[PATCH 05/11] i2c: imx-lpi2c: add debug message when i2c peripheral clk doesn't work
From: Clark Wang <xiaoning.wang@nxp.com>
Date: 2021-03-17 06:54:57
Also in:
linux-i2c, lkml
Subsystem:
freescale imx lpi2c driver, i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Dong Aisheng, Andi Shyti, Linus Torvalds
From: Gao Pan <redacted> add debug message when i2c peripheral clk rate is 0, then directly return -EINVAL. Signed-off-by: Gao Pan <redacted> Reviewed-by: Andy Duan <redacted> --- 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 e718bb6b2387..8f9dd3dd2951 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c@@ -209,7 +209,12 @@ 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
--
2.25.1
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