linux-kernel - Re: [PATCH v4 3/5] dt/bindings: bcm2835: add binding documentation for bcm2835-aux

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Date:	Wed, 16 Sep 2015 07:25:51 +0200
From:	Martin Sperl <kernel@...tin.sperl.org>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Lee Jones <lee@...nel.org>, Russell King <linux@....linux.org.uk>,
	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-spi@...r.kernel.org,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v4 3/5] dt/bindings: bcm2835: add binding documentation for bcm2835-aux


> On 16.09.2015, at 06:12, Stephen Warren <swarren@...dotorg.org> wrote:
> 
> On 09/04/2015 01:26 AM, Martin Sperl wrote:
>> 
>>> On 26.08.2015, at 03:44, Stephen Warren <swarren@...dotorg.org> wrote:
>>> 
>>> On 08/24/2015 02:40 AM, kernel@...tin.sperl.org wrote:
>>> 
>>>> +Example:
>>>> +
>>>> +aux_enable: aux_enable@...e215004 {
>>>> +	compatible = "bcrm,bcm2835-aux";
>>>> +	reg = <0x7e215004 0x04>;
>>> 
>>> I'd expect that to be <0x7e215000 0x8>;
>> 
>> The reason is that we just handle enable with this driver,
>> which just requires access to the 0x7e215004 register.
>> 
>> The 0x7e215000 register (interrupt mask) could be used by a
>> cascaded interrupt-controller, but as the spi and uart drivers
>> can run with shared interrupts this is not a necessity.
> 
> The DT is supposed to describe the HW, not any particular SW's use of
> the HW. If the HW block has 2 registers, so must the DT reg property.

Please look at V6 of the patch-series, that uses Erics clock-patch.
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