Commit b610c4bb authored by Carlos Song's avatar Carlos Song Committed by Wolfram Sang
Browse files

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



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: default avatarCarlos Song <carlos.song@nxp.com>
Acked-by: default avatarDong Aisheng <Aisheng.dong@nxp.com>
Reviewed-by: default avatarAndi Shyti <andi.shyti@kernel.org>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
parent 2ccdd1b1

drivers/i2c/busses/i2c-imx-lpi2c.c

+3 −0
Original line number Diff line number Diff line
@@ -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