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Date:   Wed, 11 Mar 2020 11:10:41 +0100
From:   Pascal Roeleven <dev@pascalroeleven.nl>
To:     =?UTF-8?Q?Ond=C5=99ej_Jirman?= <megous@megous.com>
Cc:     Thierry Reding <thierry.reding@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Maxime Ripard <mripard@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>, dri-devel@lists.freedesktop.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com
Subject: Re: [linux-sunxi] [PATCH 2/2] ARM: dts: sun4i: Add support for
 Topwise A721 tablet
In-Reply-To: <20200310140202.ntydtg4seosb2aqs@core.my.home>
References: <20200310102725.14591-1-dev@pascalroeleven.nl>
 <20200310102725.14591-3-dev@pascalroeleven.nl>
 <20200310140202.ntydtg4seosb2aqs@core.my.home>
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On 2020-03-10 15:02, Ondřej Jirman wrote:
> Hello Pascal,
> 
> On Tue, Mar 10, 2020 at 11:27:24AM +0100, Pascal Roeleven wrote:
>> The Topwise A721/LY-F1 tablet is a tablet sold around 2012 under
>> different brands. The mainboard mentions A721 clearly, so this tablet
>> is best known under this name.
>> 
>> Signed-off-by: Pascal Roeleven <dev@pascalroeleven.nl>
>> ---
>>  arch/arm/boot/dts/Makefile                   |   3 +-
>>  arch/arm/boot/dts/sun4i-a10-topwise-a721.dts | 302 
>> +++++++++++++++++++
>>  2 files changed, 304 insertions(+), 1 deletion(-)
>>  create mode 100644 arch/arm/boot/dts/sun4i-a10-topwise-a721.dts
>> 
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index 78f144e33..6e6141e00 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -1040,7 +1040,8 @@ dtb-$(CONFIG_MACH_SUN4I) += \
>>  	sun4i-a10-olinuxino-lime.dtb \
>>  	sun4i-a10-pcduino.dtb \
>>  	sun4i-a10-pcduino2.dtb \
>> -	sun4i-a10-pov-protab2-ips9.dtb
>> +	sun4i-a10-pov-protab2-ips9.dtb \
>> +	sun4i-a10-topwise-a721.dtb
>>  dtb-$(CONFIG_MACH_SUN5I) += \
>>  	sun5i-a10s-auxtek-t003.dtb \
>>  	sun5i-a10s-auxtek-t004.dtb \
>> diff --git a/arch/arm/boot/dts/sun4i-a10-topwise-a721.dts 
>> b/arch/arm/boot/dts/sun4i-a10-topwise-a721.dts
>> new file mode 100644
>> index 000000000..ff43c9c12
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sun4i-a10-topwise-a721.dts
>> @@ -0,0 +1,302 @@
>> +/*
>> + * Copyright 2020 Pascal Roeleven <dev@pascalroeleven.nl>
>> + *
>> + * 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.
>> + */
> 
> You should use SPDX license identifier instead of boilerplate license
> text.
> 
>> +/dts-v1/;
>> +#include "sun4i-a10.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>
>> +#include <dt-bindings/pwm/pwm.h>
>> +
>> +/ {
>> +	model = "Topwise A721";
>> +	compatible = "topwise,a721", "allwinner,sun4i-a10";
> 
> topwise is not in vendor-prefixes.yaml
> 
>> +	aliases {
>> +		serial0 = &uart0;
>> +	};
>> +
>> +	backlight: backlight {
>> +		compatible = "pwm-backlight";
>> +		pwms = <&pwm 0 100000 PWM_POLARITY_INVERTED>;
>> +		power-supply = <&reg_vbat>;
>> +		enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
>> +		brightness-levels = <0 30 40 50 60 70 80 90 100>;
>> +		default-brightness-level = <8>;
>> +	};
>> +
>> +	chosen {
>> +		stdout-path = "serial0:115200n8";
>> +	};
>> +
>> +	panel: panel {
>> +		compatible = "starry,kr070pe2t";
>> +		backlight = <&backlight>;
>> +		power-supply = <&reg_lcd_power>;
>> +
>> +		port {
>> +			panel_input: endpoint {
>> +				remote-endpoint = <&tcon0_out_panel>;
>> +			};
>> +		};
>> +	};
>> +
>> +	reg_lcd_power: reg-lcd-power {
>> +		compatible = "regulator-fixed";
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&lcd_power_pin>;
>> +		regulator-name = "reg-lcd-power";
>> +		gpio = <&pio 7 8 GPIO_ACTIVE_HIGH>; /* PH8 */
>> +		enable-active-high;
>> +	};
>> +
>> +	reg_vbat: reg-vbat {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "vbat";
>> +		regulator-min-microvolt = <3700000>;
>> +		regulator-max-microvolt = <3700000>;
>> +	};
>> +
>> +};
>> +
>> +&codec {
>> +	status = "okay";
>> +};
>> +
>> +&cpu0 {
>> +	cpu-supply = <&reg_dcdc2>;
>> +};
>> +
>> +&de {
>> +	status = "okay";
>> +};
>> +
>> +&ehci0 {
>> +	status = "okay";
>> +};
>> +
>> +&ehci1 {
>> +	status = "okay";
>> +};
>> +
>> +&i2c0 {
>> +	status = "okay";
>> +
>> +	axp209: pmic@34 {
>> +		reg = <0x34>;
>> +		interrupts = <0>;
>> +	};
>> +};
>> +
>> +#include "axp209.dtsi"
>> +
>> +&ac_power_supply {
>> +	status = "okay";
>> +};
>> +
>> +&battery_power_supply {
>> +	status = "okay";
>> +};
>> +
>> +&i2c1 {
>> +	status = "okay";
>> +
>> +	mma7660: accelerometer@4c {
>> +		compatible = "fsl,mma7660";
>> +		reg = <0x4c>;
>> +	};
>> +};
>> +
>> +&i2c2 {
>> +	status = "okay";
>> +
>> +	ft5406ee8: touchscreen@38 {
>> +		compatible = "edt,edt-ft5406";
>> +		reg = <0x38>;
>> +		interrupt-parent = <&pio>;
>> +		interrupts = <7 21 IRQ_TYPE_EDGE_FALLING>;
>> +		touchscreen-size-x = <800>;
>> +		touchscreen-size-y = <480>;
>> +		vcc-supply = <&reg_vcc3v3>;
>> +	};
>> +};
>> +
>> +&lradc {
>> +	vref-supply = <&reg_ldo2>;
>> +	status = "okay";
>> +
>> +	button-vol-down {
>> +		label = "Volume Down";
>> +		linux,code = <KEY_VOLUMEDOWN>;
>> +		channel = <0>;
>> +		voltage = <761904>;
>> +	};
>> +
>> +	button-vol-up {
>> +		label = "Volume Up";
>> +		linux,code = <KEY_VOLUMEUP>;
>> +		channel = <0>;
>> +		voltage = <571428>;
>> +	};
>> +};
>> +
>> +&mmc0 {
>> +	vmmc-supply = <&reg_vcc3v3>;
>> +	bus-width = <4>;
>> +	cd-gpios = <&pio 7 1 GPIO_ACTIVE_LOW>; /* PH01 */
>> +	status = "okay";
>> +};
>> +
>> +&ohci0 {
>> +	status = "okay";
>> +};
>> +
>> +&ohci1 {
>> +	status = "okay";
>> +};
>> +
>> +&otg_sram {
>> +	status = "okay";
>> +};
>> +
>> +&pio {
>> +	vcc-pb-supply = <&reg_vcc3v3>;
>> +	vcc-pf-supply = <&reg_vcc3v3>;
>> +	vcc-ph-supply = <&reg_vcc3v3>;
>> +
>> +	lcd_power_pin: lcd-power-pin {
>> +		pins = "PH8";
>> +		function = "gpio_out";
>> +		bias-pull-up;
>> +	};
>> +
>> +	usb0_id_detect_pin: usb0-id-detect-pin {
>> +		pins = "PH4";
>> +		function = "gpio_in";
>> +		bias-pull-up;
>> +	};
>> +
>> +	usb0_vbus_detect_pin: usb0-vbus-detect-pin {
>> +		pins = "PH5";
>> +		function = "gpio_in";
>> +		bias-pull-down;
>> +	};
> 
> All 3 nodes above can be replaced with appropriate GPIO_PULL_UP / 
> GPIO_PULL_DOWN
> macros inside the *-gpios property.
> 
>> +};
>> +
>> +&pwm {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&pwm0_pin>;
>> +	status = "okay";
>> +};
>> +
>> +&reg_dcdc2 {
>> +	regulator-always-on;
>> +	regulator-min-microvolt = <1000000>;
>> +	regulator-max-microvolt = <1400000>;
>> +	regulator-name = "vdd-cpu";
>> +};
>> +
>> +&reg_dcdc3 {
>> +	regulator-always-on;
>> +	regulator-min-microvolt = <1250000>;
>> +	regulator-max-microvolt = <1250000>;
>> +	regulator-name = "vdd-int-dll";
>> +};
>> +
>> +
> 
> You have extra space here ^
> 
>> +&reg_ldo1 {
>> +	regulator-name = "vdd-rtc";
>> +};
>> +
>> +&reg_ldo2 {
>> +	regulator-always-on;
>> +	regulator-min-microvolt = <3000000>;
>> +	regulator-max-microvolt = <3000000>;
>> +	regulator-name = "avcc";
>> +};
>> +
>> +&reg_usb0_vbus {
>> +	status = "okay";
>> +};
>> +
>> +&reg_usb1_vbus {
>> +	status = "okay";
>> +};
>> +
>> +&reg_usb2_vbus {
>> +	status = "okay";
>> +};
>> +
>> +&tcon0_out {
>> +	tcon0_out_panel: endpoint@0 {
>> +		reg = <0>;
>> +		remote-endpoint = <&panel_input>;
>> +	};
>> +};
>> +
>> +&uart0 {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&uart0_pb_pins>;
>> +	status = "okay";
>> +};
>> +
>> +&usb_otg {
>> +	dr_mode = "otg";
>> +	status = "okay";
>> +};
>> +
>> +&usb_power_supply {
>> +	status = "okay";
>> +};
>> +
>> +&usbphy {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&usb0_id_detect_pin>, <&usb0_vbus_detect_pin>;
> 
> No need to use pinctrl to configure regular GPIO functions anymore.
> 
> regards,
> 	Ondrej
> 
>> +	usb0_id_det-gpios = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
>> +	usb0_vbus_det-gpios = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
>> +	usb0_vbus-supply = <&reg_usb0_vbus>;
>> +	usb1_vbus-supply = <&reg_usb1_vbus>;
>> +	usb2_vbus-supply = <&reg_usb2_vbus>;
>> +	status = "okay";
>> +};
>> --
>> 2.20.1
>> 
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Hi Ondrej,

Thank you for your review. I will be fixing these in v2.