Add documentation how devicetree can be used to configure ath9k based
devices.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/net/wireless/qca,ath9k.txt | 59 ++++++++++++++++++++++
1 file changed, 59 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..7c62c59
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/qca,ath9k.txt
@@ -0,0 +1,59 @@
+* 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: Should be "qca,ath9k"
+
+Optional properties:
+- reg: Address and length of the register set for the device.
+- 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,check-eeprom-endianness: When enabled, the driver checks if the
+ endianness of the EEPROM (based on the two
+ magic bytes at the start of the EEPROM)
+ matches the host system's native endianness.
+ The data will be swapped accordingly if there
+ is a mismatch.
+ Leaving this disabled means that the EEPROM
+ data will be interpreted in the system's
+ native endianness, regardless of the magic
+ bytes.
+ Enable this option only when the magic bytes
+ are known to indicate the correct endianness
+ of the EEPROM data, because otherwise the
+ EEPROM data may be swapped and thus may be
+ parsed incorrectly.
+- 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.
+
+pci {
+ pcie@0 {
+ reg = <0 0 0 0 0>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ device_type = "pci";
+
+ ath9k@0,0 {
+ compatible = "qca,ath9k";
+ reg = <0 0 0 0 0>;
+ qca,disable-5ghz;
+ };
+ };
+};
--
2.9.0
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