fdts: stm32mp1: add support for Linux Automation MC-1 board

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
PMIC. The board has eMMC and a SD slot for storage.

The SDRAM calibration values are taken as is from the DKx boards, which
seem to be suitable for operation at German room temperature.

This is deemed ok for now, but for use in the field, the SiP will likely
need to have its timings determined in a climate chamber.

Change-Id: I5f43a61930151ae9d1df2ea7d0f6f9697c813ce0
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

2 files changed, 388 insertions, 0 deletions

diff --git a/fdts/stm32mp157c-lxa-mc1.dts b/fdts/stm32mp157c-lxa-mc1.dts
new file mode 100644
index 000000000..7b8e48127
--- /dev/null
+++ b/fdts/stm32mp157c-lxa-mc1.dts
@@ -0,0 +1,107 @@
+/* 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 "stm32mp15xc.dtsi"
+#include "stm32mp15-ddr3-1x4Gb-1066-binG.dtsi"
+#include "stm32mp15xx-osd32.dtsi"
+#include "stm32mp15xxac-pinctrl.dtsi"
+
+/ {
+	model = "Linux Automation MC-1 board";
+	compatible = "lxa,stm32mp157c-mc1", "oct,stm32mp15xx-osd32", "st,stm32mp157";
+
+	aliases {
+		mmc0 = &sdmmc1;
+		mmc1 = &sdmmc2;
+		serial0 = &uart4;
+	};
+
+	chosen {
+		stdout-path = &uart4;
+	};
+
+	led-act {
+		compatible = "gpio-leds";
+
+		led-green {
+			label = "mc1:green:act";
+			gpios = <&gpioa 13 1>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
+
+	reg_3v3: regulator_3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		vin-supply = <&v3v3>;
+	};
+};
+
+&sdmmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc1_b4_pins_a>;
+	bus-width = <4>;
+	cd-gpios = <&gpioh 3 1>;
+	disable-wp;
+	no-1-8-v;
+	st,neg-edge;
+	vmmc-supply = <&reg_3v3>;
+	status = "okay";
+};
+
+&sdmmc1_b4_pins_a {
+	/*
+	 * board lacks external pull-ups on SDMMC lines. Class 10 SD refuses to
+	 * work, thus enable internal pull-ups.
+	 */
+	pins1 {
+		/delete-property/ bias-disable;
+		bias-pull-up;
+	};
+	pins2 {
+		/delete-property/ bias-disable;
+		bias-pull-up;
+	};
+};
+
+&sdmmc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc2_b4_pins_a &mc1_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";
+};
+
+&uart4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart4_pins_a>;
+	status = "okay";
+};
+
+&pinctrl {
+	mc1_sdmmc2_d47_pins_b: mc1-sdmmc2-d47-1 {
+		pins {
+			pinmux = <STM32_PINMUX('A', 8, AF9)>,  /* SDMMC2_D4 */
+				 <STM32_PINMUX('A', 9, AF10)>, /* SDMMC2_D5 */
+				 <STM32_PINMUX('C', 6, AF10)>, /* SDMMC2_D6 */
+				 <STM32_PINMUX('C', 7, AF10)>; /* SDMMC2_D7 */
+			slew-rate = <1>;
+			drive-push-pull;
+			bias-disable;
+		};
+	};
+};
diff --git a/fdts/stm32mp15xx-osd32.dtsi b/fdts/stm32mp15xx-osd32.dtsi
new file mode 100644
index 000000000..76a25613a
--- /dev/null
+++ b/fdts/stm32mp15xx-osd32.dtsi
@@ -0,0 +1,281 @@
+/* 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"
+
+&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;
+			};
+
+			v3v3_hdmi: ldo2 {
+				regulator-name = "v3v3_hdmi";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			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>;
+			};
+
+			vdda: ldo5 {
+				regulator-name = "vdda";
+				regulator-min-microvolt = <2900000>;
+				regulator-max-microvolt = <2900000>;
+				regulator-boot-on;
+			};
+
+			v1v2_hdmi: ldo6 {
+				regulator-name = "v1v2_hdmi";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+			};
+
+			vref_ddr: vref_ddr {
+				regulator-name = "vref_ddr";
+				regulator-always-on;
+				regulator-over-current-protection;
+			};
+
+			bst_out: boost {
+				regulator-name = "bst_out";
+			};
+
+			vbus_otg: pwr_sw1 {
+				regulator-name = "vbus_otg";
+				regulator-active-discharge;
+			};
+
+			vbus_sw: pwr_sw2 {
+				regulator-name = "vbus_sw";
+				regulator-active-discharge;
+			};
+		};
+
+		pmic_watchdog: watchdog {
+			compatible = "st,stpmic1-wdt";
+			status = "disabled";
+		};
+	};
+};
+
+&rng1 {
+	status = "okay";
+};
+
+/* ATF Specific */
+#include <dt-bindings/clock/stm32mp1-clksrc.h>
+
+/ {
+	aliases {
+		gpio0 = &gpioa;
+		gpio1 = &gpiob;
+		gpio2 = &gpioc;
+		gpio3 = &gpiod;
+		gpio4 = &gpioe;
+		gpio5 = &gpiof;
+		gpio6 = &gpiog;
+		gpio7 = &gpioh;
+		gpio8 = &gpioi;
+		gpio25 = &gpioz;
+		i2c3 = &i2c4;
+	};
+};
+
+&bsec {
+	board_id: board_id@ec {
+		reg = <0xec 0x4>;
+		st,non-secure-otp;
+	};
+};
+
+&clk_hse {
+	st,digbypass;
+};
+
+&cpu0{
+	cpu-supply = <&vddcore>;
+};
+
+&cpu1{
+	cpu-supply = <&vddcore>;
+};
+
+&hash1 {
+	status = "okay";
+};
+
+/* CLOCK init */
+&rcc {
+	secure-status = "disabled";
+	st,clksrc = <
+		CLK_MPU_PLL1P
+		CLK_AXI_PLL2P
+		CLK_MCU_PLL3P
+		CLK_PLL12_HSE
+		CLK_PLL3_HSE
+		CLK_PLL4_HSE
+		CLK_RTC_LSE
+		CLK_MCO1_DISABLED
+		CLK_MCO2_DISABLED
+	>;
+
+	st,clkdiv = <
+		1 /*MPU*/
+		0 /*AXI*/
+		0 /*MCU*/
+		1 /*APB1*/
+		1 /*APB2*/
+		1 /*APB3*/
+		1 /*APB4*/
+		2 /*APB5*/
+		23 /*RTC*/
+		0 /*MCO1*/
+		0 /*MCO2*/
+	>;
+
+	st,pkcs = <
+		CLK_CKPER_HSE
+		CLK_FMC_ACLK
+		CLK_QSPI_ACLK
+		CLK_ETH_PLL4P
+		CLK_SDMMC12_PLL4P
+		CLK_DSI_DSIPLL
+		CLK_STGEN_HSE
+		CLK_USBPHY_HSE
+		CLK_SPI2S1_PLL3Q
+		CLK_SPI2S23_PLL3Q
+		CLK_SPI45_HSI
+		CLK_SPI6_HSI
+		CLK_I2C46_HSI
+		CLK_SDMMC3_PLL4P
+		CLK_USBO_USBPHY
+		CLK_ADC_CKPER
+		CLK_CEC_LSE
+		CLK_I2C12_HSI
+		CLK_I2C35_HSI
+		CLK_UART1_HSI
+		CLK_UART24_HSI
+		CLK_UART35_HSI
+		CLK_UART6_HSI
+		CLK_UART78_HSI
+		CLK_SPDIF_PLL4P
+		CLK_FDCAN_PLL4R
+		CLK_SAI1_PLL3Q
+		CLK_SAI2_PLL3Q
+		CLK_SAI3_PLL3Q
+		CLK_SAI4_PLL3Q
+		CLK_RNG1_LSI
+		CLK_RNG2_LSI
+		CLK_LPTIM1_PCLK1
+		CLK_LPTIM23_PCLK3
+		CLK_LPTIM45_LSE
+	>;
+
+	/* VCO = 1300.0 MHz => P = 650 (CPU) */
+	pll1: st,pll@0 {
+		compatible = "st,stm32mp1-pll";
+		reg = <0>;
+		cfg = < 2 80 0 0 0 PQR(1,0,0) >;
+		frac = < 0x800 >;
+	};
+
+	/* VCO = 1066.0 MHz => P = 266 (AXI), Q = 533 (GPU), R = 533 (DDR) */
+	pll2: st,pll@1 {
+		compatible = "st,stm32mp1-pll";
+		reg = <1>;
+		cfg = <2 65 1 0 0 PQR(1,1,1)>;
+		frac = <0x1400>;
+	};
+
+	/* VCO = 417.8 MHz => P = 209, Q = 24, R = 11 */
+	pll3: st,pll@2 {
+		compatible = "st,stm32mp1-pll";
+		reg = <2>;
+		cfg = <1 33 1 16 36 PQR(1,1,1)>;
+		frac = <0x1a04>;
+	};
+
+	/* VCO = 594.0 MHz => P = 99, Q = 74, R = 74 */
+	pll4: st,pll@3 {
+		compatible = "st,stm32mp1-pll";
+		reg = <3>;
+		cfg = <3 98 5 7 7 PQR(1,1,1)>;
+	};
+};