59 lines
2.8 KiB
Plaintext
59 lines
2.8 KiB
Plaintext
|
* Qualcomm ConNectivity SubSystem Platform Driver
|
||
|
|
|
||
|
|
This platform driver adds support for the CNSS subsystem used for PCIe
|
||
|
|
based Wi-Fi devices. It also adds support to integrate PCIe WLAN module
|
||
|
|
to subsystem restart framework. Apart from that, it also manages the
|
||
|
|
3.3V voltage regulator, WLAN Enable GPIO signal and PCIe link dynamically
|
||
|
|
with support for suspend and resume by retaining the PCI config space
|
||
|
|
states when PCIe link is shutdown. The main purpose of this device tree
|
||
|
|
entry below is to invoke the CNSS platform driver and provide handle to
|
||
|
|
the WLAN enable GPIO, 3.3V fixed voltage regulator resources. It also
|
||
|
|
provides the reserved RAM dump memory location and size.
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible: "qcom,cnss"
|
||
|
|
- wlan-en-gpio: WLAN_EN GPIO signal specified by QCA6174 specifications
|
||
|
|
- vdd-wlan-supply: phandle to the regulator device tree node
|
||
|
|
- pinctrl-names: Names corresponding to the numbered pinctrl states
|
||
|
|
- pinctrl-<n>: Pinctrl states as described in
|
||
|
|
bindings/pinctrl/pinctrl-bindings.txt
|
||
|
|
- qcom,wlan-rc-num: PCIe root complex number which WLAN chip is attached to
|
||
|
|
|
||
|
|
Optional properties:
|
||
|
|
- qcom,notify-modem-status: Boolean property to decide whether modem
|
||
|
|
notification should be enabled or not in this platform
|
||
|
|
- wlan-soc-swreg-supply: phandle to the external 1.15V regulator for QCA6174
|
||
|
|
- wlan-ant-switch-supply: phandle to the 2.7V regulator for the antenna
|
||
|
|
switch of QCA6174
|
||
|
|
- qcom,wlan-uart-access: Boolean property to decide whether QCA6174
|
||
|
|
has exclusive access to UART.
|
||
|
|
- vdd-wlan-io-supply: phandle to the 1.8V IO regulator for QCA6174
|
||
|
|
- vdd-wlan-xtal-supply: phandle to the 1.8V XTAL regulator for QCA6174
|
||
|
|
- vdd-wlan-core-supply: phandle to the 1.3V CORE regulator for QCA6174
|
||
|
|
- vdd-wlan-sp2t-supply: phandle to the 2.7V SP2T regulator for QCA6174
|
||
|
|
- qcom,wlan-smmu-iova-address: I/O virtual address range as <start length>
|
||
|
|
format to be used for allocations associated between WLAN/PCIe and SMMU
|
||
|
|
- qcom,wlan-ramdump-dynamic: To enable CNSS RAMDUMP collection
|
||
|
|
by providing the size of CNSS DUMP
|
||
|
|
- reg: Memory regions defined as starting address and size
|
||
|
|
- reg-names: Names of the memory regions defined in reg entry
|
||
|
|
- wlan-bootstrap-gpio: WLAN_BOOTSTRAP GPIO signal specified by QCA6174
|
||
|
|
which should be drived depending on platforms
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
qcom,cnss@0d400000 {
|
||
|
|
compatible = "qcom,cnss";
|
||
|
|
reg = <0x0d400000 0x200000>;
|
||
|
|
reg-names = "ramdump";
|
||
|
|
qcom,wlan-ramdump-dynamic = <0x200000>;
|
||
|
|
wlan-en-gpio = <&msmgpio 82 0>;
|
||
|
|
vdd-wlan-supply = <&wlan_vreg>;
|
||
|
|
qcom,notify-modem-status;
|
||
|
|
wlan-soc-swreg-supply = <&pma8084_l27>;
|
||
|
|
pinctrl-names = "default";
|
||
|
|
pinctrl-0 = <&cnss_default>;
|
||
|
|
qcom,wlan-rc-num = <0>;
|
||
|
|
qcom,wlan-smmu-iova-address = <0 0x10000000>;
|
||
|
|
};
|