From: Carlos Song <carlos.song@xxxxxxx> 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@xxxxxxx> --- Changes for V5: - modify commit log - modify Signed-off-by list --- drivers/i2c/busses/i2c-imx-lpi2c.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c index c3287c887c6f..150d923ca7f1 100644 --- a/drivers/i2c/busses/i2c-imx-lpi2c.c +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c @@ -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 -- 2.34.1
