[PATCH 3/3] i2c: mediatek: Enable i2c module clock before i2c registers access.

Jun Gao
2017-12-19T06:51:03Z

From: Jun Gao <jun.gao@mediatek.com>

Make sure i2c module clock has been enabled before i2c registers
access.

Signed-off-by: Jun Gao <jun.gao@mediatek.com>
---
drivers/i2c/busses/i2c-mt65xx.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 58d6401..cf23a74 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -861,10 +861,19 @@ static int mtk_i2c_remove(struct platform_device *pdev)
#ifdef CONFIG_PM_SLEEP
static int mtk_i2c_resume(struct device *dev)
{
+ int ret;
struct mtk_i2c *i2c = dev_get_drvdata(dev);

+ ret = mtk_i2c_clock_enable(i2c);
+ if (ret) {
+ dev_err(dev, "clock enable failed!\n");
+ return ret;
+ }
+
mtk_i2c_init_hw(i2c);

+ mtk_i2c_clock_disable(i2c);
+
return 0;
}
#endif
--
1.8.1.1