[PATCH v2 v2 4/8] dts: k1: add SD card support in u-boot overlay

[Peng Fan]

On Mon, Jun 29, 2026 at 11:51:18PM +0800, Eric Chung wrote:
>Add the SDH0 controller node and its pinctrl groups to the u-boot
>overlay. The upstream DTS only contains the eMMC node; the SD card
>controller (sdhci at d4280000) and its MMC1 pinctrl configuration are
>missing. Place the new node inside the storage-bus via path-based
>merge so it inherits the dma-ranges from the parent bus.
>
>Signed-off-by: Eric Chung <eric.chung at riscstar.com>
>
>---
>v2:
>- Use vmmc-supply as vqmmc-supply on SD node.
>- Add alias of mmc0 and mmc1.
>---
> arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi | 87 ++++++++++++++++++++++++++++++-
> arch/riscv/dts/k1-musepi-pro-u-boot.dtsi  | 82 ++++++++++++++++++++++++++++-
> 2 files changed, 165 insertions(+), 4 deletions(-)
>
>diff --git a/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi b/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi
>index 7f9443d6951..463952dc047 100644
>--- a/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi
>+++ b/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi
>@@ -6,6 +6,11 @@
> #include "binman.dtsi"
> 
> / {
>+	aliases {
>+		mmc0 = &emmc;
>+		mmc1 = &sdhci0;
>+	};
>+
> 	memory at 0 {
> 		device_type = "memory";
> 		reg = <0x00000000 0x00000000 0x00000000 0x80000000>;
>@@ -76,12 +81,14 @@
> 				bootph-pre-ram;
> 			};
> 
>-			buck3 {
>+			buck3_1v8: buck3 {
> 				regulator-name = "vdd_1v8";
> 				bootph-pre-ram;
> 			};
> 
>-			aldo1 {
>+			buck4_3v3: buck4 { };
>+
>+			aldo1: aldo1 {
> 				regulator-name = "vdd_1v8_mmc";
> 				bootph-pre-ram;
> 			};
>@@ -89,6 +96,82 @@
> 	};
> };
> 
>+/ {
>+	soc {
>+		storage-bus {
>+			sdhci0: mmc at d4280000 {
>+				bootph-pre-ram;
>+				compatible = "spacemit,k1-sdhci";
>+				reg = <0x0 0xd4280000 0x0 0x200>;
>+				clocks = <&syscon_apmu CLK_SDH_AXI>,
>+					 <&syscon_apmu CLK_SDH0>;
>+				clock-names = "core", "io";
>+				interrupts = <99>;
>+				resets = <&syscon_apmu RESET_SDH_AXI>,
>+					 <&syscon_apmu RESET_SDH0>;
>+				reset-names = "sdh_axi", "sdh0";
>+				bus-width = <4>;
>+				max-frequency = <204800000>;
>+				cd-gpios = <&gpio K1_GPIO(80) GPIO_ACTIVE_LOW>;
>+				pinctrl-names = "default", "fast";

Still fast, while your driver and changelog says uhs.

>+				pinctrl-0 = <&sdhci0_0_cfg>;