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of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code.

Browse source 
Several architectures open code effectively the same code block for
finding and mapping PCI irqs. This patch consolidates it down to a
single function.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Grant Likely 2013-09-19 16:44:55 -05:00
parent f7578496a6
commit 16b84e5a50
7 changed files with 31 additions and 67 deletions
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17
arch/arm/mach-integrator/pci_v3.c
View file

@ -835,21 +835,6 @@ static struct hw_pci pci_v3 __initdata = {
#ifdef CONFIG_OF
static int __init pci_v3_map_irq_dt(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct of_phandle_args oirq;
int ret;
ret = of_irq_parse_pci(dev, &oirq);
if (ret) {
dev_err(&dev->dev, "of_irq_parse_pci() %d\n", ret);
/* Proper return code 0 == NO_IRQ */
return 0;
}
return irq_create_of_mapping(&oirq);
}
static int __init pci_v3_dtprobe(struct platform_device *pdev,
struct device_node *np)
{
@ -918,7 +903,7 @@ static int __init pci_v3_dtprobe(struct platform_device *pdev,
return -EINVAL;
}
pci_v3.map_irq = pci_v3_map_irq_dt;
pci_v3.map_irq = of_irq_parse_and_map_pci;
pci_common_init_dev(&pdev->dev, &pci_v3);
return 0;

12
arch/mips/pci/fixup-lantiq.c
View file

@ -25,15 +25,5 @@ int pcibios_plat_dev_init(struct pci_dev *dev)
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct of_phandle_args dev_irq;
int irq;
if (of_irq_parse_pci(dev, &dev_irq)) {
dev_err(&dev->dev, "trying to map irq for unknown slot:%d pin:%d\n",
slot, pin);
return 0;
}
irq = irq_create_of_mapping(&dev_irq);
dev_info(&dev->dev, "SLOT:%d PIN:%d IRQ:%d\n", slot, pin, irq);
return irq;
return of_irq_parse_and_map_pci(dev, slot, pin);
}

22
arch/mips/pci/pci-rt3883.c
View file

@ -583,27 +583,7 @@ static int rt3883_pci_probe(struct platform_device *pdev)
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct of_phandle_args dev_irq;
int err;
int irq;
err = of_irq_parse_pci(dev, &dev_irq);
if (err) {
pr_err("pci %s: unable to get irq map, err=%d\n",
pci_name((struct pci_dev *) dev), err);
return 0;
}
irq = irq_create_of_mapping(&dev_irq);
if (irq == 0)
pr_crit("pci %s: no irq found for pin %u\n",
pci_name((struct pci_dev *) dev), pin);
else
pr_info("pci %s: using irq %d for pin %u\n",
pci_name((struct pci_dev *) dev), irq, pin);
return irq;
return of_irq_parse_and_map_pci(dev, slot, pin);
}
int pcibios_plat_dev_init(struct pci_dev *dev)

7
arch/x86/kernel/devicetree.c
View file

@ -105,7 +105,6 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
static int x86_of_pci_irq_enable(struct pci_dev *dev)
{
struct of_phandle_args oirq;
u32 virq;
int ret;
u8 pin;
@ -116,11 +115,7 @@ static int x86_of_pci_irq_enable(struct pci_dev *dev)
if (!pin)
return 0;
ret = of_irq_parse_pci(dev, &oirq);
if (ret)
return ret;
virq = irq_create_of_mapping(&oirq);
virq = of_irq_parse_and_map_pci(dev, 0, 0);
if (virq == 0)
return -EINVAL;
dev->irq = virq;

25
drivers/of/of_pci_irq.c
View file

@ -94,3 +94,28 @@ int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq
return of_irq_parse_raw(laddr, out_irq);
}
EXPORT_SYMBOL_GPL(of_irq_parse_pci);
/**
* of_irq_parse_and_map_pci() - Decode a PCI irq from the device tree and map to a virq
* @dev: The pci device needing an irq
* @slot: PCI slot number; passed when used as map_irq callback. Unused
* @pin: PCI irq pin number; passed when used as map_irq callback. Unused
*
* @slot and @pin are unused, but included in the function so that this
* function can be used directly as the map_irq callback to pci_fixup_irqs().
*/
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct of_phandle_args oirq;
int ret;
ret = of_irq_parse_pci(dev, &oirq);
if (ret) {
dev_err(&dev->dev, "of_irq_parse_pci() failed with rc=%d\n", ret);
return 0; /* Proper return code 0 == NO_IRQ */
}
return irq_create_of_mapping(&oirq);
}
EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci);

14
drivers/pci/host/pci-mvebu.c
View file

@ -645,18 +645,6 @@ static int __init mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
return 1;
}
static int __init mvebu_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct of_phandle_args oirq;
int ret;
ret = of_irq_parse_pci(dev, &oirq);
if (ret)
return ret;
return irq_create_of_mapping(&oirq);
}
static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys)
{
struct mvebu_pcie *pcie = sys_to_pcie(sys);
@ -705,7 +693,7 @@ static void __init mvebu_pcie_enable(struct mvebu_pcie *pcie)
hw.private_data = (void **)&pcie;
hw.setup = mvebu_pcie_setup;
hw.scan = mvebu_pcie_scan_bus;
hw.map_irq = mvebu_pcie_map_irq;
hw.map_irq = of_irq_parse_and_map_pci;
hw.ops = &mvebu_pcie_ops;
hw.align_resource = mvebu_pcie_align_resource;

1
include/linux/of_pci.h
View file

@ -7,6 +7,7 @@
struct pci_dev;
struct of_phandle_args;
int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq);
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin);
struct device_node;
struct device_node *of_pci_find_child_device(struct device_node *parent,