linux-kernel - Re: [PATCH v2 1/2] ARM: dts: sun7i: Add Iteaduino Plus A20

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Message-ID: <9730f21c-fd8e-9583-98c7-e5d923269f79@sholland.org>
Date:   Wed, 27 Sep 2023 16:19:55 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Julian Ribbeck <julian.ribbeck@....de>
Cc:     conor+dt@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        linux-sunxi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        krzysztof.kozlowski@...aro.org
Subject: Re: [PATCH v2 1/2] ARM: dts: sun7i: Add Iteaduino Plus A20

Hi Julian,

Next time please CC everyone reported by scripts/get_maintainer.pl on
this file, so we are aware of your patch.

On 6/17/23 15:55, Julian Ribbeck wrote:
> Iteaduino Plus A20 is very similar to Iteaduino Plus A10. In fact it
> shares the same breakout board and the Itead Core A20 on top of it, is
> only adapted to support the dual-core A20.
> 
> This commits enables the following hardware:
> 
> * HDMI Video output
> * USB
> * SATA (untested due to lack of hardware I could attach)
> * Ethernet
> * MMC storage
> * UART
> * USB OTG (untested, because I don't own an USB OTG cable/device)
> 
> Signed-off-by: Julian Ribbeck <julian.ribbeck@....de>
> ---
>  arch/arm/boot/dts/Makefile                    |   1 +
>  .../dts/sun7i-a20-itead-iteaduino-plus.dts    | 114 ++++++++++++++++++
>  2 files changed, 115 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sun7i-a20-itead-iteaduino-plus.dts
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 59829fc90315..3b6e284e4472 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -1334,6 +1334,7 @@ dtb-$(CONFIG_MACH_SUN7I) += \
>  	sun7i-a20-haoyu-marsboard.dtb \
>  	sun7i-a20-hummingbird.dtb \
>  	sun7i-a20-itead-ibox.dtb \
> +	sun7i-a20-itead-iteaduino-plus.dtb \
>  	sun7i-a20-i12-tvbox.dtb \
>  	sun7i-a20-icnova-swac.dtb \
>  	sun7i-a20-lamobo-r1.dtb \
> diff --git a/arch/arm/boot/dts/sun7i-a20-itead-iteaduino-plus.dts b/arch/arm/boot/dts/sun7i-a20-itead-iteaduino-plus.dts
> new file mode 100644

ARM devicetrees were moved into subdirectories, so this patch will need
to be rebased.

> index 000000000000..204c5f2c81c7
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun7i-a20-itead-iteaduino-plus.dts
> @@ -0,0 +1,114 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +
> +/dts-v1/;
> +#include "sun7i-a20.dtsi"
> +#include "sunxi-itead-core-common.dtsi"
> +#include "axp209.dtsi"

axp209.dtsi is already included by sunxi-itead-core-common.dtsi. You
don't need to include it again here.

> +
> +/ {
> +	model = "Itead Iteaduino Plus A20";
> +	compatible = "itead,iteaduino-plus-a20", "allwinner,sun7i-a20";
> +
> +	hdmi-connector {
> +		compatible = "hdmi-connector";
> +		type = "a";
> +
> +		port {
> +			hdmi_con_in: endpoint {
> +				remote-endpoint = <&hdmi_out_con>;
> +			};
> +		};
> +	};
> +};
> +
> +&ac_power_supply {
> +	status = "okay";
> +};
> +
> +&ahci {
> +	target-supply = <&reg_ahci_5v>;
> +	status = "okay";
> +};
> +
> +&axp209 {
> +	interrupt-parent = <&nmi_intc>;
> +	interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +};
> +
> +&battery_power_supply {
> +	status = "okay";
> +};
> +
> +&codec {
> +	stauts = "okay";
> +};
> +
> +&de {
> +	status = "okay";
> +};
> +
> +&emac {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&emac_pa_pins>;
> +	phy-handle = <&phy1>;
> +	status = "okay";
> +};
> +
> +&emac_sram {
> +	status = "okay";
> +};
> +
> +&hdmi {
> +	status = "okay";
> +};
> +
> +&hdmi_out {
> +	hdmi_out_con: endpoint {
> +		remote-endpoint = <&hdmi_con_in>;
> +	};
> +};
> +
> +&mdio {
> +	status = "okay";
> +
> +	phy1: ethernet-phy@1 {
> +		reg = <1>;
> +	};
> +};
> +
> +&mmc0 {
> +	vmmc-supply = <&reg_vcc3v3>;
> +	bus-width = <4>;
> +	cd-gpios = <&pio 7 1 GPIO_ACTIVE_LOW>; /* PH1 */
> +	status = "okay";
> +};
> +
> +
> +&otg_sram {
> +	status = "okay";
> +};
> +
> +&reg_ahci_5v {
> +	status = "okay";
> +};
> +
> +

Extra blank line here and above otg_sram.

> +&reg_usb0_vbus {
> +	status = "okay";
> +};
> +
> +&usb_otg {
> +	status = "okay";
> +	dr_mode = "otg";

The mini-USB port is always powered, and the ID pin isn't hooked up in a
usable way, so this should be "host".

> +};
> +
> +&usb_power_supply {
> +	status = "okay";
> +};

The board's power supply is only connected to the ACIN pins of the
AXP209, not the USBVBUS pin (which is pulled to 3.3V for some reason).
So usb_power_supply should not be enabled or used below.

> +
> +&usbphy {
> +	usb0_id_det-gpios = <&pio 7 4 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>; /* PH4 */

The ID pin is connected to N_VBUSEN on the PMIC, not this GPIO. Per the
schematic, this GPIO is not connected to anything.

> +	usb0_vbus_det-gpios = <&pio 7 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>; /* PH5 */

Per the schematic, this GPIO is not connected to anything.

> +	usb0_vbus_power-supply = <&usb_power_supply>;

As explained above, please remove this property.

Regards,
Samuel

> +	usb0_vbus-supply = <&reg_usb0_vbus>;
> +};
> --
> 2.41.0
>