[PATCH 6.19 166/781] arm64: dts: renesas: rzt2h-n2h-evk-common: Use GPIO for SD0 write protect

Greg Kroah-Hartman
2026-02-25T01:30:45Z

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

[ Upstream commit a1b1ee0348f889ec262482e16e9ff670617db7b0 ]

Switch SD0 write-protect detection to a GPIO on the RZ/T2H and RZ/N2H
EVKs. Both boards use a full-size SD card slot on the SD0 channel with
a dedicated WP pin.

The RZ/T2H and RZ/N2H SoCs use of_data_rcar_gen3, which sets
MMC_CAP2_NO_WRITE_PROTECT and causes the core to ignore the WP signal
unless a wp-gpios property is provided. Describe the WP pin as a GPIO
to allow the MMC core to evaluate the write-protect status correctly.

Fixes: d065453e5ee0 ("arm64: dts: renesas: rzt2h-rzn2h-evk: Enable SD card slot")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260106131319.643084-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
index 3eed1f3948e8e..63bd91690b540 100644
--- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
@@ -224,8 +224,7 @@ data-pins {
ctrl-pins {
pinmux = <RZT2H_PORT_PINMUX(12, 0, 0x29)>, /* SD0_CLK */
<RZT2H_PORT_PINMUX(12, 1, 0x29)>, /* SD0_CMD */
- <RZT2H_PORT_PINMUX(22, 5, 0x29)>, /* SD0_CD */
- <RZT2H_PORT_PINMUX(22, 6, 0x29)>; /* SD0_WP */
+ <RZT2H_PORT_PINMUX(22, 5, 0x29)>; /* SD0_CD */
};
};

@@ -282,6 +281,7 @@ &sdhi0 {
pinctrl-names = "default", "state_uhs";
vmmc-supply = <&reg_3p3v>;
vqmmc-supply = <&vqmmc_sdhi0>;
+ wp-gpios = <&pinctrl RZT2H_GPIO(22, 6) GPIO_ACTIVE_HIGH>;
bus-width = <4>;
sd-uhs-sdr50;
sd-uhs-sdr104;
--
2.51.0