linux-kernel - Re: [PATCH v2 1/2] dt-bindings: i3c: Document MediaTek I3C master bindings

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Message-ID: <20190626182339.0c6301a2@collabora.com>
Date:   Wed, 26 Jun 2019 18:23:39 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Qii Wang <qii.wang@...iatek.com>
Cc:     <bbrezillon@...nel.org>, <matthias.bgg@...il.com>,
        <linux-i3c@...ts.infradead.org>, <gregkh@...uxfoundation.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <leilk.liu@...iatek.com>,
        <liguo.zhang@...iatek.com>, <xinping.qian@...iatek.com>
Subject: Re: [PATCH v2 1/2] dt-bindings: i3c: Document MediaTek I3C master
 bindings

On Wed, 26 Jun 2019 13:36:27 +0800
Qii Wang <qii.wang@...iatek.com> wrote:

> Document MediaTek I3C master DT bindings.
> 
> Signed-off-by: Qii Wang <qii.wang@...iatek.com>
> ---
>  .../devicetree/bindings/i3c/mtk,i3c-master.txt     |   47 ++++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt
> 
> diff --git a/Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt b/Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt
> new file mode 100644
> index 0000000..3fd4f17
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt
> @@ -0,0 +1,47 @@
> +Bindings for MediaTek I3C master block
> +=====================================
> +
> +Required properties:
> +--------------------
> +- compatible: shall be "mediatek,i3c-master"
> +- reg: physical base address of the controller and apdma base, length of
> +  memory mapped region.
> +- reg-names: should be "main" for controller and "dma" for apdma.
> +- interrupts: interrupt number to the cpu.

Depending on the interrupt controller, each interrupt cell might
contain more than just the interrupt number.

> +- clocks: clock name from clock manager.

This property does not contain clock names but clk references.

> +- clock-names: must include "main" and "dma".
> +
> +Mandatory properties defined by the generic binding (see
> +Documentation/devicetree/bindings/i3c/i3c.txt for more details):
> +
> +- #address-cells: shall be set to 3
> +- #size-cells: shall be set to 0
> +
> +Optional properties defined by the generic binding (see
> +Documentation/devicetree/bindings/i3c/i3c.txt for more details):
> +
> +- i2c-scl-hz
> +- i3c-scl-hz
> +
> +I3C device connected on the bus follow the generic description (see
> +Documentation/devicetree/bindings/i3c/i3c.txt for more details).
> +
> +Example:
> +
> +	i3c0: i3c@...0d000 {
> +		compatible = "mediatek,i3c-master";
> +		reg = <0x1100d000 0x100>,
> +		      <0x11000300 0x80>;
> +		reg-names = "main", "dma";
> +		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&i3c0_ck>, <&ap_dma_ck>;
> +		clock-names = "main", "dma";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		i2c-scl-hz = <100000>;
> +
> +		nunchuk: nunchuk@52 {
> +			compatible = "nintendo,nunchuk";
> +			reg = <0x52 0x80000010 0>;

reg is wrong here, should be

			reg = <0x52 0x0 0x10>;

While at it, can you send a patch to fix the example in the cadence
binding doc?

> +		};
> +	};