linux-kernel - [PATCH v2] i2c: s3c2410: resume the I2C controller earlier

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Date:	Tue, 24 Jun 2014 16:56:54 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Wolfram Sang <wsa@...-dreams.de>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Ben Dooks <ben-linux@...ff.org>
Cc:	Tomasz Figa <tomasz.figa@...il.com>,
	javier.martinez@...labora.co.uk,
	Vincent Palatin <vpalatin@...omium.org>,
	Doug Anderson <dianders@...omium.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] i2c: s3c2410: resume the I2C controller earlier

From: Vincent Palatin <vpalatin@...omium.org>

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 <vpalatin@...omium.org>
Signed-off-by: Doug Anderson <dianders@...omium.org>
---
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
 };
 
-- 
2.0.0.526.g5318336

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