[PATCH 4/5] sun7i: add support for Micronova srl s027_3 board

[Giulio Benetti <giulio.benetti@benettiengineering.com>]

From: Giulio Benetti <giulio.benetti@micronovasrl.com>

Add support for Micronova srl s027_3 board by adding new vendor/board
folders and using in local Makefile the already present
board/sunxi/Makefile. The reason is that s027_3 needs a pin to be asserted
to enable lcd before setting controller up and sunxi board doesn't provide
a way to do this customization.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
---
 arch/arm/dts/Makefile                 |   1 +
 arch/arm/dts/sun7i-a20-s027_3.dts     | 272 ++++++++++++++++++++++++++
 board/micronovasrl/s027_3/MAINTAINERS |   5 +
 board/micronovasrl/s027_3/Makefile    |   8 +
 board/micronovasrl/s027_3/s027_3.c    |  29 +++
 configs/micronovasrl-s027_3_defconfig |  37 ++++
 6 files changed, 352 insertions(+)
 create mode 100644 arch/arm/dts/sun7i-a20-s027_3.dts
 create mode 100644 board/micronovasrl/s027_3/MAINTAINERS
 create mode 100644 board/micronovasrl/s027_3/Makefile
 create mode 100644 board/micronovasrl/s027_3/s027_3.c
 create mode 100644 configs/micronovasrl-s027_3_defconfig

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 33e483f4fb..658a8c95a1 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -543,6 +543,7 @@ dtb-$(CONFIG_MACH_SUN7I) += \
 	sun7i-a20-pcduino3.dtb \
 	sun7i-a20-pcduino3-nano.dtb \
 	sun7i-a20-primo73.dtb \
+	sun7i-a20-s027_3.dtb \
 	sun7i-a20-wexler-tab7200.dtb \
 	sun7i-a20-wits-pro-a20-dkt.dtb \
 	sun7i-a20-yones-toptech-bd1078.dtb
diff --git a/arch/arm/dts/sun7i-a20-s027_3.dts b/arch/arm/dts/sun7i-a20-s027_3.dts
new file mode 100644
index 0000000000..4642c304a8
--- /dev/null
+++ b/arch/arm/dts/sun7i-a20-s027_3.dts
@@ -0,0 +1,272 @@
+/*
+ * Copyright 2021 - Giulio Benetti <giulio.benetti@micronovasrl.com>
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This file is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+#include "sun7i-a20.dtsi"
+#include "sunxi-common-regulators.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+
+/ {
+	model = "Micronova srl S027_3";
+	compatible = "micronova,a20-s027_3", "allwinner,sun7i-a20";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		power-supply = <&reg_axp_ipsout>;
+		pwms = <&pwm 0 50000 0>;
+		brightness-levels = <0 73 76 79 82 85 88 91 94 97 100>;
+		default-brightness-level = <8>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	reg_axp_ipsout: axp-ipsout {
+		compatible = "regulator-fixed";
+		regulator-name = "axp-ipsout";
+		regulator-min-microvolt = <4200000>;
+		regulator-max-microvolt = <4200000>;
+		regulator-always-on;
+		vin-supply = <&reg_vcc5v0>;
+	};
+
+	reg_vusb: vusb {
+		compatible = "regulator-fixed";
+		regulator-name = "vusb";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&pio 1 13 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		status = "okay";
+		vin-supply = <&reg_axp_ipsout>;
+	};
+};
+
+&codec {
+	status = "okay";
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	status = "okay";
+
+	axp209: pmic at 34 {
+		compatible = "x-powers,axp209";
+		reg = <0x34>;
+		interrupt-parent = <&nmi_intc>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+	};
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	status = "okay";
+
+	ext_rtc: ext_rtc at 68 {
+		compatible = "st,m41t11";
+		reg = <0x68>;
+	};
+};
+
+&lradc {
+	vref-supply = <&reg_vcc3v0>;
+	status = "okay";
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins>;
+	vmmc-supply = <&reg_vcc3v3>;
+	bus-width = <4>;
+	cd-gpios = <&pio 7 1 GPIO_ACTIVE_HIGH>; /* PH1 */
+	cd-inverted;
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
+&otg_sram {
+	status = "okay";
+};
+
+&pio {
+	vcc-pa-supply = <&reg_vcc3v3>;
+	vcc-pc-supply = <&reg_vcc3v3>;
+	vcc-pe-supply = <&reg_ldo3>;
+	vcc-pf-supply = <&reg_vcc3v3>;
+	vcc-pg-supply = <&reg_ldo4>;
+};
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_pin>, <&pwm1_pin>;
+	status = "okay";
+};
+
+#include "axp209.dtsi"
+
+&ac_power_supply {
+	status = "okay";
+};
+
+&reg_dcdc2 {
+	regulator-always-on;
+	regulator-min-microvolt = <1000000>;
+	regulator-max-microvolt = <1400000>;
+	regulator-name = "cpu_vdd";
+};
+
+&reg_dcdc3 {
+	regulator-always-on;
+	regulator-min-microvolt = <1000000>;
+	regulator-max-microvolt = <1400000>;
+	regulator-name = "int_vdd";
+};
+
+&reg_ldo1 {
+	regulator-always-on;
+	regulator-name = "vdd_rtc";
+};
+
+&reg_ldo2 {
+	regulator-always-on;
+	regulator-min-microvolt = <3000000>;
+	regulator-max-microvolt = <3000000>;
+	regulator-name = "+3v0";
+};
+
+&reg_ldo3 {
+	regulator-always-on;
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+	regulator-name = "ldo3_2v8";
+	regulator-soft-start;
+	regulator-ramp-delay = <1600>;
+};
+
+&reg_ldo4 {
+	regulator-always-on;
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+	regulator-name = "ldo4_2v8";
+};
+
+&reg_usb0_vbus {
+	vin-supply = <&reg_vusb>;
+	gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
+	status = "okay";
+};
+
+&reg_usb1_vbus {
+	vin-supply = <&reg_vusb>;
+	gpio = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
+	status = "okay";
+};
+
+&reg_usb2_vbus {
+	vin-supply = <&reg_vusb>;
+	gpio = <&pio 7 11 GPIO_ACTIVE_LOW>; /* PH11 */
+	enable-active-low;
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pb_pins>;
+	status = "okay";
+};
+
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pa_pins>;
+	status = "okay";
+	linux,rs485-enabled-at-boot-time;
+	rts-gpios = <&pio 0 12 GPIO_ACTIVE_HIGH>; /* PA12 */
+};
+
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2_pa_pins>;
+	status = "okay";
+	linux,rs485-enabled-at-boot-time;
+	rts-gpios = <&pio 0 0 GPIO_ACTIVE_HIGH>; /* PA0 */
+};
+
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usbphy {
+	pinctrl-names = "default";
+	usb0_vbus-supply = <&reg_usb0_vbus>;
+	usb1_vbus-supply = <&reg_usb1_vbus>;
+	usb2_vbus-supply = <&reg_usb2_vbus>;
+	status = "okay";
+};
diff --git a/board/micronovasrl/s027_3/MAINTAINERS b/board/micronovasrl/s027_3/MAINTAINERS
new file mode 100644
index 0000000000..1ecff4e357
--- /dev/null
+++ b/board/micronovasrl/s027_3/MAINTAINERS
@@ -0,0 +1,5 @@
+MICRONOVA S.R.L. S027_3
+M:	Giulio Benetti <giulio.benetti@micronovasrl.com>
+S:	Maintained
+F:	board/micronovasrl/s027_3/
+F:	configs/micronovasrl_s027_3_defconfig
diff --git a/board/micronovasrl/s027_3/Makefile b/board/micronovasrl/s027_3/Makefile
new file mode 100644
index 0000000000..f7452abfc7
--- /dev/null
+++ b/board/micronovasrl/s027_3/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2021 Giulio Benetti <giulio.benetti@micronovasrl.com>
+
+obj-y += ../../sunxi/board.o
+# sun7i is compatible with sun5i
+obj-y += ../../sunxi/dram_sun5i_auto.o
+obj-y += s027_3.o
diff --git a/board/micronovasrl/s027_3/s027_3.c b/board/micronovasrl/s027_3/s027_3.c
new file mode 100644
index 0000000000..69e1baecbf
--- /dev/null
+++ b/board/micronovasrl/s027_3/s027_3.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ *
+ * Some specific init for s027_3 board.
+ */
+
+#include <asm/gpio.h>
+
+int board_early_init_r(void)
+{
+	int lcd_pwr_gpio;
+	int ret;
+
+	lcd_pwr_gpio = sunxi_name_to_gpio("PH18");
+	if (lcd_pwr_gpio < 0)
+		return lcd_pwr_gpio;
+
+	ret = gpio_request(lcd_pwr_gpio, "lcd-pwr");
+	if (ret)
+		return ret;
+
+	/* Enable LCD_PWR, it's active low */
+	gpio_direction_output(lcd_pwr_gpio, 1);
+	gpio_set_value(lcd_pwr_gpio, 0);
+
+	return 0;
+}
diff --git a/configs/micronovasrl-s027_3_defconfig b/configs/micronovasrl-s027_3_defconfig
new file mode 100644
index 0000000000..068af94bd7
--- /dev/null
+++ b/configs/micronovasrl-s027_3_defconfig
@@ -0,0 +1,37 @@
+CONFIG_ARM=y
+CONFIG_SYS_VENDOR="micronovasrl"
+CONFIG_SYS_BOARD="s027_3"
+CONFIG_ARCH_SUNXI=y
+CONFIG_SPL=y
+CONFIG_IDENT_STRING=" Micronova srl S027_3"
+CONFIG_MACH_SUN7I=y
+CONFIG_DRAM_CLK=384
+CONFIG_MMC0_CD_PIN="PH1"
+CONFIG_USB0_VBUS_PIN="PH4"
+CONFIG_USB1_VBUS_PIN="PH5"
+CONFIG_USB2_VBUS_PIN="PH11"
+# CONFIG_VIDEO_HDMI is not set
+CONFIG_VIDEO_LCD_MODE="video"
+CONFIG_VIDEO_LCD_POWER="PH0"
+CONFIG_VIDEO_LCD_BL_PWM="PB2"
+# CONFIG_VIDEO_LCD_BL_PWM_ACTIVE_LOW is not set
+CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-s027_3"
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_BOOTDELAY=1
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_BOARD_EARLY_INIT_R=y
+# CONFIG_BOARD_LATE_INIT is not set
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x50
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET=0x0
+CONFIG_SPL_I2C_SUPPORT=y
+CONFIG_CMD_BMP=y
+# CONFIG_NETDEVICES is not set
+CONFIG_AXP_ALDO3_VOLT=2800
+CONFIG_AXP_ALDO4_VOLT=2800
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_GADGET is not set
+CONFIG_SPLASH_SCREEN=y
+CONFIG_SPLASHIMAGE_GUARD=y
+CONFIG_SPLASH_SCREEN_ALIGN=y
+CONFIG_SPLASH_SOURCE=y
-- 
2.25.1