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| author | Wenyou Yang <wenyou.yang@atmel.com> | 2014-10-24 14:50:16 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2014-11-10 09:35:00 +0100 |
| commit | 36765293cd50bd8dffd5f3225376789cacddfb00 (patch) | |
| tree | 8268a4dd17da11efccd502574e6fce8daf242730 /drivers/i2c | |
| parent | d64a818859af3b6fbe0f6d61b4b82676b561ce5c (diff) | |
| download | linux-36765293cd50bd8dffd5f3225376789cacddfb00.tar.gz linux-36765293cd50bd8dffd5f3225376789cacddfb00.tar.bz2 linux-36765293cd50bd8dffd5f3225376789cacddfb00.zip | |
i2c: at91: add support for system PM
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Ludovic Desroches <ludovic.desroches@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 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index 76d16713508f..7c335f41dc3d 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -861,7 +861,33 @@ static int at91_twi_runtime_resume(struct device *dev) return clk_prepare_enable(twi_dev->clk); } +static int at91_twi_suspend_noirq(struct device *dev) +{ + if (!pm_runtime_status_suspended(dev)) + at91_twi_runtime_suspend(dev); + + return 0; +} + +static int at91_twi_resume_noirq(struct device *dev) +{ + int ret; + + if (!pm_runtime_status_suspended(dev)) { + ret = at91_twi_runtime_resume(dev); + if (ret) + return ret; + } + + pm_runtime_mark_last_busy(dev); + pm_request_autosuspend(dev); + + return 0; +} + static const struct dev_pm_ops at91_twi_pm = { + .suspend_noirq = at91_twi_suspend_noirq, + .resume_noirq = at91_twi_resume_noirq, .runtime_suspend = at91_twi_runtime_suspend, .runtime_resume = at91_twi_runtime_resume, }; |