Date:   Thu, 30 Nov 2017 08:39:13 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     kernel@...gutronix.de, fabio.estevam@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/6] ARM: dts: imx6qdl: Add Variscite DART-MX6 SoM
 support

On Wed, Nov 29, 2017 at 11:20:55AM +0100, Neil Armstrong wrote:
> This patch adds support for the Variscite DART-MX6 SoM with :
> - i.MX6 Quad or Dual Lite SoC
> - 1Gb/2Gb LPDDR2
> - 4-64 GB eMMC
> - Camera Interface
> - HDMI+CEC interface
> - LVDS / DSI / Parallel RGB interfaces
> - Ethernet RGMII interface
> - On-SoM Wi-Fi/Bluetooth with WiLink wl1835 SDIO Module
> - SD/MMC/SDIO interface
> - USB Host + USB OTG interface
> - I2C interfaces
> - SPI interfaces
> - PCI-Express 2.0 interface
> - on-SoM Audio Codec with HP/Line-In interfaces + DMIC interface
> - Digital Audio interface
> - S/PDIF interface
> 
> Product website : http://www.variscite.com/products/system-on-module-som/cortex-a9/dart-mx6-cpu-freescale-imx6
> 
> Support is handled with a SoM-centric dtsi exporting the default interfaces
> along the default pinmuxing to be enabled by the board dts file.
> 
> Only board-independent devices like WiFi, eMMC or PMIC are enabled in the dtsi.
> 
> Reviewed-by: Fabio Estevam <fabio.estevam@....com>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>

Looks pretty good.  Only a couple of minor comments.

> ---
>  arch/arm/boot/dts/imx6qdl-var-dart.dtsi | 504 ++++++++++++++++++++++++++++++++
>  1 file changed, 504 insertions(+)
>  create mode 100644 arch/arm/boot/dts/imx6qdl-var-dart.dtsi
> 
> diff --git a/arch/arm/boot/dts/imx6qdl-var-dart.dtsi b/arch/arm/boot/dts/imx6qdl-var-dart.dtsi
> new file mode 100644
> index 0000000..fd2520b
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx6qdl-var-dart.dtsi
> @@ -0,0 +1,504 @@
> +/*
> + * Support for Variscite DART-MX6 Module
> + *
> + * Copyright 2017 BayLibre, SAS
> + * Author: Neil Armstrong <narmstrong@...libre.com>
> + *
> + * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> + */
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/sound/fsl-imx-audmux.h>
> +
> +/ {
> +	memory {
> +		reg = <0x10000000 0x40000000>;
> +	};
> +
> +	reg_3p3v: regulator-3p3v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "3P3V";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +	};
> +
> +	reg_wl18xx_vmmc: regulator-wl18xx {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vwl1807";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		gpio = <&gpio7 8 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +		startup-delay-us = <70000>;
> +	};
> +};
> +
> +&audmux {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_audmux>;
> +	status = "okay";
> +
> +	ssi2 {
> +		fsl,audmux-port = <1>;
> +		fsl,port-config = <
> +			(IMX_AUDMUX_V2_PTCR_SYN |
> +			IMX_AUDMUX_V2_PTCR_TFSDIR |
> +			IMX_AUDMUX_V2_PTCR_TFSEL(2) |
> +			IMX_AUDMUX_V2_PTCR_TCLKDIR |
> +			IMX_AUDMUX_V2_PTCR_TCSEL(2))
> +			IMX_AUDMUX_V2_PDCR_RXDSEL(2)
> +		>;
> +	};
> +
> +	aud3 {
> +		fsl,audmux-port = <2>;
> +		fsl,port-config = <
> +			IMX_AUDMUX_V2_PTCR_SYN
> +			IMX_AUDMUX_V2_PDCR_RXDSEL(1)
> +		>;
> +	};
> +};
> +
> +&can1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_flexcan1>;
> +	status = "disabled";
> +};
> +
> +&can2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_flexcan2>;
> +	status = "disabled";
> +};
> +
> +&ecspi1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_ecspi1>;
> +	status = "disabled";
> +};
> +
> +&fec {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_enet>;
> +	phy-mode = "rgmii";
> +	status = "disabled";
> +};
> +
> +&hdmi {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_hdmicec>;
> +	ddc-i2c-bus = <&i2c1>;
> +	status = "disabled";
> +};
> +
> +&i2c1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c1>;
> +	status = "disabled";
> +};
> +
> +&i2c2 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	status = "okay";
> +
> +	pmic@08 {

Please drop the leading zero in unit-address.

> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_pmic>;
> +		compatible = "fsl,pfuze100";
> +		reg = <0x08>;
> +
> +		regulators {
> +			sw1a_reg: sw1ab {
> +				regulator-min-microvolt = <300000>;
> +				regulator-max-microvolt = <1875000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +				regulator-ramp-delay = <6250>;
> +			};
> +
> +			sw1c_reg: sw1c {
> +				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 = <800000>;
> +				regulator-max-microvolt = <3950000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			sw3b_reg: sw3b {
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3950000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			sw4_reg: sw4 {
> +				regulator-min-microvolt = <800000>;
> +				regulator-max-microvolt = <3950000>;
> +			};
> +
> +			snvs_reg: vsnvs {
> +				regulator-min-microvolt = <1200000>;
> +				regulator-max-microvolt = <3000000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			vref_reg: vrefddr {
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			vgen6_reg: vgen6 {
> +				regulator-min-microvolt = <2800000>;
> +				regulator-max-microvolt = <2800000>;
> +				regulator-always-on;
> +				regulator-boot-on;
> +			};
> +		};
> +	};
> +
> +	codec: codec@1b {

Label should be something specific, maybe tlv320aic3106?

> +		compatible = "ti,tlv320aic3106";
> +		reg = <0x1b>;
> +		#sound-dai-cells = <0>;
> +		DRVDD-supply = <&reg_3p3v>;
> +		AVDD-supply = <&reg_3p3v>;
> +		IOVDD-supply = <&reg_3p3v>;
> +		DVDD-supply = <&reg_3p3v>;
> +		ai3x-ocmv = <0>;
> +		gpio-reset = <&gpio5 5 GPIO_ACTIVE_LOW>;
> +	};
> +};
> +
> +&i2c3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c3>;
> +	status = "disabled";
> +};
> +
> +&iomuxc {
> +	pinctrl_audmux: audmux {
> +		fsl,pins = <
> +			MX6QDL_PAD_CSI0_DAT7__AUD3_RXD		0x130b0
> +			MX6QDL_PAD_CSI0_DAT4__AUD3_TXC		0x130b0
> +			MX6QDL_PAD_CSI0_DAT5__AUD3_TXD		0x110b0
> +			MX6QDL_PAD_CSI0_DAT6__AUD3_TXFS		0x130b0
> +			/* Audio Clock */
> +			MX6QDL_PAD_GPIO_0__CCM_CLKO1		0x130b0
> +		>;
> +	};
> +
> +	pinctrl_bt: bt {
> +		fsl,pins = <
> +			/* Bluetooth enable */
> +			MX6QDL_PAD_SD3_DAT6__GPIO6_IO18		0x1b0b1
> +			/* Bluetooth Slow Clock */
> +			MX6QDL_PAD_ENET_RXD0__OSC32K_32K_OUT	0x000b0
> +		>;
> +	};
> +
> +	pinctrl_ecspi1: ecspi1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_KEY_COL1__ECSPI1_MISO	0x100b1
> +			MX6QDL_PAD_KEY_ROW0__ECSPI1_MOSI	0x100b1
> +			MX6QDL_PAD_KEY_COL0__ECSPI1_SCLK	0x100b1
> +			/* SPI1 CS0 */
> +			MX6QDL_PAD_KEY_ROW1__GPIO4_IO09		0x1b0b0
> +			/* SPI1 CS1 */
> +			MX6QDL_PAD_KEY_COL2__GPIO4_IO10		0x1b0b0
> +		>;
> +	};
> +
> +	pinctrl_enet: enetgrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_ENET_MDIO__ENET_MDIO		0x100b0
> +			MX6QDL_PAD_ENET_MDC__ENET_MDC		0x100b0
> +			MX6QDL_PAD_RGMII_TXC__RGMII_TXC		0x10030
> +			MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x10030
> +			MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x10030
> +			MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x10030
> +			MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x10030
> +			MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x10030
> +			MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x100b0
> +			MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1b030
> +			MX6QDL_PAD_RGMII_RD0__RGMII_RD0		0x1b030
> +			MX6QDL_PAD_RGMII_RD1__RGMII_RD1		0x1b030
> +			MX6QDL_PAD_RGMII_RD2__RGMII_RD2		0x1b030
> +			MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1b030
> +			MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x1b030
> +		>;
> +	};
> +
> +	pinctrl_flexcan1: flexcan1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_GPIO_7__FLEXCAN1_TX	0x1b0b0
> +			MX6QDL_PAD_GPIO_8__FLEXCAN1_RX	0x1b0b0
> +		>;
> +	};
> +
> +	pinctrl_flexcan2: flexcan2grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_KEY_COL4__FLEXCAN2_TX	0x1b0b0
> +			MX6QDL_PAD_KEY_ROW4__FLEXCAN2_RX	0x1b0b0
> +		>;
> +	};
> +
> +	pinctrl_hdmicec: hdmicecgrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_KEY_ROW2__HDMI_TX_CEC_LINE	0x1f8b0
> +		>;
> +	};
> +
> +	pinctrl_i2c1: i2c1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_CSI0_DAT8__I2C1_SDA	0x4001b8b1
> +			MX6QDL_PAD_CSI0_DAT9__I2C1_SCL	0x4001b8b1
> +		>;
> +	};
> +
> +	pinctrl_i2c2: i2c2grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_KEY_COL3__I2C2_SCL	0x4001b8b1
> +			MX6QDL_PAD_KEY_ROW3__I2C2_SDA	0x4001b8b1
> +		>;
> +	};
> +
> +	pinctrl_i2c3: i2c3grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_GPIO_5__I2C3_SCL	0x4001b8b1
> +			MX6QDL_PAD_GPIO_16__I2C3_SDA	0x4001b8b1
> +		>;
> +	};
> +
> +	pinctrl_pmic: pmicgrp {
> +		fsl,pins = <
> +			/* PMIC INT */
> +			MX6QDL_PAD_GPIO_17__GPIO7_IO12	0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_pwm2: pwm2grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_DISP0_DAT9__PWM2_OUT	0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_uart1: uart1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
> +			MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA 0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_uart2: uart2grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD3_DAT4__UART2_RX_DATA	0x1b0b1
> +			MX6QDL_PAD_SD3_DAT5__UART2_TX_DATA	0x1b0b1
> +			MX6QDL_PAD_SD4_DAT6__UART2_CTS_B	0x1b0b1
> +			MX6QDL_PAD_SD4_DAT5__UART2_RTS_B	0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_uart3: uart3grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_EIM_D25__UART3_RX_DATA 0x1b0b1
> +			MX6QDL_PAD_EIM_D24__UART3_TX_DATA 0x1b0b1
> +			MX6QDL_PAD_EIM_D23__UART3_CTS_B   0x1b0b1
> +			MX6QDL_PAD_EIM_EB3__UART3_RTS_B   0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_usbotg: usbotggrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID 0x17059
> +		>;
> +	};
> +
> +	pinctrl_usdhc1: usdhc1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD1_CMD__SD1_CMD	0x17059
> +			MX6QDL_PAD_SD1_CLK__SD1_CLK	0x10059
> +			MX6QDL_PAD_SD1_DAT0__SD1_DATA0	0x17059
> +			MX6QDL_PAD_SD1_DAT1__SD1_DATA1	0x17059
> +			MX6QDL_PAD_SD1_DAT2__SD1_DATA2	0x17059
> +			MX6QDL_PAD_SD1_DAT3__SD1_DATA3	0x17059
> +			/* WL_EN */
> +			MX6QDL_PAD_SD3_DAT7__GPIO6_IO17 0x17071
> +			/* WL_IRQ */
> +			MX6QDL_PAD_SD3_RST__GPIO7_IO08  0x17071
> +		>;
> +	};
> +
> +	pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD1_CMD__SD1_CMD	0x170B9
> +			MX6QDL_PAD_SD1_CLK__SD1_CLK	0x100B9
> +			MX6QDL_PAD_SD1_DAT0__SD1_DATA0	0x170B9
> +			MX6QDL_PAD_SD1_DAT1__SD1_DATA1	0x170B9
> +			MX6QDL_PAD_SD1_DAT2__SD1_DATA2	0x170B9
> +			MX6QDL_PAD_SD1_DAT3__SD1_DATA3	0x170B9
> +		>;
> +	};
> +
> +	pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD1_CMD__SD1_CMD	0x170F9
> +			MX6QDL_PAD_SD1_CLK__SD1_CLK	0x100F9
> +			MX6QDL_PAD_SD1_DAT0__SD1_DATA0	0x170F9
> +			MX6QDL_PAD_SD1_DAT1__SD1_DATA1	0x170F9
> +			MX6QDL_PAD_SD1_DAT2__SD1_DATA2	0x170F9
> +			MX6QDL_PAD_SD1_DAT3__SD1_DATA3	0x170F9
> +		>;
> +	};
> +
> +	pinctrl_usdhc2: usdhc2grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD2_CMD__SD2_CMD	0x17059
> +			MX6QDL_PAD_SD2_CLK__SD2_CLK	0x10059
> +			MX6QDL_PAD_SD2_DAT0__SD2_DATA0	0x17059
> +			MX6QDL_PAD_SD2_DAT1__SD2_DATA1	0x17059
> +			MX6QDL_PAD_SD2_DAT2__SD2_DATA2	0x17059
> +			MX6QDL_PAD_SD2_DAT3__SD2_DATA3	0x17059
> +		>;
> +	};
> +
> +	pinctrl_usdhc3: usdhc3grp {
> +		fsl,pins = <
> +			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
> +		>;
> +	};
> +};
> +
> +&pcie {
> +	fsl,tx-swing-full = <103>;
> +	fsl,tx-swing-low = <103>;
> +	reset-gpio = <&gpio4 11 GPIO_ACTIVE_LOW>;
> +	status = "disabled";
> +};
> +
> +&pwm2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm2>;
> +	status = "disabled";
> +};
> +
> +&reg_arm {
> +       vin-supply = <&sw1a_reg>;
> +};
> +
> +&reg_pu {
> +       vin-supply = <&sw1c_reg>;
> +};
> +
> +&reg_soc {
> +       vin-supply = <&sw1c_reg>;
> +};
> +
> +&uart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart1>;
> +	status = "disabled";
> +};
> +
> +&uart2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart2 &pinctrl_bt>;
> +	uart-has-rtscts;
> +	status = "okay";
> +
> +	bluetooth {
> +		compatible = "ti,wl1835-st";
> +		enable-gpios = <&gpio6 18 GPIO_ACTIVE_HIGH>;
> +	};
> +};
> +
> +&uart3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart3>;
> +	uart-has-rtscts;
> +	status = "disabled";
> +};
> +
> +&usbh1 {
> +	status = "disabled";
> +};
> +
> +&usbotg {
> +	vbus-supply = <&reg_usb_otg_vbus>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_usbotg>;
> +	disable-over-current;
> +	status = "disabled";
> +};
> +
> +&usdhc1 {
> +	pinctrl-names = "default", "state_100mhz", "state_200mhz";
> +	pinctrl-0 = <&pinctrl_usdhc1>;
> +	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
> +	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
> +	bus-width = <4>;
> +	vmmc-supply = <&reg_wl18xx_vmmc>;
> +	non-removable;
> +	wakeup-source;
> +	keep-power-in-suspend;
> +	cap-power-off-card;
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	status = "okay";
> +
> +	wlcore: wlcore@2 {
> +		compatible = "ti,wl1835";
> +		reg = <2>;
> +		interrupt-parent = <&gpio6>;
> +		interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> +		ref-clock-frequency = <38400000>;
> +	};
> +};
> +
> +&usdhc2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_usdhc2>;
> +	no-1-8-v;
> +	keep-power-in-suspend;
> +	wakeup-source;
> +	status = "disabled";
> +};
> +
> +&usdhc3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_usdhc3>;
> +	non-removable;
> +	keep-power-in-suspend;
> +	wakeup-source;
> +	status = "okay";
> +};
> +
> +&ssi2 {
> +	status = "okay";
> +};
> +
> +&snvs_poweroff {
> +	status = "okay";
> +};

The last two nodes break the alphabetical order.

Shawn
> -- 
> 2.7.4
> 

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