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Commit 62d10c40 authored by Wenyou Yang's avatar Wenyou Yang Committed by Wolfram Sang
Browse files

i2c: at91: adopt pinctrl support 



Amend the at91 i2c pin controller to set the state of the pins to:
- "default" on resume.
- "sleep" on suspend().

This should make it possible to optimize energy usage for the pins
both for the suspend/resume cycle

Signed-off-by: default avatarWenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent ab0831d0

drivers/i2c/busses/i2c-at91.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/slab.h>

#include <linux/slab.h>

#include <linux/platform_data/dma-atmel.h>

#include <linux/platform_data/dma-atmel.h>

#include <linux/pm_runtime.h>

#include <linux/pm_runtime.h>

#include <linux/pinctrl/consumer.h>





#define DEFAULT_TWI_CLK_HZ		100000		/* max 400 Kbits/s */

#define DEFAULT_TWI_CLK_HZ		100000		/* max 400 Kbits/s */

#define AT91_I2C_TIMEOUT	msecs_to_jiffies(100)	/* transfer timeout */

#define AT91_I2C_TIMEOUT	msecs_to_jiffies(100)	/* transfer timeout */
@@ -851,6 +852,8 @@ static int at91_twi_runtime_suspend(struct device *dev) 




	clk_disable_unprepare(twi_dev->clk);

	clk_disable_unprepare(twi_dev->clk);





	pinctrl_pm_select_sleep_state(dev);



	return 0;

	return 0;

}

}
@@ -858,6 +861,8 @@ static int at91_twi_runtime_resume(struct device *dev) 
{

{

	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);

	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);





	pinctrl_pm_select_default_state(dev);



	return clk_prepare_enable(twi_dev->clk);

	return clk_prepare_enable(twi_dev->clk);

}

}