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path: root/drivers/i2c/busses/i2c-designware-common.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-designware-common.c')
-rw-r--r--drivers/i2c/busses/i2c-designware-common.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
index a4730111d290..2de7452fcd6d 100644
--- a/drivers/i2c/busses/i2c-designware-common.c
+++ b/drivers/i2c/busses/i2c-designware-common.c
@@ -251,13 +251,27 @@ unsigned long i2c_dw_clk_rate(struct dw_i2c_dev *dev)
int i2c_dw_prepare_clk(struct dw_i2c_dev *dev, bool prepare)
{
+ int ret;
+
if (IS_ERR(dev->clk))
return PTR_ERR(dev->clk);
- if (prepare)
- return clk_prepare_enable(dev->clk);
+ if (prepare) {
+ /* Optional interface clock */
+ ret = clk_prepare_enable(dev->pclk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dev->clk);
+ if (ret)
+ clk_disable_unprepare(dev->pclk);
+
+ return ret;
+ }
clk_disable_unprepare(dev->clk);
+ clk_disable_unprepare(dev->pclk);
+
return 0;
}
EXPORT_SYMBOL_GPL(i2c_dw_prepare_clk);