1. Patchew
  2. linux
  3. [PATCH 0/9] Add platform supports to MediaTek MT8188 SoC (part 2)
  4. View patch

[PATCH 2/9] arm64: dts: mediatek: mt8188: Add PCIe nodes

Fei Shao posted 9 patches 1 year, 4 months ago
There is a newer version of this series
[PATCH 2/9] arm64: dts: mediatek: mt8188: Add PCIe nodes
Posted by Fei Shao 1 year, 4 months ago 
Add PCIe node and the associated PHY node.
Individual board device tree should enable the nodes as needed.

Signed-off-by: Fei Shao <fshao@chromium.org>
---

 arch/arm64/boot/dts/mediatek/mt8188.dtsi | 62 ++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
index 10195a4e4e9d..9431f3c5c228 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
@@ -1763,6 +1763,53 @@ xhci0: usb@112b0000 {
 			status = "disabled";
 		};
 
+		pcie: pcie@112f0000 {
+			compatible = "mediatek,mt8188-pcie", "mediatek,mt8192-pcie";
+			reg = <0 0x112f0000 0 0x2000>;
+			reg-names = "pcie-mac";
+			ranges = <0x82000000 0 0x20000000 0 0x20000000 0 0x4000000>;
+			bus-range = <0 0xff>;
+			device_type = "pci";
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			clocks = <&infracfg_ao CLK_INFRA_AO_PCIE_PL_P_250M_P0>,
+				 <&infracfg_ao CLK_INFRA_AO_PCIE_TL_26M>,
+				 <&infracfg_ao CLK_INFRA_AO_PCIE_TL_96M>,
+				 <&infracfg_ao CLK_INFRA_AO_PCIE_TL_32K>,
+				 <&infracfg_ao CLK_INFRA_AO_PCIE_PERI_26M>,
+				 <&pericfg_ao CLK_PERI_AO_PCIE_P0_FMEM>;
+			clock-names = "pl_250m", "tl_26m", "tl_96m", "tl_32k",
+				      "peri_26m", "peri_mem";
+
+			#interrupt-cells = <1>;
+			interrupts = <GIC_SPI 791 IRQ_TYPE_LEVEL_HIGH 0>;
+			interrupt-map = <0 0 0 1 &pcie_intc 0>,
+					<0 0 0 2 &pcie_intc 1>,
+					<0 0 0 3 &pcie_intc 2>,
+					<0 0 0 4 &pcie_intc 3>;
+			interrupt-map-mask = <0 0 0 7>;
+
+			iommu-map = <0 &infra_iommu IFR_IOMMU_PORT_PCIE_0 0xffff>;
+			iommu-map-mask = <0>;
+
+			phys = <&pcieport PHY_TYPE_PCIE>;
+			phy-names = "pcie-phy";
+
+			power-domains = <&spm MT8188_POWER_DOMAIN_PEXTP_MAC_P0>;
+
+			resets = <&watchdog MT8188_TOPRGU_PCIE_SW_RST>;
+			reset-names = "mac";
+
+			status = "disabled";
+
+			pcie_intc: interrupt-controller {
+				#address-cells = <0>;
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
 		nor_flash: spi@1132c000 {
 			compatible = "mediatek,mt8188-nor", "mediatek,mt8186-nor";
 			reg = <0 0x1132c000 0 0x1000>;
@@ -1775,6 +1822,21 @@ nor_flash: spi@1132c000 {
 			status = "disabled";
 		};
 
+		pciephy: t-phy@11c20700 {
+			compatible = "mediatek,mt8188-tphy", "mediatek,generic-tphy-v3";
+			ranges = <0 0 0x11c20700 0x700>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			status = "disabled";
+
+			pcieport: pcie-phy@0 {
+				reg = <0 0x700>;
+				clocks = <&topckgen CLK_TOP_CFGREG_F_PCIE_PHY_REF>;
+				clock-names = "ref";
+				#phy-cells = <1>;
+			};
+		};
+
 		i2c1: i2c@11e00000 {
 			compatible = "mediatek,mt8188-i2c";
 			reg = <0 0x11e00000 0 0x1000>,
-- 
2.46.1.824.gd892dcdcdd-goog
Re: [PATCH 2/9] arm64: dts: mediatek: mt8188: Add PCIe nodes
Posted by Macpaul Lin 1 year, 4 months ago 

On 10/2/24 19:41, Fei Shao wrote:
> 	
> 
> External email : Please do not click links or open attachments until you 
> have verified the sender or the content.
> 
> 
> Add PCIe node and the associated PHY node.
> Individual board device tree should enable the nodes as needed.
> 
> Signed-off-by: Fei Shao <fshao@chromium.org>
> ---
> 
>   arch/arm64/boot/dts/mediatek/mt8188.dtsi | 62 ++++++++++++++++++++++++
>   1 file changed, 62 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> index 10195a4e4e9d..9431f3c5c228 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> @@ -1763,6 +1763,53 @@ xhci0: usb@112b0000 {
>   			status = "disabled";
>   		};
>   
> +		pcie: pcie@112f0000 {
> +			compatible = "mediatek,mt8188-pcie", "mediatek,mt8192-pcie";
> +			reg = <0 0x112f0000 0 0x2000>;
> +			reg-names = "pcie-mac";

It seems the property 'linux,pci-domain = <0>;' is missing?

[snip]

> +			};
> +		};
> +
>   		nor_flash: spi@1132c000 {
>   			compatible = "mediatek,mt8188-nor", "mediatek,mt8186-nor";
>   			reg = <0 0x1132c000 0 0x1000>;
> @@ -1775,6 +1822,21 @@ nor_flash: spi@1132c000 {
>   			status = "disabled";
>   		};
>   
> +		pciephy: t-phy@11c20700 {
> +			compatible = "mediatek,mt8188-tphy", "mediatek,generic-tphy-v3";
> +			ranges = <0 0 0x11c20700 0x700>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			status = "disabled";
> +

The power-domains property is missing.
It should be 'power-domains = <&spm MT8188_POWER_DOMAIN_PEXTP_PHY_TOP>;'

> +			pcieport: pcie-phy@0 {
> +				reg = <0 0x700>;
> +				clocks = <&topckgen CLK_TOP_CFGREG_F_PCIE_PHY_REF>;
> +				clock-names = "ref";
> +				#phy-cells = <1>;
> +			};
> +		};
> +
>   		i2c1: i2c@11e00000 {
>   			compatible = "mediatek,mt8188-i2c";
>   			reg = <0 0x11e00000 0 0x1000>,

Thanks!
Best regards,
Macpaul Lin
Re: [PATCH 2/9] arm64: dts: mediatek: mt8188: Add PCIe nodes
Posted by Fei Shao 1 year, 4 months ago 
On Wed, Oct 2, 2024 at 8:42 PM Macpaul Lin <macpaul.lin@mediatek.com> wrote:
>
>
>
> On 10/2/24 19:41, Fei Shao wrote:
> >
> >
> > External email : Please do not click links or open attachments until you
> > have verified the sender or the content.
> >
> >
> > Add PCIe node and the associated PHY node.
> > Individual board device tree should enable the nodes as needed.
> >
> > Signed-off-by: Fei Shao <fshao@chromium.org>
> > ---
> >
> >   arch/arm64/boot/dts/mediatek/mt8188.dtsi | 62 ++++++++++++++++++++++++
> >   1 file changed, 62 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> > index 10195a4e4e9d..9431f3c5c228 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> > @@ -1763,6 +1763,53 @@ xhci0: usb@112b0000 {
> >                       status = "disabled";
> >               };
> >
> > +             pcie: pcie@112f0000 {
> > +                     compatible = "mediatek,mt8188-pcie", "mediatek,mt8192-pcie";
> > +                     reg = <0 0x112f0000 0 0x2000>;
> > +                     reg-names = "pcie-mac";
>
> It seems the property 'linux,pci-domain = <0>;' is missing?

I'll add that. I guess the fallback will assign a dynamic ID to it
(likely also 0), but explicitly having a static domain ID is never a
bad thing.

>
> [snip]
>
> > +                     };
> > +             };
> > +
> >               nor_flash: spi@1132c000 {
> >                       compatible = "mediatek,mt8188-nor", "mediatek,mt8186-nor";
> >                       reg = <0 0x1132c000 0 0x1000>;
> > @@ -1775,6 +1822,21 @@ nor_flash: spi@1132c000 {
> >                       status = "disabled";
> >               };
> >
> > +             pciephy: t-phy@11c20700 {
> > +                     compatible = "mediatek,mt8188-tphy", "mediatek,generic-tphy-v3";
> > +                     ranges = <0 0 0x11c20700 0x700>;
> > +                     #address-cells = <1>;
> > +                     #size-cells = <1>;
> > +                     status = "disabled";
> > +
>
> The power-domains property is missing.
> It should be 'power-domains = <&spm MT8188_POWER_DOMAIN_PEXTP_PHY_TOP>;'

I dropped this as the binding check was against it, and I thought it
was a mistake because other tphy nodes don't seem to have a power
domain either.
And now I noticed your tphy binding patch in [1] so that explains,
except that I still can't tell whether there should be a power domain
for a given tphy node...

Anyway, I'll fix this one. Thanks!

[1]: https://lore.kernel.org/all/20240926101804.22471-1-macpaul.lin@mediatek.com/

Regards,
Fei


>
> > +                     pcieport: pcie-phy@0 {
> > +                             reg = <0 0x700>;
> > +                             clocks = <&topckgen CLK_TOP_CFGREG_F_PCIE_PHY_REF>;
> > +                             clock-names = "ref";
> > +                             #phy-cells = <1>;
> > +                     };
> > +             };
> > +
> >               i2c1: i2c@11e00000 {
> >                       compatible = "mediatek,mt8188-i2c";
> >                       reg = <0 0x11e00000 0 0x1000>,
>
> Thanks!
> Best regards,
> Macpaul Lin

Patchew 2.1-devel-b67e4c2

© 2016 - 2026 Red Hat, Inc.