On Tue, Sep 06, 2016 at 11:46:21PM +0200, Martin Blumenstingl wrote:
> Add documentation how devicetree can be used to configure ath9k based
> devices.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumensti...@googlemail.com>
> ---
>  .../devicetree/bindings/net/wireless/qca,ath9k.txt | 39 
> ++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
>  create mode 100644 
> Documentation/devicetree/bindings/net/wireless/qca,ath9k.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/wireless/qca,ath9k.txt 
> b/Documentation/devicetree/bindings/net/wireless/qca,ath9k.txt
> new file mode 100644
> index 0000000..77b9202
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/wireless/qca,ath9k.txt
> @@ -0,0 +1,39 @@
> +* Qualcomm Atheros ath9k wireless devices
> +
> +This node provides properties for configuring the ath9k wireless device. The
> +node is expected to be specified as a child node of the PCI controller to
> +which the wireless chip is connected.
> +
> +Required properties:
> +- compatible: For PCI and PCIe devices this should be an identifier following
> +             the format as defined in "PCI Bus Binding to Open Firmware"
> +             Revision 2.1. One of the possible formats is "pciVVVV,DDDD"
> +             where VVVV is the PCI vendor ID and DDDD is PCI device ID.
> +
> +Optional properties:
> +- reg: Address and length of the register set for the device.

reg is not optional.

> +- qca,clk-25mhz: Defines that a 25MHz clock is used
> +- qca,no-eeprom: Indicates that there is no physical EEPROM connected to the
> +                     ath9k wireless chip (in this case the calibration /
> +                     EEPROM data will be loaded from userspace using the
> +                     kernel firmware loader).
> +- qca,disable-2ghz: Overrides the settings from the EEPROM and disables the
> +                     2.4GHz band. Setting this property is only needed
> +                     when the RF circuit does not support the 2.4GHz band
> +                     while it is enabled nevertheless in the EEPROM.
> +- qca,disable-5ghz: Overrides the settings from the EEPROM and disables the
> +                     5GHz band. Setting this property is only needed when
> +                     the RF circuit does not support the 5GHz band while
> +                     it is enabled nevertheless in the EEPROM.
> +- mac-address: See ethernet.txt in the parent directory
> +- local-mac-address: See ethernet.txt in the parent directory
> +
> +
> +In this example, the node is defined as child node of the PCI controller:
> +&pci0 {
> +     ath9k@168c,002d {

unit address is not the vendor/device ID, but the reg value. So 
'@7000,0,0' I think in this case. Double check the OF PCI bus binding.


> +             compatible = "pci168c,002d";
> +             reg = <0x7000 0 0 0 0x1000>;
> +             qca,disable-5ghz;
> +     };
> +};
> -- 
> 2.9.3
> 

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