@@ -2,11 +2,50 @@
#include "rk3308-u-boot.dtsi"
+/ {
+ /*
+ * HW revision prior to v1.2 must pull GPIO4_D6 low to access sdmmc.
+ * This is modeled as an always-on active low fixed regulator.
+ */
+ vcc_sd: regulator-3v3-vcc-sd {
+ compatible = "regulator-fixed";
+ gpios = <&gpio4 RK_PD6 GPIO_ACTIVE_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&sdmmc_2030>;
+ regulator-name = "vcc_sd";
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ vin-supply = <&vcc_io>;
+ };
+};
+
&emmc_pwren {
bootph-pre-ram;
bootph-some-ram;
};
+&gpio4 {
+ bootph-pre-ram;
+};
+
+&pinctrl {
+ sdmmc {
+ sdmmc_2030: sdmmc-2030 {
+ rockchip,pins = <4 RK_PD6 RK_FUNC_GPIO &pcfg_pull_none>;
+ };
+ };
+};
+
+&sdmmc {
+ vmmc-supply = <&vcc_sd>;
+};
+
+&sdmmc_2030 {
+ bootph-pre-ram;
+};
+
&uart0 {
bootph-all;
clock-frequency = <24000000>;
@@ -16,6 +55,10 @@
bootph-all;
};
+&vcc_sd {
+ bootph-pre-ram;
+};
+
&vdd_core {
regulator-init-microvolt = <1015000>;
};
@@ -2,6 +2,7 @@ CONFIG_ARM=y
CONFIG_SKIP_LOWLEVEL_INIT=y
CONFIG_COUNTER_FREQUENCY=24000000
CONFIG_ARCH_ROCKCHIP=y
+CONFIG_SPL_GPIO=y
CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3308-rock-s0"
CONFIG_DM_RESET=y
CONFIG_ROCKCHIP_RK3308=y
@@ -53,6 +54,7 @@ CONFIG_PHY_ROCKCHIP_INNO_USB2=y
CONFIG_PINCTRL=y
CONFIG_REGULATOR_PWM=y
CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_SPL_DM_REGULATOR_FIXED=y
CONFIG_PWM_ROCKCHIP=y
CONFIG_RAM=y
CONFIG_BAUDRATE=1500000
BootROM leave GPIO4_D6 configured as SDMMC_PWREN function and DW MMC driver set PWREN high in dwmci_init(). However, HW revision prior to v1.2 must pull GPIO4_D6 low to access sdmmc. For HW revision v1.2 the state of GPIO4_D6 has no impact. Upstream linux-rockchip maintainer tree has merged a patch "arm64: dts: rockchip: Fix sdmmc access on rk3308-rock-s0 v1.1 boards" for v6.14 to fix this issue. Add the upstream vmmc-supply regulator in board u-boot.dtsi and enable required Kconfig options to set GPIO4_D6 low to fix reading sdmmc on v1.1 hw revision. The regulator-3v3-vcc-sd and sdmmc-2030 nodes along with the vmmc-supply prop can be dropped once dts/upstream sync v6.14 DTs. Fixes: 25438c40a007 ("board: rockchip: Add Radxa ROCK S0") Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Kever Yang <kever.yang@rock-chips.com> --- v2: - Rebased to fix clean apply on master - Collect r-b tags This matches pending Linux commit 26c100232b09 ("arm64: dts: rockchip: Fix sdmmc access on rk3308-rock-s0 v1.1 boards") targeting v6.14: https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/commit/?h=v6.14-rockchip-dts64-1&id=26c100232b09ced0857306ac9831a4fa9c9aa231 --- arch/arm/dts/rk3308-rock-s0-u-boot.dtsi | 43 +++++++++++++++++++++++++ configs/rock-s0-rk3308_defconfig | 2 ++ 2 files changed, 45 insertions(+)