diff options
| author |   Jonas Karlman <jonas@kwiboo.se> | 2024-11-19 23:08:36 +0000 |
|---|---|---|
| committer |   Heiko Stuebner <heiko@sntech.de> | 2025-01-03 15:24:20 +0100 |
| commit | 26c100232b09ced0857306ac9831a4fa9c9aa231 (patch) | |
| tree | aedc17989ebfb81779ad12abf09fa0ce97611d2e | |
| parent | arm64: dts: rockchip: enable the mmu600_pcie IOMMU on the rk3588 SoC (diff) | |
| download | wireguard-linux-26c100232b09ced0857306ac9831a4fa9c9aa231.tar.xz wireguard-linux-26c100232b09ced0857306ac9831a4fa9c9aa231.zip | |
arm64: dts: rockchip: Fix sdmmc access on rk3308-rock-s0 v1.1 boards
BootROM leave GPIO4_D6 configured as SDMMC_PWREN function and DW MCI
driver set PRWEN high on MMC_POWER_UP and low on MMC_POWER_OFF.
Similarly U-Boot also set PRWEN high before accessing mmc.
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.
Model an always-on active low fixed regulator using GPIO4_D6 to fix
use of sdmmc on older HW revisions of the board.
Fixes: adeb5d2a4ba4 ("arm64: dts: rockchip: Add Radxa ROCK S0")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20241119230838.4137130-1-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/boot/dts/rockchip/rk3308-rock-s0.dts | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/arm64/boot/dts/rockchip/rk3308-rock-s0.dts b/arch/arm64/boot/dts/rockchip/rk3308-rock-s0.dts index bd6419a5c20a..8311af4c8689 100644 --- a/arch/arm64/boot/dts/rockchip/rk3308-rock-s0.dts +++ b/arch/arm64/boot/dts/rockchip/rk3308-rock-s0.dts @@ -74,6 +74,23 @@ vin-supply = <&vcc5v0_sys>; }; + /* + * 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>; + }; + vcc5v0_sys: regulator-5v0-vcc-sys { compatible = "regulator-fixed"; regulator-name = "vcc5v0_sys"; @@ -181,6 +198,12 @@ }; }; + sdmmc { + sdmmc_2030: sdmmc-2030 { + rockchip,pins = <4 RK_PD6 RK_FUNC_GPIO &pcfg_pull_none>; + }; + }; + wifi { wifi_reg_on: wifi-reg-on { rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>; @@ -233,7 +256,7 @@ cap-mmc-highspeed; cap-sd-highspeed; disable-wp; - vmmc-supply = <&vcc_io>; + vmmc-supply = <&vcc_sd>; status = "okay"; }; |