diff options
| author | Levin Du <djw@t-chip.com.cn> | 2018-07-31 13:59:22 +0800 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2018-08-27 06:16:48 +0200 |
| commit | 99165b93dafe4f2a821b5dae106f2ef6b4ceff7e (patch) | |
| tree | 8408a86370515f95a18ebed7ddf7279cee4695dd | |
| parent | 692ff61efab62fde4ae43d611e9c0cdb060dacbd (diff) | |
| download | linux-99165b93dafe4f2a821b5dae106f2ef6b4ceff7e.tar.bz2 | |
arm64: dts: rockchip: add sdmmc UHS support for roc-rk3328-cc
In roc-rk3328-cc board, the signal voltage of sdmmc is supplied by the
vcc_sdio regulator, which is a mux between 1.8V and 3.3V, controlled by
a special output only gpio pin labeled "gpiomut_pmuio_iout",
corresponding bit 1 of the syscon GRF_SOC_CON10.
This special pin can now be reference as <&grf_gpio 0>, thanks to the
gpio-syscon driver, which makes writing regulator-gpio possible.
If the signal voltage changes, the io domain needs to change
correspondingly.
To use this feature, the following options are required in kernel config:
- CONFIG_GPIO_SYSCON=y
- CONFIG_POWER_AVS=y
- CONFIG_ROCKCHIP_IODOMAIN=y
Signed-off-by: Levin Du <djw@t-chip.com.cn>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| -rw-r--r-- | arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts index b983abd3d9c8..99d0d9912950 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts +++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts @@ -41,6 +41,19 @@ vin-supply = <&vcc_io>; }; + vcc_sdio: sdmmcio-regulator { + compatible = "regulator-gpio"; + gpios = <&grf_gpio 0 GPIO_ACTIVE_HIGH>; + states = <1800000 0x1 + 3300000 0x0>; + regulator-name = "vcc_sdio"; + regulator-type = "voltage"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3300000>; + regulator-always-on; + vin-supply = <&vcc_sys>; + }; + vcc_host1_5v: vcc_otg_5v: vcc-host1-5v-regulator { compatible = "regulator-fixed"; enable-active-high; @@ -213,7 +226,7 @@ vccio1-supply = <&vcc_io>; vccio2-supply = <&vcc18_emmc>; - vccio3-supply = <&vcc_io>; + vccio3-supply = <&vcc_sdio>; vccio4-supply = <&vcc_18>; vccio5-supply = <&vcc_io>; vccio6-supply = <&vcc_io>; @@ -242,7 +255,12 @@ max-frequency = <150000000>; pinctrl-names = "default"; pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>; + sd-uhs-sdr12; + sd-uhs-sdr25; + sd-uhs-sdr50; + sd-uhs-sdr104; vmmc-supply = <&vcc_sd>; + vqmmc-supply = <&vcc_sdio>; status = "okay"; }; |