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rk3288: Disable JTAG function from sdmmc0 IO

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The GRF_SOC_CON0.grf_force_jtag bit is automatically set at boot and it
is preventing the SDMMC to work correctly. Disable the JTAG function on
the assumption that a working SD has higher priority over JTAG.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Carlo Caione 2018-06-11 20:00:49 +01:00 committed by Philipp Tomsich
parent 0d4d5fd73c
commit 389167c3c4
1 changed files with 8 additions and 2 deletions
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10
arch/arm/mach-rockchip/rk3288-board.c
View file

@ -307,10 +307,10 @@ U_BOOT_CMD(
""
);
#define GRF_SOC_CON2 0xff77024c
int board_early_init_f(void)
{
const uintptr_t GRF_SOC_CON0 = 0xff770244;
const uintptr_t GRF_SOC_CON2 = 0xff77024c;
struct udevice *pinctrl;
struct udevice *dev;
int ret;
@ -339,5 +339,11 @@ int board_early_init_f(void)
}
rk_setreg(GRF_SOC_CON2, 1 << 0);
/*
* Disable JTAG on sdmmc0 IO. The SDMMC won't work until this bit is
* cleared
*/
rk_clrreg(GRF_SOC_CON0, 1 << 12);
return 0;
}