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Commit bc3ae982 authored by Wenyou Yang's avatar Wenyou Yang Committed by Jonathan Cameron
Browse files

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: default avatarWenyou Yang <wenyou.yang@atmel.com>
Acked-by: default avatarLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent ab541631

drivers/iio/adc/at91_adc.c

+28 −0
Original line number Diff line number Diff line
@@ -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,

	},

};