Re: [PATCH v2 1/2] arm64: dts: toshiba: Update SoC and PCIe ranges to reflect hardware behavior

[Frank Li <Frank.li@nxp.com>]

On Tue, Aug 05, 2025 at 10:47:00AM +0900, Nobuhiro Iwamatsu wrote:
> From: Frank Li <Frank.Li@nxp.com>
>
> tmpv7708 trim address bit[31:30] in tmpv7708 before passing to the PCIe
> controller. Since only PCIe controller needs to convert the address range
> 0x40000000 - 0x80000000, add a bus definition, describe the ranges in it,
> and move the PCIe definition.
>
> Prepare for the removal of the driver’s cpu_addr_fixup().
>
> Signed-off-by: Frank Li <Frank.Li@nxp.com>
> Suggested-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> ---
> v2:
>   Update commit message.
>   Fix range.
>   Set true to use_parent_dt_ranges in pcie-visconti.c.
>   move pcie under the dedicated sub-bus.
>
>  arch/arm64/boot/dts/toshiba/tmpv7708.dtsi  | 75 +++++++++++++---------
>  drivers/pci/controller/dwc/pcie-visconti.c |  2 +
>  2 files changed, 47 insertions(+), 30 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi b/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi
> index 39806f0ae5133..b754965a76ca6 100644
> --- a/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi
> +++ b/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi
> @@ -478,37 +478,52 @@ pwm: pwm@241c0000 {
>  			status = "disabled";
>  		};
>
> -		pcie: pcie@28400000 {
> -			compatible = "toshiba,visconti-pcie";
> -			reg = <0x0 0x28400000 0x0 0x00400000>,
> -			      <0x0 0x70000000 0x0 0x10000000>,
> -			      <0x0 0x28050000 0x0 0x00010000>,
> -			      <0x0 0x24200000 0x0 0x00002000>,
> -			      <0x0 0x24162000 0x0 0x00001000>;
> -			reg-names = "dbi", "config", "ulreg", "smu", "mpu";
> -			device_type = "pci";
> -			bus-range = <0x00 0xff>;
> -			num-lanes = <2>;
> -			num-viewport = <8>;
> -
> -			#address-cells = <3>;
> +		pcie_bus: bus@24000000 {
> +			compatible = "simple-bus";
> +			#address-cells = <2>;
>  			#size-cells = <2>;
> -			#interrupt-cells = <1>;
> -			ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000
> -				  0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
> -			interrupts = <GIC_SPI 211 IRQ_TYPE_LEVEL_HIGH>,
> -				     <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi", "intr";
> -			interrupt-map-mask = <0 0 0 7>;
> -			interrupt-map =
> -				<0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> -				 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> -				 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> -				 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> -			max-link-speed = <2>;
> -			clocks = <&extclk100mhz>, <&pismu TMPV770X_CLK_PCIE_MSTR>, <&pismu TMPV770X_CLK_PCIE_AUX>;
> -			clock-names = "ref", "core", "aux";
> -			status = "disabled";
> +			ranges = /* register 1:1 map */
> +				 <0x0 0x24000000 0x0 0x24000000 0x0 0x0C000000>,
> +				 /*
> +				  * bus fabric mask address bit 30 and 31 to 0
> +				  * before send to PCIe controller.
> +				  *
> +				  * PCIe map address 0 to cpu's 0x40000000
> +				  */
> +				 <0x0 0x00000000 0x0 0x40000000 0x0 0x40000000>;
> +
> +			pcie: pcie@28400000 {
> +				compatible = "toshiba,visconti-pcie";
> +				reg = <0x0 0x28400000 0x0 0x00400000>,
> +				      <0x0 0x30000000 0x0 0x10000000>,
> +				      <0x0 0x28050000 0x0 0x00010000>,
> +				      <0x0 0x24200000 0x0 0x00002000>,
> +				      <0x0 0x24162000 0x0 0x00001000>;
> +				reg-names = "dbi", "config", "ulreg", "smu", "mpu";
> +				device_type = "pci";
> +				bus-range = <0x00 0xff>;
> +				num-lanes = <2>;
> +				num-viewport = <8>;
> +
> +				#address-cells = <3>;
> +				#size-cells = <2>;
> +				#interrupt-cells = <1>;
> +				ranges = <0x81000000 0 0x00000000 0 0x00000000 0 0x00010000
> +					  0x82000000 0 0x10000000 0 0x10000000 0 0x20000000>;
> +				interrupts = <GIC_SPI 211 IRQ_TYPE_LEVEL_HIGH>,
> +					     <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +				interrupt-names = "msi", "intr";
> +				interrupt-map-mask = <0 0 0 7>;
> +				interrupt-map =
> +					<0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +					 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +					 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +					 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +				max-link-speed = <2>;
> +				clocks = <&extclk100mhz>, <&pismu TMPV770X_CLK_PCIE_MSTR>, <&pismu TMPV770X_CLK_PCIE_AUX>;
> +				clock-names = "ref", "core", "aux";
> +				status = "disabled";
> +			};
>  		};
>  	};
>  };
> diff --git a/drivers/pci/controller/dwc/pcie-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
> index cdeac6177143c..2a724ab587f78 100644
> --- a/drivers/pci/controller/dwc/pcie-visconti.c
> +++ b/drivers/pci/controller/dwc/pcie-visconti.c
> @@ -310,6 +310,8 @@ static int visconti_pcie_probe(struct platform_device *pdev)
>
>  	platform_set_drvdata(pdev, pcie);
>
> +	pci->use_parent_dt_ranges = true;
> +

This change belong to PATCH 2. It still works with old driver after add
pci-bus in dts, just a warning will print.

Frank

>  	return visconti_add_pcie_port(pcie, pdev);
>  }
>
> --
> 2.49.0
>
>