linux-kernel - Re: [PATCH 2/2] Documentation: DT bindings for AXM55xx SSP CS

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Date:	Thu, 4 Sep 2014 19:05:40 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Anders Berg <anders.berg@...gotech.com>,
	Mark Brown <broonie@...nel.org>,
	"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] Documentation: DT bindings for AXM55xx SSP CS

I bet Mark and linux-spi are interested in this patch too.

Yours,
Linus Walleij

On Mon, Sep 1, 2014 at 2:53 PM, Anders Berg <anders.berg@...gotech.com> wrote:
> Bindings and documentation for AXM55xx SSP chip select controller.
>
> Signed-off-by: Anders Berg <anders.berg@...gotech.com>
> ---
>  .../devicetree/bindings/gpio/gpio-axxia-sspcs.txt  | 36 ++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt b/Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt
> new file mode 100644
> index 0000000..a64c695
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt
> @@ -0,0 +1,36 @@
> +* Axxia SSP GPIO chip-select driver
> +
> +The Axxia device has a ARM PL022 Prime Cell SSP controller with an extension of
> +five chip select signals that may be controlled by software. This driver
> +exports them as GPIOs.
> +
> +Required properties:
> +
> +  * compatible: should be "lsi,ssp-gpio"
> +  * reg: address of the chip select control register.
> +  * gpio-controller: mark the device as gpio controller
> +  * #gpio-cells: should be 1 and this field specifies the chip select number
> +
> +Example:
> +-------
> +
> +       spics: sspgpio@...0088030 {
> +               compatible = "lsi,ssp-gpio";
> +               #gpio-cells = <1>;
> +               reg = <0x20 0x10088030 0x00 0x4>;
> +               gpio-controller;
> +       };
> +
> +       spi0: ssp@...0088000 {
> +               compatible = "arm,pl022", "arm,primecell";
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               reg = <0x20 0x10088000 0x00 0x1000>;
> +               num-cs = <5>;
> +               cs-gpios = <&spics 0>,
> +                          <&spics 1>,
> +                          <&spics 2>,
> +                          <&spics 3>,
> +                          <&spics 4>;
> +               ...
> +      };
> --
> 1.9.1
>
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