return 0;
}
-static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
- unsigned long *configs, unsigned num_configs)
+static int meson_pinconf_set_gpio_bit(struct meson_pinctrl *pc,
+ unsigned int pin,
+ unsigned int reg_type,
+ bool arg)
{
- struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
struct meson_bank *bank;
- enum pin_config_param param;
unsigned int reg, bit;
- int i, ret;
+ int ret;
+
+ ret = meson_get_bank(pc, pin, &bank);
+ if (ret)
+ return ret;
+
+ meson_calc_reg_and_bit(bank, pin, reg_type, ®, &bit);
+ return regmap_update_bits(pc->reg_gpio, reg, BIT(bit),
+ arg ? BIT(bit) : 0);
+}
+
+static int meson_pinconf_get_gpio_bit(struct meson_pinctrl *pc,
+ unsigned int pin,
+ unsigned int reg_type)
+{
+ struct meson_bank *bank;
+ unsigned int reg, bit, val;
+ int ret;
ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
+ meson_calc_reg_and_bit(bank, pin, reg_type, ®, &bit);
+ ret = regmap_read(pc->reg_gpio, reg, &val);
+ if (ret)
+ return ret;
+
+ return BIT(bit) & val ? 1 : 0;
+}
+
+static int meson_pinconf_set_output(struct meson_pinctrl *pc,
+ unsigned int pin,
+ bool out)
+{
+ return meson_pinconf_set_gpio_bit(pc, pin, REG_DIR, !out);
+}
+
+static int meson_pinconf_get_output(struct meson_pinctrl *pc,
+ unsigned int pin)
+{
+ int ret = meson_pinconf_get_gpio_bit(pc, pin, REG_DIR);
+
+ if (ret < 0)
+ return ret;
+
+ return !ret;
+}
+
+static int meson_pinconf_set_drive(struct meson_pinctrl *pc,
+ unsigned int pin,
+ bool high)
+{
+ return meson_pinconf_set_gpio_bit(pc, pin, REG_OUT, high);
+}
+
+static int meson_pinconf_get_drive(struct meson_pinctrl *pc,
+ unsigned int pin)
+{
+ return meson_pinconf_get_gpio_bit(pc, pin, REG_OUT);
+}
+
+static int meson_pinconf_set_output_drive(struct meson_pinctrl *pc,
+ unsigned int pin,
+ bool high)
+{
+ int ret;
+
+ ret = meson_pinconf_set_output(pc, pin, true);
+ if (ret)
+ return ret;
+
+ return meson_pinconf_set_drive(pc, pin, high);
+}
+
+static int meson_pinconf_disable_bias(struct meson_pinctrl *pc,
+ unsigned int pin)
+{
+ struct meson_bank *bank;
+ unsigned int reg, bit = 0;
+ int ret;
+
+ ret = meson_get_bank(pc, pin, &bank);
+ if (ret)
+ return ret;
+
+ meson_calc_reg_and_bit(bank, pin, REG_PULLEN, ®, &bit);
+ ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), 0);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int meson_pinconf_enable_bias(struct meson_pinctrl *pc, unsigned int pin,
+ bool pull_up)
+{
+ struct meson_bank *bank;
+ unsigned int reg, bit, val = 0;
+ int ret;
+
+ ret = meson_get_bank(pc, pin, &bank);
+ if (ret)
+ return ret;
+
+ meson_calc_reg_and_bit(bank, pin, REG_PULL, ®, &bit);
+ if (pull_up)
+ val = BIT(bit);
+
+ ret = regmap_update_bits(pc->reg_pull, reg, BIT(bit), val);
+ if (ret)
+ return ret;
+
+ meson_calc_reg_and_bit(bank, pin, REG_PULLEN, ®, &bit);
+ ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), BIT(bit));
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int meson_pinconf_set_drive_strength(struct meson_pinctrl *pc,
+ unsigned int pin,
+ u16 drive_strength_ua)
+{
+ struct meson_bank *bank;
+ unsigned int reg, bit, ds_val;
+ int ret;
+
+ if (!pc->reg_ds) {
+ dev_err(pc->dev, "drive-strength not supported\n");
+ return -ENOTSUPP;
+ }
+
+ ret = meson_get_bank(pc, pin, &bank);
+ if (ret)
+ return ret;
+
+ meson_calc_reg_and_bit(bank, pin, REG_DS, ®, &bit);
+ bit = bit << 1;
+
+ if (drive_strength_ua <= 500) {
+ ds_val = MESON_PINCONF_DRV_500UA;
+ } else if (drive_strength_ua <= 2500) {
+ ds_val = MESON_PINCONF_DRV_2500UA;
+ } else if (drive_strength_ua <= 3000) {
+ ds_val = MESON_PINCONF_DRV_3000UA;
+ } else if (drive_strength_ua <= 4000) {
+ ds_val = MESON_PINCONF_DRV_4000UA;
+ } else {
+ dev_warn_once(pc->dev,
+ "pin %u: invalid drive-strength : %d , default to 4mA\n",
+ pin, drive_strength_ua);
+ ds_val = MESON_PINCONF_DRV_4000UA;
+ }
+
+ ret = regmap_update_bits(pc->reg_ds, reg, 0x3 << bit, ds_val << bit);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
+ unsigned long *configs, unsigned num_configs)
+{
+ struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
+ enum pin_config_param param;
+ unsigned int arg = 0;
+ int i, ret;
+
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
+ switch (param) {
+ case PIN_CONFIG_DRIVE_STRENGTH_UA:
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ case PIN_CONFIG_OUTPUT:
+ arg = pinconf_to_config_argument(configs[i]);
+ break;
+
+ default:
+ break;
+ }
+
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- dev_dbg(pc->dev, "pin %u: disable bias\n", pin);
-
- meson_calc_reg_and_bit(bank, pin, REG_PULLEN, ®,
- &bit);
- ret = regmap_update_bits(pc->reg_pullen, reg,
- BIT(bit), 0);
- if (ret)
- return ret;
+ ret = meson_pinconf_disable_bias(pc, pin);
break;
case PIN_CONFIG_BIAS_PULL_UP:
- dev_dbg(pc->dev, "pin %u: enable pull-up\n", pin);
-
- meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
- ®, &bit);
- ret = regmap_update_bits(pc->reg_pullen, reg,
- BIT(bit), BIT(bit));
- if (ret)
- return ret;
-
- meson_calc_reg_and_bit(bank, pin, REG_PULL, ®, &bit);
- ret = regmap_update_bits(pc->reg_pull, reg,
- BIT(bit), BIT(bit));
- if (ret)
- return ret;
+ ret = meson_pinconf_enable_bias(pc, pin, true);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
- dev_dbg(pc->dev, "pin %u: enable pull-down\n", pin);
-
- meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
- ®, &bit);
- ret = regmap_update_bits(pc->reg_pullen, reg,
- BIT(bit), BIT(bit));
- if (ret)
- return ret;
-
- meson_calc_reg_and_bit(bank, pin, REG_PULL, ®, &bit);
- ret = regmap_update_bits(pc->reg_pull, reg,
- BIT(bit), 0);
- if (ret)
- return ret;
+ ret = meson_pinconf_enable_bias(pc, pin, false);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH_UA:
+ ret = meson_pinconf_set_drive_strength(pc, pin, arg);
+ break;
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ ret = meson_pinconf_set_output(pc, pin, arg);
+ break;
+ case PIN_CONFIG_OUTPUT:
+ ret = meson_pinconf_set_output_drive(pc, pin, arg);
break;
default:
- return -ENOTSUPP;
+ ret = -ENOTSUPP;
}
+
+ if (ret)
+ return ret;
}
return 0;
return conf;
}
+static int meson_pinconf_get_drive_strength(struct meson_pinctrl *pc,
+ unsigned int pin,
+ u16 *drive_strength_ua)
+{
+ struct meson_bank *bank;
+ unsigned int reg, bit;
+ unsigned int val;
+ int ret;
+
+ if (!pc->reg_ds)
+ return -ENOTSUPP;
+
+ ret = meson_get_bank(pc, pin, &bank);
+ if (ret)
+ return ret;
+
+ meson_calc_reg_and_bit(bank, pin, REG_DS, ®, &bit);
+
+ ret = regmap_read(pc->reg_ds, reg, &val);
+ if (ret)
+ return ret;
+
+ switch ((val >> bit) & 0x3) {
+ case MESON_PINCONF_DRV_500UA:
+ *drive_strength_ua = 500;
+ break;
+ case MESON_PINCONF_DRV_2500UA:
+ *drive_strength_ua = 2500;
+ break;
+ case MESON_PINCONF_DRV_3000UA:
+ *drive_strength_ua = 3000;
+ break;
+ case MESON_PINCONF_DRV_4000UA:
+ *drive_strength_ua = 4000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int meson_pinconf_get(struct pinctrl_dev *pcdev, unsigned int pin,
unsigned long *config)
{
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
enum pin_config_param param = pinconf_to_config_param(*config);
u16 arg;
+ int ret;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
else
return -EINVAL;
break;
+ case PIN_CONFIG_DRIVE_STRENGTH_UA:
+ ret = meson_pinconf_get_drive_strength(pc, pin, &arg);
+ if (ret)
+ return ret;
+ break;
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ ret = meson_pinconf_get_output(pc, pin);
+ if (ret <= 0)
+ return -EINVAL;
+ arg = 1;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ ret = meson_pinconf_get_output(pc, pin);
+ if (ret <= 0)
+ return -EINVAL;
+
+ ret = meson_pinconf_get_drive(pc, pin);
+ if (ret < 0)
+ return -EINVAL;
+
+ arg = ret;
+ break;
+
default:
return -ENOTSUPP;
}
static int meson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
- struct meson_pinctrl *pc = gpiochip_get_data(chip);
- unsigned int reg, bit;
- struct meson_bank *bank;
- int ret;
-
- ret = meson_get_bank(pc, gpio, &bank);
- if (ret)
- return ret;
-
- meson_calc_reg_and_bit(bank, gpio, REG_DIR, ®, &bit);
-
- return regmap_update_bits(pc->reg_gpio, reg, BIT(bit), BIT(bit));
+ return meson_pinconf_set_output(gpiochip_get_data(chip), gpio, false);
}
static int meson_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
int value)
{
- struct meson_pinctrl *pc = gpiochip_get_data(chip);
- unsigned int reg, bit;
- struct meson_bank *bank;
- int ret;
-
- ret = meson_get_bank(pc, gpio, &bank);
- if (ret)
- return ret;
-
- meson_calc_reg_and_bit(bank, gpio, REG_DIR, ®, &bit);
- ret = regmap_update_bits(pc->reg_gpio, reg, BIT(bit), 0);
- if (ret)
- return ret;
-
- meson_calc_reg_and_bit(bank, gpio, REG_OUT, ®, &bit);
- return regmap_update_bits(pc->reg_gpio, reg, BIT(bit),
- value ? BIT(bit) : 0);
+ return meson_pinconf_set_output_drive(gpiochip_get_data(chip),
+ gpio, value);
}
static void meson_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
{
- struct meson_pinctrl *pc = gpiochip_get_data(chip);
- unsigned int reg, bit;
- struct meson_bank *bank;
- int ret;
-
- ret = meson_get_bank(pc, gpio, &bank);
- if (ret)
- return;
-
- meson_calc_reg_and_bit(bank, gpio, REG_OUT, ®, &bit);
- regmap_update_bits(pc->reg_gpio, reg, BIT(bit),
- value ? BIT(bit) : 0);
+ meson_pinconf_set_drive(gpiochip_get_data(chip), gpio, value);
}
static int meson_gpio_get(struct gpio_chip *chip, unsigned gpio)
git.samba.org / sfrench / cifs-2.6.git / blobdiff