On Wed, Nov 02, 2016 at 05:21:48PM +0800, Wenyou Yang wrote:
> Add suspend/resume callback, support the pinctrl sleep state when
> the system suspend as well.
>
> Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
Acked-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Thanks
> ---
>
> Changes in v2:
> - Use CONFIG_PM_SLEEP.
> - Use SIMPLE_DEV_PM_OPS macro.
>
> drivers/iio/adc/at91_adc.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index bbdac07..34b928c 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,
> },
> };
>
> --
> 2.7.4
>
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