linux-kernel - Re: [PATCH v3 1/3] ARM: dts: imx6: Add Savageboard common file

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Date:   Mon, 2 Jan 2017 14:52:40 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Milo Kim <woogyom.kim@...il.com>
Cc:     Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] ARM: dts: imx6: Add Savageboard common file

On Fri, Dec 09, 2016 at 10:04:34AM +0900, Milo Kim wrote:
> * Memory
>   memblock for DDR3 1GB
> 
> * Regulator
>   3.3V for panel and backlight.
> 
> * Display
>   Enable HDMI and LVDS panel. Savageboard supports AVIC TM097TDH02 panel
>   which is compatible with Hannstar HSD100PXN1, so reuse it.
> 
> * Clock
>   The commit d28be499c45e6 is applied to support LVDS and HDMI output
>   simultaneously.
> 
> * Pinmux
>   eMMC, ethernet, HDMI, I2C, power button, PWM, SD card and UART.
> 
> * Others
>   Enable ethernet, UART1 debug, USB host, USDHC3 for microSD card and
>   USDHC4 for built-in eMMC storage.
> 
> Signed-off-by: Milo Kim <woogyom.kim@...il.com>
> ---
>  arch/arm/boot/dts/imx6qdl-savageboard.dtsi | 262 +++++++++++++++++++++++++++++
>  1 file changed, 262 insertions(+)
>  create mode 100644 arch/arm/boot/dts/imx6qdl-savageboard.dtsi
> 
> diff --git a/arch/arm/boot/dts/imx6qdl-savageboard.dtsi b/arch/arm/boot/dts/imx6qdl-savageboard.dtsi
> new file mode 100644
> index 0000000..a7a7e1d
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx6qdl-savageboard.dtsi
> @@ -0,0 +1,262 @@
> +/*
> + * Copyright (C) 2016 Milo Kim <woogyom.kim@...il.com>
> + *
> + * This file is dual-licensed: you can use it either under the terms
> + * of the GPL or the X11 license, at your option. Note that this dual
> + * licensing only applies to this file, and not this project as a
> + * whole.
> + *
> + *  a) This file is free software; you can redistribute it and/or
> + *     modify it under the terms of the GNU General Public License
> + *     version 2 as published by the Free Software Foundation.
> + *
> + *     This file is distributed in the hope that it will be useful
> + *     but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *     GNU General Public License for more details.
> + *
> + * Or, alternatively
> + *
> + *  b) Permission is hereby granted, free of charge, to any person
> + *     obtaining a copy of this software and associated documentation
> + *     files (the "Software"), to deal in the Software without
> + *     restriction, including without limitation the rights to use
> + *     copy, modify, merge, publish, distribute, sublicense, and/or
> + *     sell copies of the Software, and to permit persons to whom the
> + *     Software is furnished to do so, subject to the following
> + *     conditions:
> + *
> + *     The above copyright notice and this permission notice shall be
> + *     included in all copies or substantial portions of the Software.
> + *
> + *     THE SOFTWARE IS PROVIDED , WITHOUT WARRANTY OF ANY KIND
> + *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
> + *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
> + *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY
> + *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + *     OTHER DEALINGS IN THE SOFTWARE.
> + */

The copyright text needs to be corrected as below.

https://patchwork.kernel.org/patch/9475057/

> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +
> +/ {
> +	chosen {
> +		stdout-path = &uart1;
> +	};
> +
> +	memory@...00000 {
> +		device_type = "memory";
> +		reg = <0x10000000 0x40000000>;
> +	};
> +
> +	backlight: panel_bl {

The node name should be as generic as possible, while label name can be
specific.  That said, the following one should be better.

	panel_bl: backlight

> +		compatible = "pwm-backlight";
> +		brightness-levels = <0 4 8 16 32 64 128 255>;
> +		default-brightness-level = <4>;
> +		power-supply = <&reg_3p3v>;
> +		pwms = <&pwm1 0 10000>;
> +	};
> +
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_gpio_keys>;
> +
> +		power {
> +			gpios = <&gpio3 7 GPIO_ACTIVE_LOW>;
> +			label = "Power Button";
> +			linux,code = <KEY_POWER>;
> +			wakeup-source;
> +		};
> +	};
> +
> +	panel {
> +		compatible = "avic, tm097tdh02", "hannstar,hsd100pxn1";

"avic, tm097tdh02" is an undocumented compatible.

> +		backlight = <&backlight>;
> +		power-supply = <&reg_3p3v>;
> +
> +		port {
> +			panel_in: endpoint {
> +				remote-endpoint = <&lvds0_out>;
> +			};
> +		};
> +	};
> +
> +	reg_3p3v: regulator-3p3v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "3P3V";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +	};
> +};
> +
> +&clks {
> +	assigned-clocks = <&clks IMX6QDL_CLK_LDB_DI0_SEL>,
> +			  <&clks IMX6QDL_CLK_LDB_DI1_SEL>;
> +	assigned-clock-parents = <&clks IMX6QDL_CLK_PLL3_USB_OTG>,
> +				 <&clks IMX6QDL_CLK_PLL3_USB_OTG>;
> +};
> +
> +&fec {
> +	phy-mode = "rgmii";
> +	phy-reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_enet>;
> +	status = "okay";
> +};
> +
> +&hdmi {
> +	ddc-i2c-bus = <&i2c2>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_hdmi_tx_cec>;
> +	status = "okay";
> +};
> +
> +&i2c2 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	status = "okay";
> +};
> +
> +&ldb {
> +	status = "okay";
> +
> +	lvds-channel@0 {
> +		reg = <0>;
> +		status = "okay";
> +
> +		port@4 {
> +			reg = <4>;
> +
> +			lvds0_out: endpoint {
> +				remote-endpoint = <&panel_in>;
> +			};
> +		};
> +	};
> +};
> +
> +&pwm1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm1>;
> +	status = "okay";
> +};
> +
> +&uart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart1>;
> +	status = "okay";
> +};
> +
> +&usbh1 {
> +	status = "okay";
> +};
> +
> +/* SD card */
> +&usdhc3 {
> +	bus-width = <4>;
> +	cd-gpios = <&gpio2 0 GPIO_ACTIVE_LOW>;
> +	no-1-8-v;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_sd>;
> +	status = "okay";
> +};
> +
> +/* eMMC */
> +&usdhc4 {
> +	bus-width = <8>;
> +	keep-power-in-suspend;
> +	no-1-8-v;
> +	non-removable;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_emmc>;
> +	status = "okay";
> +};
> +
> +&iomuxc {
> +	pinctrl_emmc: emmcgrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD4_CMD__SD4_CMD		0x17059
> +			MX6QDL_PAD_SD4_CLK__SD4_CLK		0x10059
> +			MX6QDL_PAD_SD4_DAT0__SD4_DATA0		0x17059
> +			MX6QDL_PAD_SD4_DAT1__SD4_DATA1		0x17059
> +			MX6QDL_PAD_SD4_DAT2__SD4_DATA2		0x17059
> +			MX6QDL_PAD_SD4_DAT3__SD4_DATA3		0x17059
> +			MX6QDL_PAD_SD4_DAT4__SD4_DATA4		0x17059
> +			MX6QDL_PAD_SD4_DAT5__SD4_DATA5		0x17059
> +			MX6QDL_PAD_SD4_DAT6__SD4_DATA6		0x17059
> +			MX6QDL_PAD_SD4_DAT7__SD4_DATA7		0x17059
> +		>;
> +	};
> +
> +	pinctrl_enet: enetgrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_ENET_MDIO__ENET_MDIO		0x1b0b0
> +			MX6QDL_PAD_ENET_MDC__ENET_MDC		0x1b0b0
> +			MX6QDL_PAD_RGMII_TXC__RGMII_TXC		0x1b030
> +			MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x1b030
> +			MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x1b030
> +			MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x1b030
> +			MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x1b030
> +			MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x1b030
> +			MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x1b0b0
> +			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
> +			/* PHY reset */
> +			MX6QDL_PAD_ENET_CRS_DV__GPIO1_IO25	0x1b0b0
> +		>;
> +	};
> +
> +	pinctrl_hdmi_tx_cec: hdmitxcecgrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_KEY_ROW2__HDMI_TX_CEC_LINE	0x1f8b0
> +		>;
> +	};
> +
> +	pinctrl_i2c2: i2c2grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_KEY_COL3__I2C2_SCL		0x4001b8b1
> +			MX6QDL_PAD_KEY_ROW3__I2C2_SDA		0x4001b8b1
> +		>;
> +	};
> +
> +	pinctrl_gpio_keys: gpiokeysgrp {
> +		fsl,pins = <
> +			MX6QDL_PAD_EIM_DA7__GPIO3_IO07		0x1b0b1
> +		>;
> +	};

The pinctrl entries are well sorted alphabetically except this one.

Shawn

> +
> +	pinctrl_pwm1: pwm1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_SD1_DAT3__PWM1_OUT		0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_sd: sdgrp {
> +		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
> +			/* CD pin */
> +			MX6QDL_PAD_NANDF_D0__GPIO2_IO00		0x1b0b1
> +		>;
> +	};
> +
> +	pinctrl_uart1: uart1grp {
> +		fsl,pins = <
> +			MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA	0x1b0b1
> +			MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA	0x1b0b1
> +		>;
> +	};
> +};
> -- 
> 2.9.3
>