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| author | Wenyou Yang <wenyou.yang@atmel.com> | 2014-11-10 09:55:52 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2014-11-12 16:50:24 +0100 |
| commit | 62d10c402f085be2bfa51b39199a76249ec09396 (patch) | |
| tree | b2b60c8e6894473738a37857499922d88f144cbe /drivers/i2c | |
| parent | ab0831d0f35b44724390134d03bcff99ae0d8a7e (diff) | |
| download | linux-62d10c402f085be2bfa51b39199a76249ec09396.tar.gz linux-62d10c402f085be2bfa51b39199a76249ec09396.tar.bz2 linux-62d10c402f085be2bfa51b39199a76249ec09396.zip | |
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: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-at91.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index 7c335f41dc3d..77fb6472fd5d 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -32,6 +32,7 @@ #include <linux/slab.h> #include <linux/platform_data/dma-atmel.h> #include <linux/pm_runtime.h> +#include <linux/pinctrl/consumer.h> #define DEFAULT_TWI_CLK_HZ 100000 /* max 400 Kbits/s */ #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); + pinctrl_pm_select_sleep_state(dev); + 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); + pinctrl_pm_select_default_state(dev); + return clk_prepare_enable(twi_dev->clk); } |