From 389167c3c4f77f3e67c1a5ef689a58a44837a2f0 Mon Sep 17 00:00:00 2001 From: Carlo Caione Date: Mon, 11 Jun 2018 20:00:49 +0100 Subject: [PATCH] rk3288: Disable JTAG function from sdmmc0 IO 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 Reviewed-by: Simon Glass Reviewed-by: Philipp Tomsich Acked-by: Philipp Tomsich --- arch/arm/mach-rockchip/rk3288-board.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-rockchip/rk3288-board.c b/arch/arm/mach-rockchip/rk3288-board.c index 0365793009..73cd6684aa 100644 --- a/arch/arm/mach-rockchip/rk3288-board.c +++ b/arch/arm/mach-rockchip/rk3288-board.c @@ -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; } -- 2.25.1