Re: [PATCH 6/6] ARM: dts: gr8: Add support for the GR8 evaluation board

[Chen-Yu Tsai <wens@csie.org>]

Hi,

On Wed, Aug 31, 2016 at 4:18 PM, Maxime Ripard
<maxime.ripard@free-electrons.com> wrote:
> From: Mylène Josserand <mylene.josserand@free-electrons.com>
>
> The GR8-EVB is a small board with an NextThing GR8, an Hynix MLC NAND,
> an AXP209 PMIC, USB host and OTG, an SPDIF output and a connectors for CSI,
> I2S and LCD.
>
> Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  arch/arm/boot/dts/Makefile    |   3 +-
>  arch/arm/boot/dts/gr8-evb.dts | 378 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 380 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm/boot/dts/gr8-evb.dts
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 7dd4a07c4784..8226b0a2e178 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -734,7 +734,8 @@ dtb-$(CONFIG_MACH_SUN5I) += \
>         sun5i-a13-olinuxino-micro.dtb \
>         sun5i-a13-q8-tablet.dtb \
>         sun5i-a13-utoo-p66.dtb \
> -       sun5i-r8-chip.dtb
> +       sun5i-r8-chip.dtb \
> +       gr8-evb.dtb
>  dtb-$(CONFIG_MACH_SUN6I) += \
>         sun6i-a31-app4-evb1.dtb \
>         sun6i-a31-colombus.dtb \
> diff --git a/arch/arm/boot/dts/gr8-evb.dts b/arch/arm/boot/dts/gr8-evb.dts
> new file mode 100644
> index 000000000000..e334d18d7bf0
> --- /dev/null
> +++ b/arch/arm/boot/dts/gr8-evb.dts
> @@ -0,0 +1,378 @@
> +/*
> + * Copyright 2016 Free Electrons
> + * Copyright 2016 NextThing Co
> + *
> + * Mylène Josserand <mylene.josserand@free-electrons.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 "gr8.dtsi"
> +#include "sunxi-common-regulators.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +/ {
> +       model = "NextThing GR8-EVB";
> +       compatible = "nextthing,gr8-evb", "nextthing,gr8";
> +
> +       aliases {
> +               i2c0 = &i2c0;
> +               i2c1 = &i2c1;
> +               i2c2 = &i2c2;
> +               serial0 = &uart1;
> +               serial1 = &uart2;
> +       };
> +
> +       chosen {
> +               stdout-path = "serial0:115200n8";
> +       };
> +
> +       backlight: backlight {
> +               compatible = "pwm-backlight";
> +               pwms = <&pwm 0 10000 0>;
> +               enable-gpios = <&axp_gpio 1 GPIO_ACTIVE_HIGH>;
> +
> +               brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
> +               default-brightness-level = <8>;
> +       };
> +
> +       panel {
> +               compatible = "allwinner,sun4i-a10-sub-evb-5-lcd";
> +               enable-gpios = <&axp_gpio 0 GPIO_ACTIVE_HIGH>;
> +               backlight = <&backlight>;
> +               power-supply = <&reg_vcc3v0>;
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               port@0 {
> +                       reg = <0>;
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +
> +                       panel_input: endpoint@0 {
> +                               reg = <0>;
> +                               remote-endpoint = <&tcon0_out_panel>;
> +                       };
> +               };
> +       };
> +};
> +
> +&be0 {
> +       status = "okay";
> +};
> +
> +&codec {
> +       status = "okay";
> +};
> +
> +&ehci0 {
> +       status = "okay";
> +};
> +
> +&i2c0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c0_pins_a>;
> +       status = "okay";
> +
> +       axp209: pmic@34 {
> +               reg = <0x34>;
> +
> +               /*
> +               * The interrupt is routed through the "External Fast
> +               * Interrupt Request" pin (ball G13 of the module)
> +               * directly to the main interrupt controller, without
> +               * any other controller interfering.
> +               */
> +               interrupts = <0>;
> +       };
> +};
> +
> +#include "axp209.dtsi"
> +
> +&i2c1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c1_pins_a>;
> +       status = "okay";
> +
> +       pcf8563: rtc@51 {
> +               compatible = "phg,pcf8563";
> +               reg = <0x51>;
> +       };
> +
> +       wm8978: codec@1a {
> +               #sound-dai-cells = <0>;
> +               compatible = "wlf,wm8978";
> +               reg = <0x1a>;
> +       };
> +};
> +
> +&i2c2 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c2_pins_a>;
> +       status = "okay";
> +};
> +
> +&i2s0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2s0_pins_a>;
> +       status = "okay";
> +};
> +
> +&ir0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&ir0_rx_pins_a>;
> +       status = "okay";
> +};
> +
> +&lradc {
> +       vref-supply = <&reg_ldo2>;
> +       status = "okay";
> +
> +       button@190 {
> +               label = "Volume Up";
> +               linux,code = <KEY_VOLUMEUP>;
> +               channel = <0>;
> +               voltage = <190000>;
> +       };
> +
> +       button@390 {
> +               label = "Volume Down";
> +               linux,code = <KEY_VOLUMEDOWN>;
> +               channel = <0>;
> +               voltage = <390000>;
> +       };
> +
> +       button@600 {
> +               label = "Menu";
> +               linux,code = <KEY_MENU>;
> +               channel = <0>;
> +               voltage = <600000>;
> +       };
> +
> +       button@800 {
> +               label = "Search";
> +               linux,code = <KEY_SEARCH>;
> +               channel = <0>;
> +               voltage = <800000>;
> +       };
> +
> +       button@980 {
> +               label = "Home";
> +               linux,code = <KEY_HOMEPAGE>;
> +               channel = <0>;
> +               voltage = <980000>;
> +       };
> +
> +       button@1180 {
> +               label = "Esc";
> +               linux,code = <KEY_ESC>;
> +               channel = <0>;
> +               voltage = <1180000>;
> +       };
> +
> +       button@1400 {
> +               label = "Enter";
> +               linux,code = <KEY_ENTER>;
> +               channel = <0>;
> +               voltage = <1400000>;
> +       };
> +};
> +
> +&mmc0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_gr8_evb>;
> +       vmmc-supply = <&reg_vcc3v3>;
> +       bus-width = <4>;
> +       cd-gpios = <&pio 6 0 GPIO_ACTIVE_HIGH>; /* PG0 */
> +       cd-inverted;
> +       status = "okay";
> +};
> +
> +&nfc {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&nand_pins_a &nand_cs0_pins_a &nand_rb0_pins_a>;
> +
> +       /* MLC Support sucks for now */
> +       status = "disabled";
> +};
> +
> +&ohci0 {
> +       status = "okay";
> +};
> +
> +&otg_sram {
> +       status = "okay";
> +};
> +
> +&pio {
> +       mmc0_cd_pin_gr8_evb: mmc0-cd-pin@0 {
> +               allwinner,pins = "PG0";
> +               allwinner,function = "gpio_in";
> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +       };
> +
> +       usb0_id_pin_gr8_evb: usb0-id-pin@0 {
> +               allwinner,pins = "PG2";
> +               allwinner,function = "gpio_in";
> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +       };
> +
> +       usb0_vbus_det_pin_gr8_evb: usb0-vbus-det-pin@0 {
> +               allwinner,pins = "PG1";
> +               allwinner,function = "gpio_in";
> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +       };
> +
> +       usb1_vbus_pin_gr8_evb: usb1-vbus-pin@0 {
> +               allwinner,pins = "PG13";
> +               allwinner,function = "gpio_out";
> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +       };
> +};
> +
> +&pwm {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pwm0_pins_a>;
> +       status = "okay";
> +};
> +
> +&reg_dcdc2 {
> +       regulator-min-microvolt = <1000000>;
> +       regulator-max-microvolt = <1400000>;
> +       regulator-name = "vdd-cpu";
> +       regulator-always-on;
> +};
> +
> +&reg_dcdc3 {
> +       regulator-min-microvolt = <1000000>;
> +       regulator-max-microvolt = <1300000>;
> +       regulator-name = "vdd-sys";
> +       regulator-always-on;
> +};
> +
> +&reg_ldo1 {
> +       regulator-name = "vdd-rtc";
> +};
> +
> +&reg_ldo2 {
> +       regulator-min-microvolt = <2700000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "avcc";
> +       regulator-always-on;
> +};
> +
> +&reg_usb1_vbus {
> +       pinctrl-0 = <&usb1_vbus_pin_gr8_evb>;
> +       gpio = <&pio 6 13 GPIO_ACTIVE_HIGH>;
> +       status = "okay";
> +};
> +
> +&rtp {
> +       allwinner,ts-attached;
> +};
> +
> +&spdif {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&spdif_tx_pins_a>;
> +       status = "okay";
> +};
> +
> +&tcon0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&lcd_rgb666_pins>;
> +       status = "okay";
> +};
> +
> +&tcon0_out {
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +
> +       tcon0_out_panel: endpoint@0 {
> +               reg = <0>;
> +               remote-endpoint = <&panel_input>;
> +       };
> +};
> +
> +&tve0 {
> +       status = "okay";
> +};
> +
> +&uart1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&uart1_pins_a>, <&uart1_cts_rts_pins_a>;
> +       status = "okay";
> +};
> +
> +&usb_otg {
> +       /*
> +        * The GR8-EVB has a somewhat interesting design. There's a
> +        * pin supposed to control VBUS, an ID pin, a VBUS detect pin,
> +        * so everything should work just fine.
> +        *
> +        * Except that the pin supposed to control VBUS is not
> +        * connected to any controllable output, neither to the SoC
> +        * through a GPIO or to the PMIC, and it is pulled down,
> +        * meaning that we will never be able to enable VBUS on this
> +        * board.
> +        */

IIRC, Hans made OTG work with boards that don't have VBUS control.
All you need is a powered hub. And since there's no chance of VBUS
going back through the connection to hurt the host on the other end
when in peripheral mode, I think it's ok to put it in OTG mode here.

The rest looks fine.

ChenYu

> +       dr_mode = "peripheral";
> +       status = "okay";
> +};
> +
> +&usb_power_supply {
> +       status = "okay";
> +};
> +
> +&usbphy {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&usb0_id_pin_gr8_evb>, <&usb0_vbus_det_pin_gr8_evb>;
> +       usb0_id_det-gpio = <&pio 6 2 GPIO_ACTIVE_HIGH>; /* PG2 */
> +       usb0_vbus_det-gpio = <&pio 6 1 GPIO_ACTIVE_HIGH>; /* PG1 */
> +       usb0_vbus_power-supply = <&usb_power_supply>;
> +       usb1_vbus-supply = <&reg_usb1_vbus>;
> +       status = "okay";
> +};
> --
> 2.9.2
>

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