This adds new dt entry ext-fem-name, it is used by ath10k driver to select correct timing parameters and configure it in target wifi hardware. The Front End Module(FEM) normally includes tx power amplifier(PA) and rx low noise amplifier(LNA). The default timing parameters like tx end to PA off timing values were fine tuned for internal FEM used in reference design. And these timing values can not be same if ODM modifies hardware design with different external FEM. This DT entry helps to choose correct timing values in driver if different external FEM hardware used.
Signed-off-by: Bhagavathi Perumal S <[email protected]> --- .../bindings/net/wireless/qcom,ath10k.txt | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt index 7fd4e8c..fbaf309 100644 --- a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt +++ b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt @@ -56,6 +56,7 @@ Optional properties: the length can vary between hw versions. - <supply-name>-supply: handle to the regulator device tree node optional "supply-name" is "vdd-0.8-cx-mx". +- ext-fem-name: name of external front end module used. Example (to supply the calibration data alone): @@ -150,3 +151,24 @@ wifi@18000000 { <0 141 0 /* CE11 */ >; vdd-0.8-cx-mx-supply = <&pm8998_l5>; }; + +Example (to supply the external front end module name): + +In this example, the front end module is defined as a property of the ath10k +device node. + +pci { + pcie@0 { + reg = <0 0 0 0 0>; + #interrupt-cells = <1>; + #size-cells = <2>; + #address-cells = <3>; + device_type = "pci"; + + ath10k@0,0 { + reg = <0 0 0 0 0>; + device_type = "pci"; + ext-fem-name = "microsemi-lx5586"; + }; + }; +}; -- 1.9.1
