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imx8mq: Enable eMMC HS400 and SD UHS mode on EVK

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iMX8MQ EVK board has a eMMC5.0 chip and supports SD3.0, so enable the UHS
and HS400 configs to enhance the eMMC/SD access.

The change also needs to set usdhc clock to 400Mhz, and add the
off-on-delay-us to SD reset pin, otherwise some SD cards will
fail to select UHS mode in re-initialization.

Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2019-10-25 01:28:48 -07:00 committed by Stefano Babic
parent 6b87b3f4dc
commit 15a7426045
1 changed files with 2 additions and 4 deletions
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6
arch/arm/mach-imx/imx8m/clock_imx8mq.c
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@ -428,15 +428,13 @@ void init_clk_usdhc(u32 index)
case 0:
clock_enable(CCGR_USDHC1, 0);
clock_set_target_val(USDHC1_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2));
CLK_ROOT_SOURCE_SEL(1));
clock_enable(CCGR_USDHC1, 1);
return;
case 1:
clock_enable(CCGR_USDHC2, 0);
clock_set_target_val(USDHC2_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2));
CLK_ROOT_SOURCE_SEL(1));
clock_enable(CCGR_USDHC2, 1);
return;
default: