Re: [PATCH v4 14/19] arm64: dts: mediatek: asurada: Enable PCIe and add WiFi
From: Bjorn Helgaas <helgaas@kernel.org>
Date: 2025-01-03 21:14:48
Also in:
linux-devicetree, linux-mediatek, lkml
On Wed, Jun 29, 2022 at 11:59:51AM -0400, Nícolas F. R. A. Prado wrote:
Enable MT8192's PCIe controller and add support for the MT7921e WiFi card that is present on that bus for the Asurada platform.
+&pcie {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pcie_pins>;
+
+ pcie0: pcie@0,0 {
+ device_type = "pci";
+ reg = <0x0000 0 0 0 0>;
+ num-lanes = <1>;
+ bus-range = <0x1 0x1>;Hi Nícolas, what's the purpose of this bus-range? IIUC this describes a Root Port, where we can read and configure the secondary/subordinate bus numbers from the RP config space, so it seems like we don't need to describe them here.
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ ranges;
+
+ wifi: wifi@0,0 {
+ reg = <0x10000 0 0 0 0x100000>,
+ <0x10000 0 0x100000 0 0x100000>;
+ memory-region = <&wifi_restricted_dma_region>;
+ };
+ };
+};