Re: [PATCH v2 2/2] ARM: dts: imx6q: Add mccmon6 board support

From: Shawn Guo
Date: Mon Jan 02 2017 - 21:07:23 EST

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In reply to: Lukasz Majewski: "[PATCH v2 2/2] ARM: dts: imx6q: Add mccmon6 board support"
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On Tue, Jan 03, 2017 at 12:43:38AM +0100, Lukasz Majewski wrote:
> From: Lukasz Majewski <l.majewski@xxxxxxxxx>
>
> This patch provides support for Liebherr's Monitor 6 board (abverrated as
> mccmon6) to Linux kernel.
>
> Signed-off-by: Lukasz Majewski <lukma@xxxxxxx>
> ---
> Changes for v2:
> - Reorganize the dts file according to Valdimir Zapolskiy's comments
>
> ---
> MCCMON6 board support depends on following patches:
>
> 1. "video: backlight: pwm_bl: Initialize fb_bl_on[x] and use_count during pwm_backlight_probe()"
> http://patchwork.ozlabs.org/patch/708844/
>
> 2. "pwm: imx: Provide atomic operation for IMX PWM driver"
> http://patchwork.ozlabs.org/patch/708847/ - http://patchwork.ozlabs.org/patch/708843/
> ---
> arch/arm/boot/dts/Makefile | 1 +
> arch/arm/boot/dts/imx6q-mccmon6.dts | 477 ++++++++++++++++++++++++++++++++++++
> 2 files changed, 478 insertions(+)
> create mode 100644 arch/arm/boot/dts/imx6q-mccmon6.dts
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index c558ba7..0aa8e89 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -383,6 +383,7 @@ dtb-$(CONFIG_SOC_IMX6Q) += \
> imx6q-hummingboard.dtb \
> imx6q-icore-rqs.dtb \
> imx6q-marsboard.dtb \
> + imx6q-mccmon6.dtb \
> imx6q-nitrogen6x.dtb \
> imx6q-nitrogen6_max.dtb \
> imx6q-novena.dtb \
> diff --git a/arch/arm/boot/dts/imx6q-mccmon6.dts b/arch/arm/boot/dts/imx6q-mccmon6.dts
> new file mode 100644
> index 0000000..7128dc2
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx6q-mccmon6.dts
> @@ -0,0 +1,477 @@
> +/*
> + * Copyright 2016-2017
> + * Lukasz Majewski, DENX Software Engineering, lukma@xxxxxxx
> + *
> + * This program 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.
> + *
> + */

You might want to GPL/X11 dual licence for non-Linux device tree users.
There are a plenty of examples in arch/arm/boot/dts. But note the
following correction.

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

> +
> +/dts-v1/;
> +
> +#include "imx6q.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/pwm/pwm.h>
> +
> +/ {
> + model = "Liebherr (LWN) monitor6 i.MX6 Quad Board";
> + compatible = "lwn,mccmon6", "fsl,imx6q";
> +
> + memory {
> + reg = <0x10000000 0x80000000>;
> + };
> +
> + backlight_lvds: backlight {
> + compatible = "pwm-backlight";
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_backlight>;
> + pwms = <&pwm2 0 5000000 PWM_POLARITY_INVERTED>;
> + brightness-levels = < 0 1 2 3 4 5 6 7 8 9
> + 10 11 12 13 14 15 16 17 18 19
> + 20 21 22 23 24 25 26 27 28 29
> + 30 31 32 33 34 35 36 37 38 39
> + 40 41 42 43 44 45 46 47 48 49
> + 50 51 52 53 54 55 56 57 58 59
> + 60 61 62 63 64 65 66 67 68 69
> + 70 71 72 73 74 75 76 77 78 79
> + 80 81 82 83 84 85 86 87 88 89
> + 90 91 92 93 94 95 96 97 98 99
> + 100 101 102 103 104 105 106 107 108 109
> + 110 111 112 113 114 115 116 117 118 119
> + 120 121 122 123 124 125 126 127 128 129
> + 130 131 132 133 134 135 136 137 138 139
> + 140 141 142 143 144 145 146 147 148 149
> + 150 151 152 153 154 155 156 157 158 159
> + 160 161 162 163 164 165 166 167 168 169
> + 170 171 172 173 174 175 176 177 178 179
> + 180 181 182 183 184 185 186 187 188 189
> + 190 191 192 193 194 195 196 197 198 199
> + 200 201 202 203 204 205 206 207 208 209
> + 210 211 212 213 214 215 216 217 218 219
> + 220 221 222 223 224 225 226 227 228 229
> + 230 231 232 233 234 235 236 237 238 239
> + 240 241 242 243 244 245 246 247 248 249
> + 250 251 252 253 254 255>;
> + default-brightness-level = <50>;
> + enable-gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;
> + };
> +
> + reg_lvds: regulator-lvds {
> + compatible = "regulator-fixed";
> + regulator-name = "lvds_ppen";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_reg_lvds>;
> + gpio = <&gpio1 19 GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + };
> +
> + panel-lvds0 {
> + compatible = "innolux,g121x1-l03";
> + backlight = <&backlight_lvds>;
> + power-supply = <&reg_lvds>;
> +
> + port {
> + panel_in_lvds0: endpoint {
> + remote-endpoint = <&lvds0_out>;
> + };
> + };
> + };
> +};
> +
> +&iomuxc {

Considering the data amount of this node, we generally put it at the
bottom of the file to improve the readability of the rest.

> + pinctrl-names = "default";
> +
> + imx6q-mccmon6 {

This container node can now be dropped completely to save one level of
indentation.

> + pinctrl_backlight: dispgrp {
> + fsl,pins = <
> + /* BLEN_OUT */
> + MX6QDL_PAD_GPIO_2__GPIO1_IO02 0x1b0b0
> + >;
> + };
> +
> + pinctrl_ecspi3: ecspi3grp {
> + fsl,pins = <
> + MX6QDL_PAD_DISP0_DAT2__ECSPI3_MISO 0x100b1
> + MX6QDL_PAD_DISP0_DAT1__ECSPI3_MOSI 0x100b1
> + MX6QDL_PAD_DISP0_DAT0__ECSPI3_SCLK 0x100b1
> + >;
> + };
> +
> + pinctrl_ecspi3_cs: ecspi3cs {

ecspi3csgrp, if we follow the naming scheme used in other nodes.

> + fsl,pins = <
> + MX6QDL_PAD_DISP0_DAT3__GPIO4_IO24 0x80000000
> + >;
> + };
> +
> + pinctrl_ecspi3_flwp: ecspi3flwp {

Ditto

> + fsl,pins = <
> + MX6QDL_PAD_DISP0_DAT6__GPIO4_IO27 0x80000000
> + >;
> + };
> +
> + 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 0x1b0b0
> + MX6QDL_PAD_RGMII_TD0__RGMII_TD0 0x1b0b0
> + MX6QDL_PAD_RGMII_TD1__RGMII_TD1 0x1b0b0
> + MX6QDL_PAD_RGMII_TD2__RGMII_TD2 0x1b0b0
> + MX6QDL_PAD_RGMII_TD3__RGMII_TD3 0x1b0b0
> + MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL 0x1b0b0
> + MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK 0x1b0b0
> + MX6QDL_PAD_RGMII_RXC__RGMII_RXC 0x1b0b0
> + MX6QDL_PAD_RGMII_RD0__RGMII_RD0 0x1b0b0
> + MX6QDL_PAD_RGMII_RD1__RGMII_RD1 0x1b0b0
> + MX6QDL_PAD_RGMII_RD2__RGMII_RD2 0x1b0b0
> + MX6QDL_PAD_RGMII_RD3__RGMII_RD3 0x1b0b0
> + MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL 0x1b0b0
> + MX6QDL_PAD_GPIO_16__ENET_REF_CLK 0x4001b0a8
> + MX6QDL_PAD_GPIO_6__ENET_IRQ 0x000b1
> + MX6QDL_PAD_ENET_RXD0__GPIO1_IO27 0x1b0b0
> + >;
> + };
> +
> + pinctrl_i2c1: i2c1grp {
> + fsl,pins = <
> + MX6QDL_PAD_CSI0_DAT9__I2C1_SCL 0x4001b8b1
> + MX6QDL_PAD_CSI0_DAT8__I2C1_SDA 0x4001b8b1
> + >;
> + };
> +
> + pinctrl_i2c2: i2c2grp {
> + fsl,pins = <
> + MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b8b1
> + MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b8b1
> + >;
> + };
> +
> + pinctrl_pwm2: pwm2grp {
> + fsl,pins = <
> + MX6QDL_PAD_GPIO_1__PWM2_OUT 0x1b0b1
> + >;
> + };
> +
> + pinctrl_reg_lvds: req_lvds_grp {

reglvdsgrp

> + fsl,pins = <
> + /* LVDS_PPEN_OUT */
> + MX6QDL_PAD_SD1_DAT2__GPIO1_IO19 0x1b0b0
> + >;
> + };
> +
> + pinctrl_uart1: uart1grp {
> + fsl,pins = <
> + MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA 0x1b0b1
> + MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
> + >;
> + };
> +
> + pinctrl_uart4: uart4grp {
> + fsl,pins = <
> + MX6QDL_PAD_KEY_COL0__UART4_TX_DATA 0x1b0b1
> + MX6QDL_PAD_KEY_ROW0__UART4_RX_DATA 0x1b0b1
> + MX6QDL_PAD_CSI0_DAT16__UART4_RTS_B 0x1b0b1
> + MX6QDL_PAD_CSI0_DAT17__UART4_CTS_B 0x1b0b1
> + >;
> + };
> +
> + 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
> + MX6QDL_PAD_GPIO_4__GPIO1_IO04 0x1b0b1
> + >;
> + };
> +
> + 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
> + MX6QDL_PAD_SD3_DAT4__SD3_DATA4 0x17059
> + MX6QDL_PAD_SD3_DAT5__SD3_DATA5 0x17059
> + MX6QDL_PAD_SD3_DAT6__SD3_DATA6 0x17059
> + MX6QDL_PAD_SD3_DAT7__SD3_DATA7 0x17059
> + MX6QDL_PAD_SD3_RST__SD3_RESET 0x17059
> + >;
> + };
> +
> + pinctrl_weim_cs0: weimcs0grp {
> + fsl,pins = <
> + MX6QDL_PAD_EIM_CS0__EIM_CS0_B 0xb0b1
> + >;
> + };
> +
> + pinctrl_weim_nor: weimnorgrp {
> + fsl,pins = <
> + MX6QDL_PAD_EIM_OE__EIM_OE_B 0xb0b1
> + MX6QDL_PAD_EIM_RW__EIM_RW 0xb0b1
> + MX6QDL_PAD_EIM_WAIT__EIM_WAIT_B 0xb060
> + MX6QDL_PAD_EIM_D16__EIM_DATA16 0x1b0b0
> + MX6QDL_PAD_EIM_D17__EIM_DATA17 0x1b0b0
> + MX6QDL_PAD_EIM_D18__EIM_DATA18 0x1b0b0
> + MX6QDL_PAD_EIM_D19__EIM_DATA19 0x1b0b0
> + MX6QDL_PAD_EIM_D20__EIM_DATA20 0x1b0b0
> + MX6QDL_PAD_EIM_D21__EIM_DATA21 0x1b0b0
> + MX6QDL_PAD_EIM_D22__EIM_DATA22 0x1b0b0
> + MX6QDL_PAD_EIM_D23__EIM_DATA23 0x1b0b0
> + MX6QDL_PAD_EIM_D24__EIM_DATA24 0x1b0b0
> + MX6QDL_PAD_EIM_D25__EIM_DATA25 0x1b0b0
> + MX6QDL_PAD_EIM_D26__EIM_DATA26 0x1b0b0
> + MX6QDL_PAD_EIM_D27__EIM_DATA27 0x1b0b0
> + MX6QDL_PAD_EIM_D28__EIM_DATA28 0x1b0b0
> + MX6QDL_PAD_EIM_D29__EIM_DATA29 0x1b0b0
> + MX6QDL_PAD_EIM_D30__EIM_DATA30 0x1b0b0
> + MX6QDL_PAD_EIM_D31__EIM_DATA31 0x1b0b0
> + MX6QDL_PAD_EIM_A23__EIM_ADDR23 0xb0b1
> + MX6QDL_PAD_EIM_A22__EIM_ADDR22 0xb0b1
> + MX6QDL_PAD_EIM_A21__EIM_ADDR21 0xb0b1
> + MX6QDL_PAD_EIM_A20__EIM_ADDR20 0xb0b1
> + MX6QDL_PAD_EIM_A19__EIM_ADDR19 0xb0b1
> + MX6QDL_PAD_EIM_A18__EIM_ADDR18 0xb0b1
> + MX6QDL_PAD_EIM_A17__EIM_ADDR17 0xb0b1
> + MX6QDL_PAD_EIM_A16__EIM_ADDR16 0xb0b1
> + MX6QDL_PAD_EIM_DA15__EIM_AD15 0xb0b1
> + MX6QDL_PAD_EIM_DA14__EIM_AD14 0xb0b1
> + MX6QDL_PAD_EIM_DA13__EIM_AD13 0xb0b1
> + MX6QDL_PAD_EIM_DA12__EIM_AD12 0xb0b1
> + MX6QDL_PAD_EIM_DA11__EIM_AD11 0xb0b1
> + MX6QDL_PAD_EIM_DA10__EIM_AD10 0xb0b1
> + MX6QDL_PAD_EIM_DA9__EIM_AD09 0xb0b1
> + MX6QDL_PAD_EIM_DA8__EIM_AD08 0xb0b1
> + MX6QDL_PAD_EIM_DA7__EIM_AD07 0xb0b1
> + MX6QDL_PAD_EIM_DA6__EIM_AD06 0xb0b1
> + MX6QDL_PAD_EIM_DA5__EIM_AD05 0xb0b1
> + MX6QDL_PAD_EIM_DA4__EIM_AD04 0xb0b1
> + MX6QDL_PAD_EIM_DA3__EIM_AD03 0xb0b1
> + MX6QDL_PAD_EIM_DA2__EIM_AD02 0xb0b1
> + MX6QDL_PAD_EIM_DA1__EIM_AD01 0xb0b1
> + MX6QDL_PAD_EIM_DA0__EIM_AD00 0xb0b1
> + >;
> + };
> + };
> +};
> +
> +&ecspi3 {
> + cs-gpios = <&gpio4 24 0>;

GPIO_ACTIVE_HIGH?

> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_ecspi3 &pinctrl_ecspi3_cs &pinctrl_ecspi3_flwp>;
> + status = "okay";
> +
> + flash: s25sl032p@0 {

Node name should be as generic as possible, while label name can be
specific. That said, 's25sl032p: flash@0' should be better.

> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "spansion,s25sl032p", "jedec,spi-nor";

"spansion,s25sl032p" doesn't seem to be documented. Can it be dropped?

> + spi-max-frequency = <40000000>;
> + reg = <0>;
> + };
> +};
> +
> +&fec {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_enet>;
> + phy-mode = "rgmii";
> + phy-reset-gpios = <&gpio1 27 0>;

GPIO_ACTIVE_xxx? But you probably need GPIO_ACTIVE_LOW.

> + interrupts-extended = <&gpio1 6 IRQ_TYPE_LEVEL_HIGH>,
> + <&intc 0 119 IRQ_TYPE_LEVEL_HIGH>;
> + status = "okay";
> +};
> +
> +&i2c1 {
> + clock-frequency = <100000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_i2c1>;
> + status = "okay";
> +};
> +
> +&i2c2 {
> + clock-frequency = <100000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_i2c2>;
> + status = "okay";
> +
> + pmic: pfuze100@08 {

pfuze100: pmic@08

> + 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 = <3950000>;
> + 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;
> + };
> +
> + sw4_reg: sw4 {
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + };
> +
> + 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>;
> + };
> +
> + 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;
> + };
> + };
> + };
> +};
> +
> +&ldb {
> + status = "okay";
> +
> + lvds0: lvds-channel@0 {
> + fsl,data-mapping = "spwg";
> + fsl,data-width = <24>;
> + status = "okay";
> +
> + port@4 {
> + reg = <4>;
> +
> + lvds0_out: endpoint {
> + remote-endpoint = <&panel_in_lvds0>;
> + };
> + };
> + };
> +};
> +
> +&pwm2 {
> + #pwm-cells = <3>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pwm2>;
> + status = "okay";
> +};
> +
> +&uart1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_uart1>;
> + status = "okay";
> +};
> +
> +&uart4 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_uart4>;
> + uart-has-rtscts;
> + status = "okay";
> +};
> +
> +&usdhc2 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usdhc2>;
> + cd-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
> + bus-width = <4>;
> + status = "okay";
> +};
> +
> +&usdhc3 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usdhc3>;
> + bus-width = <8>;
> + non-removable;
> + status = "okay";
> +};
> +
> +&weim {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_weim_nor &pinctrl_weim_cs0>;
> + #address-cells = <2>;
> + #size-cells = <1>;

These two properties can be saved from board dts since commit
1be81ea58607 ("ARM: dts: imx6: Add imx-weim parameters to dtsi's").

Shawn

> + ranges = <0 0 0x08000000 0x08000000>;
> + status = "okay";
> +
> + nor@0,0 {
> + compatible = "cfi-flash";
> + reg = <0 0 0x02000000>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + bank-width = <2>;
> + use-advanced-sector-protection;
> + fsl,weim-cs-timing = <0x00620081 0x00000001 0x1c022000
> + 0x0000c000 0x1404a38e 0x00000000>;
> + };
> +};
> --
> 2.1.4
>

Next message: Stephen Rothwell: "linux-next: manual merge of the drm-misc tree with the drm-intel tree"
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