On Tue, Jun 21, 2016 at 12:02:06PM +0000, Reizer, Eyal wrote:
> Add support for using with both wl12xx and wl18xx.
>
> - all wilink family needs special init command for entering wspi mode.
> extra clock cycles should be sent after the spi init command while the
> cs pin is high.
> - Use inverted chip select for sending a dummy 4 bytes command that
> completes the init stage and puts the wilink chip into wspi mode.
>
> Signed-off-by: Eyal Reizer <eyalr@xxxxxx>
> ---
> v1->v2:update device tree bindings configuration
> v2->v3:revert from manual gpio manipulation. use inverted chip select instead
> for sending the extra init cycle, which achieves the same hardware purpose.
> update device tree bindings docucmentation accordingly
>
> .../bindings/net/wireless/ti,wlcore,spi.txt | 47 ++++++--
> drivers/net/wireless/ti/wlcore/spi.c | 124 +++++++++++++++++----
> 2 files changed, 145 insertions(+), 26 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt b/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt
> index 9180724..35467cf 100644
> --- a/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt
> +++ b/Documentation/devicetree/bindings/net/wireless/ti,wlcore,spi.txt
> @@ -1,19 +1,30 @@
> -* Texas Instruments wl1271 wireless lan controller
> +* Texas Instruments wl12xx/wl18xx wireless lan controller
>
> -The wl1271 chip can be connected via SPI or via SDIO. This
> +The wl12xx/wl18xx chips can be connected via SPI or via SDIO. This
> document describes the binding for the SPI connected chip.
>
> Required properties:
> -- compatible : Should be "ti,wl1271"
> +- compatible : Should be one of the following:
> + * "ti,wl1271"
> + * "ti,wl1273"
> + * "ti,wl1281"
> + * "ti,wl1283"
> + * "ti,wl1801"
> + * "ti,wl1805"
> + * "ti,wl1807"
> + * "ti,wl1831"
> + * "ti,wl1835"
> + * "ti,wl1837"
> - reg : Chip select address of device
> - spi-max-frequency : Maximum SPI clocking speed of device in Hz
> -- ref-clock-frequency : Reference clock frequency
> - interrupt-parent, interrupts :
> Should contain parameters for 1 interrupt line.
> Interrupt parameters: parent, line number, type.
> -- vwlan-supply : Point the node of the regulator that powers/enable the wl1271 chip
> +- vwlan-supply : Point the node of the regulator that powers/enable the
> + wl12xx/wl18xx chip
>
> Optional properties:
> +- ref-clock-frequency : Reference clock frequency (should be set for wl12xx)
> - clock-xtal : boolean, clock is generated from XTAL
>
> - Please consult Documentation/devicetree/bindings/spi/spi-bus.txt
> @@ -21,10 +32,15 @@ Optional properties:
>
> Examples:
>
> +For wl12xx family:
> &spi1 {
> - wl1271@1 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&spi1_pins>;
> + #address-cells = <1>;
> + #size-cells = <0>;
None of this is really relevant to this binding.
> + wlcore: wlcore@0 {
Now your unit-address and reg value don't match.
> compatible = "ti,wl1271";
> -
> reg = <1>;
> spi-max-frequency = <48000000>;
> clock-xtal;
> @@ -34,3 +50,20 @@ Examples:
> vwlan-supply = <&vwlan_fixed>;
> };
> };
> +
> +For wl18xx family:
> +&spi0 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&spi0_pins>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + wlcore: wlcore@0 {
> + compatible = "ti,wl1835";
> + vwlan-supply = <&wlan_en_reg>;
> + spi-max-frequency = <48000000>;
> + reg = <0>;
> + interrupt-parent = <&gpio0>;
> + interrupts = <27 IRQ_TYPE_EDGE_RISING>;
> + };
> +};
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