From mboxrd@z Thu Jan 1 00:00:00 1970 From: wenyou.yang@atmel.com (Wenyou Yang) Date: Fri, 24 Oct 2014 14:50:16 +0800 Subject: [PATCH v3 2/3] i2c/at91: add support for system PM In-Reply-To: <1414133417-11530-1-git-send-email-wenyou.yang@atmel.com> References: <1414133417-11530-1-git-send-email-wenyou.yang@atmel.com> Message-ID: <1414133417-11530-3-git-send-email-wenyou.yang@atmel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Signed-off-by: Wenyou Yang --- drivers/i2c/busses/i2c-at91.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index a25fb5e..6a84a2a 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, }; -- 1.7.9.5