linux-kernel - Re: [PATCH 01/11] ARM: dt: Add SPI CS on Samsung Snow board.

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Date:	Thu, 4 Jun 2015 08:52:30 +0200
From:	Javier Martinez Canillas <javier@...hile0.org>
To:	Michal Suchanek <hramrach@...il.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Han Xu <han.xu@...escale.com>, Mark Brown <broonie@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Marek Vasut <marex@...x.de>,
	Rafał Miłecki <zajec5@...il.com>,
	Alison Chaiken <alison_chaiken@...tor.com>,
	Huang Shijie <b32955@...escale.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	Knut Wohlrab <knut.wohlrab@...bosch.com>,
	Bean Huo 霍斌斌 (beanhuo) 
	<beanhuo@...ron.com>, "grmoore@...era.com" <grmoore@...era.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, dmaengine@...r.kernel.org,
	linux-mtd@...ts.infradead.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH 01/11] ARM: dt: Add SPI CS on Samsung Snow board.

Hello Michal,

On Wed, Jun 3, 2015 at 11:26 PM, Michal Suchanek <hramrach@...il.com> wrote:
> Although there is only one choice of chipselect it is necessary to
> specify it. The driver cannot claim the gpio otherwise.
>
> Signed-off-by: Michal Suchanek <hramrach@...il.com>
> ---
>  arch/arm/boot/dts/exynos5250-snow.dts | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
> index 1eca97e..1fa72cf 100644
> --- a/arch/arm/boot/dts/exynos5250-snow.dts
> +++ b/arch/arm/boot/dts/exynos5250-snow.dts
> @@ -687,9 +687,10 @@
>  };
>
>  &spi_1 {
> -       status = "okay";
>         samsung,spi-src-clk = <0>;
>         num-cs = <1>;
> +       cs-gpios = <&gpa2 5 0>;
> +       status = "okay";

Why are you changing the position of the status property? AFAIK the
convention is to have this property at the beginning of the device
node.

Best regards,
Javier
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