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Date: Wed, 27 Apr 2022 15:52:06 +0200
From: pro@...x.de
To: Fabio Estevam <festevam@...il.com>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
NXP Linux Team <linux-imx@....com>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Winker Matthias <Matthias.Winker@...bosch.com>
Subject: Re: [PATCH v2 2/2] ARM: dts: Add bosch acc board
Hi Fabio,
thank you for the review. All comments will be incorporated in v3.
On 2022-04-21 22:42, Fabio Estevam wrote:
> Hi Philip,
>
> On Thu, Apr 21, 2022 at 9:26 AM Philip Oberfichtner <pro@...x.de>
> wrote:
>>
>> +/dts-v1/;
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/leds/common.h>
>> +#include "imx6q.dtsi"
>> +
>> +/ {
>> + model = "Bosch ACC";
>> + compatible = "bosch,imx6q-acc", "fsl,imx6q";
>> +
>> + aliases {
>> + serial0 = &uart2;
>> + serial1 = &uart1;
>> +
>
> Unneeded blank line. Please remove it.
>
>> + i2c0 = &i2c1;
>> + i2c1 = &i2c2;
>> + i2c2 = &i2c3;
>> + /* eMMC is connected to USDHC interface 4, but shall
>> get the name 0 */
>
> Unneeded comment. Please remove it.
>
>> + mmc0 = &usdhc4;
>> + /* SC-Cards is connected to USDHC interface 2, but
>> shall get the name 1 */
>
> Ditto.
>
>> + mmc1 = &usdhc2;
>> + };
>> +
>> + backlight {
>> + compatible = "pwm-backlight";
>> + /* The last value is the PWM period in nano-seconds!
>> + * -> 5 kHz = 200 µS = 200.000 ns
>> + */
>
> This is not the correct style for multi-line comments.
>
> It should be:
>
> /*
> * bla bla
> * bla bla
> */
>
> Actually, I think you could just remove these comments.
>
>> + pwms = <&pwm1 0 200000>;
>> + brightness-levels = <0 61 499 1706 4079 8022 13938
>> 22237 33328 47623 65535>;
>> + num-interpolated-steps = <10>;
>> + default-brightness-level = <60>;
>> + power-supply = <®_lcd0_pwr>;
>> + };
>> +
>> + refclk: refclk {
>> + compatible = "fixed-factor-clock";
>> + #clock-cells = <0>;
>> +
>
> Unnecessary blank line.
>
>> + clocks = <&clks IMX6QDL_CLK_CKO2>;
>> + clock-div = <1>;
>> + clock-mult = <1>;
>> + clock-output-names = "12mhz_refclk";
>
> Ditto.
>
>> +
>> + gpio-leds {
>> + compatible = "gpio-leds";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_reset_gpio_led>;
>> +
>> + led-2 {
>> + color = <LED_COLOR_ID_RED>;
>> + gpios = <&gpio5 18 0>;
>
> Better use GPIO label:
>
> gpios = <&gpio5 18 GPIO_ACTIVE_HIGH>;
>
>> + memory@...00000 {
>> + device_type = "memory";
>> + reg = <0x10000000 0x40000000>;
>> + };
>
> Please put the memory node below the alias.
>
>> +
>> + supply_5P0: regulator-0 {
>
> Please check arch/arm/boot/dts/imx6qdl-sabresd.dtsi for a reference
> on how to name the regulators.
>
>> + soc {
>> + aips1: bus@...0000 {};
>
> Why is this needed?
>
>> +&audmux {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_audmux>;
>> + status = "okay";
>
> Is this needed? I don't see audio support present on this board.
>
>> +&fec {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_enet>;
>> + status = "okay";
>
> Please move the status property as the last one.
>
> No need for blank lines.
>> +
>> + clocks = <&clks IMX6QDL_CLK_ENET>,
>> + <&clks IMX6QDL_CLK_ENET>,
>> + <&clks IMX6QDL_CLK_ENET>,
>> + <&clks IMX6QDL_CLK_ENET_REF>;
>> + clock-names = "ipg", "ahb", "ptp", "enet_out";
>> + phy-mode = "rmii";
>> + phy-supply = <&supply_sw4_3V3>;
>> + phy-handle = <ðphy>;
>> +
>> + mdio {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + ethphy: ethernet-phy@0 {
>> + compatible = "ethernet-phy-ieee802.3-c22";
>> + reg = <0>;
>> + interrupt-parent = <&gpio1>;
>> + interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
>> + smsc,disable-energy-detect;
>> + };
>> + };
>> +};
>
>> + lm75: sensor@49 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_lm75>;
>> +
>
> Uneeded blank line.
>
>> + pmic: pmic@8 {
>> + compatible = "fsl,pfuze100";
>> + reg = <0x08>;
>> +
>> + regulators {
>> + /*
>> + * VDD_CORE is connected to SW1 ABC
>> + * We need to define sw1ab and sw1c, but later
>> it is controlled solely with
>> + * sw1c and therefore only this is named
>> "VDD_SOC".
>> + * See PMIC datasheet Rev. 18, chapter
>> 6.4.4.3.1: "The feedback and all
>> + * other controls are accomplished by use of
>> pin SW1CFB and SW1C control
>> + * registers, respectively."
>> + * Setting min and max according to SOC
>> datasheet
>> + */
>> + pmic_sw1abc: sw1c {
>> + regulator-name = "VDD_SOC (sw1abc)";
>> + regulator-min-microvolt = <1275000>;
>> + regulator-max-microvolt = <1500000>;
>> + regulator-boot-on;
>> + regulator-always-on;
>> + regulator-ramp-delay = <6250>;
>> +
>> + default-voltage = <1300000>;
>
> This is not a valid property.
>
>> +
>> + pmic_sw2: sw2 {
>> + regulator-name = "VDD_ARM (sw2)";
>> + regulator-min-microvolt = <1050000>;
>> + regulator-max-microvolt = <1500000>;
>> + regulator-boot-on;
>> + regulator-always-on;
>> + regulator-ramp-delay = <6250>;
>> +
>
> Unneeded blank line.
>
>> + default-voltage = <1300000>;
>
> Invalid property.
>
>> +&i2c3 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_i2c3>;
>> + clock-frequency = <400000>;
>> + status = "okay";
>> +
>> + exc3000: touchscreen@2a {
>> + compatible = "eeti,exc3000";
>> + reg = <0x2a>;
>> +
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_ctouch>;
>> +
>> + interrupt-parent = <&gpio4>;
>> + interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
>> +
>> + touchscreen-size-x = <4096>;
>> + touchscreen-size-y = <4096>;
>
> Remove all the blank lines.
>
>> +&iomuxc {
>
> We usually put the iomuxc node as the last one.
>
>> + pinctrl_gpio_export_gpio_fixed_in:
>> pinctrl-gpio-export-gpio-fixed-in-grp {
>
> Not referenced anywhere.
>
>> + fsl,pins = <
>> + MX6QDL_PAD_KEY_COL2__GPIO4_IO10
>> 0x80000000 /* CLEAR ALL */
>> + MX6QDL_PAD_CSI0_DAT4__GPIO5_IO22
>> 0x80000000 /* DIG_IN_1 */
>> + MX6QDL_PAD_CSI0_DAT5__GPIO5_IO23
>> 0x80000000 /* DIG_IN_2 */
>> + MX6QDL_PAD_SD3_CMD__GPIO7_IO02
>> 0x80000000 /* PoE */
>> + MX6QDL_PAD_SD3_CLK__GPIO7_IO03
>> 0x80000000 /* PoE T2P */
>> + >;
>> + };
>> +
>> + pinctrl_reset_gpio_led: pinctrl-reset-gpio-led-pin {
>
> pinctrl_reset_gpio_led: pinctrl-reset-gpio-led-grp
>
>> + fsl,pins = <
>> + MX6QDL_PAD_CSI0_PIXCLK__GPIO5_IO18
>> 0x80000000
>
> Please avoid 0x80000000. Use the real pad setting instead.
>
>> + >;
>> + };
>> +
>> + pinctrl_gpio_export_gpio_fixed_out:
>> pinctrl-gpio-export-gpio-fixed-out-grp {
>
> This is not called anywhere. Please check globally.
>
>> + fsl,pins = <
>> + MX6QDL_PAD_CSI0_DAT6__GPIO5_IO24
>> 0x0001B0B0 /* DIG_OUT_1 */
>
> 0x1b0b0 for consistency. Please check globally.
>
>
>> + pinctrl_i2c2: i2c2grp {
>> + fsl,pins = <
>> + MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b810
>> + MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b810
>> + /* NO SRE | 130 Ohm | SPEED LOW | Open Drain |
>> PKE | PUE | 100k PU | HYS */
>
> No need for comment.
>
>> + pinctrl_i2c2_gpio: i2c2-gpiogrp {
>> + fsl,pins = <
>> + MX6QDL_PAD_KEY_COL3__GPIO4_IO12 0x80000000
>
> Avoid 0x80000000. Please check globally.
>
>> + lvds0: lvds-channel@0 {
>> + fsl,data-mapping = "spwg";
>> + fsl,data-width = <24>;
>> +
>> + display-timings {
>> + native-mode = <&lvds0_timing0>;
>> + lvds0_timing0: timing0 {
>> + clock-frequency = <79479000>;
>
> Please add this panel support in drivers/gpu/drm/panel/panel-simple.c
> and then reference its compatible here.
>
>> +&sdma {
>> + fsl,sdma-ram-script-name = "imx/sdma/sdma-imx6q.bin";
>
> Why is this needed?
>
>> + iram = <&ocram>;
>
> Not a valid property for sdma.
>
>
>> +&uart1 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_uart1>;
>> + status = "okay";
>> +
>> + rts-gpios = <&gpio7 8 0>;
>
> Use GPIO label.
>
>> + linux,rs485-enabled-at-boot-time;
>> + rs485-rx-during-tx;
>> +};
>> +
>> +&uart2 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_uart2>;
>> + fsl,uart-has-rtscts;
>
> s/ fsl,uart-has-rtscts/uart-has-rtscts;
>
>> +&usbh2 {
>> + pinctrl-names = "idle", "active";
>> + pinctrl-0 = <&pinctrl_usbh2_idle>;
>> + pinctrl-1 = <&pinctrl_usbh2_active>;
>> + status = "okay";
>> +
>> + vbus-supply = <®_usb_h2_vbus>;
>> + osc-clkgate-delay = <0x3>;
>
> Not a valid property.
>
>> + pad-supply = <&vgen2_reg>;
>
> Not a valid property.
--
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