Message-ID: <ee3b13fb-109d-ca5a-537e-27cce50926e1@microchip.com>
Date:   Mon, 15 Aug 2022 17:37:11 +0000
From:   <Conor.Dooley@...rochip.com>
To:     <samuel@...lland.org>, <wens@...e.org>, <jernej.skrabec@...il.com>,
        <linux-sunxi@...ts.linux.dev>, <palmer@...belt.com>,
        <paul.walmsley@...ive.com>, <aou@...s.berkeley.edu>,
        <linux-riscv@...ts.infradead.org>
CC:     <robh+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <krzysztof.kozlowski+dt@...aro.org>
Subject: Re: [PATCH 07/12] riscv: dts: allwinner: Add Allwinner D1 Nezha
 devicetree

On 15/08/2022 06:08, Samuel Holland wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> "D1 Nezha" is Allwinner's first-party development board for the D1 SoC.
> It was shipped with 512M, 1G, or 2G of DDR3. It supports onboard audio,
> HDMI, gigabit Ethernet, WiFi and Bluetooth, USB 2.0 host and OTG ports,
> plus low-speed I/O from the SoC and a GPIO expander chip.
> 
> Most other D1 boards copied the Nezha's power tree, with the 1.8V rail
> powered by the SoCs internal LDOA, analog domains powered by ALDO, and
> the rest of the board powered by always-on fixed regulators. Some (but
> not all) boards also copied the PWM CPU regulator. To avoid duplication,
> factor out the out the regulator references that are common across all
> known boards.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>

Hey Samuel,
Replying here as it's the board I happen to have but I saw some kernel
panics. Some of this has reproduced for Ron/drmpeg on an unmatched:
https://www.w6rz.net/segfault.png
but some of this is different:
https://gist.github.com/ConchuOD/7d87f574df1ddc56f192e505ecab6574

defconfig is default riscv defconfig - the DRM modules + my cmdline:
CONFIG_CMDLINE="earlyprintk=sunxi-uart,0x02500000 earlycon console=ttyS0,115200"

lmk if you want anymore info :)
Conor.

> ---
> 
>  arch/riscv/boot/dts/allwinner/Makefile        |   1 +
>  .../sun20i-d1-common-regulators.dtsi          |  51 ++++++
>  .../boot/dts/allwinner/sun20i-d1-nezha.dts    | 171 ++++++++++++++++++
>  3 files changed, 223 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/allwinner/sun20i-d1-common-regulators.dtsi
>  create mode 100644 arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
> 
> diff --git a/arch/riscv/boot/dts/allwinner/Makefile b/arch/riscv/boot/dts/allwinner/Makefile
> index f66554cd5c45..b0a15e8c8d82 100644
> --- a/arch/riscv/boot/dts/allwinner/Makefile
> +++ b/arch/riscv/boot/dts/allwinner/Makefile
> @@ -1 +1,2 @@
>  # SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1-nezha.dtb
> diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1-common-regulators.dtsi b/arch/riscv/boot/dts/allwinner/sun20i-d1-common-regulators.dtsi
> new file mode 100644
> index 000000000000..143a3e710c3c
> --- /dev/null
> +++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-common-regulators.dtsi
> @@ -0,0 +1,51 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +// Copyright (C) 2021-2022 Samuel Holland <samuel@...lland.org>
> +
> +/ {
> +       reg_vcc: vcc {
> +               compatible = "regulator-fixed";
> +               regulator-name = "vcc";
> +               regulator-min-microvolt = <5000000>;
> +               regulator-max-microvolt = <5000000>;
> +       };
> +
> +       reg_vcc_3v3: vcc-3v3 {
> +               compatible = "regulator-fixed";
> +               regulator-name = "vcc-3v3";
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +               vin-supply = <&reg_vcc>;
> +       };
> +};
> +
> +&lradc {
> +       vref-supply = <&reg_aldo>;
> +};
> +
> +&pio {
> +       vcc-pb-supply = <&reg_vcc_3v3>;
> +       vcc-pc-supply = <&reg_vcc_3v3>;
> +       vcc-pd-supply = <&reg_vcc_3v3>;
> +       vcc-pe-supply = <&reg_vcc_3v3>;
> +       vcc-pf-supply = <&reg_vcc_3v3>;
> +       vcc-pg-supply = <&reg_vcc_3v3>;
> +};
> +
> +&reg_aldo {
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       vdd33-supply = <&reg_vcc_3v3>;
> +};
> +
> +&reg_hpldo {
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       hpldoin-supply = <&reg_vcc_3v3>;
> +};
> +
> +&reg_ldoa {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       ldo-in-supply = <&reg_vcc_3v3>;
> +};
> diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
> new file mode 100644
> index 000000000000..df865ee15fcf
> --- /dev/null
> +++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
> @@ -0,0 +1,171 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +// Copyright (C) 2021-2022 Samuel Holland <samuel@...lland.org>
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +
> +#include "sun20i-d1.dtsi"
> +#include "sun20i-d1-common-regulators.dtsi"
> +
> +/ {
> +       model = "Allwinner D1 Nezha";
> +       compatible = "allwinner,d1-nezha", "allwinner,sun20i-d1";
> +
> +       aliases {
> +               ethernet0 = &emac;
> +               ethernet1 = &xr829;
> +               mmc0 = &mmc0;
> +               serial0 = &uart0;
> +       };
> +
> +       chosen {
> +               stdout-path = "serial0:115200n8";
> +       };
> +
> +       reg_usbvbus: usbvbus {
> +               compatible = "regulator-fixed";
> +               regulator-name = "usbvbus";
> +               regulator-min-microvolt = <5000000>;
> +               regulator-max-microvolt = <5000000>;
> +               gpio = <&pio 3 19 GPIO_ACTIVE_HIGH>; /* PD19 */
> +               enable-active-high;
> +               vin-supply = <&reg_vcc>;
> +       };
> +
> +       /*
> +        * This regulator is PWM-controlled, but the PWM controller is not
> +        * yet supported, so fix the regulator to its default voltage.
> +        */
> +       reg_vdd_cpu: vdd-cpu {
> +               compatible = "regulator-fixed";
> +               regulator-name = "vdd-cpu";
> +               regulator-min-microvolt = <1100000>;
> +               regulator-max-microvolt = <1100000>;
> +               vin-supply = <&reg_vcc>;
> +       };
> +
> +       wifi_pwrseq: wifi-pwrseq {
> +               compatible = "mmc-pwrseq-simple";
> +               reset-gpios = <&pio 6 12 GPIO_ACTIVE_LOW>; /* PG12 */
> +       };
> +};
> +
> +&cpu0 {
> +       cpu-supply = <&reg_vdd_cpu>;
> +};
> +
> +&ehci0 {
> +       status = "okay";
> +};
> +
> +&ehci1 {
> +       status = "okay";
> +};
> +
> +&emac {
> +       pinctrl-0 = <&rgmii_pe_pins>;
> +       pinctrl-names = "default";
> +       phy-handle = <&ext_rgmii_phy>;
> +       phy-mode = "rgmii-id";
> +       phy-supply = <&reg_vcc_3v3>;
> +       status = "okay";
> +};
> +
> +&i2c2 {
> +       pinctrl-0 = <&i2c2_pb0_pins>;
> +       pinctrl-names = "default";
> +       status = "okay";
> +
> +       pcf8574a: gpio@38 {
> +               compatible = "nxp,pcf8574a";
> +               reg = <0x38>;
> +               interrupt-parent = <&pio>;
> +               interrupts = <1 2 IRQ_TYPE_LEVEL_LOW>; /* PB2 */
> +               interrupt-controller;
> +               gpio-controller;
> +               #gpio-cells = <2>;
> +               #interrupt-cells = <2>;
> +       };
> +};
> +
> +&lradc {
> +       status = "okay";
> +
> +       button-160 {
> +               label = "OK";
> +               linux,code = <KEY_OK>;
> +               channel = <0>;
> +               voltage = <160000>;
> +       };
> +};
> +
> +&mdio {
> +       ext_rgmii_phy: ethernet-phy@1 {
> +               compatible = "ethernet-phy-ieee802.3-c22";
> +               reg = <1>;
> +       };
> +};
> +
> +&mmc0 {
> +       bus-width = <4>;
> +       cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>; /* PF6 */
> +       disable-wp;
> +       vmmc-supply = <&reg_vcc_3v3>;
> +       vqmmc-supply = <&reg_vcc_3v3>;
> +       pinctrl-0 = <&mmc0_pins>;
> +       pinctrl-names = "default";
> +       status = "okay";
> +};
> +
> +&mmc1 {
> +       bus-width = <4>;
> +       mmc-pwrseq = <&wifi_pwrseq>;
> +       non-removable;
> +       vmmc-supply = <&reg_vcc_3v3>;
> +       vqmmc-supply = <&reg_vcc_3v3>;
> +       pinctrl-0 = <&mmc1_pins>;
> +       pinctrl-names = "default";
> +       status = "okay";
> +
> +       xr829: wifi@1 {
> +               reg = <1>;
> +       };
> +};
> +
> +&ohci0 {
> +       status = "okay";
> +};
> +
> +&ohci1 {
> +       status = "okay";
> +};
> +
> +&uart0 {
> +       pinctrl-0 = <&uart0_pb8_pins>;
> +       pinctrl-names = "default";
> +       status = "okay";
> +};
> +
> +&uart1 {
> +       uart-has-rtscts;
> +       pinctrl-0 = <&uart1_pg6_pins>, <&uart1_pg8_rts_cts_pins>;
> +       pinctrl-names = "default";
> +       status = "okay";
> +
> +       /* XR829 bluetooth is connected here */
> +};
> +
> +&usb_otg {
> +       dr_mode = "otg";
> +       status = "okay";
> +};
> +
> +&usbphy {
> +       usb0_id_det-gpios = <&pio 3 21 GPIO_ACTIVE_HIGH>; /* PD21 */
> +       usb0_vbus_det-gpios = <&pio 3 20 GPIO_ACTIVE_HIGH>; /* PD20 */
> +       usb0_vbus-supply = <&reg_usbvbus>;
> +       usb1_vbus-supply = <&reg_vcc>;
> +       status = "okay";
> +};
> --
> 2.35.1
> 

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