From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Figa Subject: Re: [PATCH v2] i2c: s3c2410: resume the I2C controller earlier Date: Mon, 30 Jun 2014 20:00:52 +0200 Message-ID: <53B1A5D4.6050904@samsung.com> References: <1403654214-25072-1-git-send-email-dianders@chromium.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <1403654214-25072-1-git-send-email-dianders@chromium.org> Sender: linux-kernel-owner@vger.kernel.org To: Doug Anderson , Wolfram Sang , Kukjin Kim , Ben Dooks Cc: Tomasz Figa , javier.martinez@collabora.co.uk, Vincent Palatin , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-i2c@vger.kernel.org Hi Doug, On 25.06.2014 01:56, Doug Anderson wrote: > From: Vincent Palatin > > When the wake-up is triggered by the PMIC RTC, the RTC driver is trying > to read the PMIC interrupt status over I2C and fails because the I2C > controller is not resumed yet. > Let's resume the I2C controller earlier in the _noirq phase > (as other hardwares are doing), so we can properly get the wake-up > condition. > > Signed-off-by: Vincent Palatin > Signed-off-by: Doug Anderson > --- > Changes in v2: > - Added missing freeze/thaw/poweroff/restore > > drivers/i2c/busses/i2c-s3c2410.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c > index e828a1d..ecb389c 100644 > --- a/drivers/i2c/busses/i2c-s3c2410.c > +++ b/drivers/i2c/busses/i2c-s3c2410.c > @@ -1267,7 +1267,7 @@ static int s3c24xx_i2c_suspend_noirq(struct device *dev) > return 0; > } > > -static int s3c24xx_i2c_resume(struct device *dev) > +static int s3c24xx_i2c_resume_noirq(struct device *dev) > { > struct platform_device *pdev = to_platform_device(dev); > struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); > @@ -1285,7 +1285,11 @@ static int s3c24xx_i2c_resume(struct device *dev) > static const struct dev_pm_ops s3c24xx_i2c_dev_pm_ops = { > #ifdef CONFIG_PM_SLEEP > .suspend_noirq = s3c24xx_i2c_suspend_noirq, > - .resume = s3c24xx_i2c_resume, > + .resume_noirq = s3c24xx_i2c_resume_noirq, > + .freeze_noirq = s3c24xx_i2c_suspend_noirq, > + .thaw_noirq = s3c24xx_i2c_resume_noirq, > + .poweroff_noirq = s3c24xx_i2c_suspend_noirq, > + .restore_noirq = s3c24xx_i2c_resume_noirq, > #endif > }; Also fixes certain issues on Exynos4-based boards. Acked-by: Tomasz Figa -- Best regards, Tomasz