On Oct 27, 2013, at 11:14 AM, Sebastian Reichel wrote:
> Add device tree support for the spi variant of wl1251
> and document the binding.
>
> Signed-off-by: Sebastian Reichel <[email protected]>
> ---
> .../devicetree/bindings/net/wireless/ti,wl1251.txt | 36 ++++++++++++++++++++++
> drivers/net/wireless/ti/wl1251/spi.c | 23 ++++++++++----
> 2 files changed, 53 insertions(+), 6 deletions(-)
> create mode 100644
> Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
>
> diff --git a/Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
> b/Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
> new file mode 100644
> index 0000000..5f8a154
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt
> @@ -0,0 +1,36 @@
> +* Texas Instruments wl1251 controller
> +
> +The wl1251 chip can be connected via SPI or via SDIO. The linux
> +kernel currently only supports device tree for the SPI variant.
> +
>From the binding I have no idea what this chip actually does, also we don't
>normally reference linux kernel support in bindings specs (so please remove
>it).
However, what would expect the SDIO binding to look like? Or more
specifically, how would you distinguish the SPI vs SDIO binding/connection?
I'm wondering if the compatible should be something like "ti,wl1251-spi" and
than the sdio can be "ti,wl1251-sdio"
> +Required properties:
> +- compatible : Should be "ti,wl1251"
reg is not listed as a required prop.
> +- interrupts : Should contain interrupt line
> +- interrupt-parent : Should be the phandle for the interrupt
> + controller that services interrupts for this device
> +- vio-supply : phandle to regulator providing VIO
> +- power-gpio : GPIO connected to chip's PMEN pin
should be vendor prefixed: ti,power-gpio
> +- For additional required properties on SPI, please consult
> + Documentation/devicetree/bindings/spi/spi-bus.txt
> +
> +Optional properties:
> +- ti,use-eeprom : If found, configuration will be loaded from eeprom.
can you be a bit more specific on what cfg will be loaded. Also, is this
property a boolean, if so how do I know which eeprom the cfg is loaded from (is
it one that is directly connected to the wl1251?
> +
> +Examples:
> +
> +&spi1 {
> + wl1251_spi@0 {
> + compatible = "ti,wl1251";
> +
> + reg = <0>;
> + spi-max-frequency = <48000000>;
> + spi-cpol;
> + spi-cpha;
> +
> + interrupt-parent = <&gpio2>;
> + interrupts = <10 IRQ_TYPE_NONE>; /* gpio line 42 */
> +
> + vio-supply = <&vio>;
> + power-gpio = <&gpio3 23 GPIO_ACTIVE_HIGH>; /* 87 */
> + };
> +};
--
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