Hi Akash,
> ROCK Pi S is RK3308 based SBC from radxa.com. ROCK Pi S has a,
> - 256MB/512MB DDR3 RAM
> - SD, NAND flash (optional on board 1/2/4/8Gb)
> - 100MB ethernet, PoE (optional)
> - Onboard 802.11 b/g/n wifi + Bluetooth 4.0 Module
> - USB2.0 Type-A HOST x1
> - USB3.0 Type-C OTG x1
> - 26-pin expansion header
> - USB Type-C DC 5V Power Supply
>
> This patch enables
> - Console
> - NAND Flash
> - SD Card
>
> Signed-off-by: Akash Gajjar <akash@xxxxxxxxxxxx>
> ---
> Changes in v4
> - remove supports-sd/sdio, nums-slots property
> - use vmmc-supply for emmc node
>
> Changes in v3
> - Use small S on dts file name
> - Add missing semicolon
> - Remove USB2.0 node support
>
> Changes in v2
> - Use pwm-supply for vdd_core node instead of vi-supply
> - Add USB2.0 node support
>
> .../devicetree/bindings/arm/rockchip.yaml | 5 +
> arch/arm64/boot/dts/rockchip/Makefile | 1 +
> .../boot/dts/rockchip/rk3308-rock-pi-s.dts | 216 ++++++++++++++++++
> 3 files changed, 222 insertions(+)
> create mode 100644 arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts
>
> diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml b/Documentation/devicetree/bindings/arm/rockchip.yaml
> index d9847b306b83..48d40c928d45 100644
> --- a/Documentation/devicetree/bindings/arm/rockchip.yaml
> +++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
> @@ -422,6 +422,11 @@ properties:
> - const: radxa,rockpi4
> - const: rockchip,rk3399
>
> + - description: Radxa ROCK Pi S
> + items:
> + - const: radxa,rockpis
> + - const: rockchip,rk3308
> +
> - description: Radxa Rock2 Square
> items:
> - const: radxa,rock2-square
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
> index 48fb631d5451..e56a5527bab4 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -2,6 +2,7 @@
> dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-evb.dtb
> dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-evb.dtb
> dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-roc-cc.dtb
> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-rock-pi-s.dtb
> dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-a1.dtb
> dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-evb.dtb
> dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-rock64.dtb
> diff --git a/arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts b/arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts
> new file mode 100644
> index 000000000000..7c7b9a2d3701
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts
> @@ -0,0 +1,216 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 Akash Gajjar <akash@xxxxxxxxxxxx>
> + * Copyright (c) 2019 Jagan Teki <jagan@xxxxxxxxxxxx>
> + */
> +
> +/dts-v1/;
> +#include "rk3308.dtsi"
> +
> +/ {
> + model = "Radxa ROCK Pi S";
> + compatible = "radxa,rockpis", "rockchip,rk3308";
> +
> + chosen {
> + stdout-path = "serial0:1500000n8";
> + };
> +
> + leds {
> + compatible = "gpio-leds";
> + pinctrl-names = "default";
> + pinctrl-0 = <&green_led_gio>, <&heartbeat_led_gpio>;
> +
> + green-led {
> + label = "rockpis:green:power";
> + gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_HIGH>;
> + linux,default-trigger = "default-on";
> + default-state = "on";
> + };
> +
> + blue-led {
> + label = "rockpis:blue:user";
> + gpios = <&gpio0 RK_PA5 GPIO_ACTIVE_HIGH>;
> + default-state = "on";
> + linux,default-trigger = "heartbeat";
> + };
> + };
> +
> + sdio_pwrseq: sdio-pwrseq {
> + compatible = "mmc-pwrseq-simple";
> + pinctrl-names = "default";
> + pinctrl-0 = <&wifi_enable_h>;
> + reset-gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_LOW>;
> + };
> +
> + vcc5v0_sys: vcc5v0-sys {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc5v0_sys";
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + };
> +
> + vdd_core: vdd-core {
> + compatible = "pwm-regulator";
> + pwms = <&pwm0 0 5000 1>;
> + regulator-name = "vdd_core";
> + regulator-min-microvolt = <827000>;
> + regulator-max-microvolt = <1340000>;
> + regulator-init-microvolt = <1015000>;
> + regulator-settling-time-up-us = <250>;
> + regulator-always-on;
> + regulator-boot-on;
> + pwm-supply = <&vcc5v0_sys>;
> + };
> +
> + vdd_log: vdd-log {
> + compatible = "regulator-fixed";
> + regulator-name = "vdd_log";
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <1050000>;
> + regulator-max-microvolt = <1050000>;
> + vin-supply = <&vcc5v0_sys>;
> + };
> +
> + vcc_ddr: vcc-ddr {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc_ddr";
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <1500000>;
> + regulator-max-microvolt = <1500000>;
> + vin-supply = <&vcc5v0_sys>;
> + };
> +
> + vcc_1v8: vcc-1v8 {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc_1v8";
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + vin-supply = <&vcc_io>;
> + };
> +
> + vcc_io: vcc-io {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc_io";
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + vin-supply = <&vcc5v0_sys>;
> + };
> +
> + vcc5v0_otg: vcc5v0-otg {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc5v0_otg";
> + regulator-always-on;
> + gpio = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + pinctrl-names = "default";
> + pinctrl-0 = <&otg_vbus_drv>;
> + vin-supply = <&vcc5v0_sys>;
> + };
> +};
> +
> +&cpu0 {
> + cpu-supply = <&vdd_core>;
> +};
> +
> +&emmc {
> + bus-width = <4>;
> + cap-mmc-highspeed;
> + mmc-hs200-1_8v;
> + disable-wp;
Remove all disable-wp from emmc or sdio controllers.
> + non-removable;
> + vmmc-supply = <&vcc_io>;
> + status = "okay";
> +};
> +
> +&i2c1 {
> + status = "okay";
> +};
> +
> +&sdmmc {
Sort nodes alphabetically for someone after you who wants to add a node
in a list that is already a mess.
> + bus-width = <4>;
bus-width = <4>;
Already in dtsi.
> + cap-mmc-highspeed;
Only micro SD.
Do we still need cap-mmc-highspeed?
> + cap-sd-highspeed;
> + max-frequeency = <150000000>;
replace max-frequeency by max-frequency
max-frequency = <150000000> is already defined in rk3308.dtsi,
so remove or change value.
> + disable-wp;
> + pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_det &sdmmc_bus4>;
> + card-detect-delay = <800>;
Why do we need this?
Why is this value set to 800? All other dts use 200.
What changed in the specifications?
> + status = "okay";
> +};
> +
> +&spi2 {
Sort nodes alphabetically.
> + status = "okay";
status below
> + max-freq = <10000000>;
> +};
> +
> +&pinctrl {
> + pinctrl-names = "default";
> + pinctrl-0 = <&rtc_32k>;
> +
> + leds {
> + green_led_gio: green-led-gpio {
> + rockchip,pins = <0 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
> + };
> +
> + heartbeat_led_gpio: heartbeat-led-gpio {
> + rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_none>;
> + };
> + };
> +
> + usb {
> + otg_vbus_drv: otg-vbus-drv {
> + rockchip,pins = <0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
> + };
> + };
> +
> + sdio-pwrseq {
> + wifi_enable_h: wifi-enable-h {
> + rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
> + };
> +
> + wifi_host_wake: wifi-host-wake {
> + rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_down>;
> + };
> + };
> +};
> +
> +&pwm0 {
> + status = "okay";
status below
> + pinctrl-0 = <&pwm0_pin_pull_down>;
> +};
> +
> +&saradc {
> + vref-supply = <&vcc_1v8>;
> + status = "okay";
> +};
> +
> +&sdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + bus-width = <4>;
bus-width = <4>;
Already in dtsi.
> + max-frequency = <1000000>;
> + cap-sd-highspeed;
> + cap-sdio-irq;
> + keep-power-in-suspend;
> + mmc-pwrseq = <&sdio_pwrseq>;
> + non-removable;
> + sd-uhs-sdr104;
Sort properties.
Keep status below.
> + status = "okay";
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> +
> +&uart4 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart4_xfer &uart4_rts &uart4_cts>;
> + status = "okay";
> +};
> --
> 2.17.1
