linux-kernel - Re: [PATCH 06/17] Documentation: Define the MOP500 Audio Machine Driver Device Tree bindings

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Date:	Fri, 14 Sep 2012 11:02:57 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Ola Lilja <ola.o.lilja@...ricsson.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	STEricsson_nomadik_linux <STEricsson_nomadik_linux@...t.st.com>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	"arnd@...db.de" <arnd@...db.de>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	Roger NILSSON1 <roger.xr.nilsson@...ricsson.com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
Subject: Re: [PATCH 06/17] Documentation: Define the MOP500 Audio Machine
 Driver Device Tree bindings

On Tue, Sep 11, 2012 at 11:06:00AM +0200, Ola Lilja wrote:
> On 09/10/2012 06:44 PM, Lee Jones wrote:
> 
> > Ola poke.
> > 
> > On Fri, Aug 24, 2012 at 03:01:42PM +0100, Lee Jones wrote:
> >> Here we add the required documentation for the new Device Tree
> >> bindings pertaining to the MOP500 Audio Machine driver.
> >> 
> >> CC: alsa-devel@...a-project.org
> >> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> >> ---
> >>  .../devicetree/bindings/sound/ux500-mop500.txt     |   39 ++++++++++++++++++++
> >>  1 file changed, 39 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/sound/ux500-mop500.txt
> >> 
> >> diff --git a/Documentation/devicetree/bindings/sound/ux500-mop500.txt b/Documentation/devicetree/bindings/sound/ux500-mop500.txt
> >> new file mode 100644
> >> index 0000000..48e071c
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/sound/ux500-mop500.txt
> >> @@ -0,0 +1,39 @@
> >> +* MOP500 Audio Machine Driver
> >> +
> >> +This node is responsible for linking together all ux500 Audio Driver components.
> >> +
> >> +Required properties:
> >> + - compatible              : "stericsson,snd-soc-mop500"
> >> +
> >> +Non-standard properties:
> >> + - stericsson,cpu-dai      : Phandle to the CPU-side DAI
> >> + - stericsson,audio-codec  : Phandle to the Audio CODEC
> >> + - stericsson,card-name    : Over-ride default card name
> >> +
> >> +Example:
> >> +
> >> +	sound {
> >> +		compatible = "stericsson,snd-soc-mop500";
> >> +
> >> +		stericsson,cpu-dai = <&msp1 &msp3>;
> >> +		stericsson,audio-codec = <&codec>;
> >> +	};
> >> +
> >> +	msp1: msp@...24000 {
> >> +		compatible = "stericsson,ux500-msp-i2s";
> >> +		reg = <0x80124000 0x1000>;
> >> +		interrupts = <0 62 0x4>;
> >> +		v-ape-supply = <&db8500_vape_reg>;
> 
> 
> I'm no DT-expert, but why are you adding MSP-stuff in the machine-driver? They
> are also added in the next patch.

This is a documentation file. Duplication is not important, as it's only there
for reference.

> >> +	};
> >> +
> >> +	msp3: msp@...25000 {
> >> +		compatible = "stericsson,ux500-msp-i2s";
> >> +		reg = <0x80125000 0x1000>;
> >> +		interrupts = <0 62 0x4>;
> >> +		v-ape-supply = <&db8500_vape_reg>;
> >> +	};
> >> +
> >> +	codec: ab8500-codec {
> >> +		compatible = "stericsson,ab8500-codec";
> >> +		stericsson,earpeice-cmv = <950>; /* Units in mV. */
> 
> 
> Only four voltages are allowed here. Maybe enumerate them in the comment?

This isn't the ab8500-codec documentation. For valid earpiece values please
see the documentation in patch "Documentation: Add the AB8500 CODEC device
to the MFD AB8500 doc"

Apart from these comments does the patch looks okay?

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