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SubjectRe: [PATCH 2/3] ARM: dts: stm32: add STM32MP1-based Linux Automation MC-1 board
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Hi Ahmad

Thanks for adding a new STM32 board. Some minor comments.

On 2/26/20 3:38 PM, Ahmad Fatoum wrote:
> The Linux Automation MC-1 is a SBC built around the Octavo Systems
> OSD32MP15x SiP. The SiP features up to 1 GB DDR3 RAM, EEPROM and
> a PMIC. The board has eMMC and a SD slot for storage and GbE
> for both connectivity and power.
>
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de
> ---
> arch/arm/boot/dts/Makefile | 3 +-
> arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts | 367 ++++++++++++++++++++++
> arch/arm/boot/dts/stm32mp15xx-osd32.dtsi | 229 ++++++++++++++
> 3 files changed, 598 insertions(+), 1 deletion(-)
> create mode 100644 arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
> create mode 100644 arch/arm/boot/dts/stm32mp15xx-osd32.dtsi
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index d6546d2676b9..47db736ec4aa 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -1018,7 +1018,8 @@ dtb-$(CONFIG_ARCH_STM32) += \
> stm32mp157a-dk1.dtb \
> stm32mp157c-dk2.dtb \
> stm32mp157c-ed1.dtb \
> - stm32mp157c-ev1.dtb
> + stm32mp157c-ev1.dtb \
> + stm32mp157c-lxa-mc1.dtb
> dtb-$(CONFIG_MACH_SUN4I) += \
> sun4i-a10-a1000.dtb \
> sun4i-a10-ba10-tvbox.dtb \
> diff --git a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
> new file mode 100644
> index 000000000000..70fad7a2f2af
> --- /dev/null
> +++ b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
> @@ -0,0 +1,367 @@
> +/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause) */
> +/*
> + * Copyright (C) 2020 STMicroelectronics - All Rights Reserved
> + * Copyright (C) 2020 Ahmad Fatoum, Pengutronix
> + */
> +
> +/dts-v1/;
> +
> +#include "stm32mp157.dtsi"
> +#include "stm32mp15xx-osd32.dtsi"
> +#include "stm32mp15xxac-pinctrl.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/pwm/pwm.h>
> +
> +/ {
> + model = "Linux Automation MC-1 board";
> + compatible = "lxa,stm32mp157c-mc1", "st,stm32mp157";
> +
> + aliases {
> + ethernet0 = &ethernet0;
> + mmc0 = &sdmmc1;
> + mmc1 = &sdmmc2;
> + serial0 = &uart4;
> + };
> +
> + backlight: backlight {
> + compatible = "pwm-backlight";
> + pwms = <&backlight_pwm 1 100000 PWM_POLARITY_INVERTED>;
> + brightness-levels = <0 31 63 95 127 159 191 223 255>;
> + default-brightness-level = <7>;
> + power-supply = <&reg_5v2>; /* 3V3_BACKLIGHT */
> + };
> +
> + chosen {
> + stdout-path = &uart4;
> + };
> +
> + led-act {
> + compatible = "gpio-leds";
> +
> + led-green {
> + label = "mc1:green:act";
> + gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
> + linux,default-trigger = "heartbeat";
> + default-state = "off";
> + };
> + };
> +
> + led-rgb {
> + compatible = "pwm-leds";
> +
> + led-red {
> + label = "mc1:red:rgb";
> + pwms = <&leds_pwm 1 1000000 0>;
> + max-brightness = <255>;
> + active-low;
> + };
> +
> + led-green {
> + label = "mc1:green:rgb";
> + pwms = <&leds_pwm 2 1000000 0>;
> + max-brightness = <255>;
> + active-low;
> + };
> +
> + led-blue {
> + label = "mc1:blue:rgb";
> + pwms = <&leds_pwm 3 1000000 0>;
> + max-brightness = <255>;
> + active-low;
> + };
> + };
> +
> + panel: panel {
> + compatible = "edt,etm0700g0edh6", "simple-panel";
> + backlight = <&backlight>;
> + enable-gpios = <&gpiod 4 GPIO_ACTIVE_HIGH>;
> + power-supply = <&reg_3v3>;
> +
> + port {
> + panel_input: endpoint {
> + remote-endpoint = <&ltdc_ep0_out>;
> + };
> + };
> + };
> +
> + reg_3v3: regulator_3v3 {
> + compatible = "regulator-fixed";
> + regulator-name = "3V3";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-always-on;
> + vin-supply = <&v3v3>;
> + };
> +
> + /* supplied by either debug board or PoE */
> + reg_5v2: regulator_5v2 {
> + compatible = "regulator-fixed";
> + regulator-name = "5V2";
> + regulator-min-microvolt = <5200000>;
> + regulator-max-microvolt = <5200000>;
> + regulator-always-on;
> + };
> +};
> +
> +&gpioz {
> + gpio-line-names = "HWID0", "HWID1", "HWID2", "HWID3", "", "",
> + "HWID4", "HWID5";
> +};
> +
> +&gpu {
> + status = "okay";
> +};
> +
> +&ethernet0 {

you could follow alphabetic ordering (I find it easier to read, but just
my opinion).

> + pinctrl-names = "default";
> + pinctrl-0 = <&eth_rgmii_pins>;
> + phy-mode = "rgmii-id";
> + phy-handle = <&ethphy>;
> + status = "okay";
> +
> + mdio0 {
> + compatible = "snps,dwmac-mdio";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + ethphy: ethernet-phy@3 { /* KSZ9031RN */
> + reg = <3>;
> + reset-gpios = <&gpiog 0 GPIO_ACTIVE_LOW>; /* ETH_RST# */
> + interrupt-parent = <&gpioa>;
> + interrupts = <6 IRQ_TYPE_EDGE_FALLING>; /* ETH_MDINT# */
> + rxc-skew-ps = <1860>;
> + txc-skew-ps = <1860>;
> + reset-assert-us = <10000>;
> + reset-deassert-us = <300>;
> + micrel,force-master;
> + };
> + };
> +};
> +
> +&i2c5 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c5_pins>;
> + clock-frequency = <400000>;
> + status = "okay";
> +
> + touchscreen@38 {
> + compatible = "edt,edt-ft5x06";
> + interrupt-parent = <&gpiod>;
> + interrupts = <11 IRQ_TYPE_EDGE_FALLING>; /* TOUCH_INT# */
> + vcc-supply = <&reg_3v3>;
> + reg = <0x38>;
> + reset-gpios = <&gpiof 8 GPIO_ACTIVE_LOW>; /* TOUCH_RESET# */
> + touchscreen-size-x = <1792>;
> + touchscreen-size-y = <1024>;
> + wakeup-source;
> + };
> +};
> +
> +&ltdc {
> + pinctrl-names = "default";
> + pinctrl-0 = <&ltdc_pins>;
> + status = "okay";
> +
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + ltdc_ep0_out: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&panel_input>;
> + };
> + };
> +};
> +
> +&pmic {
> + regulators {
> + buck4-supply = <&reg_5v2>; /* VIN */
> + ldo2-supply = <&reg_5v2>; /* PMIC_LDO25IN */
> + ldo5-supply = <&reg_5v2>; /* PMIC_LDO25IN */
> + boost-supply = <&reg_5v2>; /* PMIC_BSTIN */
> + pwr_sw2-supply = <&bst_out>; /* PMIC_SWIN */
> + };
> +};
> +
> +&sdmmc1 {
> + pinctrl-names = "default", "opendrain";
> + pinctrl-0 = <&sdmmc1_b4_pu_pins_a>;
> + pinctrl-1 = <&sdmmc1_b4_od_pins_a>;
> + bus-width = <4>;
> + cd-gpios = <&gpioh 3 GPIO_ACTIVE_LOW>;
> + disable-wp;
> + no-1-8-v;
> + st,neg-edge;
> + vmmc-supply = <&reg_3v3>;
> + status = "okay";
> +};
> +
> +&sdmmc2 {
> + pinctrl-names = "default", "opendrain";
> + pinctrl-0 = <&sdmmc2_b4_pins_a &sdmmc2_d47_pins_b>;
> + pinctrl-1 = <&sdmmc2_b4_od_pins_a &sdmmc2_d47_pins_b>;
> + bus-width = <8>;
> + no-1-8-v;
> + no-sd;
> + no-sdio;
> + non-removable;
> + st,neg-edge;
> + vmmc-supply = <&reg_3v3>;
> + status = "okay";
> +};
> +
> +&timers3 {
> + status = "okay";
> +
> + backlight_pwm: pwm {
> + pinctrl-names = "default";
> + pinctrl-0 = <&tim3_pwm_pins>;
> + status = "okay";
> + };
> +};
> +
> +&timers5 {
> + status = "okay";
> +
> + leds_pwm: pwm {
> + pinctrl-names = "default";
> + pinctrl-0 = <&tim5_pwm_pins>;
> + status = "okay";
> + };
> +};
> +
> +&uart4 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart4_pins_a>;
> + status = "okay";
> +};
> +
> +&pinctrl {

Pin groups are currently defined in stm32mp15-pinctrl.dtsi. You could
move this part.

> + eth_rgmii_pins: eth_rgmii {
> + pins1 {
> + pinmux = <STM32_PINMUX('G', 5, AF11)>, /* ETH_CLK125 */
> + <STM32_PINMUX('G', 4, AF11)>, /* ETH_GTX_CLK */
> + <STM32_PINMUX('G', 13, AF11)>, /* ETH_TXD0 */
> + <STM32_PINMUX('G', 14, AF11)>, /* ETH_TXD1 */
> + <STM32_PINMUX('C', 2, AF11)>, /* ETH_TXD2 */
> + <STM32_PINMUX('E', 2, AF11)>, /* ETH_TXD3 */
> + <STM32_PINMUX('B', 11, AF11)>, /* ETH_TX_CTL */
> + <STM32_PINMUX('C', 1, AF11)>; /* ETH_MDC */
> + bias-disable;
> + drive-push-pull;
> + slew-rate = <2>;
> + };
> + pins2 {
> + pinmux = <STM32_PINMUX('C', 4, AF11)>, /* ETH_RXD0 */
> + <STM32_PINMUX('C', 5, AF11)>, /* ETH_RXD1 */
> + <STM32_PINMUX('H', 6, AF11)>, /* ETH_RXD2 */
> + <STM32_PINMUX('H', 7, AF11)>, /* ETH_RXD3 */
> + <STM32_PINMUX('A', 1, AF11)>, /* ETH_RX_CLK */
> + <STM32_PINMUX('A', 7, AF11)>; /* ETH_RX_CTL */
> + bias-disable;
> + };
> + pins3 {
> + pinmux = <STM32_PINMUX('A', 2, AF11)>; /* ETH_MDIO */
> + bias-disable;
> + drive-push-pull;
> + slew-rate = <0>;
> + };
> + };
> +
> + i2c5_pins: i2c5 {
> + pins {
> + pinmux = <STM32_PINMUX('D', 0, AF4)>, /* TOUCH_SDA */
> + <STM32_PINMUX('D', 1, AF4)>; /* TOUCH_SCL */
> + bias-disable;
> + drive-open-drain;
> + slew-rate = <0>;
> + };
> + };
> +
> + ltdc_pins: ltdc {
> + pins1 {
> + pinmux = <STM32_PINMUX('B', 1, AF9)>, /* LTDC_R6 */
> + <STM32_PINMUX('B', 9, AF14)>, /* LTDC_B7 */
> + <STM32_PINMUX('C', 0, AF14)>, /* LTDC_R5 */
> + <STM32_PINMUX('D', 3, AF14)>, /* LTDC_G7 */
> + <STM32_PINMUX('D', 6, AF14)>, /* LTDC_B2 */
> + <STM32_PINMUX('D', 10, AF14)>, /* LTDC_B3 */
> + <STM32_PINMUX('E', 11, AF14)>, /* LTDC_G3 */
> + <STM32_PINMUX('E', 12, AF14)>, /* LTDC_B4 */
> + <STM32_PINMUX('E', 13, AF14)>, /* LTDC_DE */
> + <STM32_PINMUX('E', 15, AF14)>, /* LTDC_R7 */
> + <STM32_PINMUX('H', 4, AF9)>, /* LTDC_G5 */
> + <STM32_PINMUX('H', 8, AF14)>, /* LTDC_R2 */
> + <STM32_PINMUX('H', 9, AF14)>, /* LTDC_R3 */
> + <STM32_PINMUX('H', 10, AF14)>, /* LTDC_R4 */
> + <STM32_PINMUX('H', 13, AF14)>, /* LTDC_G2 */
> + <STM32_PINMUX('H', 15, AF14)>, /* LTDC_G4 */
> + <STM32_PINMUX('I', 1, AF14)>, /* LTDC_G6 */
> + <STM32_PINMUX('I', 5, AF14)>, /* LTDC_B5 */
> + <STM32_PINMUX('I', 6, AF14)>, /* LTDC_B6 */
> + <STM32_PINMUX('I', 9, AF14)>, /* LTDC_VSYNC */
> + <STM32_PINMUX('I', 10, AF14)>; /* LTDC_HSYNC */
> + bias-disable;
> + drive-push-pull;
> + slew-rate = <0>;
> + };
> + pins2 {
> + pinmux = <STM32_PINMUX('E', 14, AF14)>; /* LTDC_CLK */
> + bias-disable;
> + drive-push-pull;
> + slew-rate = <1>;
> + };
> + };
> +
> + sdmmc1_b4_pu_pins_a: sdmmc1-pu-b4-0 {
> + pins1 {
> + pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
> + <STM32_PINMUX('C', 9, AF12)>, /* SDMMC1_D1 */
> + <STM32_PINMUX('C', 10, AF12)>, /* SDMMC1_D2 */
> + <STM32_PINMUX('C', 11, AF12)>, /* SDMMC1_D3 */
> + <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */
> + slew-rate = <1>;
> + drive-push-pull;
> + bias-pull-up;
> + };
> + pins2 {
> + pinmux = <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */
> + slew-rate = <2>;
> + drive-push-pull;
> + bias-pull-up;
> + };
> + };
> +
> + sdmmc2_d47_pins_b: sdmmc2-d47-1 {
> + pins {
> + pinmux = <STM32_PINMUX('A', 8, AF9)>, /* eMMC_D4 */
> + <STM32_PINMUX('A', 9, AF10)>, /* eMMC_D5 */
> + <STM32_PINMUX('C', 6, AF10)>, /* eMMC_D6 */
> + <STM32_PINMUX('C', 7, AF10)>; /* eMMC_D7 */
> + slew-rate = <1>;
> + drive-push-pull;
> + bias-disable;
> + };
> + };
> +
> + tim3_pwm_pins: tim3_pwm {
> + pins {
> + pinmux = <STM32_PINMUX('B', 5, AF2)>; /* TIM3_CH2 */
> + bias-disable;
> + drive-push-pull;
> + slew-rate = <0>;
> + };
> + };
> +
> + tim5_pwm_pins: tim5_pwm {
> + pins {
> + pinmux = <STM32_PINMUX('H', 11, AF2)>, /* TIM5_CH2 */
> + <STM32_PINMUX('H', 12, AF2)>, /* TIM5_CH3 */
> + <STM32_PINMUX('I', 0, AF2)>; /* TIM5_CH4 */
> + bias-disable;
> + drive-push-pull;
> + slew-rate = <0>;
> + };
> + };
> +};
> diff --git a/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi b/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi
> new file mode 100644
> index 000000000000..70ee1c9aa8ec
> --- /dev/null
> +++ b/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi
> @@ -0,0 +1,229 @@
> +/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause) */
> +/*
> + * Copyright (C) 2020 STMicroelectronics - All Rights Reserved
> + * Copyright (C) 2020 Ahmad Fatoum, Pengutronix
> + */
> +
> +#include "stm32mp15-pinctrl.dtsi"
> +
> +#include <dt-bindings/mfd/st,stpmic1.h>
> +
> +/ {
> + reserved-memory {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> +
> + mcuram2: mcuram2@10000000 {
> + compatible = "shared-dma-pool";
> + reg = <0x10000000 0x40000>;
> + no-map;
> + };
> +
> + vdev0vring0: vdev0vring0@10040000 {
> + compatible = "shared-dma-pool";
> + reg = <0x10040000 0x1000>;
> + no-map;
> + };
> +
> + vdev0vring1: vdev0vring1@10041000 {
> + compatible = "shared-dma-pool";
> + reg = <0x10041000 0x1000>;
> + no-map;
> + };
> +
> + vdev0buffer: vdev0buffer@10042000 {
> + compatible = "shared-dma-pool";
> + reg = <0x10042000 0x4000>;
> + no-map;
> + };
> +
> + mcuram: mcuram@30000000 {
> + compatible = "shared-dma-pool";
> + reg = <0x30000000 0x40000>;
> + no-map;
> + };
> +
> + retram: retram@38000000 {
> + compatible = "shared-dma-pool";
> + reg = <0x38000000 0x10000>;
> + no-map;
> + };
> + };
> +
> + reg_sip_eeprom: regulator_eeprom {
> + compatible = "regulator-fixed";
> + regulator-name = "sip_eeprom";
> + regulator-always-on;
> + };
> +};
> +
> +&i2c4 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c4_pins_a>;
> + clock-frequency = <400000>;
> + i2c-scl-rising-time-ns = <185>;
> + i2c-scl-falling-time-ns = <20>;
> + status = "okay";
> +
> + pmic: stpmic@33 {
> + compatible = "st,stpmic1";
> + reg = <0x33>;
> + interrupts-extended = <&gpioa 0 IRQ_TYPE_EDGE_FALLING>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> +
> + regulators {
> + compatible = "st,stpmic1-regulators";
> +
> + ldo1-supply = <&v3v3>;
> + ldo6-supply = <&v3v3>;
> + pwr_sw1-supply = <&bst_out>;
> +
> + vddcore: buck1 {
> + regulator-name = "vddcore";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1350000>;
> + regulator-always-on;
> + regulator-initial-mode = <0>;
> + regulator-over-current-protection;
> + };
> +
> + vdd_ddr: buck2 {
> + regulator-name = "vdd_ddr";
> + regulator-min-microvolt = <1350000>;
> + regulator-max-microvolt = <1350000>;
> + regulator-always-on;
> + regulator-initial-mode = <0>;
> + regulator-over-current-protection;
> + };
> +
> + vdd: buck3 {
> + regulator-name = "vdd";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-always-on;
> + st,mask-reset;
> + regulator-initial-mode = <0>;
> + regulator-over-current-protection;
> + };
> +
> + v3v3: buck4 {
> + regulator-name = "v3v3";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-always-on;
> + regulator-over-current-protection;
> + regulator-initial-mode = <0>;
> + };
> +
> + v1v8_audio: ldo1 {
> + regulator-name = "v1v8_audio";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-always-on;
> + interrupts = <IT_CURLIM_LDO1 0>;
> +
> + };
> +
> + v3v3_hdmi: ldo2 {
> + regulator-name = "v3v3_hdmi";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-always-on;
> + interrupts = <IT_CURLIM_LDO2 0>;
> +
> + };
> +
> + vtt_ddr: ldo3 {
> + regulator-name = "vtt_ddr";
> + regulator-min-microvolt = <500000>;
> + regulator-max-microvolt = <750000>;
> + regulator-always-on;
> + regulator-over-current-protection;
> + };
> +
> + vdd_usb: ldo4 {
> + regulator-name = "vdd_usb";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + interrupts = <IT_CURLIM_LDO4 0>;
> + };
> +
> + vdda: ldo5 {
> + regulator-name = "vdda";
> + regulator-min-microvolt = <2900000>;
> + regulator-max-microvolt = <2900000>;
> + interrupts = <IT_CURLIM_LDO5 0>;
> + regulator-boot-on;
> + };
> +
> + v1v2_hdmi: ldo6 {
> + regulator-name = "v1v2_hdmi";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-always-on;
> + interrupts = <IT_CURLIM_LDO6 0>;
> +
> + };
> +
> + vref_ddr: vref_ddr {
> + regulator-name = "vref_ddr";
> + regulator-always-on;
> + regulator-over-current-protection;
> + };
> +
> + bst_out: boost {
> + regulator-name = "bst_out";
> + interrupts = <IT_OCP_BOOST 0>;
> + };
> +
> + vbus_otg: pwr_sw1 {
> + regulator-name = "vbus_otg";
> + interrupts = <IT_OCP_OTG 0>;
> + regulator-active-discharge;
> + };
> +
> + vbus_sw: pwr_sw2 {
> + regulator-name = "vbus_sw";
> + interrupts = <IT_OCP_SWOUT 0>;
> + regulator-active-discharge;
> + };
> + };
> +
> + onkey {
> + compatible = "st,stpmic1-onkey";
> + interrupts = <IT_PONKEY_F 0>, <IT_PONKEY_R 1>;
> + interrupt-names = "onkey-falling", "onkey-rising";
> + };
> +
> + pmic_watchdog: watchdog {
> + compatible = "st,stpmic1-wdt";
> + status = "disabled";
> + };
> + };
> +
> + sip_eeprom: eeprom@50 {
> + compatible = "atmel,24c32";
> + vcc-supply = <&reg_sip_eeprom>;
> + reg = <0x50>;
> + };
> +};
> +
> +&ipcc {
> + status = "okay";
> +};
> +
> +&rng1 {
> + status = "okay";
> +};
> +
> +&m4_rproc {

you could follow alphabetic ordering.

> + memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
> + <&vdev0vring1>, <&vdev0buffer>;
> + mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
> + mbox-names = "vq0", "vq1", "shutdown";
> + interrupt-parent = <&exti>;
> + interrupts = <68 1>;
> + status = "okay";
> +};
>

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