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Date: Thu, 5 Aug 2021 11:45:40 +0100
From: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To: Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc: linux-pci@...r.kernel.org,
"open list:MIPS" <linux-mips@...r.kernel.org>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
John Crispin <john@...ozen.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Rob Herring <robh+dt@...nel.org>,
linux-staging@...ts.linux.dev,
Greg KH <gregkh@...uxfoundation.org>,
NeilBrown <neil@...wn.name>,
Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
Pali Rohár <pali@...nel.org>
Subject: Re: [PATCH v2 2/3] PCI: mt7621: Add MediaTek MT7621 PCIe host
controller driver
On Thu, Aug 05, 2021 at 12:40:02PM +0200, Sergio Paracuellos wrote:
> Hi Lorenzo,
>
> On Thu, Aug 5, 2021 at 12:32 PM Lorenzo Pieralisi
> <lorenzo.pieralisi@....com> wrote:
> >
> > On Wed, Jun 09, 2021 at 04:01:58PM +0200, Sergio Paracuellos wrote:
> > > Add driver for the PCIe controller of the MT7621 SoC.
> > >
> > > Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > > Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
> > > ---
> > > arch/mips/ralink/Kconfig | 2 +-
> > > 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, 10 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 ec4daa63c5e3..461e33d20c9c 100644
> > > --- a/arch/mips/ralink/Kconfig
> > > +++ b/arch/mips/ralink/Kconfig
> > > @@ -56,7 +56,7 @@ choice
> > > select MIPS_GIC
> > > select COMMON_CLK
> > > select CLKSRC_MIPS_GIC
> > > - select HAVE_PCI if PCI_MT7621
> > > + select HAVE_PCI
> > > select SOC_BUS
> > > endchoice
> > >
> > > diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> > > index 2f2c8a1729f9..6b006df87884 100644
> > > --- a/drivers/pci/controller/Kconfig
> > > +++ b/drivers/pci/controller/Kconfig
> > > @@ -303,6 +303,14 @@ 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
> > > + bool "MediaTek MT7621 PCI Controller"
> > > + depends on (RALINK && SOC_MT7621) || (MIPS && COMPILE_TEST)
> > > + select PCI_DRIVERS_GENERIC
> >
> > Can this be selected in arch/mips rather than here ?
>
> No real problem for me, but I was suggested by Bjorn and Pali to put
> all the driver inside 'drivers/pci/controller'. Do you mean to move
> all to arch/mips or only the Kconfig part?
Only:
select PCI_DRIVERS_GENERIC
given that's an arch/mips internal.
Thanks,
Lorenzo
>
> Thanks,
> Sergio Paracuellos
>
> >
> > Thanks,
> > Lorenzo
> >
> > > + 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 63e3880a3e87..ac902dc4e1a9 100644
> > > --- a/drivers/pci/controller/Makefile
> > > +++ b/drivers/pci/controller/Makefile
> > > @@ -36,6 +36,7 @@ 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-$(CONFIG_PCI_MT7621) += pci-mt7621.o
> > > # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
> > > obj-y += dwc/
> > > obj-y += mobiveil/
> > > diff --git a/drivers/staging/mt7621-pci/pci-mt7621.c b/drivers/pci/controller/pci-mt7621.c
> > > similarity index 100%
> > > rename from drivers/staging/mt7621-pci/pci-mt7621.c
> > > rename to drivers/pci/controller/pci-mt7621.c
> > > diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
> > > index b7ae5bdc4eb5..9a21d730ab2b 100644
> > > --- a/drivers/staging/Kconfig
> > > +++ b/drivers/staging/Kconfig
> > > @@ -86,8 +86,6 @@ source "drivers/staging/vc04_services/Kconfig"
> > >
> > > source "drivers/staging/pi433/Kconfig"
> > >
> > > -source "drivers/staging/mt7621-pci/Kconfig"
> > > -
> > > source "drivers/staging/mt7621-dma/Kconfig"
> > >
> > > source "drivers/staging/ralink-gdma/Kconfig"
> > > diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
> > > index 075c979bfe7c..b7b4916761d4 100644
> > > --- a/drivers/staging/Makefile
> > > +++ b/drivers/staging/Makefile
> > > @@ -33,7 +33,6 @@ obj-$(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@...wn.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@...40000 {
> > > - 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
> > >
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