[PATCH v1 5/5] arm64: dts: rockchip: Add sdmmc UHS support for roc-rk3328-cc
From: <hidden>
Date: 2018-05-10 09:29:15
Also in:
linux-arm-kernel, linux-rockchip, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Levin Du <redacted> 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 <&gpio_syscon10 1>, 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 <redacted> --- Changes in v1: - Split into small patches - Sort dts properties in sdmmc node arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
index b983abd..3f33e42 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 = <&gpio_syscon10 1 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"; };
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2.7.4