linux-kernel - Re: [PATCH v2] spi: mediatek: single device does not require cs

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Date:	Tue, 17 Nov 2015 11:49:14 +0100
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	lei liu <leilk.liu@...iatek.com>,
	Nicolas Boichat <drinkcat@...omium.org>
Cc:	Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2] spi: mediatek: single device does not require cs_gpios



On 14/11/15 03:27, lei liu wrote:
> On Mon, 2015-11-09 at 12:14 +0800, Nicolas Boichat wrote:
>> When only one device is present, it is not necessary to specify
>> cs_gpios, as the CS line can be controlled by the hardware
>> module.
>>
>> Without this patch, older device tree bindings used before
>> 37457607 "spi: mediatek: mt8173 spi multiple devices support"
>> would cause a panic on boot. This fixes the crash, and
>> re-introduces backward compatibility.
>>
>> Signed-off-by: Nicolas Boichat <drinkcat@...omium.org>
>
> Acked-by: Leilk Liu <leilk.liu@...iatek.com>
>

Please make sure this fix get applied to v4.3 as well.

Thanks,
Matthias
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