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[v2,1/2] dt-bindings: Add doc for FriendlyARM NanoPi R2S

Message ID 20200730232054.286381-1-mail@david-bauer.net
State Not Applicable
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Series [v2,1/2] dt-bindings: Add doc for FriendlyARM NanoPi R2S | expand

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Context Check Description
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Commit Message

David Bauer July 30, 2020, 11:20 p.m. UTC
Add devicetree binding documentation for the FriendlyARM NanoPi R2S.

Signed-off-by: David Bauer <mail@david-bauer.net>
---
 Documentation/devicetree/bindings/arm/rockchip.yaml | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Rob Herring July 31, 2020, 10:43 p.m. UTC | #1
On Fri, 31 Jul 2020 01:20:53 +0200, David Bauer wrote:
> Add devicetree binding documentation for the FriendlyARM NanoPi R2S.
> 
> Signed-off-by: David Bauer <mail@david-bauer.net>
> ---
>  Documentation/devicetree/bindings/arm/rockchip.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
Johan Jonker Aug. 2, 2020, 7:21 p.m. UTC | #2
Hi David,

Add more maintainers and mail lists for all patches in this serie.

./scripts/get_maintainer.pl --noroles --norolestats --nogit-fallback
--nogit <patch1 patch2>

git send-email --suppress-cc all --annotate --to <..> --cc <..> <patch1
patch2>

On 7/31/20 1:20 AM, David Bauer wrote:
> This adds support for the NanoPi R2S from FriendlyARM.
> 
> Rockchip RK3328 SoC
> 1GB DDR4 RAM
> Gigabit Ethernet (WAN)
> Gigabit Ethernet (USB3) (LAN)
> USB 2.0 Host Port
> MicroSD slot
> Reset button
> WAN - LAN - SYS LED
> 
> Signed-off-by: David Bauer <mail@david-bauer.net>
> ---
> 
> Changes in v2:
>  - Use aligned memory for ethernet
>  - Fix GPO for sdio regulator
> 
>  arch/arm64/boot/dts/rockchip/Makefile         |   1 +
>  .../boot/dts/rockchip/rk3328-nanopi-r2s.dts   | 334 ++++++++++++++++++
>  2 files changed, 335 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
> 
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
> index b87b1f773083..20055c51e150 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -5,6 +5,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-roc-cc.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3326-odroid-go2.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-a1.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-evb.dtb
> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-nanopi-r2s.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-rock64.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-roc-cc.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-evb-act8846.dtb
> diff --git a/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts b/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
> new file mode 100644
> index 000000000000..9fd148423b9d
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
> @@ -0,0 +1,334 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2020 David Bauer <mail@david-bauer.net>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include "rk3328.dtsi"
> +
> +/ {
> +	model = "FriendlyARM NanoPi R2S";
> +	compatible = "friendlyarm,nanopi-r2s", "rockchip,rk3328";
> +
> +	chosen {
> +		stdout-path = "serial2:1500000n8";
> +	};
> +
> +	gmac_clkin: external-gmac-clock {
> +		compatible = "fixed-clock";
> +		clock-frequency = <125000000>;
> +		clock-output-names = "gmac_clkin";
> +		#clock-cells = <0>;
> +	};
> +

> +	vcc_sd: sdmmc-regulator {
> +		compatible = "regulator-fixed";
> +		gpio = <&gpio0 RK_PD6 GPIO_ACTIVE_LOW>;

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&sdmmc0m1_gpio>;

sort

> +		regulator-name = "vcc_sd";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		vin-supply = <&vcc_io>;
> +	};
> +
> +	vcc_sdio: sdmmcio-regulator {
> +		compatible = "regulator-gpio";
> +		gpios = <&gpio1 RK_PD4 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +		states = <1800000 0x1
> +			  3300000 0x0>;

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&sdio_vcc_pin>;

sort

> +		regulator-always-on;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;

> +		regulator-name = "vcc_sdio";

move regulator-name above regulator-always-on

> +		regulator-settling-time-us = <5000>;
> +		regulator-type = "voltage";
> +		vin-supply = <&vcc_io>;
> +	};
> +
> +	vcc_sys: vcc-sys {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc_sys";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +	};

sort node names
move regulators below

> +
> +	leds {
> +		compatible = "gpio-leds";

> +

remove empty line

> +		pinctrl-names = "default";

sort pinctrl-names below pinctrl-0

> +		pinctrl-0 = <&led_pins>;

use separate pinctrl nodes with consistent node names
	pinctrl-0 = <&lan_led_pin, &sys_led_pin, &wan_led_pin>;
> +
> +		sys {

sort node names/label

The prefered node name is '^led-[0-9a-f]$'.

sys_led: led-1 {

> +			gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
> +			label = "nanopi-r2s:red:sys";
> +		};
> +

> +		lan {

lan_led: led-0 {

> +			gpios = <&gpio2 RK_PB7 GPIO_ACTIVE_HIGH>;
> +			label = "nanopi-r2s:green:lan";
> +		};
> +

> +		wan {

wan_led: led-2 {

> +			gpios = <&gpio2 RK_PC2 GPIO_ACTIVE_HIGH>;
> +			label = "nanopi-r2s:green:wan";
> +		};
> +	};
> +

> +	gpio_keys {

sort node name

> +		compatible = "gpio-keys-polled";
> +		poll-interval = <100>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&button_pins>;
> +
> +		reset {
> +			label = "Reset Button";
> +			gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_LOW>;
> +			linux,code = <KEY_RESTART>;
> +			debounce-interval = <50>;
> +		};
> +	};
> +};
> +
> +&cpu0 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&cpu1 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&cpu2 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&cpu3 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&gmac2io {
> +	assigned-clocks = <&cru SCLK_MAC2IO>, <&cru SCLK_MAC2IO_EXT>;
> +	assigned-clock-parents = <&gmac_clkin>, <&gmac_clkin>;
> +	clock_in_out = "input";
> +	phy-supply = <&vcc_io>;
> +	phy-handle = <&rtl8211e>;
> +	phy-mode = "rgmii";

> +	pinctrl-names = "default";
> +	pinctrl-0 = <&rgmiim1_pins>;

sort

> +	snps,aal;
> +	snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
> +	snps,reset-active-low;
> +	snps,reset-delays-us = <0 10000 50000>;
> +	tx_delay = <0x24>;
> +	rx_delay = <0x18>;
> +	status = "okay";
> +
> +	mdio {
> +		compatible = "snps,dwmac-mdio";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		rtl8211e: ethernet-phy@0 {
> +			reg = <0>;

interrupts, reset ?

> +		};
> +	};
> +};
> +
> +&i2c1 {
> +	status = "okay";
> +
> +	rk805: rk805@18 {
> +		compatible = "rockchip,rk805";
> +		reg = <0x18>;
> +		interrupt-parent = <&gpio2>;
> +		interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
> +		#clock-cells = <1>;
> +		clock-output-names = "xin32k", "rk805-clkout2";
> +		gpio-controller;
> +		#gpio-cells = <2>;

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pmic_int_l>;

sort

> +		rockchip,system-power-controller;
> +		wakeup-source;
> +
> +		vcc1-supply = <&vcc_sys>;
> +		vcc2-supply = <&vcc_sys>;
> +		vcc3-supply = <&vcc_sys>;
> +		vcc4-supply = <&vcc_sys>;
> +		vcc5-supply = <&vcc_io>;
> +		vcc6-supply = <&vcc_sys>;
> +
> +		regulators {
> +			vdd_logic: DCDC_REG1 {
> +				regulator-name = "vdd_logic";
> +				regulator-min-microvolt = <712500>;
> +				regulator-max-microvolt = <1450000>;
> +				regulator-ramp-delay = <12500>;
> +				regulator-always-on;
> +				regulator-boot-on;

empty line between a node

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1000000>;
> +				};
> +			};
> +
> +			vdd_arm: DCDC_REG2 {
> +				regulator-name = "vdd_arm";
> +				regulator-min-microvolt = <712500>;
> +				regulator-max-microvolt = <1450000>;
> +				regulator-ramp-delay = <12500>;
> +				regulator-always-on;
> +				regulator-boot-on;

same

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <950000>;
> +				};
> +			};
> +
> +			vcc_ddr: DCDC_REG3 {
> +				regulator-name = "vcc_ddr";
> +				regulator-always-on;
> +				regulator-boot-on;

same

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +				};
> +			};
> +
> +			vcc_io: DCDC_REG4 {
> +				regulator-name = "vcc_io";
> +				regulator-min-microvolt = <3300000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-always-on;
> +				regulator-boot-on;

same

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <3300000>;
> +				};
> +			};
> +
> +			vcc_18: LDO_REG1 {
> +				regulator-name = "vcc_18";
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <1800000>;
> +				regulator-always-on;
> +				regulator-boot-on;

same

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1800000>;
> +				};
> +			};
> +
> +			vcc18_emmc: LDO_REG2 {
> +				regulator-name = "vcc18_emmc";
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <1800000>;
> +				regulator-always-on;
> +				regulator-boot-on;

same

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1800000>;
> +				};
> +			};
> +
> +			vdd_10: LDO_REG3 {
> +				regulator-name = "vdd_10";
> +				regulator-min-microvolt = <1000000>;
> +				regulator-max-microvolt = <1000000>;
> +				regulator-always-on;
> +				regulator-boot-on;

same

> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1000000>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
> +&io_domains {

> +	status = "okay";

status below

> +
> +	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>;

sort properties, move this to top

> +};
> +
> +&pinctrl {

> +	leds {

sort node names

> +		led_pins: led-pins {

use a separate sub node for each led
use a consistent node name

	lan_led_pin: lan-led-pin {}
        sys_led_pin: sys-led-pin {}
        wan_led_pin: wan-led-pin {}
> +			rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>,
> +							<2 RK_PB7 RK_FUNC_GPIO &pcfg_pull_none>,
> +							<2 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;

(fix alignment)

> +		};
> +	};
> +
> +	button {
> +		button_pins: button-pins {
> +			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
> +		};
> +	};
> +
> +	pmic {
> +		pmic_int_l: pmic-int-l {
> +			rockchip,pins = <2 RK_PA6 RK_FUNC_GPIO &pcfg_pull_up>;
> +		};
> +	};
> +
> +	sd {
> +		sdio_vcc_pin: sdio-vcc-pin {
> +			rockchip,pins = <1 RK_PD4 RK_FUNC_GPIO &pcfg_pull_up>;
> +		};
> +	};
> +};
> +

> +&sdmmc {
> +	bus-width = <4>;

> +	cap-mmc-highspeed;

remove
board has only micro SD card

> +	cap-sd-highspeed;
> +	disable-wp;

> +	max-frequency = <150000000>;

already in dtsi

> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;

sort

> +	vmmc-supply = <&vcc_sd>;
> +	vqmmc-supply = <&vcc_sdio>;
> +	status = "okay";
> +};

	sdmmc: mmc@ff500000 {
		compatible = "rockchip,rk3328-dw-mshc", "rockchip,rk3288-dw-mshc";
		reg = <0x0 0xff500000 0x0 0x4000>;
		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>,
			 <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
		clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
		fifo-depth = <0x100>;
		max-frequency = <150000000>;
		status = "disabled";
	};

> +
> +&tsadc {
> +	rockchip,hw-tshut-mode = <0>;
> +	rockchip,hw-tshut-polarity = <0>;
> +	status = "okay";
> +};
> +
> +&uart2 {
> +	status = "okay";
> +};
> +

> +&u2phy {

sort node names

> +	status = "okay";
> +
> +	u2phy_host: host-port {
> +		status = "okay";
> +	};

u2phy_otg ?

> +};
> +

&usb20_otg {               ?
	dr_mode = "host";  ?
	status = "okay";   ?
};

Do we need this as well?

> +&usb_host0_ehci {
> +	status = "okay";
> +};
> +
> +&usb_host0_ohci {
> +	status = "okay";
> +};
>
Robin Murphy Aug. 2, 2020, 9:57 p.m. UTC | #3
Hi David,

On 2020-07-31 00:20, David Bauer wrote:
> Add devicetree binding documentation for the FriendlyARM NanoPi R2S.
> 
> Signed-off-by: David Bauer <mail@david-bauer.net>
> ---
>   Documentation/devicetree/bindings/arm/rockchip.yaml | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml b/Documentation/devicetree/bindings/arm/rockchip.yaml
> index d4a4045092df..b17931ec2d86 100644
> --- a/Documentation/devicetree/bindings/arm/rockchip.yaml
> +++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
> @@ -104,6 +104,11 @@ properties:
>                 - firefly,roc-rk3399-pc-mezzanine
>             - const: rockchip,rk3399
>   
> +      - description: FriendlyARM NanoPi R2S

Nit: as the context below hints at, the company call themselves 
"FriendlyElec" these days - certainly since long before this board 
existed - so for consistency we should probably use that name in the 
description (but keep the established vendor prefix).

Robin.

> +        items:
> +          - const: friendlyarm,nanopi-r2s
> +          - const: rockchip,rk3328
> +
>         - description: FriendlyElec NanoPi4 series boards
>           items:
>             - enum:
>
Robin Murphy Aug. 2, 2020, 10:01 p.m. UTC | #4
On 2020-07-31 00:20, David Bauer wrote:
> This adds support for the NanoPi R2S from FriendlyARM.
> 
> Rockchip RK3328 SoC
> 1GB DDR4 RAM
> Gigabit Ethernet (WAN)
> Gigabit Ethernet (USB3) (LAN)
> USB 2.0 Host Port
> MicroSD slot
> Reset button
> WAN - LAN - SYS LED

Neat! Mine turned up last week (far earlier than expected, yay!), and I 
was going to do some DT hacking, but here it is already :)

> Signed-off-by: David Bauer <mail@david-bauer.net>
> ---
> 
> Changes in v2:
>   - Use aligned memory for ethernet
>   - Fix GPO for sdio regulator
> 
>   arch/arm64/boot/dts/rockchip/Makefile         |   1 +
>   .../boot/dts/rockchip/rk3328-nanopi-r2s.dts   | 334 ++++++++++++++++++
>   2 files changed, 335 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
> 
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
> index b87b1f773083..20055c51e150 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -5,6 +5,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-roc-cc.dtb
>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3326-odroid-go2.dtb
>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-a1.dtb
>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-evb.dtb
> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-nanopi-r2s.dtb
>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-rock64.dtb
>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-roc-cc.dtb
>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-evb-act8846.dtb
> diff --git a/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts b/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
> new file mode 100644
> index 000000000000..9fd148423b9d
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
> @@ -0,0 +1,334 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2020 David Bauer <mail@david-bauer.net>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include "rk3328.dtsi"
> +
> +/ {
> +	model = "FriendlyARM NanoPi R2S";

Same comment as for the binding.

> +	compatible = "friendlyarm,nanopi-r2s", "rockchip,rk3328";
> +
> +	chosen {
> +		stdout-path = "serial2:1500000n8";
> +	};
> +
> +	gmac_clkin: external-gmac-clock {
> +		compatible = "fixed-clock";
> +		clock-frequency = <125000000>;
> +		clock-output-names = "gmac_clkin";
> +		#clock-cells = <0>;
> +	};
> +
> +	vcc_sd: sdmmc-regulator {
> +		compatible = "regulator-fixed";
> +		gpio = <&gpio0 RK_PD6 GPIO_ACTIVE_LOW>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&sdmmc0m1_gpio>;
> +		regulator-name = "vcc_sd";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		vin-supply = <&vcc_io>;
> +	};
> +
> +	vcc_sdio: sdmmcio-regulator {

This is "vcc_io_sd" per the schematic.

> +		compatible = "regulator-gpio";
> +		gpios = <&gpio1 RK_PD4 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +		states = <1800000 0x1
> +			  3300000 0x0>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&sdio_vcc_pin>;
> +		regulator-always-on;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-name = "vcc_sdio";
> +		regulator-settling-time-us = <5000>;
> +		regulator-type = "voltage";
> +		vin-supply = <&vcc_io>;

Strictly the supply here is vdd_5v - vcc_io is only driving the bias 
circuitry for the regulator adjustment.

> +	};
> +
> +	vcc_sys: vcc-sys {

This is "vdd_5v".

> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc_sys";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&led_pins>;
> +
> +		sys {
> +			gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
> +			label = "nanopi-r2s:red:sys";
> +		};
> +
> +		lan {
> +			gpios = <&gpio2 RK_PB7 GPIO_ACTIVE_HIGH>;

This seems to match the schematic, however in practice the GPIO seems to 
have a mind of its own and not respond to the LED settings - are we 
missing something with the pinctrl perhaps?

> +			label = "nanopi-r2s:green:lan";
> +		};
> +
> +		wan {
> +			gpios = <&gpio2 RK_PC2 GPIO_ACTIVE_HIGH>;
> +			label = "nanopi-r2s:green:wan";
> +		};
> +	};
> +
> +	gpio_keys {
> +		compatible = "gpio-keys-polled";

Does this need to be polled? I would have thought regular 
interrupt-based gpio-keys should work, to avoid the overhead of polling 
for something (relatively) incredibly rare, but perhaps I'm wrong :/

> +		poll-interval = <100>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&button_pins>;
> +
> +		reset {
> +			label = "Reset Button";
> +			gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_LOW>;
> +			linux,code = <KEY_RESTART>;
> +			debounce-interval = <50>;
> +		};
> +	};
> +};
> +
> +&cpu0 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&cpu1 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&cpu2 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&cpu3 {
> +	cpu-supply = <&vdd_arm>;
> +};
> +
> +&gmac2io {
> +	assigned-clocks = <&cru SCLK_MAC2IO>, <&cru SCLK_MAC2IO_EXT>;
> +	assigned-clock-parents = <&gmac_clkin>, <&gmac_clkin>;
> +	clock_in_out = "input";
> +	phy-supply = <&vcc_io>;
> +	phy-handle = <&rtl8211e>;
> +	phy-mode = "rgmii";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&rgmiim1_pins>;
> +	snps,aal;

Is this needed over and above the txpbl fix present in the main DTSI? I 
forget exactly where all those discussions ended up, but if it matters 
here then it probably matters for all RK3328 boards.

> +	snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
> +	snps,reset-active-low;
> +	snps,reset-delays-us = <0 10000 50000>;

Since you're describing the phy already, you can convert these to 
generic reset specifiers on the phy node itself (shame we don't have an 
interrupt wired up, oh well...)

> +	tx_delay = <0x24>;
> +	rx_delay = <0x18>;
> +	status = "okay";
> +
> +	mdio {
> +		compatible = "snps,dwmac-mdio";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		rtl8211e: ethernet-phy@0 {
> +			reg = <0>;

Is that right? The schematic says the phy is strapped for address 1 
(although 0 probably does manage to work since it should be interpreted 
as a broadcast address).

> +		};
> +	};
> +};
> +
> +&i2c1 {
> +	status = "okay";
> +
> +	rk805: rk805@18 {
> +		compatible = "rockchip,rk805";
> +		reg = <0x18>;
> +		interrupt-parent = <&gpio2>;
> +		interrupts = <6 IRQ_TYPE_LEVEL_LOW>;

The schematic says GPIO1_D0 for this.

> +		#clock-cells = <1>;
> +		clock-output-names = "xin32k", "rk805-clkout2";
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pmic_int_l>;
> +		rockchip,system-power-controller;
> +		wakeup-source;
> +
> +		vcc1-supply = <&vcc_sys>;
> +		vcc2-supply = <&vcc_sys>;
> +		vcc3-supply = <&vcc_sys>;
> +		vcc4-supply = <&vcc_sys>;
> +		vcc5-supply = <&vcc_io>;
> +		vcc6-supply = <&vcc_sys>;
> +
> +		regulators {
> +			vdd_logic: DCDC_REG1 {

This is "vdd_log".

> +				regulator-name = "vdd_logic";
> +				regulator-min-microvolt = <712500>;
> +				regulator-max-microvolt = <1450000>;
> +				regulator-ramp-delay = <12500>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1000000>;
> +				};
> +			};
> +
> +			vdd_arm: DCDC_REG2 {
> +				regulator-name = "vdd_arm";
> +				regulator-min-microvolt = <712500>;
> +				regulator-max-microvolt = <1450000>;
> +				regulator-ramp-delay = <12500>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <950000>;
> +				};
> +			};
> +
> +			vcc_ddr: DCDC_REG3 {
> +				regulator-name = "vcc_ddr";
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +				};
> +			};
> +
> +			vcc_io: DCDC_REG4 {

This is "vcc_io_33".

> +				regulator-name = "vcc_io";
> +				regulator-min-microvolt = <3300000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <3300000>;
> +				};
> +			};
> +
> +			vcc_18: LDO_REG1 {
> +				regulator-name = "vcc_18";
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <1800000>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1800000>;
> +				};
> +			};
> +
> +			vcc18_emmc: LDO_REG2 {
> +				regulator-name = "vcc18_emmc";
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <1800000>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1800000>;
> +				};
> +			};
> +
> +			vdd_10: LDO_REG3 {
> +				regulator-name = "vdd_10";
> +				regulator-min-microvolt = <1000000>;
> +				regulator-max-microvolt = <1000000>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +				regulator-state-mem {
> +					regulator-on-in-suspend;
> +					regulator-suspend-microvolt = <1000000>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
> +&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>;
> +};
> +
> +&pinctrl {
> +	leds {
> +		led_pins: led-pins {
> +			rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>,
> +							<2 RK_PB7 RK_FUNC_GPIO &pcfg_pull_none>,
> +							<2 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
> +		};
> +	};
> +
> +	button {
> +		button_pins: button-pins {
> +			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
> +		};
> +	};
> +
> +	pmic {
> +		pmic_int_l: pmic-int-l {
> +			rockchip,pins = <2 RK_PA6 RK_FUNC_GPIO &pcfg_pull_up>;
> +		};
> +	};
> +
> +	sd {
> +		sdio_vcc_pin: sdio-vcc-pin {
> +			rockchip,pins = <1 RK_PD4 RK_FUNC_GPIO &pcfg_pull_up>;
> +		};
> +	};
> +};
> +

It shouldn't hurt to enable PWM2 from the outset to make mucking about 
with the fan easier.

> +&sdmmc {
> +	bus-width = <4>;
> +	cap-mmc-highspeed;
> +	cap-sd-highspeed;

How about UHS modes, since we have the requisite I/O voltage support?

> +	disable-wp;

I believe this property is only meant for full-size MMC/SD sockets where 
write-protect functionality is expected but somehow broken. For micro-SD 
sockets the SoC pin should be hard-wired to write-enable anyway and thus 
it shouldn't need to be stated.

> +	max-frequency = <150000000>;

This is in the DTSI already.

> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;
> +	vmmc-supply = <&vcc_sd>;
> +	vqmmc-supply = <&vcc_sdio>;
> +	status = "okay";
> +};
> +
> +&tsadc {
> +	rockchip,hw-tshut-mode = <0>;
> +	rockchip,hw-tshut-polarity = <0>;
> +	status = "okay";
> +};
> +
> +&uart2 {
> +	status = "okay";
> +};
> +
> +&u2phy {
> +	status = "okay";
> +
> +	u2phy_host: host-port {

Just reference this by label directly, rather than as a child node here 
(especially since redefining the existing label is a bit confusing).

> +		status = "okay";
> +	};
> +};

No reason not to enable the OTG port either - I've hacked that in with 
g_serial for a cheeky console while powering the board from my laptop 
and it works fine.

Cheers,
Robin.

> +
> +&usb_host0_ehci {
> +	status = "okay";
> +};
> +
> +&usb_host0_ohci {
> +	status = "okay";
> +};
>
David Bauer Aug. 6, 2020, 6:57 a.m. UTC | #5
Hi Robin,

thanks for your review. Only adressing some non-formal comments below.

On 8/3/20 12:01 AM, Robin Murphy wrote:
> 
> This seems to match the schematic, however in practice the GPIO seems to have a mind of its own and not respond to the LED settings - are we missing something with the pinctrl perhaps?

Hmm, this is strange. It works fine on my unit (with the current OpenWrt release). Can you test this and report back?

> 
>> +            label = "nanopi-r2s:green:lan";
>> +        };
>> +
>> +        wan {
>> +            gpios = <&gpio2 RK_PC2 GPIO_ACTIVE_HIGH>;
>> +            label = "nanopi-r2s:green:wan";
>> +        };
>> +    };
>> +
>> +    gpio_keys {
>> +        compatible = "gpio-keys-polled";
> 
> Does this need to be polled? I would have thought regular interrupt-based gpio-keys should work, to avoid the overhead of polling for something (relatively) incredibly rare, but perhaps I'm wrong :/

To be honest, I've missed that this is still polled. I've had this set to polled mode, as I've
had some issues (were to dumb) to get the pinmux going. I'll switch this to interrupt triggered and report back.

> 
>> +        poll-interval = <100>;
>> +
>> +        pinctrl-names = "default";
>> +        pinctrl-0 = <&button_pins>;
>> +
>> +        reset {
>> +            label = "Reset Button";
>> +            gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_LOW>;
>> +            linux,code = <KEY_RESTART>;
>> +            debounce-interval = <50>;
>> +        };
>> +    };
>> +};
>> +
>> +&cpu0 {
>> +    cpu-supply = <&vdd_arm>;
>> +};
>> +
>> +&cpu1 {
>> +    cpu-supply = <&vdd_arm>;
>> +};
>> +
>> +&cpu2 {
>> +    cpu-supply = <&vdd_arm>;
>> +};
>> +
>> +&cpu3 {
>> +    cpu-supply = <&vdd_arm>;
>> +};
>> +
>> +&gmac2io {
>> +    assigned-clocks = <&cru SCLK_MAC2IO>, <&cru SCLK_MAC2IO_EXT>;
>> +    assigned-clock-parents = <&gmac_clkin>, <&gmac_clkin>;
>> +    clock_in_out = "input";
>> +    phy-supply = <&vcc_io>;
>> +    phy-handle = <&rtl8211e>;
>> +    phy-mode = "rgmii";
>> +    pinctrl-names = "default";
>> +    pinctrl-0 = <&rgmiim1_pins>;
>> +    snps,aal;
> 
> Is this needed over and above the txpbl fix present in the main DTSI? I forget exactly where all those discussions ended up, but if it matters here then it probably matters for all RK3328 boards.

It seems to matter, as otherwise forwards from LAN to WAN will result in tx_fifo errors.

> 
>> +    snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
>> +    snps,reset-active-low;
>> +    snps,reset-delays-us = <0 10000 50000>;
> 
> Since you're describing the phy already, you can convert these to generic reset specifiers on the phy node itself (shame we don't have an interrupt wired up, oh well...)

Yup, I've forgotten that there's reset-gpio bindings for the PHY itself. 

> 
>> +    tx_delay = <0x24>;
>> +    rx_delay = <0x18>;
>> +    status = "okay";
>> +
>> +    mdio {
>> +        compatible = "snps,dwmac-mdio";
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        rtl8211e: ethernet-phy@0 {
>> +            reg = <0>;
> 
> Is that right? The schematic says the phy is strapped for address 1 (although 0 probably does manage to work since it should be interpreted as a broadcast address).

I'll test this.

> 
>> +        };
>> +    };
>> +};
>> +
>> +&i2c1 {
>> +    status = "okay";
>> +
>> +    rk805: rk805@18 {
>> +        compatible = "rockchip,rk805";
>> +        reg = <0x18>;
>> +        interrupt-parent = <&gpio2>;
>> +        interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
> 
> The schematic says GPIO1_D0 for this.

You are right, I'll fix this.

>> +
> 
> It shouldn't hurt to enable PWM2 from the outset to make mucking about with the fan easier.

I've seen reports of people having Fans on their NanoPi R2S, my unit does not have such 

> 
>> +&sdmmc {
>> +    bus-width = <4>;
>> +    cap-mmc-highspeed;
>> +    cap-sd-highspeed;
> 
> How about UHS modes, since we have the requisite I/O voltage support?

I'll look into this.

> 
>> +    disable-wp;
> 
> I believe this property is only meant for full-size MMC/SD sockets where write-protect functionality is expected but somehow broken. For micro-SD sockets the SoC pin should be hard-wired to write-enable anyway and thus it shouldn't need to be stated.

Thanks for this explanation, I'll remove and re-test.

> 
>> +    max-frequency = <150000000>;
> 
> This is in the DTSI already.
> 
>> +    pinctrl-names = "default";
>> +    pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;
>> +    vmmc-supply = <&vcc_sd>;
>> +    vqmmc-supply = <&vcc_sdio>;
>> +    status = "okay";
>> +};
>> +
>> +&tsadc {
>> +    rockchip,hw-tshut-mode = <0>;
>> +    rockchip,hw-tshut-polarity = <0>;
>> +    status = "okay";
>> +};
>> +
>> +&uart2 {
>> +    status = "okay";
>> +};
>> +
>> +&u2phy {
>> +    status = "okay";
>> +
>> +    u2phy_host: host-port {
> 
> Just reference this by label directly, rather than as a child node here (especially since redefining the existing label is a bit confusing).
> 
>> +        status = "okay";
>> +    };
>> +};
> 
> No reason not to enable the OTG port either - I've hacked that in with g_serial for a cheeky console while powering the board from my laptop and it works fine.

Ouch, I've completely missed the micro-USB port is wired up to the OTG port.

I'll follow up with a v3 in the coming days. Thanks for your feedback!

Best wishes
David

> 
> Cheers,
> Robin.
> 
>> +
>> +&usb_host0_ehci {
>> +    status = "okay";
>> +};
>> +
>> +&usb_host0_ohci {
>> +    status = "okay";
>> +};
>>
Robin Murphy Aug. 8, 2020, 10 p.m. UTC | #6
On 2020-08-06 07:57, David Bauer wrote:
> Hi Robin,
> 
> thanks for your review. Only adressing some non-formal comments below.
> 
> On 8/3/20 12:01 AM, Robin Murphy wrote:
>>
>> This seems to match the schematic, however in practice the GPIO seems to have a mind of its own and not respond to the LED settings - are we missing something with the pinctrl perhaps?
> 
> Hmm, this is strange. It works fine on my unit (with the current OpenWrt release). Can you test this and report back?

It seems like somehow that particular GPIO doesn't get configured 
properly and is still in its default out-of-reset state as an input. 
Poking the GPIO from sysfs works as expected, and in fact just unbinding 
and rebinding the leds-gpio driver also manages to kick things into 
shape. Clearly there's some subtle driver-level issue, but at least it's 
not a DT problem :)

>>> +            label = "nanopi-r2s:green:lan";
>>> +        };
>>> +
>>> +        wan {
>>> +            gpios = <&gpio2 RK_PC2 GPIO_ACTIVE_HIGH>;
>>> +            label = "nanopi-r2s:green:wan";
>>> +        };
>>> +    };
>>> +
>>> +    gpio_keys {
>>> +        compatible = "gpio-keys-polled";
>>
>> Does this need to be polled? I would have thought regular interrupt-based gpio-keys should work, to avoid the overhead of polling for something (relatively) incredibly rare, but perhaps I'm wrong :/
> 
> To be honest, I've missed that this is still polled. I've had this set to polled mode, as I've
> had some issues (were to dumb) to get the pinmux going. I'll switch this to interrupt triggered and report back.
> 
>>
>>> +        poll-interval = <100>;
>>> +
>>> +        pinctrl-names = "default";
>>> +        pinctrl-0 = <&button_pins>;
>>> +
>>> +        reset {
>>> +            label = "Reset Button";
>>> +            gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_LOW>;
>>> +            linux,code = <KEY_RESTART>;
>>> +            debounce-interval = <50>;
>>> +        };
>>> +    };
>>> +};
>>> +
>>> +&cpu0 {
>>> +    cpu-supply = <&vdd_arm>;
>>> +};
>>> +
>>> +&cpu1 {
>>> +    cpu-supply = <&vdd_arm>;
>>> +};
>>> +
>>> +&cpu2 {
>>> +    cpu-supply = <&vdd_arm>;
>>> +};
>>> +
>>> +&cpu3 {
>>> +    cpu-supply = <&vdd_arm>;
>>> +};
>>> +
>>> +&gmac2io {
>>> +    assigned-clocks = <&cru SCLK_MAC2IO>, <&cru SCLK_MAC2IO_EXT>;
>>> +    assigned-clock-parents = <&gmac_clkin>, <&gmac_clkin>;
>>> +    clock_in_out = "input";
>>> +    phy-supply = <&vcc_io>;
>>> +    phy-handle = <&rtl8211e>;
>>> +    phy-mode = "rgmii";
>>> +    pinctrl-names = "default";
>>> +    pinctrl-0 = <&rgmiim1_pins>;
>>> +    snps,aal;
>>
>> Is this needed over and above the txpbl fix present in the main DTSI? I forget exactly where all those discussions ended up, but if it matters here then it probably matters for all RK3328 boards.
> 
> It seems to matter, as otherwise forwards from LAN to WAN will result in tx_fifo errors.

On second look it's already present in half the existing RK3328 DTs 
(including the one I wrote, ahem...), so probably does deserve promoting 
into the DTSI.

>>> +    snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
>>> +    snps,reset-active-low;
>>> +    snps,reset-delays-us = <0 10000 50000>;
>>
>> Since you're describing the phy already, you can convert these to generic reset specifiers on the phy node itself (shame we don't have an interrupt wired up, oh well...)
> 
> Yup, I've forgotten that there's reset-gpio bindings for the PHY itself.
> 
>>
>>> +    tx_delay = <0x24>;
>>> +    rx_delay = <0x18>;
>>> +    status = "okay";
>>> +
>>> +    mdio {
>>> +        compatible = "snps,dwmac-mdio";
>>> +        #address-cells = <1>;
>>> +        #size-cells = <0>;
>>> +
>>> +        rtl8211e: ethernet-phy@0 {
>>> +            reg = <0>;
>>
>> Is that right? The schematic says the phy is strapped for address 1 (although 0 probably does manage to work since it should be interpreted as a broadcast address).
> 
> I'll test this.
> 
>>
>>> +        };
>>> +    };
>>> +};
>>> +
>>> +&i2c1 {
>>> +    status = "okay";
>>> +
>>> +    rk805: rk805@18 {
>>> +        compatible = "rockchip,rk805";
>>> +        reg = <0x18>;
>>> +        interrupt-parent = <&gpio2>;
>>> +        interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
>>
>> The schematic says GPIO1_D0 for this.
> 
> You are right, I'll fix this.
> 
>>> +
>>
>> It shouldn't hurt to enable PWM2 from the outset to make mucking about with the fan easier.
> 
> I've seen reports of people having Fans on their NanoPi R2S, my unit does not have such

Yeah, mine came with the version 2 heatsink/fan fitted, although upon 
investigation it turns out the PWM is next to useless (something's off 
with rise times in the external MOSFET switching setup) and the fan 
connector may as well just be treated as GPIO-controlled anyway.

>>> +&sdmmc {
>>> +    bus-width = <4>;
>>> +    cap-mmc-highspeed;
>>> +    cap-sd-highspeed;
>>
>> How about UHS modes, since we have the requisite I/O voltage support?
> 
> I'll look into this.

FWIW SDR104 seems to be working fine for me, with the PMIC interrupt 
corrected so as not to break the regulator.

>>
>>> +    disable-wp;
>>
>> I believe this property is only meant for full-size MMC/SD sockets where write-protect functionality is expected but somehow broken. For micro-SD sockets the SoC pin should be hard-wired to write-enable anyway and thus it shouldn't need to be stated.
> 
> Thanks for this explanation, I'll remove and re-test.

Actually I think I was mistaken there - having double-checked the 
binding definition and datasheet it looks like RK3328 doesn't expose the 
WP function on any pin at all, so by the letter of the binding this 
*should* be specified for correctness (since we don't necessarily know 
for sure that the controller's internal WP line isn't left floating). 
Sorry for the confusion.

Cheers,
Robin.

>>
>>> +    max-frequency = <150000000>;
>>
>> This is in the DTSI already.
>>
>>> +    pinctrl-names = "default";
>>> +    pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;
>>> +    vmmc-supply = <&vcc_sd>;
>>> +    vqmmc-supply = <&vcc_sdio>;
>>> +    status = "okay";
>>> +};
>>> +
>>> +&tsadc {
>>> +    rockchip,hw-tshut-mode = <0>;
>>> +    rockchip,hw-tshut-polarity = <0>;
>>> +    status = "okay";
>>> +};
>>> +
>>> +&uart2 {
>>> +    status = "okay";
>>> +};
>>> +
>>> +&u2phy {
>>> +    status = "okay";
>>> +
>>> +    u2phy_host: host-port {
>>
>> Just reference this by label directly, rather than as a child node here (especially since redefining the existing label is a bit confusing).
>>
>>> +        status = "okay";
>>> +    };
>>> +};
>>
>> No reason not to enable the OTG port either - I've hacked that in with g_serial for a cheeky console while powering the board from my laptop and it works fine.
> 
> Ouch, I've completely missed the micro-USB port is wired up to the OTG port.
> 
> I'll follow up with a v3 in the coming days. Thanks for your feedback!
> 
> Best wishes
> David
> 
>>
>> Cheers,
>> Robin.
>>
>>> +
>>> +&usb_host0_ehci {
>>> +    status = "okay";
>>> +};
>>> +
>>> +&usb_host0_ohci {
>>> +    status = "okay";
>>> +};
>>>
> 
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml b/Documentation/devicetree/bindings/arm/rockchip.yaml
index d4a4045092df..b17931ec2d86 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.yaml
+++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
@@ -104,6 +104,11 @@  properties:
               - firefly,roc-rk3399-pc-mezzanine
           - const: rockchip,rk3399
 
+      - description: FriendlyARM NanoPi R2S
+        items:
+          - const: friendlyarm,nanopi-r2s
+          - const: rockchip,rk3328
+
       - description: FriendlyElec NanoPi4 series boards
         items:
           - enum: