linux-kernel - Re: [PATCH 1/3] ahci: st: Update the ahci

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Date:	Mon, 2 Mar 2015 16:59:47 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Peter Griffin <peter.griffin@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	maxime.coquelin@...com, patrice.chotard@...com,
	srinivas.kandagatla@...il.com, tj@...nel.org,
	linux-ide@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] ahci: st: Update the ahci_st DT documentation

On Mon, 02 Mar 2015, Peter Griffin wrote:

> As part of testing ahci_st driver working on stih407 I noticed
> several things wrong in the DT documentation: -
> 
> 1) Compatible string doesn't match the driver code
> 2) pwr-rst reset isn't documented (but exists in the driver)
> 3) some whitespace issues (spaces not tabs)
> 
> Also add in a stih407 family example into the doc.
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> ---
>  Documentation/devicetree/bindings/ata/ahci-st.txt | 45 ++++++++++++++++-------
>  1 file changed, 32 insertions(+), 13 deletions(-)

Acked-by: Lee Jones <lee.jones@...aro.org>

> diff --git a/Documentation/devicetree/bindings/ata/ahci-st.txt b/Documentation/devicetree/bindings/ata/ahci-st.txt
> index 1331202..e1d01df 100644
> --- a/Documentation/devicetree/bindings/ata/ahci-st.txt
> +++ b/Documentation/devicetree/bindings/ata/ahci-st.txt
> @@ -3,29 +3,48 @@ STMicroelectronics STi SATA controller
>  This binding describes a SATA device.
>  
>  Required properties:
> - - compatible	   : Must be "st,sti-ahci"
> + - compatible	   : Must be "st,ahci"
>   - reg		   : Physical base addresses and length of register sets
>   - interrupts	   : Interrupt associated with the SATA device
>   - interrupt-names :   Associated name must be; "hostc"
> - - resets	   : The power-down and soft-reset lines of SATA IP
> - - reset-names	   :   Associated names must be; "pwr-dwn" and "sw-rst"
>   - clocks	   : The phandle for the clock
>   - clock-names	   :   Associated name must be; "ahci_clk"
>   - phys		   : The phandle for the PHY port
>   - phy-names	   :   Associated name must be; "ahci_phy"
>  
> +Optional properties:
> + - resets	   : The power-down, soft-reset and power-reset lines of SATA IP
> + - reset-names	   :   Associated names must be; "pwr-dwn", "sw-rst" and "pwr-rst"
> +
>  Example:
>  
> +	/* Example for stih416 */
>  	sata0: sata@...80000 {
> -		compatible      = "st,sti-ahci";
> -		reg             = <0xfe380000 0x1000>;
> -		interrupts      = <GIC_SPI 157 IRQ_TYPE_NONE>;
> -		interrupt-names = "hostc";
> -		phys	        = <&phy_port0 PHY_TYPE_SATA>;
> -		phy-names       = "ahci_phy";
> -		resets	        = <&powerdown STIH416_SATA0_POWERDOWN>,
> +		compatible	= "st,ahci";
> +		reg		= <0xfe380000 0x1000>;
> +		interrupts	= <GIC_SPI 157 IRQ_TYPE_NONE>;
> +		interrupt-names	= "hostc";
> +		phys		= <&phy_port0 PHY_TYPE_SATA>;
> +		phy-names	= "ahci_phy";
> +		resets		= <&powerdown STIH416_SATA0_POWERDOWN>,
>  				  <&softreset STIH416_SATA0_SOFTRESET>;
> -		reset-names     = "pwr-dwn", "sw-rst";
> -		clocks	        = <&clk_s_a0_ls CLK_ICN_REG>;
> -		clock-names     = "ahci_clk";
> +		reset-names	= "pwr-dwn", "sw-rst";
> +		clocks		= <&clk_s_a0_ls CLK_ICN_REG>;
> +		clock-names	= "ahci_clk";
> +	};
> +
> +	/* Example for stih407 family silicon */
> +	sata0: sata@...0000 {
> +		compatible	= "st,ahci";
> +		reg		= <0x9b20000 0x1000>;
> +		interrupts	= <GIC_SPI 159 IRQ_TYPE_NONE>;
> +		interrupt-names	= "hostc";
> +		phys		= <&phy_port0 PHY_TYPE_SATA>;
> +		phy-names	= "ahci_phy";
> +		resets		= <&powerdown STIH407_SATA0_POWERDOWN>,
> +				  <&softreset STIH407_SATA0_SOFTRESET>,
> +				  <&softreset STIH407_SATA0_PWR_SOFTRESET>;
> +		reset-names	= "pwr-dwn", "sw-rst", "pwr-rst";
> +		clocks		= <&clk_s_c0_flexgen CLK_ICN_REG>;
> +		clock-names	= "ahci_clk";
>  	};

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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