From 1e6707bb5e0cd0dcf72af71f01792fe4e3721e7f Mon Sep 17 00:00:00 2001
From: Gao Pan <pandy.gao@nxp.com>
Date: Fri, 19 Jan 2018 14:30:36 +0800
Subject: [PATCH] MLK-17426 imx: lpi2c: add debug message when i2c peripheral
clk doesn't work
add debug message when i2c peripheral clk rate is 0, then
directly return -EINVAL.
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Andy Duan <fugang.duan@nxp.com>
(Vipul: Fixed merge conflicts)
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
---
drivers/i2c/busses/i2c-imx-lpi2c.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index b245eeaf5d7094..e98aefac7fef60 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -216,7 +216,12 @@ 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);
+ 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
--
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