Re: [PATCH] ARM: dts: imx: Add Y Soft IOTA Draco, Hydra and Ursa boards

["Vokáč Michal" <Michal.Vokac@ysoft.com>]

On 19.11.2018 15:35, Vokáč Michal wrote:
> On 12.11.2018 17:41, Rob Herring wrote:
>> On Thu, Nov 01, 2018 at 03:43:26PM +0000, Vokáč Michal wrote:
>>> These are i.MX6S/DL based SBCs embedded in various Y Soft products.
>>> All share the same board design but have slightly different HW
>>> configuration.
>>>
>>> Ursa
>>> - i.MX6S SoC, 512MB RAM DDR3, 4GB eMMC, microSD
>>> - parallel WVGA 7" LCD with touch panel
>>> - 1x Eth (QCA8334 switch)
>>> - USB OTG
>>> - USB host (micro-B)
>>>
>>> Draco
>>> - i.MX6S SoC, 512MB RAM DDR3, 4GB eMMC, microSD
>>> - parallel WVGA 7" LCD with touch panel
>>> - 2x Eth (QCA8334 switch)
>>> - USB OTG
>>> - USB host (micro-B)
>>> - RGB LED (I2C LP5562)
>>> - 3.5mm audio jack + codec (LM49350)
>>>
>>> Hydra
>>> - i.MX6DL SoC, 2GB RAM DDR3, 4GB eMMC, microSD
>>> - I2C OLED display, capacitive matrix keys
>>> - 2x Eth (QCA8334 switch)
>>> - USB OTG
>>> - RGB LED (I2C LP5562)
>>> - 3.5mm audio jack + codec (LM49350)
>>> - HDMI
>>> - miniPCIe slot
>>>
>>> Cc: Andrew Lunn <andrew@lunn.ch>
>>> Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
>>> ---
>>>
>>> All the boards are booting fine but not everything is enabled/supported
>>> yet though. There is few things that will need some effort to get them
>>> fully working.
>>>
>>>    - HDMI: nothing specific, it just does not have the priority
>>>    - OLED display: reset signal inversion, wrong display resolution,...
>>>    - capacitive keys: polled driver for MPR121 needed as we do not have
>>>      the interrupt line
>>>    - Eth switch: need tweaks in i.MX RGMII pin group control registers
>>>    - audio codec: no existing driver yet (in mainline)
>>>
>>> So expect patches targeting the mentioned issues and updates to the dts
>>> files enabling additional HW.
>>>    
>>> CC-ing Andrew since he was interested in this board as it has a DSA
>>> Ethernet switch populated.
>>>
>>> Thanks,
>>> Michal
>>>
>>>    arch/arm/boot/dts/Makefile                 |   3 +
>>>    arch/arm/boot/dts/imx6dl-yapp4-common.dtsi | 535 +++++++++++++++++++++++++++++
>>>    arch/arm/boot/dts/imx6dl-yapp4-draco.dts   |  57 +++
>>>    arch/arm/boot/dts/imx6dl-yapp4-hydra.dts   |  33 ++
>>>    arch/arm/boot/dts/imx6dl-yapp4-ursa.dts    |  53 +++
>>>    5 files changed, 681 insertions(+)
>>>    create mode 100644 arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
>>>    create mode 100644 arch/arm/boot/dts/imx6dl-yapp4-draco.dts
>>>    create mode 100644 arch/arm/boot/dts/imx6dl-yapp4-hydra.dts
>>>    create mode 100644 arch/arm/boot/dts/imx6dl-yapp4-ursa.dts
>>>
>>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>>> index b5bd3de..cf24410 100644
>>> --- a/arch/arm/boot/dts/Makefile
>>> +++ b/arch/arm/boot/dts/Makefile
>>> @@ -441,6 +441,9 @@ dtb-$(CONFIG_SOC_IMX6Q) += \
>>>    	imx6dl-wandboard.dtb \
>>>    	imx6dl-wandboard-revb1.dtb \
>>>    	imx6dl-wandboard-revd1.dtb \
>>> +	imx6dl-yapp4-draco.dtb \
>>> +	imx6dl-yapp4-hydra.dtb \
>>> +	imx6dl-yapp4-ursa.dtb \
>>>    	imx6q-apalis-eval.dtb \
>>>    	imx6q-apalis-ixora.dtb \
>>>    	imx6q-apalis-ixora-v1.1.dtb \
>>> diff --git a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
>>> new file mode 100644
>>> index 0000000..9925523
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
>>> @@ -0,0 +1,535 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +//
>>> +// Copyright (C) 2015-2018 Y Soft Corporation, a.s.
>>> +
>>> +#include <dt-bindings/gpio/gpio.h>
>>> +#include <dt-bindings/pwm/pwm.h>
>>> +
>>> +/ {
>>> +	backlight: backlight {
>>> +		compatible = "pwm-backlight";
>>> +		pwms = <&pwm1 0 500000 PWM_POLARITY_INVERTED>;
>>> +		brightness-levels = <0 32 64 128 255>;
>>> +		default-brightness-level = <32>;
>>> +		num-interpolated-steps = <8>;
>>> +		power-supply = <&sw2_reg>;
>>> +		status = "disabled";
>>> +	};
>>> +
>>> +	lcd_display: display {
>>> +		compatible = "fsl,imx-parallel-display";
>>> +		#address-cells = <1>;
>>> +		#size-cells = <0>;
>>> +		interface-pix-fmt = "rgb24";
>>> +		pinctrl-names = "default";
>>> +		pinctrl-0 = <&pinctrl_ipu1>;
>>> +		status = "disabled";
>>> +
>>> +		port@0 {
>>> +			reg = <0>;
>>> +
>>> +			lcd_display_in: endpoint {
>>> +				remote-endpoint = <&ipu1_di0_disp0>;
>>> +			};
>>> +		};
>>> +
>>> +		port@1 {
>>> +			reg = <1>;
>>> +
>>> +			lcd_display_out: endpoint {
>>> +				remote-endpoint = <&lcd_panel_in>;
>>> +			};
>>> +		};
>>> +	};
>>> +
>>> +	panel: panel {
>>> +		compatible = "dataimage,scf0700c48ggu18";
>>> +		power-supply = <&sw2_reg>;
>>> +		status = "disabled";
>>> +
>>> +		port {
>>> +			lcd_panel_in: endpoint {
>>> +				remote-endpoint = <&lcd_display_out>;
>>> +			};
>>> +		};
>>> +	};
>>> +
>>> +	regulators {
>>> +		compatible = "simple-bus";
>>> +		#address-cells = <1>;
>>> +		#size-cells = <0>;
>>
>> These are all just individual board level regulators? If so, drop the
>> simple-bus and move these up to the top-level.
> 
> Yes, individual regulators. I will move it.
> 
>>> +
>>> +		reg_usb_otg_vbus: regulator@0 {
>>> +			compatible = "regulator-fixed";
>>> +			reg = <0>;
>>
>> Dropping reg and unit-address in the process.
> 
> OK, I will remove it.
> 
>>> +			pinctrl-names = "default";
>>> +			pinctrl-0 = <&pinctrl_usbotg_vbus>;
>>> +			regulator-name = "usb_otg_vbus";
>>> +			regulator-min-microvolt = <5000000>;
>>> +			regulator-max-microvolt = <5000000>;
>>> +			gpio = <&gpio3 22 GPIO_ACTIVE_HIGH>;
>>> +			enable-active-high;
>>> +			status = "okay";
>>> +		};
>>> +
>>> +		reg_usb_h1_vbus: regulator@1 {
>>> +			compatible = "regulator-fixed";
>>> +			reg = <1>;
>>> +			pinctrl-names = "default";
>>> +			pinctrl-0 = <&pinctrl_usbh1_vbus>;
>>> +			regulator-name = "usb_h1_vbus";
>>> +			regulator-min-microvolt = <5000000>;
>>> +			regulator-max-microvolt = <5000000>;
>>> +			gpio = <&gpio1 29 GPIO_ACTIVE_HIGH>;
>>> +			enable-active-high;
>>> +			status = "disabled";
>>> +		};
>>> +
>>> +		reg_pcie: regulator@2 {
>>> +			compatible = "regulator-fixed";
>>> +			reg = <2>;
>>> +			pinctrl-names = "default";
>>> +			pinctrl-0 = <&pinctrl_pcie_reg>;
>>> +			regulator-name = "MPCIE_3V3";
>>> +			regulator-min-microvolt = <3300000>;
>>> +			regulator-max-microvolt = <3300000>;
>>> +			gpio = <&gpio3 19 GPIO_ACTIVE_HIGH>;
>>> +			enable-active-high;
>>> +			status = "disabled";
>>> +		};
>>> +	};
>>> +};
>>> +
>>> +&fec {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_enet>;
>>> +	phy-mode = "rgmii-id";
>>> +	phy-reset-gpios = <&gpio1 25 GPIO_ACTIVE_HIGH>;
>>> +	phy-reset-duration = <20>;
>>> +	phy-supply = <&sw2_reg>;
>>> +	phy-handle = <&ethphy0>;
>>> +	status = "okay";
>>> +
>>> +	mdio {
>>> +		#address-cells = <1>;
>>> +		#size-cells = <0>;
>>> +
>>> +		phy_port2: phy@1 {
>>> +			reg = <1>;
>>> +		};
>>> +
>>> +		phy_port3: phy@2 {
>>> +			reg = <2>;
>>> +		};
>>> +
>>> +		switch@0 {
>>> +			compatible = "qca,qca8334";
>>> +			reg = <0>;
>>> +
>>> +			switch_ports: ports {
>>> +				#address-cells = <1>;
>>> +				#size-cells = <0>;
>>> +
>>> +				ethphy0: port@0 {
>>> +					reg = <0>;
>>> +					label = "cpu";
>>> +					phy-mode = "rgmii";
>>> +					ethernet = <&fec>;
>>> +					fixed-link {
>>> +						speed = <1000>;
>>> +						full-duplex;
>>> +					};
>>> +				};
>>> +
>>> +				port@2 {
>>> +					reg = <2>;
>>> +					label = "eth2";
>>> +					phy-handle = <&phy_port2>;
>>> +				};
>>> +
>>> +				port@3 {
>>> +					reg = <3>;
>>> +					label = "eth1";
>>> +					phy-handle = <&phy_port3>;
>>> +				};
>>> +			};
>>> +		};
>>> +	};
>>> +};
>>> +
>>> +&i2c2 {
>>> +	clock-frequency = <100000>;
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_i2c2>;
>>> +	status = "okay";
>>> +
>>> +	eeprom@57 {
>>> +		compatible = "atmel,24c128";
>>> +		reg = <0x57>;
>>> +		pagesize = <64>;
>>> +		status = "okay";
>>> +	};
>>> +
>>> +	leds: leds@30 {
>>
>> led-controller@...
> 
> OK.
> 
>>> +		compatible = "ti,lp5562";
>>> +		label = "lp5562_leds";
>>> +		reg = <0x30>;
>>> +		clock-mode = /bits/ 8 <1>;
>>> +		status = "disabled";
>>
>> Kind of strange to have these disables. I think disabled should mean
>> present in the h/w, but not used/enabled. Either this should be present
>> on all boards and enabled or be moved to the per board dts.
> 
> Parts that are populated on all boards are enabled here. Parts that are
> populated only on some subset are disabled here and enabled in their
> appropriate dts files. I took this approach to avoid duplication and to
> make the maintenance easier.
> 
> My rough guess is that at least 50% of the device nodes would be removed
> from this common file and put into each of the board files.
> 
> Sure I can do it but it seems very prone to mistakes to me.

Hi Rob, gentle ping on this.

I would like to be sure how to proceed with this. Do you really want me
to move *all* nodes that are disabled in this common dtsi into the per
board dts?

All the boards use identical PCB. Anything that is disabled here is not
present on at least one of the boards. It means it is routed on the
board and the SoC has the capability but the parts are not populated.

So it is not only about the LED controller. What about the LCD, OLED,
backlight, USB..?

Thank you,
Michal

>>> +
>>> +		chan0 {
>>> +			chan-name = "R";
>>> +			led-cur = /bits/ 8 <0x20>;
>>> +			max-cur = /bits/ 8 <0x60>;
>>> +		};
>>> +
>>> +		chan1 {
>>> +			chan-name = "G";
>>> +			led-cur = /bits/ 8 <0x20>;
>>> +			max-cur = /bits/ 8 <0x60>;
>>> +		};
>>> +
>>> +		chan2 {
>>> +			chan-name = "B";
>>> +			led-cur = /bits/ 8 <0x20>;
>>> +			max-cur = /bits/ 8 <0x60>;
>>> +		};
>>> +
>>> +		chan3 {
>>> +			chan-name = "W";
>>> +			led-cur = /bits/ 8 <0x0>;
>>> +			max-cur = /bits/ 8 <0x0>;
>>> +		};
>>> +	};
>>> +
>>> +	pfuze200@8 {
>>
>> pmic@8
> 
> OK.
> 
>>> +		compatible = "fsl,pfuze200";
>>> +		pinctrl-names = "default";
>>> +		pinctrl-0 = <&pinctrl_pmic>;
>>> +		reg = <0x8>;
>>> +
>>> +		regulators {
>>> +			sw1a_reg: sw1ab {
>>> +				regulator-min-microvolt = <300000>;
>>> +				regulator-max-microvolt = <1875000>;
>>> +				regulator-boot-on;
>>> +				regulator-always-on;
>>> +				regulator-ramp-delay = <6250>;
>>> +			};
>>> +
>>> +			sw2_reg: sw2 {
>>> +				regulator-min-microvolt = <800000>;
>>> +				regulator-max-microvolt = <3300000>;
>>> +				regulator-boot-on;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			sw3a_reg: sw3a {
>>> +				regulator-min-microvolt = <400000>;
>>> +				regulator-max-microvolt = <1975000>;
>>> +				regulator-boot-on;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			sw3b_reg: sw3b {
>>> +				regulator-min-microvolt = <400000>;
>>> +				regulator-max-microvolt = <1975000>;
>>> +				regulator-boot-on;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			swbst_reg: swbst {
>>> +				regulator-min-microvolt = <5000000>;
>>> +				regulator-max-microvolt = <5150000>;
>>> +			};
>>> +
>>> +			snvs_reg: vsnvs {
>>> +				regulator-min-microvolt = <1000000>;
>>> +				regulator-max-microvolt = <3000000>;
>>> +				regulator-boot-on;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			vref_reg: vrefddr {
>>> +				regulator-boot-on;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			vgen1_reg: vgen1 {
>>> +				regulator-min-microvolt = <800000>;
>>> +				regulator-max-microvolt = <1550000>;
>>> +			};
>>> +
>>> +			vgen2_reg: vgen2 {
>>> +				regulator-min-microvolt = <800000>;
>>> +				regulator-max-microvolt = <1550000>;
>>> +			};
>>> +
>>> +			vgen3_reg: vgen3 {
>>> +				regulator-min-microvolt = <1800000>;
>>> +				regulator-max-microvolt = <3300000>;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			vgen4_reg: vgen4 {
>>> +				regulator-min-microvolt = <1800000>;
>>> +				regulator-max-microvolt = <3300000>;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			vgen5_reg: vgen5 {
>>> +				regulator-min-microvolt = <1800000>;
>>> +				regulator-max-microvolt = <3300000>;
>>> +				regulator-always-on;
>>> +			};
>>> +
>>> +			vgen6_reg: vgen6 {
>>> +				regulator-min-microvolt = <1800000>;
>>> +				regulator-max-microvolt = <3300000>;
>>> +				regulator-always-on;
>>> +			};
>>> +		};
>>> +	};
>>> +};
>>> +
>>> +&iomuxc {
>>> +	pinctrl_enet: enetgrp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_ENET_MDIO__ENET_MDIO		0x1B020
>>> +			MX6QDL_PAD_ENET_MDC__ENET_MDC		0x1B020
>>> +			MX6QDL_PAD_RGMII_TXC__RGMII_TXC		0x1B020
>>> +			MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x1B020
>>> +			MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x1B020
>>> +			MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x1B020
>>> +			MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x1B020
>>> +			MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x1B020
>>> +			MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1B020
>>> +			MX6QDL_PAD_RGMII_RD0__RGMII_RD0		0x1B020
>>> +			MX6QDL_PAD_RGMII_RD1__RGMII_RD1		0x1B020
>>> +			MX6QDL_PAD_RGMII_RD2__RGMII_RD2		0x1B020
>>> +			MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1B020
>>> +			MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x1B020
>>> +			MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x1B010
>>> +			MX6QDL_PAD_GPIO_16__ENET_REF_CLK	0x1B010
>>> +			MX6QDL_PAD_ENET_CRS_DV__GPIO1_IO25	0x1B098
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_i2c2: i2c2grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_KEY_COL3__I2C2_SCL	0x4001b899
>>> +			MX6QDL_PAD_KEY_ROW3__I2C2_SDA	0x4001b899
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_ipu1: ipu1grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK	0x10
>>> +			MX6QDL_PAD_DI0_PIN2__IPU1_DI0_PIN02		0x10
>>> +			MX6QDL_PAD_DI0_PIN3__IPU1_DI0_PIN03		0x10
>>> +			MX6QDL_PAD_DISP0_DAT0__IPU1_DISP0_DATA00	0x10
>>> +			MX6QDL_PAD_DISP0_DAT1__IPU1_DISP0_DATA01	0x10
>>> +			MX6QDL_PAD_DISP0_DAT2__IPU1_DISP0_DATA02	0x10
>>> +			MX6QDL_PAD_DISP0_DAT3__IPU1_DISP0_DATA03	0x10
>>> +			MX6QDL_PAD_DISP0_DAT4__IPU1_DISP0_DATA04	0x10
>>> +			MX6QDL_PAD_DISP0_DAT5__IPU1_DISP0_DATA05	0x10
>>> +			MX6QDL_PAD_DISP0_DAT6__IPU1_DISP0_DATA06	0x10
>>> +			MX6QDL_PAD_DISP0_DAT7__IPU1_DISP0_DATA07	0x10
>>> +			MX6QDL_PAD_DISP0_DAT8__IPU1_DISP0_DATA08	0x10
>>> +			MX6QDL_PAD_DISP0_DAT9__IPU1_DISP0_DATA09	0x10
>>> +			MX6QDL_PAD_DISP0_DAT10__IPU1_DISP0_DATA10	0x10
>>> +			MX6QDL_PAD_DISP0_DAT11__IPU1_DISP0_DATA11	0x10
>>> +			MX6QDL_PAD_DISP0_DAT12__IPU1_DISP0_DATA12	0x10
>>> +			MX6QDL_PAD_DISP0_DAT13__IPU1_DISP0_DATA13	0x10
>>> +			MX6QDL_PAD_DISP0_DAT14__IPU1_DISP0_DATA14	0x10
>>> +			MX6QDL_PAD_DISP0_DAT15__IPU1_DISP0_DATA15	0x10
>>> +			MX6QDL_PAD_DISP0_DAT16__IPU1_DISP0_DATA16	0x10
>>> +			MX6QDL_PAD_DISP0_DAT17__IPU1_DISP0_DATA17	0x10
>>> +			MX6QDL_PAD_DISP0_DAT18__IPU1_DISP0_DATA18	0x10
>>> +			MX6QDL_PAD_DISP0_DAT19__IPU1_DISP0_DATA19	0x10
>>> +			MX6QDL_PAD_DISP0_DAT20__IPU1_DISP0_DATA20	0x10
>>> +			MX6QDL_PAD_DISP0_DAT21__IPU1_DISP0_DATA21	0x10
>>> +			MX6QDL_PAD_DISP0_DAT22__IPU1_DISP0_DATA22	0x10
>>> +			MX6QDL_PAD_DISP0_DAT23__IPU1_DISP0_DATA23	0x10
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_pcie: pciegrp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_GPIO_17__GPIO7_IO12		0x1b098
>>> +			MX6QDL_PAD_KEY_COL4__GPIO4_IO14		0x1b098
>>> +			MX6QDL_PAD_CSI0_DATA_EN__GPIO5_IO20	0x1b098
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_pcie_reg: pciereggrp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_EIM_D19__GPIO3_IO19		0x1b098
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_pmic: pmicgrp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_GPIO_18__GPIO7_IO13		0x1b098
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_backlight_pwm: pwm1grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_GPIO_9__PWM1_OUT	0x8
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_uart1: uart1grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA	0x1b0a8
>>> +			MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA	0x1b0a8
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_usbh1: usbh1grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_EIM_D30__USB_H1_OC		0x1b098
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_usbh1_vbus: usbh1-vbus {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_ENET_TXD1__GPIO1_IO29	0x98
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_usbotg: usbotggrp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID	0x1b098
>>> +			MX6QDL_PAD_EIM_D21__USB_OTG_OC		0x1b098
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_usbotg_vbus: usbotg-vbus {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_EIM_D22__GPIO3_IO22	0x98
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_usdhc3: usdhc3grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_EIM_A16__GPIO2_IO22	0x1b018
>>> +			MX6QDL_PAD_SD3_RST__GPIO7_IO08	0x1b018
>>> +			MX6QDL_PAD_SD3_CMD__SD3_CMD	0x17059
>>> +			MX6QDL_PAD_SD3_CLK__SD3_CLK	0x10059
>>> +			MX6QDL_PAD_SD3_DAT0__SD3_DATA0	0x17059
>>> +			MX6QDL_PAD_SD3_DAT1__SD3_DATA1	0x17059
>>> +			MX6QDL_PAD_SD3_DAT2__SD3_DATA2	0x17059
>>> +			MX6QDL_PAD_SD3_DAT3__SD3_DATA3	0x17059
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_usdhc4: usdhc4grp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_SD4_CMD__SD4_CMD	0x1f069
>>> +			MX6QDL_PAD_SD4_CLK__SD4_CLK	0x10069
>>> +			MX6QDL_PAD_SD4_DAT0__SD4_DATA0	0x17069
>>> +			MX6QDL_PAD_SD4_DAT1__SD4_DATA1	0x17069
>>> +			MX6QDL_PAD_SD4_DAT2__SD4_DATA2	0x17069
>>> +			MX6QDL_PAD_SD4_DAT3__SD4_DATA3	0x17069
>>> +			MX6QDL_PAD_SD4_DAT4__SD4_DATA4	0x17069
>>> +			MX6QDL_PAD_SD4_DAT5__SD4_DATA5	0x17069
>>> +			MX6QDL_PAD_SD4_DAT6__SD4_DATA6	0x17069
>>> +			MX6QDL_PAD_SD4_DAT7__SD4_DATA7	0x17069
>>> +		>;
>>> +	};
>>> +
>>> +	pinctrl_wdog: wdoggrp {
>>> +		fsl,pins = <
>>> +			MX6QDL_PAD_GPIO_1__WDOG2_B	0x1b0b0
>>> +		>;
>>> +	};
>>> +};
>>> +
>>> +&ipu1_di0_disp0 {
>>> +	remote-endpoint = <&lcd_display_in>;
>>> +};
>>> +
>>> +&pcie {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_pcie>;
>>> +	reset-gpio = <&gpio7 12 GPIO_ACTIVE_LOW>;
>>> +	vpcie-supply = <&reg_pcie>;
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&pwm1 {
>>> +	#pwm-cells = <3>;
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_backlight_pwm>;
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&uart1 {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_uart1>;
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usbh1 {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_usbh1>;
>>> +	vbus-supply = <&reg_usb_h1_vbus>;
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&usbotg {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_usbotg>;
>>> +	vbus-supply = <&reg_usb_otg_vbus>;
>>> +	srp-disable;
>>> +	hnp-disable;
>>> +	adp-disable;
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usbphy1 {
>>> +	fsl,tx-d-cal = <106>;
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usbphy2 {
>>> +	fsl,tx-d-cal = <109>;
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&usdhc3 {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_usdhc3>;
>>> +	bus-width = <4>;
>>> +	cd-gpios = <&gpio7 8 GPIO_ACTIVE_LOW>;
>>> +	wp-gpios = <&gpio2 22 GPIO_ACTIVE_HIGH>;
>>> +	no-1-8-v;
>>> +	keep-power-in-suspend;
>>> +	enable-sdio-wakeup;
>>> +	vmmc-supply = <&sw2_reg>;
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&usdhc4 {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_usdhc4>;
>>> +	bus-width = <8>;
>>> +	non-removable;
>>> +	no-1-8-v;
>>> +	keep-power-in-suspend;
>>> +	vmmc-supply = <&sw2_reg>;
>>> +	status = "okay";
>>> +};
>>> +
>>> +&wdog1 {
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&wdog2 {
>>> +	pinctrl-names = "default";
>>> +	pinctrl-0 = <&pinctrl_wdog>;
>>> +	fsl,ext-reset-output;
>>> +	status = "okay";
>>> +};
>>> diff --git a/arch/arm/boot/dts/imx6dl-yapp4-draco.dts b/arch/arm/boot/dts/imx6dl-yapp4-draco.dts
>>> new file mode 100644
>>> index 0000000..fb62f31
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/imx6dl-yapp4-draco.dts
>>> @@ -0,0 +1,57 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +//
>>> +// Copyright (C) 2015-2018 Y Soft Corporation, a.s.
>>> +
>>> +/dts-v1/;
>>> +
>>> +#include "imx6dl.dtsi"
>>> +#include "imx6dl-yapp4-common.dtsi"
>>> +
>>> +/ {
>>> +	model = "Y Soft IOTA Draco i.MX6Solo board";
>>> +	compatible = "ysoft,imx6dl-yapp4-draco", "fsl,imx6dl";
>>
>> Is this documented?
> 
> Just the vendor prefix, not the board names. If I am supposed to add
> those as well I would appreciate a hint what is the correct place to
> add it. My impression is that only evaluation boards from SoC vendors
> are documented

Ping. There is a lot of boards from various vendors that are not
documented. That does not mean it is correct of course. So I think
"Documentation/devicetree/bindings/arm/ysoft.txt" is the way to go?

Also the format of those files does not seem really standardized. Can
you pick one of them as a good example, please?

Thank you,
Michal
  
>>> +
>>> +	cpus {
>>> +		/delete-node/ cpu@1;
>>> +	};
>>> +
>>> +	memory@10000000 {
>>> +		reg = <0x10000000 0x20000000>;
>>> +	};
>>> +};
>>> +
>>> +&backlight {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&lcd_display {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&leds {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&panel {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&pwm1 {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&reg_usb_h1_vbus {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usbh1 {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usbphy2 {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usdhc3 {
>>> +	status = "okay";
>>> +};
>>> diff --git a/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts b/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts
>>> new file mode 100644
>>> index 0000000..799fb4c
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts
>>> @@ -0,0 +1,33 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +//
>>> +// Copyright (C) 2015-2018 Y Soft Corporation, a.s.
>>> +
>>> +/dts-v1/;
>>> +
>>> +#include "imx6dl.dtsi"
>>> +#include "imx6dl-yapp4-common.dtsi"
>>> +
>>> +/ {
>>> +	model = "Y Soft IOTA Hydra i.MX6DualLite board";
>>> +	compatible = "ysoft,imx6dl-yapp4-hydra", "fsl,imx6dl";
>>> +
>>> +	memory@10000000 {
>>> +		reg = <0x10000000 0x80000000>;
>>> +	};
>>> +};
>>> +
>>> +&leds {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&pcie {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&reg_pcie {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usdhc3 {
>>> +	status = "okay";
>>> +};
>>> diff --git a/arch/arm/boot/dts/imx6dl-yapp4-ursa.dts b/arch/arm/boot/dts/imx6dl-yapp4-ursa.dts
>>> new file mode 100644
>>> index 0000000..23af972
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/imx6dl-yapp4-ursa.dts
>>> @@ -0,0 +1,53 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +//
>>> +// Copyright (C) 2015-2018 Y Soft Corporation, a.s.
>>> +
>>> +/dts-v1/;
>>> +
>>> +#include "imx6dl.dtsi"
>>> +#include "imx6dl-yapp4-common.dtsi"
>>> +
>>> +/ {
>>> +	model = "Y Soft IOTA Ursa i.MX6Solo board";
>>> +	compatible = "ysoft,imx6dl-yapp4-ursa", "fsl,imx6dl";
>>> +
>>> +	cpus {
>>> +		/delete-node/ cpu@1;
>>> +	};
>>> +
>>> +	memory@10000000 {
>>> +		reg = <0x10000000 0x20000000>;
>>> +	};
>>> +};
>>> +
>>> +&backlight {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&lcd_display {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&panel {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&pwm1 {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&reg_usb_h1_vbus {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&switch_ports {
>>> +	/delete-node/ port@2;
>>> +};
>>> +
>>> +&usbh1 {
>>> +	status = "okay";
>>> +};
>>> +
>>> +&usbphy2 {
>>> +	status = "okay";
>>> +};
>>> -- 
>>> 2.1.4
>>>