mfd: motorola-cpcap: Disable interrupt for suspend

Otherwise we get spammed with errors on resume after rtcwake:

 cpcap-core spi0.0: Failed to read IRQ status: -108

Note that rtcwake is still capable of waking up the system with
this patch.

Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/motorola-cpcap.c b/drivers/mfd/motorola-cpcap.c
index 52f38e57cdc192228b7635c2c3f7166e555c3256..2283d88adcc254cb6a4e4eba0d5ccfb83a2ea941 100644 (file)
--- a/drivers/mfd/motorola-cpcap.c
+++ b/drivers/mfd/motorola-cpcap.c
@@ -214,6 +214,28 @@ static const struct regmap_config cpcap_regmap_config = {
        .val_format_endian = REGMAP_ENDIAN_LITTLE,
 };
 
+#ifdef CONFIG_PM_SLEEP
+static int cpcap_suspend(struct device *dev)
+{
+       struct spi_device *spi = to_spi_device(dev);
+
+       disable_irq(spi->irq);
+
+       return 0;
+}
+
+static int cpcap_resume(struct device *dev)
+{
+       struct spi_device *spi = to_spi_device(dev);
+
+       enable_irq(spi->irq);
+
+       return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(cpcap_pm, cpcap_suspend, cpcap_resume);
+
 static const struct mfd_cell cpcap_mfd_devices[] = {
        {
                .name          = "cpcap_adc",
@@ -313,6 +335,7 @@ static struct spi_driver cpcap_driver = {
        .driver = {
                .name = "cpcap-core",
                .of_match_table = cpcap_of_match,
+               .pm = &cpcap_pm,
        },
        .probe = cpcap_probe,
 };