Hi Levin,
Am Dienstag, 8. Mai 2018, 04:48:24 CEST schrieb djw@xxxxxxxxxxxxx:
> From: Levin Du <djw@xxxxxxxxxxxxx>
>
> 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.
>
> However, this pin, not being a normal gpio in the rockchip pinctrl,
> is set by bit 1 of system register GRF_SOC_CON10. Therefore a new
> gpio controller using gpio-syscon driver is defined in order to use
> regulator-gpio.
>
> 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@xxxxxxxxxxxxx>
>
> ---
>
> arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 36 ++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
> index 246c317..792cb04 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
> @@ -14,6 +14,12 @@
> stdout-path = "serial2:1500000n8";
> };
>
> + gpio_syscon10: gpio-syscon10 {
> + compatible = "rockchip,rk3328-gpio-syscon10";
> + gpio-controller;
> + #gpio-cells = <2>;
> + };
> +
please split this into a separate patch, move it to rk3328.dtsi and together
with the suggestions from patch 1/2 make it look like
grf: syscon@ff100000 {
compatible = "rockchip,rk3328-grf", "syscon", "simple-mfd";
reg = <0x0 0xff100000 0x0 0x1000>;
...
gpio_mute: gpio-mute {
compatible = "rockchip,rk3328-gpio-mute";
gpio-controller;
#gpio-cells = <2>;
};
...
};
So making the gpio-controller a child of the grf node.
And as this definition is not specific to the roc-cc it should be in the
main devicetree file for the rk3328.
> gmac_clkin: external-gmac-clock {
> compatible = "fixed-clock";
> clock-frequency = <125000000>;
> @@ -41,6 +47,19 @@
> 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;
> @@ -208,6 +227,18 @@
> };
> };
>
> +&io_domains {
> + status = "okay";
> +
> + vccio1-supply = <&vcc_io>;
> + vccio2-supply = <&vcc18_emmc>;
> + vccio3-supply = <&vcc_sdio>;
> + vccio4-supply = <&vcc_18>;
> + vccio5-supply = <&vcc_io>;
> + vccio6-supply = <&vcc_io>;
> + pmuio-supply = <&vcc_io>;
> +};
> +
Please split this into a separate patch about
"adding io-domain supplies for roc-cc"
> &pinctrl {
> pmic {
> pmic_int_l: pmic-int-l {
> @@ -227,10 +258,15 @@
> cap-mmc-highspeed;
> cap-sd-highspeed;
> disable-wp;
> + sd-uhs-sdr12;
> + sd-uhs-sdr25;
> + sd-uhs-sdr50;
> + sd-uhs-sdr104;
please sort properties alphabetically, so between pinctrl-0 and vmmc-supply
> max-frequency = <150000000>;
> pinctrl-names = "default";
> pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;
> vmmc-supply = <&vcc_sd>;
> + vqmmc-supply = <&vcc_sdio>;
> status = "okay";
> };
Thanks
Heiko
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