linux-kernel - Re: [PATCH 1/2] documentation: add rockchip spi documentation

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Date:	Tue, 24 Jun 2014 11:18:02 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	addy ke <addy.ke@...k-chips.com>
Cc:	"broonie@...nel.org" <broonie@...nel.org>,
	"heiko@...ech.de" <heiko@...ech.de>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"huangtao@...k-chips.com" <huangtao@...k-chips.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"yzq@...k-chips.com" <yzq@...k-chips.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
	"kever.yang@...k-chips.com" <kever.yang@...k-chips.com>,
	"zyw@...k-chips.com" <zyw@...k-chips.com>,
	"xjq@...k-chips.com" <xjq@...k-chips.com>,
	"zhenfu.fang@...k-chips.com" <zhenfu.fang@...k-chips.com>,
	"olof@...om.net" <olof@...om.net>,
	"cf@...k-chips.com" <cf@...k-chips.com>,
	"hj@...k-chips.com" <hj@...k-chips.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] documentation: add rockchip spi documentation

On Tue, Jun 24, 2014 at 04:58:43AM +0100, addy ke wrote:
> Signed-off-by: addy ke <addy.ke@...k-chips.com>
> ---
>  .../devicetree/bindings/spi/spi-rockchip.txt       | 51 ++++++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/spi/spi-rockchip.txt
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi-rockchip.txt b/Documentation/devicetree/bindings/spi/spi-rockchip.txt
> new file mode 100644
> index 0000000..ce9c881
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/spi-rockchip.txt
> @@ -0,0 +1,51 @@
> +* Rockchip SPI Controller
> +
> +The Rockchip SPI controller is used to interface with various devices such as flash
> +and display controllers using the SPI communication interface.
> +
> +Required SoC Specific Properties:
> +
> +- compatible: should be one of the following.
> +    - rockchip,rk3066-spi: for rk3066, rk3188 and rk3288 platforms.

Are you sure you don't want specifc strings for rk3188 and rk3288 (in
addtion to the common "rockchip,rk3066-spi")?

> +- reg: physical base address of the controller and length of memory mapped
> +       region.
> +- interrupts: The interrupt number to the cpu. The interrupt specifier format
> +              depends on the interrupt controller.
> +- clocks: Must contain an entry for each entry in clock-names.
> +- clock-names: Shall be "spiclk" for the transfer-clock, and "apb_pclk" for
> +			   the peripheral clock.
> +
> +Optional properties:
> +- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
> +		Documentation/devicetree/bindings/dma/dma.txt
> +- dma-names: DMA request names should include "tx" and "rx" if present.
> +
> +Example:
> +
> +- SoC Specific Portion:
> +
> +	spi0: spi@...10000 {
> +		compatible = "rockchip,rockchip-spi";

This does not match the description of the compatible property.

> +		reg = <0xff110000 0x1000>;
> +		dmas = <&pdma1 11>, <&pdma1 12>;
> +		dma-names = "tx", "rx";
> +		#address-cells = <1>;
> +		#size-cells = <0>;

These weren't mentioned.

> +		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&spi0_clk &spi0_tx &spi0_rx &spi0_cs0 &spi0_cs1>;

pinctrl was not mentioned.

> +		clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;
> +		clock-names = "spiclk", "apb_pclk";
> +		status = "disabled";

Any reason for the status?

> +	};
> +
> +- Board Specific Portion:
> +
> +	&spi0 {
> +		status = "okay";
> +		spi_test@00 {
> +			compatible = "rockchip,spi_test";

Huh?

Mark.
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