MIPS: ingenic: Add support for the RS90 board

The RS-90, better known as RetroMini, is a small and pocketable handheld
gaming console from YLMChina. It has little more than a JZ4725B SoC, a
NAND, a screen, some buttons and a speaker.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/boot/dts/ingenic/Makefile b/arch/mips/boot/dts/ingenic/Makefile
index e165429..f23ff51 100644 (file)
--- a/arch/mips/boot/dts/ingenic/Makefile
+++ b/arch/mips/boot/dts/ingenic/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_JZ4740_QI_LB60)   += qi_lb60.dtb
+dtb-$(CONFIG_JZ4740_RS90)      += rs90.dtb
 dtb-$(CONFIG_JZ4770_GCW0)      += gcw0.dtb
 dtb-$(CONFIG_JZ4780_CI20)      += ci20.dtb
 dtb-$(CONFIG_X1000_CU1000_NEO) += cu1000-neo.dtb

diff --git a/arch/mips/boot/dts/ingenic/rs90.dts b/arch/mips/boot/dts/ingenic/rs90.dts
new file mode 100644 (file)
index 0000000..246f97e
--- /dev/null
+++ b/arch/mips/boot/dts/ingenic/rs90.dts
@@ -0,0 +1,311 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "jz4725b.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/iio/adc/ingenic,adc.h>
+#include <dt-bindings/input/linux-event-codes.h>
+
+/ {
+       compatible = "ylm,rs90", "ingenic,jz4725b";
+       model = "RS-90";
+
+       memory {
+               device_type = "memory";
+               reg = <0x0 0x2000000>;
+       };
+
+       vcc: regulator {
+               compatible = "regulator-fixed";
+
+               regulator-name = "vcc";
+               regulaor-min-microvolt = <3300000>;
+               regulaor-max-microvolt = <3300000>;
+               regulator-always-on;
+       };
+
+       backlight: backlight {
+               compatible = "pwm-backlight";
+               pwms = <&pwm 3 40000 0>;
+
+               brightness-levels = <0 16 32 48 64 80 112 144 192 255>;
+               default-brightness-level = <8>;
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&pins_pwm3>;
+
+               power-supply = <&vcc>;
+       };
+
+       keys@0 {
+               compatible = "gpio-keys";
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               key@0 {
+                       label = "D-pad up";
+                       linux,code = <KEY_UP>;
+                       gpios = <&gpc 10 GPIO_ACTIVE_LOW>;
+               };
+
+               key@1 {
+                       label = "D-pad down";
+                       linux,code = <KEY_DOWN>;
+                       gpios = <&gpc 11 GPIO_ACTIVE_LOW>;
+               };
+
+               key@2 {
+                       label = "D-pad left";
+                       linux,code = <KEY_LEFT>;
+                       gpios = <&gpb 31 GPIO_ACTIVE_LOW>;
+               };
+
+               key@3 {
+                       label = "D-pad right";
+                       linux,code = <KEY_RIGHT>;
+                       gpios = <&gpd 21 GPIO_ACTIVE_LOW>;
+               };
+
+               key@4 {
+                       label = "Button A";
+                       linux,code = <KEY_LEFTCTRL>;
+                       gpios = <&gpc 31 GPIO_ACTIVE_LOW>;
+               };
+
+               key@5 {
+                       label = "Button B";
+                       linux,code = <KEY_LEFTALT>;
+                       gpios = <&gpc 30 GPIO_ACTIVE_LOW>;
+               };
+
+               key@6 {
+                       label = "Right shoulder button";
+                       linux,code = <KEY_BACKSPACE>;
+                       gpios = <&gpc 12 GPIO_ACTIVE_LOW>;
+                       debounce-interval = <10>;
+               };
+
+               key@7 {
+                       label = "Start button";
+                       linux,code = <KEY_ENTER>;
+                       gpios = <&gpd 17 GPIO_ACTIVE_LOW>;
+               };
+       };
+
+       keys@1 {
+               compatible = "adc-keys";
+               io-channels = <&adc INGENIC_ADC_AUX>;
+               io-channel-names = "buttons";
+               keyup-threshold-microvolt = <1400000>;
+               poll-interval = <30>;
+
+               key@0 {
+                       label = "Left shoulder button";
+                       linux,code = <KEY_TAB>;
+                       press-threshold-microvolt = <800000>;
+               };
+
+               key@1 {
+                       label = "Select button";
+                       linux,code = <KEY_ESC>;
+                       press-threshold-microvolt = <1100000>;
+               };
+       };
+
+       amp: analog-amplifier {
+               compatible = "simple-audio-amplifier";
+               enable-gpios = <&gpc 15 GPIO_ACTIVE_HIGH>;
+
+               VCC-supply = <&vcc>;
+       };
+
+       sound {
+               compatible = "simple-audio-card";
+
+               simple-audio-card,name = "rs90-audio";
+               simple-audio-card,format = "i2s";
+
+               simple-audio-card,widgets =
+                       "Speaker", "Speaker",
+                       "Headphone", "Headphones";
+               simple-audio-card,routing =
+                       "INL", "LHPOUT",
+                       "INR", "RHPOUT",
+                       "Headphones", "LHPOUT",
+                       "Headphones", "RHPOUT",
+                       "Speaker", "OUTL",
+                       "Speaker", "OUTR";
+               simple-audio-card,pin-switches = "Speaker";
+
+               simple-audio-card,hp-det-gpio = <&gpd 16 GPIO_ACTIVE_LOW>;
+               simple-audio-card,aux-devs = <&amp>;
+
+               simple-audio-card,bitclock-master = <&dai_codec>;
+               simple-audio-card,frame-master = <&dai_codec>;
+
+               dai_cpu: simple-audio-card,cpu {
+                       sound-dai = <&aic>;
+               };
+
+               dai_codec: simple-audio-card,codec {
+                       sound-dai = <&codec>;
+               };
+
+       };
+
+       usb_phy: usb-phy {
+               compatible = "usb-nop-xceiv";
+               #phy-cells = <0>;
+
+               clocks = <&cgu JZ4725B_CLK_UDC_PHY>;
+               clock-names = "main_clk";
+               vcc-supply = <&vcc>;
+       };
+
+       panel {
+               compatible = "sharp,ls020b1dd01d";
+
+               backlight = <&backlight>;
+               power-supply = <&vcc>;
+
+               port {
+                       panel_input: endpoint {
+                               remote-endpoint = <&panel_output>;
+                       };
+               };
+       };
+};
+
+&ext {
+       clock-frequency = <12000000>;
+};
+
+&rtc_dev {
+       system-power-controller;
+};
+
+&udc {
+       phys = <&usb_phy>;
+};
+
+&pinctrl {
+       pins_mmc1: mmc1 {
+               function = "mmc1";
+               groups = "mmc1-1bit";
+       };
+
+       pins_nemc: nemc {
+               function = "nand";
+               groups = "nand-cs1", "nand-cle-ale", "nand-fre-fwe";
+       };
+
+       pins_pwm3: pwm3 {
+               function = "pwm3";
+               groups = "pwm3";
+               bias-disable;
+       };
+
+       pins_lcd: lcd {
+               function = "lcd";
+               groups = "lcd-8bit", "lcd-16bit", "lcd-special";
+       };
+};
+
+&mmc0 {
+       status = "disabled";
+};
+
+&mmc1 {
+       bus-width = <1>;
+       max-frequency = <48000000>;
+
+       pinctrl-names = "default";
+       pinctrl-0 = <&pins_mmc1>;
+
+       cd-gpios = <&gpc 20 GPIO_ACTIVE_LOW>;
+};
+
+&uart {
+       /*
+        * The pins for RX/TX are used for the right shoulder button and
+        * backlight PWM.
+        */
+       status = "disabled";
+};
+
+&nemc {
+       nandc: nand-controller@1 {
+               compatible = "ingenic,jz4725b-nand";
+               reg = <1 0 0x4000000>;
+
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               ecc-engine = <&bch>;
+
+               ingenic,nemc-tAS = <10>;
+               ingenic,nemc-tAH = <5>;
+               ingenic,nemc-tBP = <10>;
+               ingenic,nemc-tAW = <15>;
+               ingenic,nemc-tSTRV = <100>;
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&pins_nemc>;
+
+               rb-gpios = <&gpc 27 GPIO_ACTIVE_HIGH>;
+
+               nand@1 {
+                       reg = <1>;
+
+                       nand-ecc-step-size = <512>;
+                       nand-ecc-strength = <8>;
+                       nand-ecc-mode = "hw";
+                       nand-is-boot-medium;
+                       nand-on-flash-bbt;
+
+                       partitions {
+                               compatible = "fixed-partitions";
+                               #address-cells = <1>;
+                               #size-cells = <1>;
+
+                               partition@0 {
+                                       label = "bootloader";
+                                       reg = <0x0 0x20000>;
+                               };
+
+                               partition@20000 {
+                                       label = "system";
+                                       reg = <0x20000 0x0>;
+                               };
+                       };
+               };
+       };
+};
+
+&cgu {
+       /* Use 32kHz oscillator as the parent of the RTC clock */
+       assigned-clocks = <&cgu JZ4725B_CLK_RTC>;
+       assigned-clock-parents = <&cgu JZ4725B_CLK_OSC32K>;
+};
+
+&tcu {
+       /*
+        * 750 kHz for the system timer and clocksource, and use RTC as the
+        * parent for the watchdog clock.
+        */
+       assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>, <&tcu TCU_CLK_WDT>;
+       assigned-clock-parents = <0>, <0>, <&cgu JZ4725B_CLK_RTC>;
+       assigned-clock-rates = <750000>, <750000>;
+};
+
+&lcd {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pins_lcd>;
+
+       port {
+               panel_output: endpoint {
+                       remote-endpoint = <&panel_input>;
+               };
+       };
+};

diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
index 0325153..baa315c 100644 (file)
--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -15,6 +15,10 @@ config JZ4740_QI_LB60
        bool "Qi Hardware Ben NanoNote"
        select MACH_JZ4740
 
+config JZ4740_RS90
+       bool "YLM RetroMini (RS-90)"
+       select MACH_JZ4725B
+
 config JZ4770_GCW0
        bool "Game Consoles Worldwide GCW Zero"
        select MACH_JZ4770