Re: [PATCH v3 2/3] PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver

Lorenzo Pieralisi
2021-10-13T13:05:21Z

On Wed, Sep 22, 2021 at 07:00:34AM +0200, Sergio Paracuellos wrote:
> Add driver for the PCIe controller of the MT7621 SoC.
>
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
> ---
> arch/mips/ralink/Kconfig | 3 +-
> drivers/pci/controller/Kconfig | 8 ++
> drivers/pci/controller/Makefile | 1 +
> .../controller}/pci-mt7621.c | 0
> drivers/staging/Kconfig | 2 -
> drivers/staging/Makefile | 1 -
> drivers/staging/mt7621-pci/Kconfig | 8 --
> drivers/staging/mt7621-pci/Makefile | 2 -
> drivers/staging/mt7621-pci/TODO | 4 -
> .../mt7621-pci/mediatek,mt7621-pci.txt | 104 ------------------
> 10 files changed, 11 insertions(+), 122 deletions(-)
> rename drivers/{staging/mt7621-pci => pci/controller}/pci-mt7621.c (100%)
> delete mode 100644 drivers/staging/mt7621-pci/Kconfig
> delete mode 100644 drivers/staging/mt7621-pci/Makefile
> delete mode 100644 drivers/staging/mt7621-pci/TODO
> delete mode 100644 drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
>
> diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
> index c800bf5559b5..120adad51d6a 100644
> --- a/arch/mips/ralink/Kconfig
> +++ b/arch/mips/ralink/Kconfig
> @@ -51,7 +51,8 @@ choice
> select SYS_SUPPORTS_HIGHMEM
> select MIPS_GIC
> select CLKSRC_MIPS_GIC
> - select HAVE_PCI if PCI_MT7621
> + select HAVE_PCI
> + select PCI_DRIVERS_GENERIC
> select SOC_BUS
> endchoice
>
> diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> index 326f7d13024f..b76404be0360 100644
> --- a/drivers/pci/controller/Kconfig
> +++ b/drivers/pci/controller/Kconfig
> @@ -312,6 +312,14 @@ config PCIE_HISI_ERR
> Say Y here if you want error handling support
> for the PCIe controller's errors on HiSilicon HIP SoCs
>
> +config PCI_MT7621
> + tristate "MediaTek MT7621 PCI Controller"
> + depends on (RALINK && SOC_MT7621) || (MIPS && COMPILE_TEST)

- Is there a chance we can remove the MIPS dependency from the
COMPILE_TEST conditional ?
- I am not a big fan of "SOC_XXX" config options dependencies, actually
there is none in pci/controller. Is there a way to remove it ?

Lorenzo

> + select PHY_MT7621_PCI
> + default SOC_MT7621
> + help
> + This selects a driver for the MediaTek MT7621 PCI Controller.
> +
> source "drivers/pci/controller/dwc/Kconfig"
> source "drivers/pci/controller/mobiveil/Kconfig"
> source "drivers/pci/controller/cadence/Kconfig"
> diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
> index aaf30b3dcc14..f42a566353cb 100644
> --- a/drivers/pci/controller/Makefile
> +++ b/drivers/pci/controller/Makefile
> @@ -37,6 +37,7 @@ obj-$(CONFIG_VMD) += vmd.o
> obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
> obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o
> obj-$(CONFIG_PCIE_HISI_ERR) += pcie-hisi-error.o
> +obj-$(CONFIG_PCI_MT7621) += pci-mt7621.o
> # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
> obj-y += dwc/
> obj-y += mobiveil/
> diff --git a/drivers/staging/mt7621-pci/pci-mt7621.c b/drivers/pci/controller/pci-mt7621.c
> similarity index 100%
> rename from drivers/staging/mt7621-pci/pci-mt7621.c
> rename to drivers/pci/controller/pci-mt7621.c
> diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
> index e03627ad4460..59af251e7576 100644
> --- a/drivers/staging/Kconfig
> +++ b/drivers/staging/Kconfig
> @@ -86,8 +86,6 @@ source "drivers/staging/vc04_services/Kconfig"
>
> source "drivers/staging/pi433/Kconfig"
>
> -source "drivers/staging/mt7621-pci/Kconfig"
> -
> source "drivers/staging/mt7621-dma/Kconfig"
>
> source "drivers/staging/ralink-gdma/Kconfig"
> diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
> index c7f8d8d8dd11..76f413470bc8 100644
> --- a/drivers/staging/Makefile
> +++ b/drivers/staging/Makefile
> @@ -33,7 +33,6 @@ obj-$(CONFIG_KS7010) += ks7010/
> obj-$(CONFIG_GREYBUS) += greybus/
> obj-$(CONFIG_BCM2835_VCHIQ) += vc04_services/
> obj-$(CONFIG_PI433) += pi433/
> -obj-$(CONFIG_PCI_MT7621) += mt7621-pci/
> obj-$(CONFIG_SOC_MT7621) += mt7621-dma/
> obj-$(CONFIG_DMA_RALINK) += ralink-gdma/
> obj-$(CONFIG_SOC_MT7621) += mt7621-dts/
> diff --git a/drivers/staging/mt7621-pci/Kconfig b/drivers/staging/mt7621-pci/Kconfig
> deleted file mode 100644
> index ce58042f2f21..000000000000
> --- a/drivers/staging/mt7621-pci/Kconfig
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -# SPDX-License-Identifier: GPL-2.0
> -config PCI_MT7621
> - tristate "MediaTek MT7621 PCI Controller"
> - depends on RALINK
> - select PCI_DRIVERS_GENERIC
> - help
> - This selects a driver for the MediaTek MT7621 PCI Controller.
> -
> diff --git a/drivers/staging/mt7621-pci/Makefile b/drivers/staging/mt7621-pci/Makefile
> deleted file mode 100644
> index f4e651cf7ce3..000000000000
> --- a/drivers/staging/mt7621-pci/Makefile
> +++ /dev/null
> @@ -1,2 +0,0 @@
> -# SPDX-License-Identifier: GPL-2.0
> -obj-$(CONFIG_PCI_MT7621) += pci-mt7621.o
> diff --git a/drivers/staging/mt7621-pci/TODO b/drivers/staging/mt7621-pci/TODO
> deleted file mode 100644
> index d674a9ac85c1..000000000000
> --- a/drivers/staging/mt7621-pci/TODO
> +++ /dev/null
> @@ -1,4 +0,0 @@
> -
> -- general code review and cleanup
> -
> -Cc: NeilBrown <neil@brown.name>
> diff --git a/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt b/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
> deleted file mode 100644
> index 327a68267309..000000000000
> --- a/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
> +++ /dev/null
> @@ -1,104 +0,0 @@
> -MediaTek MT7621 PCIe controller
> -
> -Required properties:
> -- compatible: "mediatek,mt7621-pci"
> -- device_type: Must be "pci"
> -- reg: Base addresses and lengths of the PCIe subsys and root ports.
> -- bus-range: Range of bus numbers associated with this controller.
> -- #address-cells: Address representation for root ports (must be 3)
> -- pinctrl-names : The pin control state names.
> -- pinctrl-0: The "default" pinctrl state.
> -- #size-cells: Size representation for root ports (must be 2)
> -- ranges: Ranges for the PCI memory and I/O regions.
> -- #interrupt-cells: Must be 1
> -- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties.
> - Please refer to the standard PCI bus binding document for a more detailed
> - explanation.
> -- status: either "disabled" or "okay".
> -- resets: Must contain an entry for each entry in reset-names.
> - See ../reset/reset.txt for details.
> -- reset-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of
> - root ports.
> -- clocks: Must contain an entry for each entry in clock-names.
> - See ../clocks/clock-bindings.txt for details.
> -- clock-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of
> - root ports.
> -- reset-gpios: GPIO specs for the reset pins.
> -
> -In addition, the device tree node must have sub-nodes describing each PCIe port
> -interface, having the following mandatory properties:
> -
> -Required properties:
> -- reg: Only the first four bytes are used to refer to the correct bus number
> - and device number.
> -- #address-cells: Must be 3
> -- #size-cells: Must be 2
> -- ranges: Sub-ranges distributed from the PCIe controller node. An empty
> - property is sufficient.
> -- bus-range: Range of bus numbers associated with this port.
> -
> -Example for MT7621:
> -
> - pcie: pcie@1e140000 {
> - compatible = "mediatek,mt7621-pci";
> - reg = <0x1e140000 0x100 /* host-pci bridge registers */
> - 0x1e142000 0x100 /* pcie port 0 RC control registers */
> - 0x1e143000 0x100 /* pcie port 1 RC control registers */
> - 0x1e144000 0x100>; /* pcie port 2 RC control registers */
> -
> - #address-cells = <3>;
> - #size-cells = <2>;
> -
> - pinctrl-names = "default";
> - pinctrl-0 = <&pcie_pins>;
> -
> - device_type = "pci";
> -
> - bus-range = <0 255>;
> - ranges = <
> - 0x02000000 0 0x00000000 0x60000000 0 0x10000000 /* pci memory */
> - 0x01000000 0 0x00000000 0x1e160000 0 0x00010000 /* io space */
> - >;
> -
> - #interrupt-cells = <1>;
> - interrupt-map-mask = <0xF0000 0 0 1>;
> - interrupt-map = <0x10000 0 0 1 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>,
> - <0x20000 0 0 1 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>,
> - <0x30000 0 0 1 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
> -
> - status = "disabled";
> -
> - resets = <&rstctrl 24 &rstctrl 25 &rstctrl 26>;
> - reset-names = "pcie0", "pcie1", "pcie2";
> - clocks = <&clkctrl 24 &clkctrl 25 &clkctrl 26>;
> - clock-names = "pcie0", "pcie1", "pcie2";
> -
> - reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>,
> - <&gpio 8 GPIO_ACTIVE_LOW>,
> - <&gpio 7 GPIO_ACTIVE_LOW>;
> -
> - pcie@0,0 {
> - reg = <0x0000 0 0 0 0>;
> - #address-cells = <3>;
> - #size-cells = <2>;
> - ranges;
> - bus-range = <0x00 0xff>;
> - };
> -
> - pcie@1,0 {
> - reg = <0x0800 0 0 0 0>;
> - #address-cells = <3>;
> - #size-cells = <2>;
> - ranges;
> - bus-range = <0x00 0xff>;
> - };
> -
> - pcie@2,0 {
> - reg = <0x1000 0 0 0 0>;
> - #address-cells = <3>;
> - #size-cells = <2>;
> - ranges;
> - bus-range = <0x00 0xff>;
> - };
> - };
> -
> --
> 2.25.1
>