From: Liguo Zhang <liguo.zhang@xxxxxxxxxxxx>
mt65xx i2c controller initial setting will be cleared after system suspend,
so we should init mt65xx i2c controller again when system resume.
Signed-off-by: Liguo Zhang <liguo.zhang@xxxxxxxxxxxx>
Signed-off-by: Eddie Huang <eddie.huang@xxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-mt65xx.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index c02e6c0..9b86716 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -728,11 +728,27 @@ static int mtk_i2c_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int mtk_i2c_resume(struct device *dev)
+{
+ struct mtk_i2c *i2c = dev_get_drvdata(dev);
+
+ mtk_i2c_init_hw(i2c);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops mtk_i2c_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(NULL, mtk_i2c_resume)
+};
+
static struct platform_driver mtk_i2c_driver = {
.probe = mtk_i2c_probe,
.remove = mtk_i2c_remove,
.driver = {
.name = I2C_DRV_NAME,
+ .pm = &mtk_i2c_pm,
.of_match_table = of_match_ptr(mtk_i2c_of_match),
},
};
--
1.9.1
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