return err;
+
+ /*
+ * store enable buffer timestamp as reference to compute
+ * first delta timestamp
+ */
+ sensor->ts = iio_get_time_ns(iio_dev);
+ }
+
+ return 0;
+}
+
+static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
+{
+ struct st_lsm6dsx_hw *hw = (struct st_lsm6dsx_hw *)private;
+ struct st_lsm6dsx_sensor *sensor;
+ int i;
+
+ if (!hw->sip)
+ return IRQ_NONE;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ sensor = iio_priv(hw->iio_devs[i]);
+
+ if (sensor->sip > 0) {
+ s64 timestamp;
+
+ timestamp = iio_get_time_ns(hw->iio_devs[i]);
+ sensor->delta_ts = timestamp - sensor->ts;
+ sensor->ts = timestamp;
+ }
+ }
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
+{
+ struct st_lsm6dsx_hw *hw = (struct st_lsm6dsx_hw *)private;
+ int count;
+
+ mutex_lock(&hw->fifo_lock);
+ count = st_lsm6dsx_read_fifo(hw);
+ mutex_unlock(&hw->fifo_lock);
+
+ return !count ? IRQ_NONE : IRQ_HANDLED;
+}
+
+static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev)
+{
+ return st_lsm6dsx_update_fifo(iio_dev, true);
+}
+
+static int st_lsm6dsx_buffer_postdisable(struct iio_dev *iio_dev)
+{
+ return st_lsm6dsx_update_fifo(iio_dev, false);
+}
+
+static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {
+ .preenable = st_lsm6dsx_buffer_preenable,
+ .postdisable = st_lsm6dsx_buffer_postdisable,
+};
+
+int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
+{
+ struct iio_buffer *buffer;
+ unsigned long irq_type;
+ int i, err;
+
+ irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq));
+
+ switch (irq_type) {
+ case IRQF_TRIGGER_HIGH:
+ case IRQF_TRIGGER_RISING:
+ break;
+ default:
+ dev_info(hw->dev, "mode %lx unsupported\n", irq_type);
+ return -EINVAL;
+ }
+
+ err = devm_request_threaded_irq(hw->dev, hw->irq,
+ st_lsm6dsx_handler_irq,
+ st_lsm6dsx_handler_thread,
+ irq_type | IRQF_ONESHOT,
+ "lsm6dsx", hw);
+ if (err) {
+ dev_err(hw->dev, "failed to request trigger irq %d\n",
+ hw->irq);
+ return err;
+ }
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ buffer = devm_iio_kfifo_allocate(hw->dev);
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(hw->iio_devs[i], buffer);
+ hw->iio_devs[i]->modes |= INDIO_BUFFER_SOFTWARE;
+ hw->iio_devs[i]->setup_ops = &st_lsm6dsx_buffer_ops;
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ * STMicroelectronics st_lsm6dsx sensor driver
+ *
+ * The ST LSM6DSx IMU MEMS series consists of 3D digital accelerometer
+ * and 3D digital gyroscope system-in-package with a digital I2C/SPI serial
+ * interface standard output.
+ * LSM6DSx IMU MEMS series has a dynamic user-selectable full-scale
+ * acceleration range of +-2/+-4/+-8/+-16 g and an angular rate range of
+ * +-125/+-245/+-500/+-1000/+-2000 dps
+ * LSM6DSx series has an integrated First-In-First-Out (FIFO) buffer
+ * allowing dynamic batching of sensor data.
+ *
+ * Supported sensors:
+ * - LSM6DS3:
+ * - Accelerometer/Gyroscope supported ODR [Hz]: 13, 26, 52, 104, 208, 416
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
+ * - FIFO size: 8KB
+ *
+ * - LSM6DSM:
+ * - Accelerometer/Gyroscope supported ODR [Hz]: 13, 26, 52, 104, 208, 416
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
+ * - FIFO size: 4KB
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#include "st_lsm6dsx.h"
+
+#define ST_LSM6DSX_REG_ACC_DEC_MASK GENMASK(2, 0)
+#define ST_LSM6DSX_REG_GYRO_DEC_MASK GENMASK(5, 3)
+#define ST_LSM6DSX_REG_INT1_ADDR 0x0d
+#define ST_LSM6DSX_REG_FIFO_FTH_IRQ_MASK BIT(3)
+#define ST_LSM6DSX_REG_WHOAMI_ADDR 0x0f
+#define ST_LSM6DSX_REG_RESET_ADDR 0x12
+#define ST_LSM6DSX_REG_RESET_MASK BIT(0)
+#define ST_LSM6DSX_REG_BDU_ADDR 0x12
+#define ST_LSM6DSX_REG_BDU_MASK BIT(6)
+#define ST_LSM6DSX_REG_INT2_ON_INT1_ADDR 0x13
+#define ST_LSM6DSX_REG_INT2_ON_INT1_MASK BIT(5)
+#define ST_LSM6DSX_REG_ROUNDING_ADDR 0x16
+#define ST_LSM6DSX_REG_ROUNDING_MASK BIT(2)
+#define ST_LSM6DSX_REG_LIR_ADDR 0x58
+#define ST_LSM6DSX_REG_LIR_MASK BIT(0)
+
+#define ST_LSM6DSX_REG_ACC_ODR_ADDR 0x10
+#define ST_LSM6DSX_REG_ACC_ODR_MASK GENMASK(7, 4)
+#define ST_LSM6DSX_REG_ACC_FS_ADDR 0x10
+#define ST_LSM6DSX_REG_ACC_FS_MASK GENMASK(3, 2)
+#define ST_LSM6DSX_REG_ACC_OUT_X_L_ADDR 0x28
+#define ST_LSM6DSX_REG_ACC_OUT_Y_L_ADDR 0x2a
+#define ST_LSM6DSX_REG_ACC_OUT_Z_L_ADDR 0x2c
+
+#define ST_LSM6DSX_REG_GYRO_ODR_ADDR 0x11
+#define ST_LSM6DSX_REG_GYRO_ODR_MASK GENMASK(7, 4)
+#define ST_LSM6DSX_REG_GYRO_FS_ADDR 0x11
+#define ST_LSM6DSX_REG_GYRO_FS_MASK GENMASK(3, 2)
+#define ST_LSM6DSX_REG_GYRO_OUT_X_L_ADDR 0x22
+#define ST_LSM6DSX_REG_GYRO_OUT_Y_L_ADDR 0x24
+#define ST_LSM6DSX_REG_GYRO_OUT_Z_L_ADDR 0x26
+
+#define ST_LSM6DS3_WHOAMI 0x69
+#define ST_LSM6DSM_WHOAMI 0x6a
+
+#define ST_LSM6DS3_MAX_FIFO_SIZE 8192
+#define ST_LSM6DSM_MAX_FIFO_SIZE 4096
+
+#define ST_LSM6DSX_ACC_FS_2G_GAIN IIO_G_TO_M_S_2(61)
+#define ST_LSM6DSX_ACC_FS_4G_GAIN IIO_G_TO_M_S_2(122)
+#define ST_LSM6DSX_ACC_FS_8G_GAIN IIO_G_TO_M_S_2(244)
+#define ST_LSM6DSX_ACC_FS_16G_GAIN IIO_G_TO_M_S_2(488)
+
+#define ST_LSM6DSX_GYRO_FS_245_GAIN IIO_DEGREE_TO_RAD(8750)
+#define ST_LSM6DSX_GYRO_FS_500_GAIN IIO_DEGREE_TO_RAD(17500)
+#define ST_LSM6DSX_GYRO_FS_1000_GAIN IIO_DEGREE_TO_RAD(35000)
+#define ST_LSM6DSX_GYRO_FS_2000_GAIN IIO_DEGREE_TO_RAD(70000)
+
+struct st_lsm6dsx_odr {
+ u16 hz;
+ u8 val;
+};
+
+#define ST_LSM6DSX_ODR_LIST_SIZE 6
+struct st_lsm6dsx_odr_table_entry {
+ struct st_lsm6dsx_reg reg;
+ struct st_lsm6dsx_odr odr_avl[ST_LSM6DSX_ODR_LIST_SIZE];
+};
+
+static const struct st_lsm6dsx_odr_table_entry st_lsm6dsx_odr_table[] = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = ST_LSM6DSX_REG_ACC_ODR_ADDR,
+ .mask = ST_LSM6DSX_REG_ACC_ODR_MASK,
+ },
+ .odr_avl[0] = { 13, 0x01 },
+ .odr_avl[1] = { 26, 0x02 },
+ .odr_avl[2] = { 52, 0x03 },
+ .odr_avl[3] = { 104, 0x04 },
+ .odr_avl[4] = { 208, 0x05 },
+ .odr_avl[5] = { 416, 0x06 },
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = ST_LSM6DSX_REG_GYRO_ODR_ADDR,
+ .mask = ST_LSM6DSX_REG_GYRO_ODR_MASK,
+ },
+ .odr_avl[0] = { 13, 0x01 },
+ .odr_avl[1] = { 26, 0x02 },
+ .odr_avl[2] = { 52, 0x03 },
+ .odr_avl[3] = { 104, 0x04 },
+ .odr_avl[4] = { 208, 0x05 },
+ .odr_avl[5] = { 416, 0x06 },
+ }
+};
+
+struct st_lsm6dsx_fs {
+ u32 gain;
+ u8 val;
+};
+
+#define ST_LSM6DSX_FS_LIST_SIZE 4
+struct st_lsm6dsx_fs_table_entry {
+ struct st_lsm6dsx_reg reg;
+ struct st_lsm6dsx_fs fs_avl[ST_LSM6DSX_FS_LIST_SIZE];
+};
+
+static const struct st_lsm6dsx_fs_table_entry st_lsm6dsx_fs_table[] = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = ST_LSM6DSX_REG_ACC_FS_ADDR,
+ .mask = ST_LSM6DSX_REG_ACC_FS_MASK,
+ },
+ .fs_avl[0] = { ST_LSM6DSX_ACC_FS_2G_GAIN, 0x0 },
+ .fs_avl[1] = { ST_LSM6DSX_ACC_FS_4G_GAIN, 0x2 },
+ .fs_avl[2] = { ST_LSM6DSX_ACC_FS_8G_GAIN, 0x3 },
+ .fs_avl[3] = { ST_LSM6DSX_ACC_FS_16G_GAIN, 0x1 },
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = ST_LSM6DSX_REG_GYRO_FS_ADDR,
+ .mask = ST_LSM6DSX_REG_GYRO_FS_MASK,
+ },
+ .fs_avl[0] = { ST_LSM6DSX_GYRO_FS_245_GAIN, 0x0 },
+ .fs_avl[1] = { ST_LSM6DSX_GYRO_FS_500_GAIN, 0x1 },
+ .fs_avl[2] = { ST_LSM6DSX_GYRO_FS_1000_GAIN, 0x2 },
+ .fs_avl[3] = { ST_LSM6DSX_GYRO_FS_2000_GAIN, 0x3 },
+ }
+};
+
+static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
+ {
+ .wai = ST_LSM6DS3_WHOAMI,
+ .max_fifo_size = ST_LSM6DS3_MAX_FIFO_SIZE,
+ .id = ST_LSM6DS3_ID,
+ },
+ {
+ .wai = ST_LSM6DSM_WHOAMI,
+ .max_fifo_size = ST_LSM6DSM_MAX_FIFO_SIZE,
+ .id = ST_LSM6DSM_ID,
+ },
+};
+
+#define ST_LSM6DSX_CHANNEL(chan_type, addr, mod, scan_idx) \
+{ \
+ .type = chan_type, \
+ .address = addr, \
+ .modified = 1, \
+ .channel2 = mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = scan_idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+ }, \
+}
+
+static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
+ ST_LSM6DSX_CHANNEL(IIO_ACCEL, ST_LSM6DSX_REG_ACC_OUT_X_L_ADDR,
+ IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL(IIO_ACCEL, ST_LSM6DSX_REG_ACC_OUT_Y_L_ADDR,
+ IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL(IIO_ACCEL, ST_LSM6DSX_REG_ACC_OUT_Z_L_ADDR,
+ IIO_MOD_Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec st_lsm6dsx_gyro_channels[] = {
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, ST_LSM6DSX_REG_GYRO_OUT_X_L_ADDR,
+ IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, ST_LSM6DSX_REG_GYRO_OUT_Y_L_ADDR,
+ IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, ST_LSM6DSX_REG_GYRO_OUT_Z_L_ADDR,
+ IIO_MOD_Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+int st_lsm6dsx_write_with_mask(struct st_lsm6dsx_hw *hw, u8 addr, u8 mask,
+ u8 val)
+{
+ u8 data;
+ int err;
+
+ mutex_lock(&hw->lock);
+
+ err = hw->tf->read(hw->dev, addr, sizeof(data), &data);
+ if (err < 0) {
+ dev_err(hw->dev, "failed to read %02x register\n", addr);
+ goto out;
+ }
+
+ data = (data & ~mask) | ((val << __ffs(mask)) & mask);
+
+ err = hw->tf->write(hw->dev, addr, sizeof(data), &data);
+ if (err < 0)
+ dev_err(hw->dev, "failed to write %02x register\n", addr);
+
+out:
+ mutex_unlock(&hw->lock);
+
+ return err;
+}
+
+static int st_lsm6dsx_check_whoami(struct st_lsm6dsx_hw *hw, int id)
+{
+ int err, i;
+ u8 data;
+
+ for (i = 0; i < ARRAY_SIZE(st_lsm6dsx_sensor_settings); i++) {
+ if (id == st_lsm6dsx_sensor_settings[i].id)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(st_lsm6dsx_sensor_settings)) {
+ dev_err(hw->dev, "unsupported hw id [%02x]\n", id);
+ return -ENODEV;
+ }
+
+ err = hw->tf->read(hw->dev, ST_LSM6DSX_REG_WHOAMI_ADDR, sizeof(data),
+ &data);
+ if (err < 0) {
+ dev_err(hw->dev, "failed to read whoami register\n");
+ return err;
+ }
+
+ if (data != st_lsm6dsx_sensor_settings[i].wai) {
+ dev_err(hw->dev, "unsupported whoami [%02x]\n", data);
+ return -ENODEV;
+ }
+
+ hw->settings = &st_lsm6dsx_sensor_settings[i];
+
+ return 0;
+}
+
+static int st_lsm6dsx_set_full_scale(struct st_lsm6dsx_sensor *sensor,
+ u32 gain)
+{
+ enum st_lsm6dsx_sensor_id id = sensor->id;
+ int i, err;
+ u8 val;
+
+ for (i = 0; i < ST_LSM6DSX_FS_LIST_SIZE; i++)
+ if (st_lsm6dsx_fs_table[id].fs_avl[i].gain == gain)
+ break;
+
+ if (i == ST_LSM6DSX_FS_LIST_SIZE)
+ return -EINVAL;
+
+ val = st_lsm6dsx_fs_table[id].fs_avl[i].val;
+ err = st_lsm6dsx_write_with_mask(sensor->hw,
+ st_lsm6dsx_fs_table[id].reg.addr,
+ st_lsm6dsx_fs_table[id].reg.mask,
+ val);
+ if (err < 0)
+ return err;
+
+ sensor->gain = gain;
+
+ return 0;
+}
+
+static int st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u16 odr)
+{
+ enum st_lsm6dsx_sensor_id id = sensor->id;
+ int i, err;
+ u8 val;
+
+ for (i = 0; i < ST_LSM6DSX_ODR_LIST_SIZE; i++)
+ if (st_lsm6dsx_odr_table[id].odr_avl[i].hz == odr)
+ break;
+
+ if (i == ST_LSM6DSX_ODR_LIST_SIZE)
+ return -EINVAL;
+
+ val = st_lsm6dsx_odr_table[id].odr_avl[i].val;
+ err = st_lsm6dsx_write_with_mask(sensor->hw,
+ st_lsm6dsx_odr_table[id].reg.addr,
+ st_lsm6dsx_odr_table[id].reg.mask,
+ val);
+ if (err < 0)
+ return err;
+
+ sensor->odr = odr;
+
+ return 0;
+}
+
+int st_lsm6dsx_sensor_enable(struct st_lsm6dsx_sensor *sensor)
+{
+ int err;
+
+ err = st_lsm6dsx_set_odr(sensor, sensor->odr);
+ if (err < 0)
+ return err;
+
+ sensor->hw->enable_mask |= BIT(sensor->id);
+
+ return 0;
+}
+
+int st_lsm6dsx_sensor_disable(struct st_lsm6dsx_sensor *sensor)
+{
+ enum st_lsm6dsx_sensor_id id = sensor->id;
+ int err;
+
+ err = st_lsm6dsx_write_with_mask(sensor->hw,
+ st_lsm6dsx_odr_table[id].reg.addr,
+ st_lsm6dsx_odr_table[id].reg.mask, 0);
+ if (err < 0)
+ return err;
+
+ sensor->hw->enable_mask &= ~BIT(id);
+
+ return 0;
+}
+
+static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
+ u8 addr, int *val)
+{
+ int err, delay;
+ __le16 data;
+
+ err = st_lsm6dsx_sensor_enable(sensor);
+ if (err < 0)
+ return err;
+
+ delay = 1000000 / sensor->odr;
+ usleep_range(delay, 2 * delay);
+
+ err = sensor->hw->tf->read(sensor->hw->dev, addr, sizeof(data),
+ (u8 *)&data);
+ if (err < 0)
+ return err;
+
+ st_lsm6dsx_sensor_disable(sensor);
+
+ *val = (s16)data;
+
+ return IIO_VAL_INT;
+}
+
+static int st_lsm6dsx_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *ch,
+ int *val, int *val2, long mask)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(iio_dev);
+ if (ret)
+ break;
+
+ ret = st_lsm6dsx_read_oneshot(sensor, ch->address, val);
+ iio_device_release_direct_mode(iio_dev);
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = sensor->odr;
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = sensor->gain;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ int err;
+
+ err = iio_device_claim_direct_mode(iio_dev);
+ if (err)
+ return err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ err = st_lsm6dsx_set_full_scale(sensor, val2);
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ err = st_lsm6dsx_set_odr(sensor, val);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ iio_device_release_direct_mode(iio_dev);
+
+ return err;
+}
+
+static int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int err, max_fifo_len;
+
+ max_fifo_len = hw->settings->max_fifo_size / ST_LSM6DSX_SAMPLE_SIZE;
+ if (val < 1 || val > max_fifo_len)
+ return -EINVAL;
+
+ err = st_lsm6dsx_update_watermark(sensor, val);
+ if (err < 0)
+ return err;
+
+ sensor->watermark = val;
+
+ return 0;
+}
+
+static ssize_t
+st_lsm6dsx_sysfs_sampling_frequency_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(dev_get_drvdata(dev));
+ enum st_lsm6dsx_sensor_id id = sensor->id;
+ int i, len = 0;
+
+ for (i = 0; i < ST_LSM6DSX_ODR_LIST_SIZE; i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d ",
+ st_lsm6dsx_odr_table[id].odr_avl[i].hz);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t st_lsm6dsx_sysfs_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(dev_get_drvdata(dev));
+ enum st_lsm6dsx_sensor_id id = sensor->id;
+ int i, len = 0;
+
+ for (i = 0; i < ST_LSM6DSX_FS_LIST_SIZE; i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ",
+ st_lsm6dsx_fs_table[id].fs_avl[i].gain);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(st_lsm6dsx_sysfs_sampling_frequency_avail);
+static IIO_DEVICE_ATTR(in_accel_scale_available, 0444,
+ st_lsm6dsx_sysfs_scale_avail, NULL, 0);
+static IIO_DEVICE_ATTR(in_anglvel_scale_available, 0444,
+ st_lsm6dsx_sysfs_scale_avail, NULL, 0);
+
+static struct attribute *st_lsm6dsx_acc_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_lsm6dsx_acc_attribute_group = {
+ .attrs = st_lsm6dsx_acc_attributes,
+};
+
+static const struct iio_info st_lsm6dsx_acc_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &st_lsm6dsx_acc_attribute_group,
+ .read_raw = st_lsm6dsx_read_raw,
+ .write_raw = st_lsm6dsx_write_raw,
+ .hwfifo_set_watermark = st_lsm6dsx_set_watermark,
+};
+
+static struct attribute *st_lsm6dsx_gyro_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_anglvel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_lsm6dsx_gyro_attribute_group = {
+ .attrs = st_lsm6dsx_gyro_attributes,
+};
+
+static const struct iio_info st_lsm6dsx_gyro_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &st_lsm6dsx_gyro_attribute_group,
+ .read_raw = st_lsm6dsx_read_raw,
+ .write_raw = st_lsm6dsx_write_raw,
+ .hwfifo_set_watermark = st_lsm6dsx_set_watermark,
+};
+
+static const unsigned long st_lsm6dsx_available_scan_masks[] = {0x7, 0x0};
+
+static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw)
+{
+ int err;
+ u8 data;
+
+ data = ST_LSM6DSX_REG_RESET_MASK;
+ err = hw->tf->write(hw->dev, ST_LSM6DSX_REG_RESET_ADDR, sizeof(data),
+ &data);
+ if (err < 0)
+ return err;
+
+ msleep(200);
+
+ /* latch interrupts */
+ err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_LIR_ADDR,
+ ST_LSM6DSX_REG_LIR_MASK, 1);
+ if (err < 0)
+ return err;
+
+ /* enable Block Data Update */
+ err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_BDU_ADDR,
+ ST_LSM6DSX_REG_BDU_MASK, 1);
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_ROUNDING_ADDR,
+ ST_LSM6DSX_REG_ROUNDING_MASK, 1);
+ if (err < 0)
+ return err;
+
+ /* enable FIFO watermak interrupt */
+ err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_INT1_ADDR,
+ ST_LSM6DSX_REG_FIFO_FTH_IRQ_MASK, 1);
+ if (err < 0)
+ return err;
+
+ /* redirect INT2 on INT1 */
+ return st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_INT2_ON_INT1_ADDR,
+ ST_LSM6DSX_REG_INT2_ON_INT1_MASK, 1);
+}
+
+static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw,
+ enum st_lsm6dsx_sensor_id id)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ struct iio_dev *iio_dev;
+
+ iio_dev = devm_iio_device_alloc(hw->dev, sizeof(*sensor));
+ if (!iio_dev)
+ return NULL;
+
+ iio_dev->modes = INDIO_DIRECT_MODE;
+ iio_dev->dev.parent = hw->dev;
+ iio_dev->available_scan_masks = st_lsm6dsx_available_scan_masks;
+
+ sensor = iio_priv(iio_dev);
+ sensor->id = id;
+ sensor->hw = hw;
+ sensor->odr = st_lsm6dsx_odr_table[id].odr_avl[0].hz;
+ sensor->gain = st_lsm6dsx_fs_table[id].fs_avl[0].gain;
+ sensor->watermark = 1;
+
+ switch (id) {
+ case ST_LSM6DSX_ID_ACC:
+ iio_dev->channels = st_lsm6dsx_acc_channels;
+ iio_dev->num_channels = ARRAY_SIZE(st_lsm6dsx_acc_channels);
+ iio_dev->name = "lsm6dsx_accel";
+ iio_dev->info = &st_lsm6dsx_acc_info;
+
+ sensor->decimator_mask = ST_LSM6DSX_REG_ACC_DEC_MASK;
+ break;
+ case ST_LSM6DSX_ID_GYRO:
+ iio_dev->channels = st_lsm6dsx_gyro_channels;
+ iio_dev->num_channels = ARRAY_SIZE(st_lsm6dsx_gyro_channels);
+ iio_dev->name = "lsm6dsx_gyro";
+ iio_dev->info = &st_lsm6dsx_gyro_info;
+
+ sensor->decimator_mask = ST_LSM6DSX_REG_GYRO_DEC_MASK;
+ break;
+ default:
+ return NULL;
+ }
+
+ return iio_dev;
+}
+
+int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
+ const struct st_lsm6dsx_transfer_function *tf_ops)
+{
+ struct st_lsm6dsx_hw *hw;
+ int i, err;
+
+ hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL);
+ if (!hw)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, (void *)hw);
+
+ mutex_init(&hw->lock);
+ mutex_init(&hw->fifo_lock);
+
+ hw->dev = dev;
+ hw->irq = irq;
+ hw->tf = tf_ops;
+
+ err = st_lsm6dsx_check_whoami(hw, hw_id);
+ if (err < 0)
+ return err;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ hw->iio_devs[i] = st_lsm6dsx_alloc_iiodev(hw, i);
+ if (!hw->iio_devs[i])
+ return -ENOMEM;
+ }
+
+ err = st_lsm6dsx_init_device(hw);
+ if (err < 0)
+ return err;
+
+ if (hw->irq > 0) {
+ err = st_lsm6dsx_fifo_setup(hw);
+ if (err < 0)
+ return err;
+ }
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ err = devm_iio_device_register(hw->dev, hw->iio_devs[i]);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(st_lsm6dsx_probe);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * STMicroelectronics st_lsm6dsx i2c driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+#include "st_lsm6dsx.h"
+
+static int st_lsm6dsx_i2c_read(struct device *dev, u8 addr, int len, u8 *data)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_msg msg[2];
+
+ msg[0].addr = client->addr;
+ msg[0].flags = client->flags;
+ msg[0].len = 1;
+ msg[0].buf = &addr;
+
+ msg[1].addr = client->addr;
+ msg[1].flags = client->flags | I2C_M_RD;
+ msg[1].len = len;
+ msg[1].buf = data;
+
+ return i2c_transfer(client->adapter, msg, 2);
+}
+
+static int st_lsm6dsx_i2c_write(struct device *dev, u8 addr, int len, u8 *data)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_msg msg;
+ u8 send[len + 1];
+
+ send[0] = addr;
+ memcpy(&send[1], data, len * sizeof(u8));
+
+ msg.addr = client->addr;
+ msg.flags = client->flags;
+ msg.len = len + 1;
+ msg.buf = send;
+
+ return i2c_transfer(client->adapter, &msg, 1);
+}
+
+static const struct st_lsm6dsx_transfer_function st_lsm6dsx_transfer_fn = {
+ .read = st_lsm6dsx_i2c_read,
+ .write = st_lsm6dsx_i2c_write,
+};
+
+static int st_lsm6dsx_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ return st_lsm6dsx_probe(&client->dev, client->irq,
+ (int)id->driver_data,
+ &st_lsm6dsx_transfer_fn);
+}
+
+static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
+ {
+ .compatible = "st,lsm6ds3",
+ .data = (void *)ST_LSM6DS3_ID,
+ },
+ {
+ .compatible = "st,lsm6dsm",
+ .data = (void *)ST_LSM6DSM_ID,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
+
+static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
+ { ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
+ { ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table);
+
+static struct i2c_driver st_lsm6dsx_driver = {
+ .driver = {
+ .name = "st_lsm6dsx_i2c",
+ .of_match_table = of_match_ptr(st_lsm6dsx_i2c_of_match),
+ },
+ .probe = st_lsm6dsx_i2c_probe,
+ .id_table = st_lsm6dsx_i2c_id_table,
+};
+module_i2c_driver(st_lsm6dsx_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i2c driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * STMicroelectronics st_lsm6dsx spi driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+#include "st_lsm6dsx.h"
+
+#define SENSORS_SPI_READ BIT(7)
+
+static int st_lsm6dsx_spi_read(struct device *dev, u8 addr, int len,
+ u8 *data)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct st_lsm6dsx_hw *hw = spi_get_drvdata(spi);
+ int err;
+
+ struct spi_transfer xfers[] = {
+ {
+ .tx_buf = hw->tb.tx_buf,
+ .bits_per_word = 8,
+ .len = 1,
+ },
+ {
+ .rx_buf = hw->tb.rx_buf,
+ .bits_per_word = 8,
+ .len = len,
+ }
+ };
+
+ hw->tb.tx_buf[0] = addr | SENSORS_SPI_READ;
+
+ err = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers));
+ if (err < 0)
+ return err;
+
+ memcpy(data, hw->tb.rx_buf, len * sizeof(u8));
+
+ return len;
+}
+
+static int st_lsm6dsx_spi_write(struct device *dev, u8 addr, int len,
+ u8 *data)
+{
+ struct st_lsm6dsx_hw *hw;
+ struct spi_device *spi;
+
+ if (len >= ST_LSM6DSX_TX_MAX_LENGTH)
+ return -ENOMEM;
+
+ spi = to_spi_device(dev);
+ hw = spi_get_drvdata(spi);
+
+ hw->tb.tx_buf[0] = addr;
+ memcpy(&hw->tb.tx_buf[1], data, len);
+
+ return spi_write(spi, hw->tb.tx_buf, len + 1);
+}
+
+static const struct st_lsm6dsx_transfer_function st_lsm6dsx_transfer_fn = {
+ .read = st_lsm6dsx_spi_read,
+ .write = st_lsm6dsx_spi_write,
+};
+
+static int st_lsm6dsx_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+
+ return st_lsm6dsx_probe(&spi->dev, spi->irq,
+ (int)id->driver_data,
+ &st_lsm6dsx_transfer_fn);
+}
+
+static const struct of_device_id st_lsm6dsx_spi_of_match[] = {
+ {
+ .compatible = "st,lsm6ds3",
+ .data = (void *)ST_LSM6DS3_ID,
+ },
+ {
+ .compatible = "st,lsm6dsm",
+ .data = (void *)ST_LSM6DSM_ID,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_lsm6dsx_spi_of_match);
+
+static const struct spi_device_id st_lsm6dsx_spi_id_table[] = {
+ { ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
+ { ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_lsm6dsx_spi_id_table);
+
+static struct spi_driver st_lsm6dsx_driver = {
+ .driver = {
+ .name = "st_lsm6dsx_spi",
+ .of_match_table = of_match_ptr(st_lsm6dsx_spi_of_match),
+ },
+ .probe = st_lsm6dsx_spi_probe,
+ .id_table = st_lsm6dsx_spi_id_table,
+};
+module_spi_driver(st_lsm6dsx_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx spi driver");
+MODULE_LICENSE("GPL v2");
return NULL;
}
-static struct iio_trigger *iio_trigger_find_by_name(const char *name,
- size_t len)
+static struct iio_trigger *iio_trigger_acquire_by_name(const char *name)
{
struct iio_trigger *trig = NULL, *iter;
list_for_each_entry(iter, &iio_trigger_list, list)
if (sysfs_streq(iter->name, name)) {
trig = iter;
+ iio_trigger_get(trig);
break;
}
mutex_unlock(&iio_trigger_list_lock);
}
mutex_unlock(&indio_dev->mlock);
- trig = iio_trigger_find_by_name(buf, len);
- if (oldtrig == trig)
- return len;
+ trig = iio_trigger_acquire_by_name(buf);
+ if (oldtrig == trig) {
+ ret = len;
+ goto out_trigger_put;
+ }
if (trig && indio_dev->info->validate_trigger) {
ret = indio_dev->info->validate_trigger(indio_dev, trig);
if (ret)
- return ret;
+ goto out_trigger_put;
}
if (trig && trig->ops->validate_device) {
ret = trig->ops->validate_device(trig, indio_dev);
if (ret)
- return ret;
+ goto out_trigger_put;
}
indio_dev->trig = trig;
iio_trigger_put(oldtrig);
}
if (indio_dev->trig) {
- iio_trigger_get(indio_dev->trig);
if (indio_dev->modes & INDIO_EVENT_TRIGGERED)
iio_trigger_attach_poll_func(indio_dev->trig,
indio_dev->pollfunc_event);
}
return len;
+
+out_trigger_put:
+ iio_trigger_put(trig);
+ return ret;
}
static DEVICE_ATTR(current_trigger, S_IRUGO | S_IWUSR,
kfree(trig);
}
-static struct device_type iio_trig_type = {
+static const struct device_type iio_trig_type = {
.release = iio_trig_release,
.groups = iio_trig_dev_groups,
};
static struct iio_trigger *viio_trigger_alloc(const char *fmt, va_list vargs)
{
struct iio_trigger *trig;
+ int i;
+
trig = kzalloc(sizeof *trig, GFP_KERNEL);
- if (trig) {
- int i;
- trig->dev.type = &iio_trig_type;
- trig->dev.bus = &iio_bus_type;
- device_initialize(&trig->dev);
-
- mutex_init(&trig->pool_lock);
- trig->subirq_base
- = irq_alloc_descs(-1, 0,
- CONFIG_IIO_CONSUMERS_PER_TRIGGER,
- 0);
- if (trig->subirq_base < 0) {
- kfree(trig);
- return NULL;
- }
+ if (!trig)
+ return NULL;
- trig->name = kvasprintf(GFP_KERNEL, fmt, vargs);
- if (trig->name == NULL) {
- irq_free_descs(trig->subirq_base,
- CONFIG_IIO_CONSUMERS_PER_TRIGGER);
- kfree(trig);
- return NULL;
- }
- trig->subirq_chip.name = trig->name;
- trig->subirq_chip.irq_mask = &iio_trig_subirqmask;
- trig->subirq_chip.irq_unmask = &iio_trig_subirqunmask;
- for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++) {
- irq_set_chip(trig->subirq_base + i,
- &trig->subirq_chip);
- irq_set_handler(trig->subirq_base + i,
- &handle_simple_irq);
- irq_modify_status(trig->subirq_base + i,
- IRQ_NOREQUEST | IRQ_NOAUTOEN,
- IRQ_NOPROBE);
- }
- get_device(&trig->dev);
+ trig->dev.type = &iio_trig_type;
+ trig->dev.bus = &iio_bus_type;
+ device_initialize(&trig->dev);
+
+ mutex_init(&trig->pool_lock);
+ trig->subirq_base = irq_alloc_descs(-1, 0,
+ CONFIG_IIO_CONSUMERS_PER_TRIGGER,
+ 0);
+ if (trig->subirq_base < 0)
+ goto free_trig;
+
+ trig->name = kvasprintf(GFP_KERNEL, fmt, vargs);
+ if (trig->name == NULL)
+ goto free_descs;
+
+ trig->subirq_chip.name = trig->name;
+ trig->subirq_chip.irq_mask = &iio_trig_subirqmask;
+ trig->subirq_chip.irq_unmask = &iio_trig_subirqunmask;
+ for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++) {
+ irq_set_chip(trig->subirq_base + i, &trig->subirq_chip);
+ irq_set_handler(trig->subirq_base + i, &handle_simple_irq);
+ irq_modify_status(trig->subirq_base + i,
+ IRQ_NOREQUEST | IRQ_NOAUTOEN, IRQ_NOPROBE);
}
+ get_device(&trig->dev);
return trig;
+
+free_descs:
+ irq_free_descs(trig->subirq_base, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
+free_trig:
+ kfree(trig);
+ return NULL;
}
struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
scale_type = iio_channel_read(chan, &scale_val, &scale_val2,
IIO_CHAN_INFO_SCALE);
- if (scale_type < 0)
- return scale_type;
+ if (scale_type < 0) {
+ /*
+ * Just pass raw values as processed if no scaling is
+ * available.
+ */
+ *processed = raw;
+ return 0;
+ }
switch (scale_type) {
case IIO_VAL_INT:
return 0;
}
-static int cm3605_pm_suspend(struct device *dev)
+static int __maybe_unused cm3605_pm_suspend(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct cm3605 *cm3605 = iio_priv(indio_dev);
return 0;
}
-static int cm3605_pm_resume(struct device *dev)
+static int __maybe_unused cm3605_pm_resume(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct cm3605 *cm3605 = iio_priv(indio_dev);
{ .compatible = "ti,opt3001" },
{ }
};
+MODULE_DEVICE_TABLE(of, opt3001_of_match);
static struct i2c_driver opt3001_driver = {
.probe = opt3001_probe,
if (val & AK8974_STATUS_DRDY)
return 0;
} while (--timeout);
- if (!timeout) {
- dev_err(&ak8974->i2c->dev,
- "timeout waiting for DRDY\n");
- return -ETIMEDOUT;
- }
- return 0;
+ dev_err(&ak8974->i2c->dev, "timeout waiting for DRDY\n");
+ return -ETIMEDOUT;
}
static int ak8974_getresult(struct ak8974 *ak8974, __le16 *result)
int val, int val2, long mask)
{
struct mag3110_data *data = iio_priv(indio_dev);
- int rate;
+ int rate, ret;
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
rate = mag3110_get_samp_freq_index(data, val, val2);
- if (rate < 0)
- return -EINVAL;
+ if (rate < 0) {
+ ret = -EINVAL;
+ break;
+ }
data->ctrl_reg1 &= ~MAG3110_CTRL_DR_MASK;
data->ctrl_reg1 |= rate << MAG3110_CTRL_DR_SHIFT;
- return i2c_smbus_write_byte_data(data->client,
+ ret = i2c_smbus_write_byte_data(data->client,
MAG3110_CTRL_REG1, data->ctrl_reg1);
+ break;
case IIO_CHAN_INFO_CALIBBIAS:
- if (val < -10000 || val > 10000)
- return -EINVAL;
- return i2c_smbus_write_word_swapped(data->client,
+ if (val < -10000 || val > 10000) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = i2c_smbus_write_word_swapped(data->client,
MAG3110_OFF_X + 2 * chan->scan_index, val << 1);
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
}
static irqreturn_t mag3110_trigger_handler(int irq, void *p)
MCP4531_COMPATIBLE("microchip,mcp4662-104", MCP466x_104),
{ /* sentinel */ }
};
+MODULE_DEVICE_TABLE(of, mcp4531_of_match);
#endif
static int mcp4531_probe(struct i2c_client *client,
{
struct ms5611_state *st = iio_priv(indio_dev);
const struct ms5611_osr *osr = NULL;
+ int ret;
if (mask != IIO_CHAN_INFO_OVERSAMPLING_RATIO)
return -EINVAL;
if (!osr)
return -EINVAL;
- mutex_lock(&st->lock);
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
- if (iio_buffer_enabled(indio_dev)) {
- mutex_unlock(&st->lock);
- return -EBUSY;
- }
+ mutex_lock(&st->lock);
if (chan->type == IIO_TEMP)
st->temp_osr = osr;
st->pressure_osr = osr;
mutex_unlock(&st->lock);
+ iio_device_release_direct_mode(indio_dev);
+
return 0;
}
int *val, int *val2, long mask)
{
struct sx9500_data *data = iio_priv(indio_dev);
+ int ret;
switch (chan->type) {
case IIO_PROXIMITY:
switch (mask) {
case IIO_CHAN_INFO_RAW:
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
- return sx9500_read_proximity(data, chan, val);
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = sx9500_read_proximity(data, chan, val);
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
case IIO_CHAN_INFO_SAMP_FREQ:
return sx9500_read_samp_freq(data, val, val2);
default:
This driver can also be built as a module. If so, the module will
be called tmp006.
+config TMP007
+ tristate "TMP007 infrared thermopile sensor with Integrated Math Engine"
+ depends on I2C
+ help
+ If you say yes here you get support for the Texas Instruments
+ TMP007 infrared thermopile sensor with Integrated Math Engine.
+
+ This driver can also be built as a module. If so, the module will
+ be called tmp007.
+
config TSYS01
tristate "Measurement Specialties TSYS01 temperature sensor using I2C bus connection"
depends on I2C
obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o
obj-$(CONFIG_MLX90614) += mlx90614.o
obj-$(CONFIG_TMP006) += tmp006.o
+obj-$(CONFIG_TMP007) += tmp007.o
obj-$(CONFIG_TSYS01) += tsys01.o
obj-$(CONFIG_TSYS02D) += tsys02d.o
--- /dev/null
+/*
+ * tmp007.c - Support for TI TMP007 IR thermopile sensor with integrated math engine
+ *
+ * Copyright (c) 2017 Manivannan Sadhasivam <manivannanece23@gmail.com>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Driver for the Texas Instruments I2C 16-bit IR thermopile sensor
+ *
+ * (7-bit I2C slave address (0x40 - 0x47), changeable via ADR pins)
+ *
+ * Note: This driver assumes that the sensor has been calibrated beforehand
+ *
+ * TODO: ALERT irq, limit threshold events
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/of.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define TMP007_TDIE 0x01
+#define TMP007_CONFIG 0x02
+#define TMP007_TOBJECT 0x03
+#define TMP007_STATUS 0x04
+#define TMP007_STATUS_MASK 0x05
+#define TMP007_MANUFACTURER_ID 0x1e
+#define TMP007_DEVICE_ID 0x1f
+
+#define TMP007_CONFIG_CONV_EN BIT(12)
+#define TMP007_CONFIG_COMP_EN BIT(5)
+#define TMP007_CONFIG_TC_EN BIT(6)
+#define TMP007_CONFIG_CR_MASK GENMASK(11, 9)
+#define TMP007_CONFIG_CR_SHIFT 9
+
+#define TMP007_STATUS_CONV_READY BIT(14)
+#define TMP007_STATUS_DATA_VALID BIT(9)
+
+#define TMP007_MANUFACTURER_MAGIC 0x5449
+#define TMP007_DEVICE_MAGIC 0x0078
+
+#define TMP007_TEMP_SHIFT 2
+
+struct tmp007_data {
+ struct i2c_client *client;
+ u16 config;
+};
+
+static const int tmp007_avgs[5][2] = { {4, 0}, {2, 0}, {1, 0},
+ {0, 500000}, {0, 250000} };
+
+static int tmp007_read_temperature(struct tmp007_data *data, u8 reg)
+{
+ s32 ret;
+ int tries = 50;
+
+ while (tries-- > 0) {
+ ret = i2c_smbus_read_word_swapped(data->client,
+ TMP007_STATUS);
+ if (ret < 0)
+ return ret;
+ if ((ret & TMP007_STATUS_CONV_READY) &&
+ !(ret & TMP007_STATUS_DATA_VALID))
+ break;
+ msleep(100);
+ }
+
+ if (tries < 0)
+ return -EIO;
+
+ return i2c_smbus_read_word_swapped(data->client, reg);
+}
+
+static int tmp007_powerdown(struct tmp007_data *data)
+{
+ return i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG,
+ data->config & ~TMP007_CONFIG_CONV_EN);
+}
+
+static int tmp007_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *channel, int *val,
+ int *val2, long mask)
+{
+ struct tmp007_data *data = iio_priv(indio_dev);
+ s32 ret;
+ int conv_rate;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (channel->channel2) {
+ case IIO_MOD_TEMP_AMBIENT: /* LSB: 0.03125 degree Celsius */
+ ret = i2c_smbus_read_word_swapped(data->client, TMP007_TDIE);
+ if (ret < 0)
+ return ret;
+ break;
+ case IIO_MOD_TEMP_OBJECT:
+ ret = tmp007_read_temperature(data, TMP007_TOBJECT);
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *val = sign_extend32(ret, 15) >> TMP007_TEMP_SHIFT;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 31;
+ *val2 = 250000;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ conv_rate = (data->config & TMP007_CONFIG_CR_MASK)
+ >> TMP007_CONFIG_CR_SHIFT;
+ *val = tmp007_avgs[conv_rate][0];
+ *val2 = tmp007_avgs[conv_rate][1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int tmp007_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *channel, int val,
+ int val2, long mask)
+{
+ struct tmp007_data *data = iio_priv(indio_dev);
+ int i;
+ u16 tmp;
+
+ if (mask == IIO_CHAN_INFO_SAMP_FREQ) {
+ for (i = 0; i < ARRAY_SIZE(tmp007_avgs); i++) {
+ if ((val == tmp007_avgs[i][0]) &&
+ (val2 == tmp007_avgs[i][1])) {
+ tmp = data->config & ~TMP007_CONFIG_CR_MASK;
+ tmp |= (i << TMP007_CONFIG_CR_SHIFT);
+
+ return i2c_smbus_write_word_swapped(data->client,
+ TMP007_CONFIG,
+ data->config = tmp);
+ }
+ }
+ }
+
+ return -EINVAL;
+}
+
+static IIO_CONST_ATTR(sampling_frequency_available, "4 2 1 0.5 0.25");
+
+static struct attribute *tmp007_attributes[] = {
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group tmp007_attribute_group = {
+ .attrs = tmp007_attributes,
+};
+
+static const struct iio_chan_spec tmp007_channels[] = {
+ {
+ .type = IIO_TEMP,
+ .modified = 1,
+ .channel2 = IIO_MOD_TEMP_AMBIENT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ },
+ {
+ .type = IIO_TEMP,
+ .modified = 1,
+ .channel2 = IIO_MOD_TEMP_OBJECT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ }
+};
+
+static const struct iio_info tmp007_info = {
+ .read_raw = tmp007_read_raw,
+ .write_raw = tmp007_write_raw,
+ .attrs = &tmp007_attribute_group,
+ .driver_module = THIS_MODULE,
+};
+
+static bool tmp007_identify(struct i2c_client *client)
+{
+ int manf_id, dev_id;
+
+ manf_id = i2c_smbus_read_word_swapped(client, TMP007_MANUFACTURER_ID);
+ if (manf_id < 0)
+ return false;
+
+ dev_id = i2c_smbus_read_word_swapped(client, TMP007_DEVICE_ID);
+ if (dev_id < 0)
+ return false;
+
+ return (manf_id == TMP007_MANUFACTURER_MAGIC && dev_id == TMP007_DEVICE_MAGIC);
+}
+
+static int tmp007_probe(struct i2c_client *client,
+ const struct i2c_device_id *tmp007_id)
+{
+ struct tmp007_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+ u16 status;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
+ return -EOPNOTSUPP;
+
+ if (!tmp007_identify(client)) {
+ dev_err(&client->dev, "TMP007 not found\n");
+ return -ENODEV;
+ }
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->name = dev_name(&client->dev);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &tmp007_info;
+
+ indio_dev->channels = tmp007_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tmp007_channels);
+
+ /*
+ * Set Configuration register:
+ * 1. Conversion ON
+ * 2. Comparator mode
+ * 3. Transient correction enable
+ */
+
+ ret = i2c_smbus_read_word_swapped(data->client, TMP007_CONFIG);
+ if (ret < 0)
+ return ret;
+
+ data->config = ret;
+ data->config |= (TMP007_CONFIG_CONV_EN | TMP007_CONFIG_COMP_EN | TMP007_CONFIG_TC_EN);
+
+ ret = i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG,
+ data->config);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Set Status Mask register:
+ * 1. Conversion ready enable
+ * 2. Data valid enable
+ */
+
+ ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS_MASK);
+ if (ret < 0)
+ goto error_powerdown;
+
+ status = ret;
+ status |= (TMP007_STATUS_CONV_READY | TMP007_STATUS_DATA_VALID);
+
+ ret = i2c_smbus_write_word_swapped(data->client, TMP007_STATUS_MASK, status);
+ if (ret < 0)
+ goto error_powerdown;
+
+ return iio_device_register(indio_dev);
+
+error_powerdown:
+ tmp007_powerdown(data);
+
+ return ret;
+}
+
+static int tmp007_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct tmp007_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ tmp007_powerdown(data);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tmp007_suspend(struct device *dev)
+{
+ struct tmp007_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+
+ return tmp007_powerdown(data);
+}
+
+static int tmp007_resume(struct device *dev)
+{
+ struct tmp007_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+
+ return i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG,
+ data->config | TMP007_CONFIG_CONV_EN);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tmp007_pm_ops, tmp007_suspend, tmp007_resume);
+
+static const struct of_device_id tmp007_of_match[] = {
+ { .compatible = "ti,tmp007", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tmp007_of_match);
+
+static const struct i2c_device_id tmp007_id[] = {
+ { "tmp007", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tmp007_id);
+
+static struct i2c_driver tmp007_driver = {
+ .driver = {
+ .name = "tmp007",
+ .of_match_table = of_match_ptr(tmp007_of_match),
+ .pm = &tmp007_pm_ops,
+ },
+ .probe = tmp007_probe,
+ .remove = tmp007_remove,
+ .id_table = tmp007_id,
+};
+module_i2c_driver(tmp007_driver);
+
+MODULE_AUTHOR("Manivannan Sadhasivam <manivannanece23@gmail.com>");
+MODULE_DESCRIPTION("TI TMP007 IR thermopile sensor driver");
+MODULE_LICENSE("GPL");
trig_info = kzalloc(sizeof(*trig_info), GFP_KERNEL);
if (!trig_info) {
ret = -ENOMEM;
- goto error_put_trigger;
+ goto error_free_trigger;
}
iio_trigger_set_drvdata(trig, trig_info);
trig_info->irq = irq;
free_irq(irq, trig);
error_free_trig_info:
kfree(trig_info);
-error_put_trigger:
- iio_trigger_put(trig);
+error_free_trigger:
+ iio_trigger_free(trig);
error_ret:
return ret;
}
iio_trigger_unregister(trig);
free_irq(trig_info->irq, trig);
kfree(trig_info);
- iio_trigger_put(trig);
+ iio_trigger_free(trig);
return 0;
}
return 0;
out2:
- iio_trigger_put(t->trig);
+ iio_trigger_free(t->trig);
free_t:
kfree(t);
out1:
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
+#include <linux/pm_runtime.h>
#define ISL29028_CONV_TIME_MS 100
#define ISL29028_NUM_REGS (ISL29028_REG_TEST2_MODE + 1)
+#define ISL29028_POWER_OFF_DELAY_MS 2000
+
enum isl29028_als_ir_mode {
ISL29028_MODE_NONE = 0,
ISL29028_MODE_ALS,
};
struct isl29028_chip {
- struct mutex lock;
- struct regmap *regmap;
-
- unsigned int prox_sampling;
- bool enable_prox;
-
- int lux_scale;
+ struct mutex lock;
+ struct regmap *regmap;
+ unsigned int prox_sampling;
+ bool enable_prox;
+ int lux_scale;
enum isl29028_als_ir_mode als_ir_mode;
};
static int isl29028_set_proxim_sampling(struct isl29028_chip *chip,
unsigned int sampling)
{
+ struct device *dev = regmap_get_device(chip->regmap);
static unsigned int prox_period[] = {800, 400, 200, 100, 75, 50, 12, 0};
- int sel;
unsigned int period = DIV_ROUND_UP(1000, sampling);
+ int sel, ret;
for (sel = 0; sel < ARRAY_SIZE(prox_period); ++sel) {
if (period >= prox_period[sel])
break;
}
- return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
- ISL29028_CONF_PROX_SLP_MASK,
- sel << ISL29028_CONF_PROX_SLP_SH);
+
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_PROX_SLP_MASK,
+ sel << ISL29028_CONF_PROX_SLP_SH);
+
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d setting the proximity sampling\n",
+ __func__, ret);
+ return ret;
+ }
+
+ chip->prox_sampling = sampling;
+
+ return ret;
}
-static int isl29028_enable_proximity(struct isl29028_chip *chip, bool enable)
+static int isl29028_enable_proximity(struct isl29028_chip *chip)
{
int ret;
- int val = 0;
- if (enable)
- val = ISL29028_CONF_PROX_EN;
+ ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling);
+ if (ret < 0)
+ return ret;
+
ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
- ISL29028_CONF_PROX_EN_MASK, val);
+ ISL29028_CONF_PROX_EN_MASK,
+ ISL29028_CONF_PROX_EN);
if (ret < 0)
return ret;
/* Wait for conversion to be complete for first sample */
mdelay(DIV_ROUND_UP(1000, chip->prox_sampling));
+
return 0;
}
static int isl29028_set_als_scale(struct isl29028_chip *chip, int lux_scale)
{
+ struct device *dev = regmap_get_device(chip->regmap);
int val = (lux_scale == 2000) ? ISL29028_CONF_ALS_RANGE_HIGH_LUX :
ISL29028_CONF_ALS_RANGE_LOW_LUX;
+ int ret;
- return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
- ISL29028_CONF_ALS_RANGE_MASK, val);
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_RANGE_MASK, val);
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d setting the ALS scale\n", __func__,
+ ret);
+ return ret;
+ }
+
+ chip->lux_scale = lux_scale;
+
+ return ret;
}
static int isl29028_set_als_ir_mode(struct isl29028_chip *chip,
enum isl29028_als_ir_mode mode)
{
- int ret = 0;
+ int ret;
if (chip->als_ir_mode == mode)
return 0;
+ ret = isl29028_set_als_scale(chip, chip->lux_scale);
+ if (ret < 0)
+ return ret;
+
switch (mode) {
case ISL29028_MODE_ALS:
ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
ISL29028_CONF_ALS_RANGE_MASK,
ISL29028_CONF_ALS_RANGE_HIGH_LUX);
break;
-
case ISL29028_MODE_IR:
ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
ISL29028_CONF_ALS_IR_MODE_MASK,
ISL29028_CONF_ALS_IR_MODE_IR);
break;
-
case ISL29028_MODE_NONE:
return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
- ISL29028_CONF_ALS_EN_MASK, ISL29028_CONF_ALS_DIS);
+ ISL29028_CONF_ALS_EN_MASK,
+ ISL29028_CONF_ALS_DIS);
}
if (ret < 0)
ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_L, &lsb);
if (ret < 0) {
dev_err(dev,
- "Error in reading register ALSIR_L err %d\n", ret);
+ "%s(): Error %d reading register ALSIR_L\n",
+ __func__, ret);
return ret;
}
ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_U, &msb);
if (ret < 0) {
dev_err(dev,
- "Error in reading register ALSIR_U err %d\n", ret);
+ "%s(): Error %d reading register ALSIR_U\n",
+ __func__, ret);
return ret;
}
*als_ir = ((msb & 0xF) << 8) | (lsb & 0xFF);
+
return 0;
}
unsigned int data;
int ret;
+ if (!chip->enable_prox) {
+ ret = isl29028_enable_proximity(chip);
+ if (ret < 0)
+ return ret;
+
+ chip->enable_prox = true;
+ }
+
ret = regmap_read(chip->regmap, ISL29028_REG_PROX_DATA, &data);
if (ret < 0) {
- dev_err(dev, "Error in reading register %d, error %d\n",
- ISL29028_REG_PROX_DATA, ret);
+ dev_err(dev, "%s(): Error %d reading register PROX_DATA\n",
+ __func__, ret);
return ret;
}
- *prox = data;
- return 0;
-}
-static int isl29028_proxim_get(struct isl29028_chip *chip, int *prox_data)
-{
- int ret;
+ *prox = data;
- if (!chip->enable_prox) {
- ret = isl29028_enable_proximity(chip, true);
- if (ret < 0)
- return ret;
- chip->enable_prox = true;
- }
- return isl29028_read_proxim(chip, prox_data);
+ return 0;
}
static int isl29028_als_get(struct isl29028_chip *chip, int *als_data)
ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_ALS);
if (ret < 0) {
- dev_err(dev, "Error in enabling ALS mode err %d\n", ret);
+ dev_err(dev, "%s(): Error %d enabling ALS mode\n", __func__,
+ ret);
return ret;
}
als_ir_data = (als_ir_data * 49) / 100;
*als_data = als_ir_data;
+
return 0;
}
ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_IR);
if (ret < 0) {
- dev_err(dev, "Error in enabling IR mode err %d\n", ret);
+ dev_err(dev, "%s(): Error %d enabling IR mode\n", __func__,
+ ret);
return ret;
}
+
return isl29028_read_als_ir(chip, ir_data);
}
+static int isl29028_set_pm_runtime_busy(struct isl29028_chip *chip, bool on)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret;
+
+ if (on) {
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ pm_runtime_put_noidle(dev);
+ } else {
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+ }
+
+ return ret;
+}
+
/* Channel IO */
static int isl29028_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
{
struct isl29028_chip *chip = iio_priv(indio_dev);
struct device *dev = regmap_get_device(chip->regmap);
- int ret = -EINVAL;
+ int ret;
+
+ ret = isl29028_set_pm_runtime_busy(chip, true);
+ if (ret < 0)
+ return ret;
mutex_lock(&chip->lock);
+
+ ret = -EINVAL;
switch (chan->type) {
case IIO_PROXIMITY:
if (mask != IIO_CHAN_INFO_SAMP_FREQ) {
dev_err(dev,
- "proximity: mask value 0x%08lx not supported\n",
- mask);
+ "%s(): proximity: Mask value 0x%08lx is not supported\n",
+ __func__, mask);
break;
}
+
if (val < 1 || val > 100) {
dev_err(dev,
- "Samp_freq %d is not in range[1:100]\n", val);
+ "%s(): proximity: Sampling frequency %d is not in the range [1:100]\n",
+ __func__, val);
break;
}
+
ret = isl29028_set_proxim_sampling(chip, val);
- if (ret < 0) {
- dev_err(dev,
- "Setting proximity samp_freq fail, err %d\n",
- ret);
- break;
- }
- chip->prox_sampling = val;
break;
-
case IIO_LIGHT:
if (mask != IIO_CHAN_INFO_SCALE) {
dev_err(dev,
- "light: mask value 0x%08lx not supported\n",
- mask);
+ "%s(): light: Mask value 0x%08lx is not supported\n",
+ __func__, mask);
break;
}
- if ((val != 125) && (val != 2000)) {
+
+ if (val != 125 && val != 2000) {
dev_err(dev,
- "lux scale %d is invalid [125, 2000]\n", val);
+ "%s(): light: Lux scale %d is not in the set {125, 2000}\n",
+ __func__, val);
break;
}
+
ret = isl29028_set_als_scale(chip, val);
- if (ret < 0) {
- dev_err(dev,
- "Setting lux scale fail with error %d\n", ret);
- break;
- }
- chip->lux_scale = val;
break;
-
default:
- dev_err(dev, "Unsupported channel type\n");
+ dev_err(dev, "%s(): Unsupported channel type %x\n",
+ __func__, chan->type);
break;
}
+
mutex_unlock(&chip->lock);
+
+ if (ret < 0)
+ return ret;
+
+ ret = isl29028_set_pm_runtime_busy(chip, false);
+ if (ret < 0)
+ return ret;
+
return ret;
}
{
struct isl29028_chip *chip = iio_priv(indio_dev);
struct device *dev = regmap_get_device(chip->regmap);
- int ret = -EINVAL;
+ int ret, pm_ret;
+
+ ret = isl29028_set_pm_runtime_busy(chip, true);
+ if (ret < 0)
+ return ret;
mutex_lock(&chip->lock);
+
+ ret = -EINVAL;
switch (mask) {
case IIO_CHAN_INFO_RAW:
case IIO_CHAN_INFO_PROCESSED:
ret = isl29028_ir_get(chip, val);
break;
case IIO_PROXIMITY:
- ret = isl29028_proxim_get(chip, val);
+ ret = isl29028_read_proxim(chip, val);
break;
default:
break;
}
+
if (ret < 0)
break;
+
ret = IIO_VAL_INT;
break;
-
case IIO_CHAN_INFO_SAMP_FREQ:
if (chan->type != IIO_PROXIMITY)
break;
+
*val = chip->prox_sampling;
ret = IIO_VAL_INT;
break;
-
case IIO_CHAN_INFO_SCALE:
if (chan->type != IIO_LIGHT)
break;
*val = chip->lux_scale;
ret = IIO_VAL_INT;
break;
-
default:
- dev_err(dev, "mask value 0x%08lx not supported\n", mask);
+ dev_err(dev, "%s(): mask value 0x%08lx is not supported\n",
+ __func__, mask);
break;
}
+
mutex_unlock(&chip->lock);
+
+ if (ret < 0)
+ return ret;
+
+ /**
+ * Preserve the ret variable if the call to
+ * isl29028_set_pm_runtime_busy() is successful so the reading
+ * (if applicable) is returned to user space.
+ */
+ pm_ret = isl29028_set_pm_runtime_busy(chip, false);
+ if (pm_ret < 0)
+ return pm_ret;
+
return ret;
}
"1 3 5 10 13 20 83 100");
static IIO_CONST_ATTR(in_illuminance_scale_available, "125 2000");
-#define ISL29028_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr)
#define ISL29028_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr)
static struct attribute *isl29028_attributes[] = {
ISL29028_CONST_ATTR(in_proximity_sampling_frequency_available),
.write_raw = isl29028_write_raw,
};
-static int isl29028_chip_init_and_power_on(struct isl29028_chip *chip)
+static int isl29028_clear_configure_reg(struct isl29028_chip *chip)
{
struct device *dev = regmap_get_device(chip->regmap);
int ret;
ret = regmap_write(chip->regmap, ISL29028_REG_CONFIGURE, 0x0);
- if (ret < 0) {
- dev_err(dev, "%s(): write to reg %d failed, err = %d\n",
- __func__, ISL29028_REG_CONFIGURE, ret);
- return ret;
- }
+ if (ret < 0)
+ dev_err(dev, "%s(): Error %d clearing the CONFIGURE register\n",
+ __func__, ret);
- ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling);
- if (ret < 0) {
- dev_err(dev, "setting the proximity, err = %d\n", ret);
- return ret;
- }
+ chip->als_ir_mode = ISL29028_MODE_NONE;
+ chip->enable_prox = false;
- ret = isl29028_set_als_scale(chip, chip->lux_scale);
- if (ret < 0)
- dev_err(dev, "setting als scale failed, err = %d\n", ret);
return ret;
}
int ret;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
- if (!indio_dev) {
- dev_err(&client->dev, "iio allocation fails\n");
+ if (!indio_dev)
return -ENOMEM;
- }
chip = iio_priv(indio_dev);
chip->regmap = devm_regmap_init_i2c(client, &isl29028_regmap_config);
if (IS_ERR(chip->regmap)) {
ret = PTR_ERR(chip->regmap);
- dev_err(&client->dev, "regmap initialization failed: %d\n",
- ret);
+ dev_err(&client->dev, "%s: Error %d initializing regmap\n",
+ __func__, ret);
return ret;
}
chip->enable_prox = false;
chip->prox_sampling = 20;
chip->lux_scale = 2000;
- chip->als_ir_mode = ISL29028_MODE_NONE;
ret = regmap_write(chip->regmap, ISL29028_REG_TEST1_MODE, 0x0);
if (ret < 0) {
dev_err(&client->dev,
- "%s(): write to reg %d failed, err = %d\n", __func__,
- ISL29028_REG_TEST1_MODE, ret);
+ "%s(): Error %d writing to TEST1_MODE register\n",
+ __func__, ret);
return ret;
}
+
ret = regmap_write(chip->regmap, ISL29028_REG_TEST2_MODE, 0x0);
if (ret < 0) {
dev_err(&client->dev,
- "%s(): write to reg %d failed, err = %d\n", __func__,
- ISL29028_REG_TEST2_MODE, ret);
+ "%s(): Error %d writing to TEST2_MODE register\n",
+ __func__, ret);
return ret;
}
- ret = isl29028_chip_init_and_power_on(chip);
- if (ret < 0) {
- dev_err(&client->dev, "chip initialization failed: %d\n", ret);
+ ret = isl29028_clear_configure_reg(chip);
+ if (ret < 0)
return ret;
- }
indio_dev->info = &isl29028_info;
indio_dev->channels = isl29028_channels;
indio_dev->name = id->name;
indio_dev->dev.parent = &client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ ISL29028_POWER_OFF_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
if (ret < 0) {
dev_err(&client->dev,
- "iio registration fails with error %d\n",
- ret);
+ "%s(): iio registration failed with error %d\n",
+ __func__, ret);
return ret;
}
+
return 0;
}
+static int isl29028_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct isl29028_chip *chip = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ return isl29028_clear_configure_reg(chip);
+}
+
+static int __maybe_unused isl29028_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct isl29028_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ ret = isl29028_clear_configure_reg(chip);
+
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int __maybe_unused isl29028_resume(struct device *dev)
+{
+ /**
+ * The specific component (ALS/IR or proximity) will enable itself as
+ * needed the next time that the user requests a reading. This is done
+ * above in isl29028_set_als_ir_mode() and isl29028_enable_proximity().
+ */
+ return 0;
+}
+
+static const struct dev_pm_ops isl29028_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(isl29028_suspend, isl29028_resume)
+ SET_RUNTIME_PM_OPS(isl29028_suspend, isl29028_resume, NULL)
+};
+
static const struct i2c_device_id isl29028_id[] = {
{"isl29028", 0},
{}
static struct i2c_driver isl29028_driver = {
.driver = {
.name = "isl29028",
+ .pm = &isl29028_pm_ops,
.of_match_table = isl29028_of_match,
},
.probe = isl29028_probe,
+ .remove = isl29028_remove,
.id_table = isl29028_id,
};
out1:
iio_trigger_unregister(st->trig);
out:
- iio_trigger_put(st->trig);
+ iio_trigger_free(st->trig);
return ret;
}
peripheral_free(st->t->pin);
free_irq(st->irq, st);
iio_trigger_unregister(st->trig);
- iio_trigger_put(st->trig);
+ iio_trigger_free(st->trig);
return 0;
}
git.samba.org / sfrench / cifs-2.6.git / commitdiff