[PATCH 6.19 618/844] arm64: dts: rockchip: Fix SD card support for RK3576 Nanopi R76s

[Sasha Levin]

From: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>

[ Upstream commit a9c1acebfe0484343a443d082e039ca77186ed22 ]

When runtime suspend is enabled, the associated power domain is powered
off, which resets the registers, including the power control bit. As a result,
the card loses power during runtime suspend. The card should still be able
to process I/O with the help of mmc_blk_mq_rw_recovery(), which is suboptimal.
To address this issue, we must use vmmc-supply with a GPIO based method to
maintain power to the card and store valid tuning phases. Also, add cd-gpios
method to make hot-plug work correctly during idle periods.

Fixes: 7fee88882704 ("arm64: dts: rockchip: Add devicetree for the FriendlyElec NanoPi R76S")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Tested-by: Marco Schirrmeister <mschirrmeister@xxxxxxxxx>
Link: https://patch.msgid.link/1768524932-163929-6-git-send-email-shawn.lin@xxxxxxxxxxxxxx
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 .../boot/dts/rockchip/rk3576-nanopi-r76s.dts  | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts b/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts
index 31fbefaeceab4..7ec27b05ff10e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts
@@ -192,6 +192,18 @@ vcc_3v3_s0: regulator-vcc-3v3-s0 {
 		regulator-name = "vcc_3v3_s0";
 		vin-supply = <&vcc_3v3_s3>;
 	};
+
+	vcc3v3_sd: regulator-vcc-3v3-sd {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpios = <&gpio0 RK_PB6 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdmmc_pwren>;
+		regulator-name = "vcc3v3_sd";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc_3v3_s0>;
+	};
 };
 
 &combphy0_ps {
@@ -726,6 +738,12 @@ pcie1_perstn: pcie1-perstn {
 		};
 	};
 
+	sdmmc {
+		sdmmc_pwren: sdmmc-pwren {
+			rockchip,pins = <0 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	usb {
 		usb_otg0_pwren_h: usb-otg0-pwren-h {
 			rockchip,pins = <0 RK_PD1 RK_FUNC_GPIO &pcfg_pull_none>;
@@ -751,11 +769,14 @@ &sdmmc {
 	bus-width = <4>;
 	cap-mmc-highspeed;
 	cap-sd-highspeed;
+	cd-gpios = <&gpio0 RK_PA7 GPIO_ACTIVE_LOW>;
 	disable-wp;
 	no-mmc;
 	no-sdio;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_det &sdmmc0_bus4>;
 	sd-uhs-sdr104;
-	vmmc-supply = <&vcc_3v3_s3>;
+	vmmc-supply = <&vcc3v3_sd>;
 	vqmmc-supply = <&vccio_sd_s0>;
 	status = "okay";
 };
-- 
2.51.0