diff options
| author |   Wenyou Yang <wenyou.yang@atmel.com> | 2016-11-02 17:21:48 +0800 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2016-11-05 16:33:00 +0000 |
| commit | bc3ae982e2fb498e2f5492497ea927a161380bc1 (patch) | |
| tree | 02a79c19e991cbe4e3a1fe802e6eb68f4879e5c6 /drivers/iio | |
| parent | iio: hid-sensor-attributes: Check sample_frequency/hysteresis write data legitimacy (diff) | |
| download | linux-dev-bc3ae982e2fb498e2f5492497ea927a161380bc1.tar.xz linux-dev-bc3ae982e2fb498e2f5492497ea927a161380bc1.zip | |
iio: adc: at91: add suspend and resume callback
Add suspend/resume callback, support the pinctrl sleep state when
the system suspend as well.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/at91_adc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index bbdac07f4aaa..34b928cefeed 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -30,6 +30,7 @@ #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> +#include <linux/pinctrl/consumer.h> /* Registers */ #define AT91_ADC_CR 0x00 /* Control Register */ @@ -1347,6 +1348,32 @@ static int at91_adc_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int at91_adc_suspend(struct device *dev) +{ + struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev)); + struct at91_adc_state *st = iio_priv(idev); + + pinctrl_pm_select_sleep_state(dev); + clk_disable_unprepare(st->clk); + + return 0; +} + +static int at91_adc_resume(struct device *dev) +{ + struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev)); + struct at91_adc_state *st = iio_priv(idev); + + clk_prepare_enable(st->clk); + pinctrl_pm_select_default_state(dev); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(at91_adc_pm_ops, at91_adc_suspend, at91_adc_resume); + static struct at91_adc_caps at91sam9260_caps = { .calc_startup_ticks = calc_startup_ticks_9260, .num_channels = 4, @@ -1441,6 +1468,7 @@ static struct platform_driver at91_adc_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = of_match_ptr(at91_adc_dt_ids), + .pm = &at91_adc_pm_ops, }, }; |