From: Carlo Caione <ca...@endlessm.com>
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 <ca...@endlessm.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
arch/arm/mach-rockchip/rk3288-board.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/mach-rockchip/rk3288-board.c
b/arch/arm/mach-rockchip/rk3288-board.c
index 0365793009..bf24d8e074 100644
--- a/arch/arm/mach-rockchip/rk3288-board.c
+++ b/arch/arm/mach-rockchip/rk3288-board.c
@@ -307,6 +307,7 @@ U_BOOT_CMD(
""
);
+#define GRF_SOC_CON0 0xff770244
#define GRF_SOC_CON2 0xff77024c
int board_early_init_f(void)
@@ -339,5 +340,11 @@ 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;
}
--
2.17.1
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