[PATCH V2 08/18] i2c: imx-lpi2c: add debug message when i2c peripheral clk doesn't work

[Clark Wang]

From: Gao Pan <pandy.gao@xxxxxxx>

add debug message when i2c peripheral clk rate is 0, then
directly return -EINVAL.

Signed-off-by: Clark Wang <xiaoning.wang@xxxxxxx>
Signed-off-by: Gao Pan <pandy.gao@xxxxxxx>
Reviewed-by: Andy Duan <fugang.duan@xxxxxxx>
---
V2 changes:
 - Add my signed-off.
---
 drivers/i2c/busses/i2c-imx-lpi2c.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 333209ba81c1..dfec334712c2 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -210,6 +210,11 @@ static int lpi2c_imx_config(struct lpi2c_imx_struct *lpi2c_imx)
 	lpi2c_imx_set_mode(lpi2c_imx);
 
 	clk_rate = clk_get_rate(lpi2c_imx->clk_per);
+	if (!clk_rate) {
+		dev_dbg(&lpi2c_imx->adapter.dev, "clk_per rate is 0\n");
+		return -EINVAL;
+	}
+
 	if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST)
 		filt = 0;
 	else
-- 
2.25.1