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Message-ID: <AS8PR04MB8676DA6A04D76F10FFDE81B28C799@AS8PR04MB8676.eurprd04.prod.outlook.com>
Date: Tue, 30 Aug 2022 02:58:51 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: Lucas Stach <l.stach@...gutronix.de>,
"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"robh@...nel.org" <robh@...nel.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"vkoul@...nel.org" <vkoul@...nel.org>,
"alexander.stein@...tq-group.com" <alexander.stein@...tq-group.com>,
"marex@...x.de" <marex@...x.de>,
"richard.leitner@...ux.dev" <richard.leitner@...ux.dev>
CC: "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH v4 4/6] arm64: dts: imx8mp: Add iMX8MP PCIe support
> -----Original Message-----
> From: Lucas Stach <l.stach@...gutronix.de>
> Sent: 2022年8月29日 23:23
> To: Hongxing Zhu <hongxing.zhu@....com>; p.zabel@...gutronix.de;
> bhelgaas@...gle.com; lorenzo.pieralisi@....com; robh@...nel.org;
> shawnguo@...nel.org; vkoul@...nel.org; alexander.stein@...tq-group.com;
> marex@...x.de; richard.leitner@...ux.dev
> Cc: linux-phy@...ts.infradead.org; devicetree@...r.kernel.org;
> linux-pci@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; kernel@...gutronix.de; dl-linux-imx
> <linux-imx@....com>
> Subject: Re: [PATCH v4 4/6] arm64: dts: imx8mp: Add iMX8MP PCIe support
>
> Am Montag, dem 29.08.2022 um 16:15 +0800 schrieb Richard Zhu:
> > Add i.MX8MP PCIe support.
> >
> > Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> > Tested-by: Marek Vasut <marex@...x.de>
> > Tested-by: Richard Leitner <richard.leitner@...data.com>
> > Tested-by: Alexander Stein <alexander.stein@...tq-group.com>
> > ---
> > arch/arm64/boot/dts/freescale/imx8mp.dtsi | 46
> > ++++++++++++++++++++++-
> > 1 file changed, 45 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > index fe178b7d063c..d11f079fd1f3 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > @@ -5,6 +5,7 @@
> >
> > #include <dt-bindings/clock/imx8mp-clock.h>
> > #include <dt-bindings/power/imx8mp-power.h>
> > +#include <dt-bindings/reset/imx8mp-reset.h>
> > #include <dt-bindings/gpio/gpio.h>
> > #include <dt-bindings/input/input.h>
> > #include <dt-bindings/interrupt-controller/arm-gic.h>
> > @@ -410,7 +411,8 @@ iomuxc: pinctrl@...30000 {
> > };
> >
> > gpr: iomuxc-gpr@...40000 {
> > - compatible = "fsl,imx8mp-iomuxc-gpr", "syscon";
> > + compatible = "fsl,imx8mp-iomuxc-gpr",
> > + "fsl,imx6q-iomuxc-gpr", "syscon";
>
> I don't like this part. The iomux GPR in the i.MX8M* is not really compatible
> with the i.MX6Q, so I think it's a pretty bad idea to claim it is. Why can't we
> have this syscon looked up by phandle, like we discussed in some early version
> of the i.MX8MM patchset? Sorry, for not catching this on the 8MM submission,
> I was pretty busy back then.
Okay, got that. Thanks.
Would be changed, and fetch the gpr regmap by phandle in v5 later.
Best Regards
Richard Zhu
>
> Regards,
> Lucas
>
> > reg = <0x30340000 0x10000>;
> > };
> >
> > @@ -1084,6 +1086,17 @@ media_blk_ctrl: blk-ctrl@...c0000 {
> > #power-domain-cells = <1>;
> > };
> >
> > + pcie_phy: pcie-phy@...00000 {
> > + compatible = "fsl,imx8mp-pcie-phy";
> > + reg = <0x32f00000 0x10000>;
> > + resets = <&src IMX8MP_RESET_PCIEPHY>,
> > + <&src IMX8MP_RESET_PCIEPHY_PERST>;
> > + reset-names = "pciephy", "perst";
> > + power-domains = <&hsio_blk_ctrl
> IMX8MP_HSIOBLK_PD_PCIE_PHY>;
> > + #phy-cells = <0>;
> > + status = "disabled";
> > + };
> > +
> > hsio_blk_ctrl: blk-ctrl@...10000 {
> > compatible = "fsl,imx8mp-hsio-blk-ctrl", "syscon";
> > reg = <0x32f10000 0x24>;
> > @@ -1099,6 +1112,37 @@ hsio_blk_ctrl: blk-ctrl@...10000 {
> > };
> > };
> >
> > + pcie: pcie@...00000 {
> > + compatible = "fsl,imx8mp-pcie";
> > + reg = <0x33800000 0x400000>, <0x1ff00000 0x80000>;
> > + reg-names = "dbi", "config";
> > + #address-cells = <3>;
> > + #size-cells = <2>;
> > + device_type = "pci";
> > + bus-range = <0x00 0xff>;
> > + ranges = <0x81000000 0 0x00000000 0x1ff80000 0
> 0x00010000>, /* downstream I/O 64KB */
> > + <0x82000000 0 0x18000000 0x18000000 0
> 0x07f00000>; /* non-prefetchable memory */
> > + num-lanes = <1>;
> > + num-viewport = <4>;
> > + interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
> > + interrupt-names = "msi";
> > + #interrupt-cells = <1>;
> > + interrupt-map-mask = <0 0 0 0x7>;
> > + interrupt-map = <0 0 0 1 &gic GIC_SPI 126
> IRQ_TYPE_LEVEL_HIGH>,
> > + <0 0 0 2 &gic GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
> > + <0 0 0 3 &gic GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
> > + <0 0 0 4 &gic GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
> > + fsl,max-link-speed = <3>;
> > + linux,pci-domain = <0>;
> > + power-domains = <&hsio_blk_ctrl IMX8MP_HSIOBLK_PD_PCIE>;
> > + resets = <&src IMX8MP_RESET_PCIE_CTRL_APPS_EN>,
> > + <&src IMX8MP_RESET_PCIE_CTRL_APPS_TURNOFF>;
> > + reset-names = "apps", "turnoff";
> > + phys = <&pcie_phy>;
> > + phy-names = "pcie-phy";
> > + status = "disabled";
> > + };
> > +
> > gpu3d: gpu@...00000 {
> > compatible = "vivante,gc";
> > reg = <0x38000000 0x8000>;
>
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