| Message ID | 201404080141.21605.sergei.shtylyov@cogentembedded.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Tue, Apr 08, 2014 at 01:41:20AM +0400, Sergei Shtylyov wrote: > From: Ben Dooks <ben.dooks@codethink.co.uk> > > Add device tree probing support to the 'pci-rcar-gen2' driver. > > Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> > [Sergei: numerous fixes/cleanups] > Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> I'm OK with this, but it needs an ack from Simon. > --- > The patch is against the 'next' branch of Bjorn Helgaas' 'pci.git' repo. > > Changes in version 3: > - added "renesas,pci-r8a7791" to the possible "compatible" property values; > - removed '#ifdef CONFIG_OF' around rcar_pci_of_match[] and hence of_match_ptr() > invocation too; > - fixed trailing whitespace in the DT parsing code; > - removed the wrong "renessas," prefix from the binding document's file name; > - moved the PCI device sub-nodes from the board example to the SoC example; > - fixed labels in the board example; > - fixed grammar and punctuation in the binding document; > - reworded the changelog, fixed the subject. > > Changes in version 2: > - merged the binding document from a separate patch; > - moved to the "bus-range" property parsing; > - added example to the binding document. > > Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt | 54 ++++++++++++++++ > drivers/pci/host/pci-rcar-gen2.c | 32 ++++++++- > 2 files changed, 84 insertions(+), 2 deletions(-) > > Index: pci/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt > =================================================================== > --- /dev/null > +++ pci/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt > @@ -0,0 +1,54 @@ > +Renesas AHB to PCI bridge > +------------------------- > + > +This is the bridge used internally to connect the USB controllers to the > +AHB. There is one bridge instance per USB port connected to the internal > +OHCI and EHCI controllers. > + > +Required properties: > +- compatible: "renesas,pci-r8a7790" for the R8A7790 SoC; > + "renesas,pci-r8a7791" for the R8A7791 SoC. > +- reg: A list of physical regions to access the device: the first is > + the operational registers for the OHCI/EHCI controllers and the > + second is for the bridge configuration and control registers. > +- interrupts: interrupt for the device. > +- clocks: The reference to the device clock. > +- bus-range: The PCI bus number range; as this is a single bus, the range > + should be specified as the same value twice. > + > +Example SoC configuration: > + > + pci0: pci@ee090000 { > + compatible = "renesas,pci-r8a7790"; > + clocks = <&mstp7_clks R8A7790_CLK_EHCI>; > + reg = <0x0 0xee090000 0x0 0xc00>, > + <0x0 0xee080000 0x0 0x1100>; > + interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>; > + status = "disabled"; > + > + bus-range = <0 0>; > + #address-cells = <3>; > + #size-cells = <2>; > + > + pci@0,1 { > + reg = <0x800 0 0 0 0>; > + device_type = "pci"; > + phys = <&usbphy 0 0>; > + phy-names = "usb"; > + }; > + > + pci@0,2 { > + reg = <0x1000 0 0 0 0>; > + device_type = "pci"; > + phys = <&usbphy 0 0>; > + phy-names = "usb"; > + }; > + }; > + > +Example board setup: > + > +&pci0 { > + status = "okay"; > + pinctrl-0 = <&usb0_pins>; > + pinctrl-names = "default"; > +}; > Index: pci/drivers/pci/host/pci-rcar-gen2.c > =================================================================== > --- pci.orig/drivers/pci/host/pci-rcar-gen2.c > +++ pci/drivers/pci/host/pci-rcar-gen2.c > @@ -16,6 +16,7 @@ > #include <linux/kernel.h> > #include <linux/module.h> > #include <linux/pci.h> > +#include <linux/of_pci.h> > #include <linux/platform_device.h> > #include <linux/pm_runtime.h> > #include <linux/sizes.h> > @@ -98,6 +99,7 @@ struct rcar_pci_priv { > struct resource io_res; > struct resource mem_res; > struct resource *cfg_res; > + unsigned busnr; > int irq; > unsigned long window_size; > }; > @@ -312,8 +314,8 @@ static int rcar_pci_setup(int nr, struct > pci_add_resource(&sys->resources, &priv->io_res); > pci_add_resource(&sys->resources, &priv->mem_res); > > - /* Setup bus number based on platform device id */ > - sys->busnr = to_platform_device(priv->dev)->id; > + /* Setup bus number based on platform device id / of bus-range */ > + sys->busnr = priv->busnr; > return 1; > } > > @@ -366,6 +368,23 @@ static int rcar_pci_probe(struct platfor > > priv->window_size = SZ_1G; > > + if (pdev->dev.of_node) { > + struct resource busnr; > + int ret; > + > + ret = of_pci_parse_bus_range(pdev->dev.of_node, &busnr); > + if (ret < 0) { > + dev_err(&pdev->dev, "failed to parse bus-range\n"); > + return ret; > + } > + > + priv->busnr = busnr.start; > + if (busnr.end != busnr.start) > + dev_warn(&pdev->dev, "only one bus number supported\n"); > + } else { > + priv->busnr = pdev->id; > + } > + > hw_private[0] = priv; > memset(&hw, 0, sizeof(hw)); > hw.nr_controllers = ARRAY_SIZE(hw_private); > @@ -377,11 +396,20 @@ static int rcar_pci_probe(struct platfor > return 0; > } > > +static struct of_device_id rcar_pci_of_match[] = { > + { .compatible = "renesas,pci-r8a7790", }, > + { .compatible = "renesas,pci-r8a7791", }, > + { }, > +}; > + > +MODULE_DEVICE_TABLE(of, rcar_pci_of_match); > + > static struct platform_driver rcar_pci_driver = { > .driver = { > .name = "pci-rcar-gen2", > .owner = THIS_MODULE, > .suppress_bind_attrs = true, > + .of_match_table = rcar_pci_of_match, > }, > .probe = rcar_pci_probe, > }; -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Friday 25 April 2014 11:45:35 Bjorn Helgaas wrote: > > +This is the bridge used internally to connect the USB controllers to the > > +AHB. There is one bridge instance per USB port connected to the internal > > +OHCI and EHCI controllers. > > + > > +Required properties: > > +- compatible: "renesas,pci-r8a7790" for the R8A7790 SoC; > > + "renesas,pci-r8a7791" for the R8A7791 SoC. > > +- reg: A list of physical regions to access the device: the first is > > + the operational registers for the OHCI/EHCI controllers and the > > + second is for the bridge configuration and control registers. > > +- interrupts: interrupt for the device. > > +- clocks: The reference to the device clock. > > +- bus-range: The PCI bus number range; as this is a single bus, the range > > + should be specified as the same value twice. Actually, this doesn't conform to the generic PCI binding, which requires a number of additional properties. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Index: pci/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt =================================================================== --- /dev/null +++ pci/Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt @@ -0,0 +1,54 @@ +Renesas AHB to PCI bridge +------------------------- + +This is the bridge used internally to connect the USB controllers to the +AHB. There is one bridge instance per USB port connected to the internal +OHCI and EHCI controllers. + +Required properties: +- compatible: "renesas,pci-r8a7790" for the R8A7790 SoC; + "renesas,pci-r8a7791" for the R8A7791 SoC. +- reg: A list of physical regions to access the device: the first is + the operational registers for the OHCI/EHCI controllers and the + second is for the bridge configuration and control registers. +- interrupts: interrupt for the device. +- clocks: The reference to the device clock. +- bus-range: The PCI bus number range; as this is a single bus, the range + should be specified as the same value twice. + +Example SoC configuration: + + pci0: pci@ee090000 { + compatible = "renesas,pci-r8a7790"; + clocks = <&mstp7_clks R8A7790_CLK_EHCI>; + reg = <0x0 0xee090000 0x0 0xc00>, + <0x0 0xee080000 0x0 0x1100>; + interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>; + status = "disabled"; + + bus-range = <0 0>; + #address-cells = <3>; + #size-cells = <2>; + + pci@0,1 { + reg = <0x800 0 0 0 0>; + device_type = "pci"; + phys = <&usbphy 0 0>; + phy-names = "usb"; + }; + + pci@0,2 { + reg = <0x1000 0 0 0 0>; + device_type = "pci"; + phys = <&usbphy 0 0>; + phy-names = "usb"; + }; + }; + +Example board setup: + +&pci0 { + status = "okay"; + pinctrl-0 = <&usb0_pins>; + pinctrl-names = "default"; +}; Index: pci/drivers/pci/host/pci-rcar-gen2.c =================================================================== --- pci.orig/drivers/pci/host/pci-rcar-gen2.c +++ pci/drivers/pci/host/pci-rcar-gen2.c @@ -16,6 +16,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/of_pci.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/sizes.h> @@ -98,6 +99,7 @@ struct rcar_pci_priv { struct resource io_res; struct resource mem_res; struct resource *cfg_res; + unsigned busnr; int irq; unsigned long window_size; }; @@ -312,8 +314,8 @@ static int rcar_pci_setup(int nr, struct pci_add_resource(&sys->resources, &priv->io_res); pci_add_resource(&sys->resources, &priv->mem_res); - /* Setup bus number based on platform device id */ - sys->busnr = to_platform_device(priv->dev)->id; + /* Setup bus number based on platform device id / of bus-range */ + sys->busnr = priv->busnr; return 1; } @@ -366,6 +368,23 @@ static int rcar_pci_probe(struct platfor priv->window_size = SZ_1G; + if (pdev->dev.of_node) { + struct resource busnr; + int ret; + + ret = of_pci_parse_bus_range(pdev->dev.of_node, &busnr); + if (ret < 0) { + dev_err(&pdev->dev, "failed to parse bus-range\n"); + return ret; + } + + priv->busnr = busnr.start; + if (busnr.end != busnr.start) + dev_warn(&pdev->dev, "only one bus number supported\n"); + } else { + priv->busnr = pdev->id; + } + hw_private[0] = priv; memset(&hw, 0, sizeof(hw)); hw.nr_controllers = ARRAY_SIZE(hw_private); @@ -377,11 +396,20 @@ static int rcar_pci_probe(struct platfor return 0; } +static struct of_device_id rcar_pci_of_match[] = { + { .compatible = "renesas,pci-r8a7790", }, + { .compatible = "renesas,pci-r8a7791", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, rcar_pci_of_match); + static struct platform_driver rcar_pci_driver = { .driver = { .name = "pci-rcar-gen2", .owner = THIS_MODULE, .suppress_bind_attrs = true, + .of_match_table = rcar_pci_of_match, }, .probe = rcar_pci_probe, };