The Endless Mini (EC-100) is a grapefruit-sized computer based on the
Amlogic Meson8b (S805) SoC which comes in two variants.
Both variants have in common:
- Amlogic Meson8b (S805) SoC
- two USB 2.0 ports on the rear, one one the front (connected to the SoC
through an internal hub)
- 3.5mm Stereo out and MIC combo port
- HDMI and CVBS output
- 5V power supply (rated at 3A / 15W)
- an internal embedded micro-controller (called "EC") which implements a
"breathing" effect for the LED and allows shutting down (powering off)
the whole device
- 10/100 Mbit/s Ethernet using an IC Plus IP101A/G PHY (note: the website
incorrectly lists a Gigabit Ethernet port)
- the CPU voltage is regulated using a PWM regulator. The GPL sources of
the EC-100 are using a PWM value of 0x1c0000 for 0.86V and a PWM value
of 0x00001c for 1.14V. When using the XTAL (24MHz) as input this
translates into a PWM period of 1148ns with 0.86V using a duty cycle of
100% and 1.14V using a duty cycle of 0%.
The main differences are:
- the main indicator for the variant is the RAM size: the "cheaper"
variant has 1 GB of RAM, while the more expensive one comes with 2GB
- the storage size differs: 24 GB vs 32 GB
- the "1 GB RAM" variant has Ethernet connectivity only, while the "2 GB"
variant has a Realtek RTL8723BS SDIO chip which adds 802.11b/g/n wifi
and Bluetooth 4.0 support
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
---
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/meson8b-ec100.dts | 248 ++++++++++++++++++++++++++++
2 files changed, 249 insertions(+)
create mode 100644 arch/arm/boot/dts/meson8b-ec100.dts
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index b5bd3de87c33..856ebc036cc4 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -321,6 +321,7 @@ dtb-$(CONFIG_MACH_MESON6) += \
meson6-atv1200.dtb
dtb-$(CONFIG_MACH_MESON8) += \
meson8-minix-neo-x8.dtb \
+ meson8b-ec100.dtb \
meson8b-mxq.dtb \
meson8b-odroidc1.dtb \
meson8m2-mxiii-plus.dtb
diff --git a/arch/arm/boot/dts/meson8b-ec100.dts b/arch/arm/boot/dts/meson8b-ec100.dts
new file mode 100644
index 000000000000..0872f6e3abf5
--- /dev/null
+++ b/arch/arm/boot/dts/meson8b-ec100.dts
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>.
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "meson8b.dtsi"
+
+/ {
+ model = "Endless Computers Endless Mini";
+ compatible = "endless,ec100", "amlogic,meson8b";
+
+ aliases {
+ serial0 = &uart_AO;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory {
+ reg = <0x40000000 0x40000000>;
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys-polled";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ poll-interval = <100>;
+
+ pal-switch {
+ label = "pal";
+ linux,input-type = <EV_SW>;
+ linux,code = <KEY_SWITCHVIDEOMODE>;
+ gpios = <&gpio GPIOH_7 GPIO_ACTIVE_LOW>;
+ };
+
+ ntsc-switch {
+ label = "ntsc";
+ linux,input-type = <EV_SW>;
+ linux,code = <KEY_SWITCHVIDEOMODE>;
+ gpios = <&gpio GPIOH_8 GPIO_ACTIVE_HIGH>;
+ };
+
+ power-button {
+ label = "power";
+ linux,code = <KEY_POWER>;
+ gpios = <&gpio GPIOH_9 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ gpio-poweroff {
+ compatible = "gpio-poweroff";
+ /*
+ * shutdown is managed by the EC (embedded micro-controller)
+ * which is configured through GPIOAO_2 (poweroff GPIO) and
+ * GPIOAO_7 (power LED, which has to go LOW as well).
+ */
+ gpios = <&gpio_ao GPIOAO_2 GPIO_ACTIVE_LOW>;
+ timeout-ms = <20000>;
+ };
+
+ leds {
+ compatible = "gpio-leds";
+
+ power {
+ label = "ec100:red:power";
+ /*
+ * Needs to go LOW (together with the poweroff GPIO)
+ * during shutdown to allow the EC (embedded
+ * micro-controller) to shutdown the system. Setting
+ * the output to LOW signals the EC to start a
+ * "breathing"/pulsing effect until the power is fully
+ * turned off.
+ */
+ gpios = <&gpio_ao GPIOAO_7 GPIO_ACTIVE_HIGH>;
+ default-state = "on";
+ };
+ };
+
+ usb_vbus: regulator-usb-vbus {
+ compatible = "regulator-fixed";
+
+ regulator-name = "USB_VBUS";
+
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+
+ gpio = <&gpio_ao GPIOAO_5 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ };
+
+ vcc_5v: regulator-vcc5v {
+ compatible = "regulator-fixed";
+
+ regulator-name = "VCC5V";
+
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+
+ gpio = <&gpio GPIODV_29 GPIO_ACTIVE_LOW>;
+
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ vcck: regulator-vcck {
+ compatible = "pwm-regulator";
+
+ regulator-name = "VCCK";
+ regulator-min-microvolt = <860000>;
+ regulator-max-microvolt = <1140000>;
+
+ pwms = <&pwm_cd 0 1148 0>;
+ pwm-dutycycle-range = <100 0>;
+
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ vcc_1v8: regulator-vcc1v8 {
+ compatible = "regulator-fixed";
+
+ regulator-name = "VCC1V8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ vcc_3v3: regulator-vcc3v3 {
+ compatible = "regulator-fixed";
+
+ regulator-name = "VCC3V3";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+};
+
+&cpu0 {
+ cpu-supply = <&vcck>;
+};
+
+ðmac {
+ status = "okay";
+
+ pinctrl-0 = <ð_rmii_pins>;
+ pinctrl-names = "default";
+
+ phy-handle = <ð_phy0>;
+ phy-mode = "rmii";
+
+ snps,reset-gpio = <&gpio GPIOH_4 0>;
+ snps,reset-delays-us = <0 10000 1000000>;
+ snps,reset-active-low;
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eth_phy0: ethernet-phy@0 {
+ /* IC Plus IP101A/G (0x02430c54) */
+ reg = <0>;
+ };
+ };
+};
+
+&i2c_A {
+ status = "okay";
+ pinctrl-0 = <&i2c_a_pins>;
+ pinctrl-names = "default";
+
+ rt5640: codec@1c {
+ compatible = "realtek,rt5640";
+ reg = <0x1c>;
+ interrupt-parent = <&gpio_intc>;
+ interrupts = <13 IRQ_TYPE_EDGE_BOTH>; /* GPIOAO_13 */
+ realtek,in1-differential;
+ };
+};
+
+&saradc {
+ status = "okay";
+ vref-supply = <&vcc_1v8>;
+};
+
+&sdio {
+ status = "okay";
+
+ pinctrl-0 = <&sd_b_pins>;
+ pinctrl-names = "default";
+
+ /* SD card */
+ sd_card_slot: slot@1 {
+ compatible = "mmc-slot";
+ reg = <1>;
+ status = "okay";
+
+ bus-width = <4>;
+ no-sdio;
+ cap-mmc-highspeed;
+ cap-sd-highspeed;
+ disable-wp;
+
+ cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_HIGH>;
+ cd-inverted;
+
+ vmmc-supply = <&vcc_3v3>;
+ };
+};
+
+&pwm_cd {
+ status = "okay";
+ pinctrl-0 = <&pwm_c1_pins>;
+ pinctrl-names = "default";
+ clocks = <&clkc CLKID_XTAL>;
+ clock-names = "clkin0";
+};
+
+/* exposed through the pin headers labeled "URDUG1" on the top of the PCB */
+&uart_AO {
+ status = "okay";
+ pinctrl-0 = <&uart_ao_a_pins>;
+ pinctrl-names = "default";
+};
+
+/*
+ * connected to the Bluetooth part of the RTL8723BS SDIO wifi / Bluetooth
+ * combo chip. This is only available on the variant with 2GB RAM.
+ */
+&uart_B {
+ status = "okay";
+ pinctrl-0 = <&uart_b0_pins>, <&uart_b0_cts_rts_pins>;
+ pinctrl-names = "default";
+ uart-has-rtscts;
+};
+
+&usb1 {
+ status = "okay";
+ vbus-supply = <&usb_vbus>;
+};
+
+&usb1_phy {
+ status = "okay";
+};
--
2.19.0
