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i2c: imx-lpi2c: return -EINVAL when i2c peripheral clk doesn't work

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On MX8X platforms, the default clock rate is 0 if without explicit
clock setting in dts nodes. I2c can't work when i2c peripheral clk
rate is 0.

Add a i2c peripheral clk rate check before configuring the clock
register. When i2c peripheral clk rate is 0 and directly return
-EINVAL.

Signed-off-by: Carlos Song <carlos.song@nxp.com>
Acked-by: Dong Aisheng <Aisheng.dong@nxp.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Carlos Song 2023-07-26 17:22:38 +08:00 committed by Wolfram Sang
parent 2ccdd1b13c
commit b610c4bbd1
1 changed files with 3 additions and 0 deletions
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3
drivers/i2c/busses/i2c-imx-lpi2c.c
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@ -209,6 +209,9 @@ static int lpi2c_imx_config(struct lpi2c_imx_struct *lpi2c_imx)
lpi2c_imx_set_mode(lpi2c_imx);
clk_rate = clk_get_rate(lpi2c_imx->clks[0].clk);
if (!clk_rate)
return -EINVAL;
if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST)
filt = 0;
else