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 <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>
diff --git a/arch/arm/mach-rockchip/rk3288-board.c b/arch/arm/mach-rockchip/rk3288-board.c
index 0365793..73cd668 100644
--- a/arch/arm/mach-rockchip/rk3288-board.c
+++ b/arch/arm/mach-rockchip/rk3288-board.c
@@ -307,10 +307,10 @@
""
);
-#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 @@
}
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;
}