linux-kernel - Re: [PATCH 06/13] ASoC: ux500_pcm: Extend ux500 MSP binding for enumeration

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Message-ID: <20131106120758.GG30901@lee--X1>
Date:	Wed, 6 Nov 2013 12:07:58 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Mark Brown <broonie@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 06/13] ASoC: ux500_pcm: Extend ux500 MSP binding for
 enumeration

On Wed, 06 Nov 2013, Linus Walleij wrote:

> On Wed, Nov 6, 2013 at 11:46 AM, Mark Brown <broonie@...nel.org> wrote:
> > On Wed, Nov 06, 2013 at 10:16:18AM +0000, Lee Jones wrote:
> 
> >> + - id               : MSP ID - used during component registration
> >
> > I have no idea what this means or how one would pick the number?  It
> > looks like something purely internal to the driver...
> 
> Actually it's quite common when we have several HW blocks of the
> same thing to add something like an id. For example for different
> GPIO banks.
> 
> But in this case I guess it may make more sense to flag one MSP
> for RX and one for TX or something?
> 
> There are also two more such MSPs for streaming audio to the
> Bluetooth audio portions.

Right, we have 4 of them:

MSP0: Tx and Rx
MSP1: Tx
MSP2: Tx and Rx
MSP3: Rx

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