| Message ID | 20240617071112.3133101-5-jacobe.zang@wesion.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64: dts: Add board support for Khadas Edge2 | expand |
On 17/06/2024 10:11, Jacobe Zang wrote: > Khadas Edge2 uses the PCI-e Ampak AP6275P 2T2R Wi-Fi 6 module. > > Signed-off-by: Jacobe Zang <jacobe.zang@wesion.com> > --- > .../boot/dts/rockchip/rk3588s-khadas-edge2.dts | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts > index 233bab17bffd2..7d7cc3e76838c 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts > @@ -365,6 +365,23 @@ &pcie2x1l2 { > reset-gpios = <&gpio3 RK_PD1 GPIO_ACTIVE_HIGH>; > vpcie3v3-supply = <&vcc3v3_pcie_wl>; > status = "okay"; > + > + pcie@0,0 { > + reg = <0x400000 0 0 0 0>; > + #address-cells = <3>; > + #size-cells = <2>; > + ranges; > + device_type = "pci"; > + bus-range = <0x40 0x4f>; > + > + wifi: wifi@0,0 { > + compatible = "pci14e4,449d"; This doesn't seem to be listed in the bindings, nor is there a mainline driver that would match either this compatible or PCI ID 14e4:449d. Maybe submit either or both of those first, to make sure they are reviewed and acceptable for mainline inclusion, before this change lands in DTS and becomes part of the ABI? I'm also wondering why would adding a DT node for a PCI device be needed in the first place, given that PCI supports device discovery? Does it require some sort of boot-time fixup by the bootloader? If so, it might be helpful to state that in comments. Best regards, Alexey
>I'm also wondering why would adding a DT node for a PCI device be needed >in the first place, given that PCI supports device discovery? In fact, I learn that PCIe bus devices do not need compatible to probe just now... Before sending this patch, I committed the code that added "pci14e4,449d" to vendor-prefix.yaml and net/wireless/brcm,brcm4329-fmac.yaml. Now I know the reason why my addition was rejected. By the way, except for the compatible binding, is there any other binding that I should remove?? --- Best Regards Jacobe
On Mon, Jun 17, 2024 at 2:58 PM Jacobe Zang <jacobe.zang@wesion.com> wrote: > > >I'm also wondering why would adding a DT node for a PCI device be needed > >in the first place, given that PCI supports device discovery? > > In fact, I learn that PCIe bus devices do not need compatible to probe just now... Before sending this patch, I committed the code that added "pci14e4,449d" to vendor-prefix.yaml and net/wireless/brcm,brcm4329-fmac.yaml. Now I know the reason why my addition was rejected. By the way, except for the compatible binding, is there any other binding that I should remove?? If your PCI bridge is functioning properly and if your WiFi adapter is connected and physically enabled (in terms of power and RFKILL) I believe it should be automatically discovered and you should see it in lspci. No additional DT nodes needed - but check if you need any additional DT property somewhere to keep the HYM8563 clock enabled. I'm not sure your pcie@0,0 node is needed either. Then it's up to the driver to recognize your adapter by its PCI ID and attach. I guess you'd need to extend the hardware IDs table in the brcmfmac driver for it to attach - similar to [1] [1] https://github.com/armbian/build/blob/main/patch/kernel/archive/rockchip-rk3588-6.10/0801-wireless-add-bcm43752.patch Best regards, Alexey
Hi, On Mon, Jun 17, 2024 at 03:17:50PM GMT, Alexey Charkov wrote: > On Mon, Jun 17, 2024 at 2:58 PM Jacobe Zang <jacobe.zang@wesion.com> wrote: > > > > >I'm also wondering why would adding a DT node for a PCI device be needed > > >in the first place, given that PCI supports device discovery? > > > > In fact, I learn that PCIe bus devices do not need compatible to probe just now... Before sending this patch, I committed the code that added "pci14e4,449d" to vendor-prefix.yaml and net/wireless/brcm,brcm4329-fmac.yaml. Now I know the reason why my addition was rejected. By the way, except for the compatible binding, is there any other binding that I should remove?? > > If your PCI bridge is functioning properly and if your WiFi adapter is > connected and physically enabled (in terms of power and RFKILL) I > believe it should be automatically discovered and you should see it in > lspci. No additional DT nodes needed - but check if you need any > additional DT property somewhere to keep the HYM8563 clock enabled. > I'm not sure your pcie@0,0 node is needed either. > > Then it's up to the driver to recognize your adapter by its PCI ID and > attach. I guess you'd need to extend the hardware IDs table in the > brcmfmac driver for it to attach - similar to [1] > > [1] https://github.com/armbian/build/blob/main/patch/kernel/archive/rockchip-rk3588-6.10/0801-wireless-add-bcm43752.patch RK3588 EVB1 has the same WLAN/BT module and I started looking into adding support at a low priority. I think this is very similar to the Qualcomm chip Bartosz Golaszewski worked on and thus should get a pwrseq driver, which handles the enable GPIOs, regulators and clocks. If any of them are missing the PCIe device is not discovered. Note, that this will actually require describing the PCIe device in DT to reference the pwrseq device. Additionally the brcmfmac need to be extended to actually have working wlan. I put some links and notes about this here: https://gitlab.collabora.com/hardware-enablement/rockchip-3588/linux/-/issues/1 Greetings, -- Sebastian
> If your PCI bridge is functioning properly and if your WiFi adapter is > connected and physically enabled (in terms of power and RFKILL) I > believe it should be automatically discovered and you should see it in > lspci. I'm sure that wifi@0,0 node is not needed. > I'm not sure your pcie@0,0 node is needed either. I think pcie@0,0 node is useful. I have tried to comment it, after that Wi-Fi works properly but bluetooth can't work. --- Best Regards Jacobe
diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts index 233bab17bffd2..7d7cc3e76838c 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts +++ b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts @@ -365,6 +365,23 @@ &pcie2x1l2 { reset-gpios = <&gpio3 RK_PD1 GPIO_ACTIVE_HIGH>; vpcie3v3-supply = <&vcc3v3_pcie_wl>; status = "okay"; + + pcie@0,0 { + reg = <0x400000 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + ranges; + device_type = "pci"; + bus-range = <0x40 0x4f>; + + wifi: wifi@0,0 { + compatible = "pci14e4,449d"; + reg = <0x410000 0 0 0 0>; + clocks = <&hym8563>; + clock-names = "32k"; + }; + }; + }; &pwm11 {
Khadas Edge2 uses the PCI-e Ampak AP6275P 2T2R Wi-Fi 6 module. Signed-off-by: Jacobe Zang <jacobe.zang@wesion.com> --- .../boot/dts/rockchip/rk3588s-khadas-edge2.dts | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)