Date:   Fri, 1 Nov 2019 11:01:01 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Karl Palsson <karlp@...ak.net.au>
Cc:     Maxime Ripard <mripard@...nel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] ARM: dts: sun8i: add FriendlyARM NanoPi Duo2

On Fri, Nov 1, 2019 at 7:12 AM Karl Palsson <karlp@...ak.net.au> wrote:
>
> This is an Allwinner H3 based board, with 512MB ram, a USB OTG port,
> microsd slot, an onboard AP6212A wifi/bluetooth module, and a CSI
> connector.
>
> Full details and schematic available from vendor:
> http://wiki.friendlyarm.com/wiki/index.php/NanoPi_Duo2
>
> Signed-off-by: Karl Palsson <karlp@...ak.net.au>
> ---
>  arch/arm/boot/dts/Makefile                 |   1 +
>  arch/arm/boot/dts/sun8i-h3-nanopi-duo2.dts | 161 +++++++++++++++++++++
>  2 files changed, 162 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sun8i-h3-nanopi-duo2.dts
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 9159fa2cea90..d8bf02abcda1 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -1096,6 +1096,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
>         sun8i-h3-beelink-x2.dtb \
>         sun8i-h3-libretech-all-h3-cc.dtb \
>         sun8i-h3-mapleboard-mp130.dtb \
> +       sun8i-h3-nanopi-duo2.dtb \
>         sun8i-h3-nanopi-m1.dtb  \
>         sun8i-h3-nanopi-m1-plus.dtb \
>         sun8i-h3-nanopi-neo.dtb \
> diff --git a/arch/arm/boot/dts/sun8i-h3-nanopi-duo2.dts b/arch/arm/boot/dts/sun8i-h3-nanopi-duo2.dts
> new file mode 100644
> index 000000000000..ecfaaa0ec73e
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun8i-h3-nanopi-duo2.dts
> @@ -0,0 +1,161 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2019 Karl Palsson <karlp@...ak.net.au>
> + */
> +
> +/dts-v1/;
> +#include "sun8i-h3.dtsi"
> +#include "sunxi-common-regulators.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +
> +/ {
> +       model = "FriendlyARM NanoPi Duo2";
> +       compatible = "friendlyarm,nanopi-duo2", "allwinner,sun8i-h3";
> +
> +       aliases {
> +               serial0 = &uart0;
> +       };
> +
> +       chosen {
> +               stdout-path = "serial0:115200n8";
> +       };
> +
> +       leds {
> +               compatible = "gpio-leds";
> +
> +               status {
> +                       label = "nanopi:green:status";
> +                       gpios = <&pio 0 10 GPIO_ACTIVE_HIGH>;

Can you add the pin name as a comment after this, like you already have
for most of the other gpios entries?

> +                       linux,default-trigger = "heartbeat";

I'm not so found of this. Unless the LED actually says "heartbeat",
I don't think we should force a default.

> +               };
> +
> +               pwr {
> +                       label = "nanopi:red:pwr";
> +                       gpios = <&r_pio 0 10 GPIO_ACTIVE_HIGH>;

Here as well.

> +                       default-state = "on";
> +               };
> +       };
> +
> +       r_gpio_keys {
> +               compatible = "gpio-keys";
> +
> +               k1 {
> +                       label = "k1";
> +                       linux,code = <BTN_0>;
> +                       gpios = <&r_pio 0 3 GPIO_ACTIVE_LOW>;
> +               };
> +       };
> +
> +       reg_vdd_cpux: vdd-cpux-regulator {
> +               compatible = "regulator-gpio";
> +               regulator-name = "vdd-cpux";
> +               regulator-boot-on;
> +               regulator-always-on;
> +               regulator-min-microvolt = <1100000>;
> +               regulator-max-microvolt = <1300000>;
> +               regulator-ramp-delay = <50>; /* 4ms */
> +
> +               gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */

This regulator also uses a GPIO line for its enable pin.
Please include that.

> +               enable-active-high;
> +               gpios-states = <0x1>;
> +               states = <1100000 0x0
> +                         1300000 0x1>;
> +       };

Please also add the two other regulators, VDD-SYS and VCC-DRAM.

> +
> +       wifi_pwrseq: wifi_pwrseq {
> +               compatible = "mmc-pwrseq-simple";
> +               reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>; /* PL7 */
> +               clocks = <&rtc 1>;
> +               clock-names = "ext_clock";
> +       };
> +
> +};
> +
> +&cpu0 {
> +       cpu-supply = <&reg_vdd_cpux>;
> +};
> +
> +&usb_otg {
> +       status = "okay";
> +       dr_mode = "otg";
> +};
> +
> +&ehci0 {
> +       status = "okay";
> +};
> +
> +&ohci0 {
> +       status = "okay";
> +};
> +
> +&reg_usb0_vbus {
> +       gpio = <&r_pio 0 2 GPIO_ACTIVE_HIGH>; /* PL2 */
> +       status = "okay";
> +};
> +
> +&usbphy {
> +       usb0_id_det-gpios = <&pio 6 12 GPIO_ACTIVE_HIGH>; /* PG12 */
> +       usb0_vbus-supply = <&reg_usb0_vbus>;
> +       status = "okay";
> +};

Please have the nodes in alphabetic order, not group them by function.

> +
> +&mmc0 {
> +       bus-width = <4>;
> +       cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;
> +       status = "okay";
> +       vmmc-supply = <&reg_vcc3v3>;
> +};
> +
> +&mmc1 {
> +       vmmc-supply = <&reg_vcc3v3>;
> +       vqmmc-supply = <&reg_vcc3v3>;
> +       mmc-pwrseq = <&wifi_pwrseq>;
> +       bus-width = <4>;
> +       non-removable;
> +       status = "okay";
> +
> +       sdio_wifi: sdio_wifi@1 {
> +               reg = <1>;
> +               compatible = "brcm,bcm4329-fmac";
> +               interrupt-parent = <&pio>;
> +               interrupts = <6 10 IRQ_TYPE_LEVEL_LOW>; /* PG10 / EINT10 */
> +               interrupt-names = "host-wake";
> +       };
> +};
> +
> +&uart0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&uart0_pa_pins>;
> +       status = "okay";
> +};
> +
> +&uart2 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&uart2_pins>, <&uart2_rts_cts_pins>;
> +       uart-has-rtscts;
> +       status = "okay";
> +
> +       bluetooth {
> +               compatible = "brcm,bcm43438-bt";
> +               //clocks = <&osc32k 1>;
> +               clocks = <&rtc 1>; // this is what bananapi-m2-zero does, and it has same schematic...

Yes, this is the correct setup. The module is taking the clock from
the X32KFOUT on the SoC.
This is an external output from the RTC module.

> +               clock-names = "lpo";
> +
> +               // these are both fine..
> +               vbat-supply = <&reg_vcc3v3>;
> +               vddio-supply = <&reg_vcc3v3>;
> +               // on opi-win, device-wakup is pl6 is AP-WAKE-BT is module pin 6, bt-wake.
> +               // YES; PA8 is correct.
> +               device-wakeup-gpios = <&pio 0 8 GPIO_ACTIVE_HIGH>; /* PA8 */
> +
> +               // on opi-win, hostwakeup (pl5) is bt-wake-ap is module pin 7, bt-host-wake
> +               // YES; PA7 is correct
> +               host-wakeup-gpios = <&pio 0 7 GPIO_ACTIVE_HIGH>; /* PA7 */
> +
> +               // on opi-win, shutdown is pl4, is BT-RST-N is moduel pin 34
> +               // YES; PG13 is correct.

I'm guessing all these comments are from your development cycle? Please
remove them.

> +               shutdown-gpios = <&pio 6 13 GPIO_ACTIVE_HIGH>; /* PG13 */
> +       };
> +};

The board also has SPI flash. Can you add that as well?


Thanks
ChenYu

> --
> 2.20.1
>

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