linux-kernel - Re: [PATCH v2 2/4] dt-bindings: ARM: Mediatek: Document devicetree bindings for spi bus

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Date:	Sun, 5 Jul 2015 18:55:18 +0200
From:	Jonas Gorski <jogo@...nwrt.org>
To:	Leilk Liu <leilk.liu@...iatek.com>
Cc:	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, linux-spi@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2 2/4] dt-bindings: ARM: Mediatek: Document devicetree
 bindings for spi bus

Hi,

On Mon, Jun 29, 2015 at 3:04 PM, Leilk Liu <leilk.liu@...iatek.com> wrote:
> Signed-off-by: Leilk Liu <leilk.liu@...iatek.com>
> ---
>  .../devicetree/bindings/spi/spi-mt65xx.txt         | 32 ++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/spi/spi-mt65xx.txt
>
> diff --git a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> new file mode 100644
> index 0000000..04c28fd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> @@ -0,0 +1,32 @@
> +MTK SPI device

"SPI device" lets me think "SPI slave device", not "SPI master
controller", so maybe call it "MTK SPI Controller"?

> +
> +Required properties:
> +- compatible: should be one of the following.
> +    - mediatek,mt8173-spi: for mt8173 platforms
> +    - mediatek,mt8135-spi: for mt8135 platforms
> +    - mediatek,mt6589-spi: for mt6589 platforms
> +
> +- reg: Address and length of the register set for the device
> +
> +- interrupts: Should contain spi interrupt
> +
> +- clock-names: tuple listing input clock names.
> +       Required elements: "main"
> +
> +- clocks: phandles to input clocks.
> +
> +- pad-select: should specify spi pad used, only required for MT8173.
> +       This value should be 0~3.

AFAIK device-specific non-generic properties should be
vendor-prefixed, i.e. it should be "mediatek,pad-select", not just
"pad-select".


Regards
Jonas
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