arm: Add LibreTech CC support based on Meson GXL family

This adds platform code for the Libre Computer CC "Le Potato" board based on a
Meson GXL (S905X) SoC with the Meson GXL configuration.

This initial submission supports UART, MMC/SDCard and Ethernet with the
Internal RMII PHY.

The meson-gxl-s905x-libretech-cc.dts is synchronised from the linux 4.13
stable tree as of 4.13.8.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

3 files changed, 182 insertions, 1 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 1518616..6c49a10 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -56,7 +56,8 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rv1108-evb.dtb
 dtb-$(CONFIG_ARCH_MESON) += \
 	meson-gxbb-odroidc2.dtb \
-	meson-gxl-s905x-p212.dtb
+	meson-gxl-s905x-p212.dtb \
+	meson-gxl-s905x-libretech-cc.dtb
 dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \
 	tegra20-medcom-wide.dtb \
 	tegra20-paz00.dtb \
diff --git a/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts b/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts
new file mode 100644
index 0000000..266fbcf
--- /dev/null
+++ b/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ * Author: Jerome Brunet <jbrunet@baylibre.com>
+ *
+ * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/input/input.h>
+
+#include "meson-gxl-s905x.dtsi"
+
+/ {
+	compatible = "libretech,cc", "amlogic,s905x", "amlogic,meson-gxl";
+	model = "Libre Technology CC";
+
+	aliases {
+		serial0 = &uart_AO;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	cvbs-connector {
+		compatible = "composite-video-connector";
+
+		port {
+			cvbs_connector_in: endpoint {
+				remote-endpoint = <&cvbs_vdac_out>;
+			};
+		};
+	};
+
+	emmc_pwrseq: emmc-pwrseq {
+		compatible = "mmc-pwrseq-emmc";
+		reset-gpios = <&gpio BOOT_9 GPIO_ACTIVE_LOW>;
+	};
+
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&hdmi_tx_tmds_out>;
+			};
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		system {
+			label = "librecomputer:system-status";
+			gpios = <&gpio GPIODV_24 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+			panic-indicator;
+		};
+
+		blue {
+			label = "librecomputer:blue";
+			gpios = <&gpio_ao GPIOAO_2 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x80000000>;
+	};
+
+	vcc_3v3: regulator-vcc_3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	vcc_card: regulator-vcc-card {
+		compatible = "regulator-gpio";
+
+		regulator-name = "VCC_CARD";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpios = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_HIGH>;
+		gpios-states = <0>;
+
+		states = <3300000 0>,
+			 <1800000 1>;
+	};
+
+	vddio_boot: regulator-vddio_boot {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_BOOT";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+};
+
+&cvbs_vdac_port {
+	cvbs_vdac_out: endpoint {
+		remote-endpoint = <&cvbs_connector_in>;
+	};
+};
+
+&ethmac {
+	status = "okay";
+};
+
+&ir {
+	status = "okay";
+	pinctrl-0 = <&remote_input_ao_pins>;
+	pinctrl-names = "default";
+};
+
+&hdmi_tx {
+	status = "okay";
+	pinctrl-0 = <&hdmi_hpd_pins>, <&hdmi_i2c_pins>;
+	pinctrl-names = "default";
+};
+
+&hdmi_tx_tmds_port {
+	hdmi_tx_tmds_out: endpoint {
+		remote-endpoint = <&hdmi_connector_in>;
+	};
+};
+
+/* SD card */
+&sd_emmc_b {
+	status = "okay";
+	pinctrl-0 = <&sdcard_pins>;
+	pinctrl-names = "default";
+
+	bus-width = <4>;
+	cap-sd-highspeed;
+	max-frequency = <100000000>;
+	disable-wp;
+
+	cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_HIGH>;
+	cd-inverted;
+
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vcc_card>;
+};
+
+/* eMMC */
+&sd_emmc_c {
+	status = "okay";
+	pinctrl-0 = <&emmc_pins>;
+	pinctrl-names = "default";
+
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	max-frequency = <50000000>;
+	non-removable;
+	disable-wp;
+
+	mmc-pwrseq = <&emmc_pwrseq>;
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vddio_boot>;
+};
+
+&uart_AO {
+	status = "okay";
+	pinctrl-0 = <&uart_ao_a_pins>;
+	pinctrl-names = "default";
+};
diff --git a/arch/arm/mach-meson/Kconfig b/arch/arm/mach-meson/Kconfig
index d4bd230..ca08dc3 100644
--- a/arch/arm/mach-meson/Kconfig
+++ b/arch/arm/mach-meson/Kconfig
@@ -38,6 +38,13 @@ config TARGET_P212
 	  with 2 GiB of RAM, Ethernet, HDMI, 2 USB, micro-SD slot,
 	  eMMC, IR receiver, CVBS+Audio jack and a SDIO WiFi module.
 
+config TARGET_LIBRETECH_CC
+	bool "LIBRETECH-CC"
+	help
+	  LibreTech CC is a single board computer based on Meson GXL
+	  with 2 GiB of RAM, Ethernet, HDMI, 4 USB, micro-SD slot,
+	  eMMC, IR receiver and a 40-pin GPIO header.
+
 endif
 
 config SYS_SOC
@@ -50,4 +57,6 @@ source "board/amlogic/odroid-c2/Kconfig"
 
 source "board/amlogic/p212/Kconfig"
 
+source "board/amlogic/libretech-cc/Kconfig"
+
 endif