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>

diff --git a/fdts/stm32mp157c-lxa-mc1.dts b/fdts/stm32mp157c-lxa-mc1.dts
new file mode 100644 (file)
index 0000000..7b8e481
--- /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 (file)
index 0000000..76a2561
--- /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)>;
+       };
+};