Attaching GPIO functionality to SDMMC0_DET pin (which
does in Linux base dts) make dwmmc driver "fail to detect
the card".
Card did not respond to voltage select!
It may be because the existing driver can't support gpio
card detection. So, change the pinctrl functionality from
RK_FUNC_GPIO to RK_FUNC_1 like other rk3399 dts does via
sdmmc_cd pin.
Add this change in -u-boot.dtsi so once we have a proper
fix or more details we may drop it this in future.
Cc: Robin Murphy <robin.murphy@xxxxxxx>
Reviewed-by: Kever Yang <kever.yang@xxxxxxxxxxxxxx>
Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
---
Changes for v8:
- drop pinctrl-names
- update proper commit
arch/arm/dts/rk3399-nanopi4-u-boot.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)
create mode 100644 arch/arm/dts/rk3399-nanopi4-u-boot.dtsi
diff --git a/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi b/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi
new file mode 100644
index 0000000000..bb8bdf08c5
--- /dev/null
+++ b/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
+ */
+
+&sdmmc {
+ pinctrl-0 = <&sdmmc_bus4 &sdmmc_clk &sdmmc_cmd &sdmmc_cd>;
+};
--
2.18.0.321.gffc6fa0e3
_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/linux-rockchip
