linux-kernel - Re: [PATCH v2 2/4] arm64: dts: mediatek: Add device-tree for MT8195 Demo board

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Message-ID: <20220328144107.ed4xwzuiezzixqrx@radium>
Date:   Mon, 28 Mar 2022 16:41:07 +0200
From:   Fabien Parent <fparent@...libre.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] arm64: dts: mediatek: Add device-tree for MT8195
 Demo board

On Mon, Mar 28, 2022 at 03:47:09PM +0200, AngeloGioacchino Del Regno wrote:
> Il 27/03/22 22:03, Fabien Parent ha scritto:
> > Add basic device-tree for the MT8195 Demo board. The
> > Demo board is made by MediaTek and has a MT8195 SoC,
> > associated with the MT6359 and MT6360 PMICs, and
> > the MT7921 connectivity chip.
> > 
> > The IOs available on that board are:
> > * 1 USB Type-C connector with DP aux mode support
> > * 1 USB Type-A connector
> > * 1 full size HDMI RX and 1 full size HDMI TX connector
> > * 1 uSD slot
> > * 40 pins header
> > * SPI interface header
> > * 1 M.2 slot
> > * 1 audio jack
> > * 1 micro-USB port for serial debug
> > * 2 connectors for DSI displays
> > * 3 connectors for CSI cameras
> > * 1 connector for a eDP panel
> > * 1 MMC storage
> > 
> > This commit adds basic support in order to be able to boot.
> > 
> > Signed-off-by: Fabien Parent <fparent@...libre.com>
> > ---
> > v2:
> >   * remove empty i2c nodes
> >   * remove empty spi node
> >   * remove unused pcie pinctrls
> >   * fixup node nodes to not contains underscore
> >   * rename mt6360 pmic node
> >   * move mmc1 node right after mmc0 node
> >   * use generic node name for gpio-keys
> >   * uniformize pinctrl node names
> > 
> >   arch/arm64/boot/dts/mediatek/Makefile        |   1 +
> >   arch/arm64/boot/dts/mediatek/mt8195-demo.dts | 447 +++++++++++++++++++
> >   2 files changed, 448 insertions(+)
> >   create mode 100644 arch/arm64/boot/dts/mediatek/mt8195-demo.dts
> > 
> 
> ..snip..
> 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8195-demo.dts b/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
> > new file mode 100644
> > index 000000000000..d94b4e01159a
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
> > @@ -0,0 +1,447 @@
> 
> ..snip..
> 
> > +
> > +	gpio-keys {
> > +		compatible = "gpio-keys";
> > +		input-name = "gpio-keys";
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&gpio_keys_pins>;
> > +
> > +		key-0 {
> 
> key-volup is more descriptive, can you please change that?

Which review should I follow, yours or the one from Krzysztof? Because both reviews are contradictory

> 
> > +			gpios = <&pio 106 GPIO_ACTIVE_LOW>;
> > +			label = "volume_up";
> > +			linux,code = <KEY_VOLUMEUP>;
> > +			wakeup-source;
> > +			debounce-interval = <15>;
> > +		};
> > +	};
> > +};
> > +
> 
> ..snip..
> 
> > +
> > +&pmic {
> > +	interrupt-parent = <&pio>;
> > +	interrupts = <222 IRQ_TYPE_LEVEL_HIGH>;
> 
> I would instead use interrupts-extended here:
> 
> 	interrupts-extended = <&pio 222 IRQ_TYPE_LEVEL_HIGH>;

Thanks, it will be fixed in v3.

> 
> > +};
> > +
> > +&i2c6 {
> > +	clock-frequency = <400000>;
> > +	pinctrl-0 = <&i2c6_pins>;
> > +	pinctrl-names = "default";
> > +	status = "okay";
> > +
> > +	mt6360: pmic@34 {
> > +		compatible = "mediatek,mt6360";
> > +		reg = <0x34>;
> > +		interrupt-controller;
> > +		interrupt-parent = <&pio>;
> > +		interrupts = <101 IRQ_TYPE_EDGE_FALLING>;
> 
> Same here

Thanks, it will be fixed in v3.

> 
> > +		interrupt-names = "IRQB";
> > +
> 
> ...snip...
> 
> > +
> > +&pio {
> > +	mmc0_default_pins: mmc0-default-pins {
> > +		pins-cmd-dat {
> > +			pinmux = <PINMUX_GPIO126__FUNC_MSDC0_DAT0>,
> > +				 <PINMUX_GPIO125__FUNC_MSDC0_DAT1>,
> > +				 <PINMUX_GPIO124__FUNC_MSDC0_DAT2>,
> > +				 <PINMUX_GPIO123__FUNC_MSDC0_DAT3>,
> > +				 <PINMUX_GPIO119__FUNC_MSDC0_DAT4>,
> > +				 <PINMUX_GPIO118__FUNC_MSDC0_DAT5>,
> > +				 <PINMUX_GPIO117__FUNC_MSDC0_DAT6>,
> > +				 <PINMUX_GPIO116__FUNC_MSDC0_DAT7>,
> > +				 <PINMUX_GPIO121__FUNC_MSDC0_CMD>;
> > +			input-enable;
> > +			drive-strength = <MTK_DRIVE_6mA>;
> > +			bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
> > +		};
> > +
> > +		pin-clk {
> 
> This is supposed to be "pins-clk", not "pin-clk"... same for all the other
> instances of the "pin-".

There is only one pin in that node, so it should be singular, no?

> 
> Before pushing patches upstream, please run dtbs_check, as these are all
> mistakes that will be pointed out by that.
> 
> Regards,
> Angelo
> 

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