Messages in this thread Patch in this message | | | From | Jun Gao <> | Subject | [PATCH 3/3] i2c: mediatek: Enable i2c module clock before i2c registers access. | Date | Tue, 19 Dec 2017 14:51:03 +0800 |
| |
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
| |