Message-ID: <575FFFBE.5090107@free-electrons.com>
Date:	Tue, 14 Jun 2016 14:59:42 +0200
From:	Quentin Schulz <quentin.schulz@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, linux@...linux.org.uk,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: Re: [PATCH] ARM: sun8i: Add Parrot Board DTS

Hi,

On 13/06/2016 15:04, Chen-Yu Tsai wrote:
> Hi,
> 
> On Mon, Jun 13, 2016 at 6:15 PM, Quentin Schulz
> <quentin.schulz@...e-electrons.com> wrote:
>> The Parrot Board is an evaluation board with an Allwinner R16 (assumed
>> to be close to an Allwinner A33), 4GB of NAND, 512MB of RAM, USB host
> 
> You say NAND here, but you enable mmc2 for eMMC below. Please correct it.
> 

ACK.

>> and OTG, a WiFi/Bluetooth combo chip, a micro SD Card reader, 2
>> controllable buttons, an LVDS port with separated backlight and
>> capacitive touch panel ports, an audio/microphone jack, a camera CSI
>> port, 2 sets of 22 GPIOs and an accelerometer.
> 
> I assume the board is this one:
> 
> https://world.taobao.com/item/530374411673.htm
> 

Definitely looks like it.

>> Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
>> ---
>>  arch/arm/boot/dts/Makefile             |   1 +
>>  arch/arm/boot/dts/sun8i-r16-parrot.dts | 333 +++++++++++++++++++++++++++++++++
>>  2 files changed, 334 insertions(+)
>>  create mode 100644 arch/arm/boot/dts/sun8i-r16-parrot.dts
>>
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index 06b6c2d..1149512 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -760,6 +760,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
>>         sun8i-a33-ippo-q8h-v1.2.dtb \
>>         sun8i-a33-q8-tablet.dtb \
>>         sun8i-a33-sinlinx-sina33.dtb \
>> +       sun8i-r16-parrot.dtb \
>>         sun8i-a83t-allwinner-h8homlet-v2.dtb \
>>         sun8i-a83t-cubietruck-plus.dtb \
>>         sun8i-h3-orangepi-2.dtb \
>> diff --git a/arch/arm/boot/dts/sun8i-r16-parrot.dts b/arch/arm/boot/dts/sun8i-r16-parrot.dts
>> new file mode 100644
>> index 0000000..75e2420
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sun8i-r16-parrot.dts
>> @@ -0,0 +1,333 @@
>> +/*
>> + * Copyright 2015 Quentin Schulz
>> + *
>> + * Quentin Schulz <quentin.schulz@...e-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 "sun8i-a33.dtsi"
>> +#include "sunxi-common-regulators.dtsi"
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/input/input.h>
>> +
>> +/ {
>> +       model = "Allwinner Parrot EVB R16";
>> +       compatible = "allwinner,parrot-evb-r16", "allwinner,sun8i-a33";
>> +
>> +       aliases {
>> +               serial0 = &uart0;
>> +       };
>> +
>> +       chosen {
>> +               stdout-path = "serial0:115200n8";
>> +       };
>> +
>> +       leds {
>> +               compatible = "gpio-leds";
>> +               pinctrl-names = "default";
>> +               pinctrl-0 = <&led_pins_r16>;
> 
> IMO r16 is too generic. You may want to add parrot_ or parrot_evb_ to it.
> Same goes for all the other r16 identifier names.
> 

ACK.

>> +
>> +               led1 {
>> +                       label = "r16:led1:usr";
>> +                       gpio = <&pio 4 17 GPIO_ACTIVE_HIGH>; /* PE17 */
>> +               };
>> +
>> +               led2 {
>> +                       label = "r16:led2:usr";
>> +                       gpio = <&pio 4 16 GPIO_ACTIVE_HIGH>; /* PE16 */
>> +               };
>> +       };
>> +
>> +       wifi_pwrseq: wifi_pwrseq {
>> +               compatible = "mmc-pwrseq-simple";
>> +               reset-gpios = <&r_pio 0 6 GPIO_ACTIVE_LOW>; /* PL06 */
>> +       };
>> +
>> +};
>> +
>> +&ehci0 {
>> +       status = "okay";
>> +};
>> +
>> +&i2c1 {
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&i2c1_pins_a>;
>> +       status = "okay";
> 
> Nothing connected? A comment mentioning which connector this is on
> if it's not directly connecting something on the board would be nice.
> 

An accelerometer is connected to this i2c, but:
1) The given address of the i2c device given by i2cdetect is not the
same as specified in both fex and schematics.
2) The accelerometer has a "product reference" on the schematics for a
Broadcom BMA250 but the associated driver does not work with it.

So there is an accelerometer connected to this i2c but I've not found
yet what can drive it. I could add a comment specifying the
accelerometer is attached to this i2c or remove the node?

>> +};
>> +
>> +&lradc {
>> +       vref-supply = <&reg_aldo3>;
>> +       status = "okay";
>> +
>> +       button@0 {
>> +               label = "V+";
>> +               linux,code = <KEY_VOLUMEUP>;
>> +               channel = <0>;
>> +               voltage = <190000>;
>> +       };
>> +
>> +       button@1 {
>> +               label = "V-";
>> +               linux,code = <KEY_VOLUMEDOWN>;
>> +               channel = <0>;
>> +               voltage = <390000>;
>> +       };
>> +
>> +};
>> +
>> +&mmc0 {
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_parrot>;
>> +       vmmc-supply = <&reg_dcdc1>;
>> +       cd-gpios = <&pio 3 14 GPIO_ACTIVE_LOW>; /* PD14 */
>> +       bus-width = <4>;
>> +       status = "okay";
>> +};
>> +
>> +&mmc1 {
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&mmc1_pins_a>, <&wifi_reset_pin_r16>;
>> +       vmmc-supply = <&reg_aldo1>;
> 
> This looks fishy. See below.
> 
>> +       mmc-pwrseq = <&wifi_pwrseq>;
>> +       bus-width = <4>;
>> +       non-removable;
>> +       status = "okay";
>> +};
>> +
>> +&mmc2 {
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&mmc2_8bit_pins>;
>> +       vmmc-supply = <&reg_dcdc1>;
>> +       bus-width = <8>;
>> +       non-removable;
>> +       cap-mmc-hw-reset;
>> +       status = "okay";
>> +};
>> +
>> +&mmc2_8bit_pins {
>> +       allwinner,drive = <SUN4I_PINCTRL_40_MA>;
>> +       allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
>> +};
>> +
>> +&ohci0 {
>> +       status = "okay";
>> +};
>> +
>> +&pio {
>> +       mmc0_cd_pin_parrot: mmc0_cd_pin@0 {
> 
> _parrot suffix works as well.
> 
>> +               allwinner,pins = "PD14";
>> +               allwinner,function = "gpio_in";
>> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +               allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
>> +       };
>> +
>> +       led_pins_r16: led_pins@0 {
>> +               allwinner,pins = "PE16", "PE17";
>> +               allwinner,function = "gpio_out";
>> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
>> +       };
>> +
>> +       usb0_id_det: usb0_id_detect_pin@0 {
>> +               allwinner,pins = "PD10";
>> +               allwinner,function = "gpio_in";
>> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +               allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
>> +       };
>> +
>> +       usb1_vbus_pin_r16: usb1_vbus_pin@0 {
>> +               allwinner,pins = "PD12";
>> +               allwinner,function = "gpio_out";
>> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
>> +       };
>> +};
>> +
>> +&r_pio {
>> +       wifi_reset_pin_r16: wifi_reset_pin@3 {
> 
> Why @3?
> 

This is a typo, I'll correct it.

>> +               allwinner,pins = "PL6";
>> +               allwinner,function = "gpio_out";
>> +               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
>> +       };
>> +};
>> +
>> +&r_rsb {
>> +       status = "okay";
>> +
>> +       axp22x: pmic@3a3 {
>> +               compatible = "x-powers,axp223";
>> +               reg = <0x3a3>;
>> +               interrupt-parent = <&nmi_intc>;
>> +               interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
>> +               eldoin-supply = <&reg_dcdc1>;
> 
> A drivevbus-supply referencing reg_vcc5v0 here would be better.
> 

ACK.

>> +               x-powers,drive-vbus-en;
>> +       };
>> +};
>> +
>> +#include "axp22x.dtsi"
>> +
>> +&reg_aldo1 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <3000000>;
>> +       regulator-max-microvolt = <3000000>;
>> +       regulator-name = "aldo1";
> 
> What is this for exactly? Would turning it off render the system inoperable?
> How was it referenced in the fex file?
> 
> If this is for WiFi I/O VCC, then you should specify it in mmc1 with
> vqmmc-supply.
> 

In the fex, aldo1 is one of the three power inputs for the WiFi (the
others being dldo1 and dldo2) and in the schematics it is linked to
both VCC-USB and VCC-IO-WIFI.

I tried to turn it off and, indeed, the system becomes inoperable.

I'll add vqmmc-supply in mmc1 with aldo1 regulator. However, I am
wondering what to put in vmmc-supply for mmc1 since the WiFi module has
three power inputs: dldo1, dldo2 and aldo1. In the fex, they are
referenced as, respectively, module_power1, module_power2 and
module_power3 and in the schematics dldo1 and dldo2 are named VCC-WIFI
while aldo1 is used for VCC-IO-WIFI (if it can help in any way).

VCC-WIFI is connected to pin VBAT of the Broadcom AP6212 WiFi chip.
VCC-IO-WIFI is connected to pin VDDIO of the chip.

>> +};
>> +
>> +&reg_aldo2 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <2350000>;
>> +       regulator-max-microvolt = <2650000>;
>> +       regulator-name = "vdd-dll";
>> +};
>> +
>> +&reg_aldo3 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <2700000>;
>> +       regulator-max-microvolt = <3300000>;
>> +       regulator-name = "vcc-pll-avcc";
>> +};
>> +
>> +&reg_dc5ldo {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <900000>;
>> +       regulator-max-microvolt = <1400000>;
>> +       regulator-name = "vdd-cpus";
>> +};
>> +
>> +&reg_dcdc1 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <3000000>;
>> +       regulator-max-microvolt = <3000000>;
>> +       regulator-name = "vcc-3v0";
>> +};
>> +
>> +&reg_dcdc2 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <900000>;
>> +       regulator-max-microvolt = <1400000>;
>> +       regulator-name = "vdd-sys";
>> +};
>> +
>> +&reg_dcdc3 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <900000>;
>> +       regulator-max-microvolt = <1400000>;
>> +       regulator-name = "vdd-cpu";
>> +};
>> +
>> +&reg_dcdc5 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <1500000>;
>> +       regulator-max-microvolt = <1500000>;
>> +       regulator-name = "vcc-dram";
>> +};
>> +
>> +&reg_dldo1 {
>> +       regulator-always-on;
> 
> A comment saying why this is always on would be nice.
> I assume this is and dldo2 are waiting on regulator supply list support.
> 

dldo1 and dldo2 are not always on. It is a mistake on my side. Certainly
left after quick debugging sessions for the WiFi.

>> +       regulator-min-microvolt = <3300000>;
>> +       regulator-max-microvolt = <3300000>;
>> +       regulator-name = "vcc-wifi";
>> +};
>> +
>> +&reg_dldo2 {
>> +       regulator-always-on;
>> +       regulator-min-microvolt = <3300000>;
>> +       regulator-max-microvolt = <3300000>;
>> +       regulator-name = "vcc-wifi1";
>> +};
>> +
>> +&reg_dldo3 {
>> +       regulator-min-microvolt = <3000000>;
>> +       regulator-max-microvolt = <3000000>;
>> +       regulator-name = "vcc-3v0-csi";
>> +};
>> +
>> +&reg_drivevbus {
>> +       regulator-name = "usb0-vbus";
>> +       status = "okay";
>> +};
>> +
>> +&reg_eldo1 {
>> +       regulator-min-microvolt = <1200000>;
>> +       regulator-max-microvolt = <1200000>;
>> +       regulator-name = "vcc-1v2-hsic";
>> +};
>> +
>> +&reg_eldo2 {
>> +       regulator-min-microvolt = <3000000>;
>> +       regulator-max-microvolt = <3000000>;
>> +       regulator-name = "dsp-vcc";
>> +};
>> +
>> +&reg_eldo3 {
>> +       regulator-min-microvolt = <3000000>;
>> +       regulator-max-microvolt = <3000000>;
>> +       regulator-name = "eldo3";
> 
> Is this connected or used? If not you could just omit it.
> 

eldo3 is connected to a single GPIO.

>> +};
>> +
>> +&reg_usb1_vbus {
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&usb1_vbus_pin_r16>;
>> +       gpio = <&pio 3 12 GPIO_ACTIVE_HIGH>; /* PD12 */
>> +       status = "okay";
>> +};
>> +
>> +&uart0 {
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&uart0_pins_b>;
>> +       status = "okay";
>> +};
>> +
>> +&usb_otg {
>> +       dr_mode = "otg";
>> +       status = "okay";
>> +};
>> +
>> +&usbphy {
>> +       status = "okay";
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&usb0_id_det>;
>> +       usb0_vbus-supply = <&reg_drivevbus>;
>> +       usb0_id_det-gpios = <&pio 3 10 GPIO_ACTIVE_HIGH>; /* PD10 */
> 
> No vbus detect or vbus-power-supply? Though IIRC it still works, just slower.
> 

Adding "usb0_vbus_power-supply = <&usb_power_suply>;" (and setting
status of usb_power_supply to okay) makes the micro USB port not
detecting USB cable plugged in (in host or peripheral mode).

In the fex, the vbus_det-gpio is "apx_ctrl", I guess this means we don't
have a GPIO for vbus detection?

Thanks!

Regards,
Quentin

> Regards,
> ChenYu
> 
>> +       usb1_vbus-supply = <&reg_usb1_vbus>; /* USB1 VBUS is always on */
>> +};
>> --
>> 2.5.0
>>

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