ARM: dts: sun8i: h2+: add support for Banana Pi M2 Zero board

Banana Pi M2 Zero board is a H2+-based board by Sinovoip, with a form
factor and GPIO holes similar to Raspberry Pi Zero.

It features:
- Allwinner H2+ SoC
- Single-chip (16-bit) 512MiB DDR3 DRAM
- Ampak AP6212 Wi-Fi/Bluetooth module
- MicroSD slot
- Two MicroUSB Type-B ports (one can only be used to power the board and
  the other features OTG functionality)
- Two keys, a reset and a GPIO-connected key.
- HDMI Type-C (miniHDMI) connector connected to the HDMI part of H2+.
- CSI connector to connect the camera sensor provided by Sinovoip.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

2 files changed, 126 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index ade7a38543dc..d5a17e6e8b0f 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -974,6 +974,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
         sun8i-a83t-cubietruck-plus.dtb \
         sun8i-a83t-tbs-a711.dtb \
         sun8i-h2-plus-orangepi-r1.dtb \
+        sun8i-h2-plus-bananapi-m2-zero.dtb \
         sun8i-h2-plus-orangepi-zero.dtb \
         sun8i-h3-bananapi-m2-plus.dtb \
         sun8i-h3-beelink-x2.dtb \
diff --git a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
new file mode 100644
index 000000000000..1cdbd9a3ef57
--- /dev/null
+++ b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2017 Icenowy Zheng <icenowy@aosc.io>
+ *
+ * Based on sun8i-h3-bananapi-m2-plus.dts, which is:
+ *   Copyright (C) 2016 Chen-Yu Tsai <wens@csie.org>
+ */
+
+/dts-v1/;
+#include "sun8i-h3.dtsi"
+#include "sunxi-common-regulators.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+        model = "Banana Pi BPI-M2-Zero";
+        compatible = "sinovoip,bpi-m2-zero", "allwinner,sun8i-h2-plus";
+
+        aliases {
+                serial0 = &uart0;
+                serial1 = &uart1;
+        };
+
+        chosen {
+                stdout-path = "serial0:115200n8";
+        };
+
+        leds {
+                compatible = "gpio-leds";
+                pinctrl-names = "default";
+
+                pwr_led {
+                        label = "bananapi-m2-zero:red:pwr";
+                        gpios = <&r_pio 0 10 GPIO_ACTIVE_HIGH>; /* PL10 */
+                        default-state = "on";
+                };
+        };
+
+        gpio_keys {
+                compatible = "gpio-keys";
+                pinctrl-names = "default";
+
+                sw4 {
+                        label = "power";
+                        linux,code = <BTN_0>;
+                        gpios = <&r_pio 0 3 GPIO_ACTIVE_LOW>;
+                };
+        };
+
+        wifi_pwrseq: wifi_pwrseq {
+                compatible = "mmc-pwrseq-simple";
+                pinctrl-names = "default";
+                reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>; /* PL7 */
+        };
+};
+
+&ehci0 {
+        status = "okay";
+};
+
+&mmc0 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&mmc0_pins_a>;
+        vmmc-supply = <&reg_vcc3v3>;
+        bus-width = <4>;
+        /*
+         * On the production batch of this board the card detect GPIO is
+         * high active (card inserted), although on the early samples it's
+         * low active.
+         */
+        cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>; /* PF6 */
+        status = "okay";
+};
+
+&mmc1 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&mmc1_pins_a>;
+        vmmc-supply = <&reg_vcc3v3>;
+        vqmmc-supply = <&reg_vcc3v3>;
+        mmc-pwrseq = <&wifi_pwrseq>;
+        bus-width = <4>;
+        non-removable;
+        status = "okay";
+
+        brcmf: wifi@1 {
+                reg = <1>;
+                compatible = "brcm,bcm4329-fmac";
+                interrupt-parent = <&pio>;
+                interrupts = <6 10 IRQ_TYPE_LEVEL_LOW>; /* PG10 / EINT10 */
+                interrupt-names = "host-wake";
+        };
+};
+
+&ohci0 {
+        status = "okay";
+};
+
+&uart0 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&uart0_pins_a>;
+        status = "okay";
+};
+
+&uart1 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
+        status = "okay";
+};
+
+&usb_otg {
+        dr_mode = "otg";
+        status = "okay";
+};
+
+&usbphy {
+        usb0_id_det-gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
+        /*
+         * There're two micro-USB connectors, one is power-only and another is
+         * OTG. The Vbus of these two connectors are connected together, so
+         * the external USB device will be powered just by the power input
+         * from the power-only USB port.
+         */
+        status = "okay";
+};