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PCI: rcar: Register each instance independently 

Convert the code to allow per-device probe() like other device drivers.
This also delays driver registration due to change from subsys_initcall()
to regular module_platform_driver().

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Magnus Damm 2014-02-18 11:11:21 +09:00 committed by Bjorn Helgaas
parent e64a2a973e
commit 546cadda35
1 changed files with 20 additions and 60 deletions
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80
drivers/pci/host/pci-rcar-gen2.c
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@ -91,9 +91,6 @@
#define RCAR_PCI_UNIT_REV_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x48)
/* Number of internal PCI controllers */
#define RCAR_PCI_NR_CONTROLLERS 3
struct rcar_pci_priv {
struct device *dev;
void __iomem *reg;
@ -177,7 +174,7 @@ static int rcar_pci_write_config(struct pci_bus *bus, unsigned int devfn,
}
/* PCI interrupt mapping */
static int __init rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
static int rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct pci_sys_data *sys = dev->bus->sysdata;
struct rcar_pci_priv *priv = sys->private_data;
@ -226,7 +223,7 @@ static inline void rcar_pci_setup_errirq(struct rcar_pci_priv *priv) { }
#endif
/* PCI host controller setup */
static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
{
struct rcar_pci_priv *priv = sys->private_data;
void __iomem *reg = priv->reg;
@ -292,6 +289,8 @@ static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
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;
return 1;
}
@ -300,48 +299,13 @@ static struct pci_ops rcar_pci_ops = {
.write = rcar_pci_write_config,
};
static struct hw_pci rcar_hw_pci __initdata = {
.map_irq = rcar_pci_map_irq,
.ops = &rcar_pci_ops,
.setup = rcar_pci_setup,
};
static int rcar_pci_count __initdata;
static int __init rcar_pci_add_controller(struct rcar_pci_priv *priv)
{
void **private_data;
int count;
if (rcar_hw_pci.nr_controllers < rcar_pci_count)
goto add_priv;
/* (Re)allocate private data pointer array if needed */
count = rcar_pci_count + RCAR_PCI_NR_CONTROLLERS;
private_data = kzalloc(count * sizeof(void *), GFP_KERNEL);
if (!private_data)
return -ENOMEM;
rcar_pci_count = count;
if (rcar_hw_pci.private_data) {
memcpy(private_data, rcar_hw_pci.private_data,
rcar_hw_pci.nr_controllers * sizeof(void *));
kfree(rcar_hw_pci.private_data);
}
rcar_hw_pci.private_data = private_data;
add_priv:
/* Add private data pointer to the array */
rcar_hw_pci.private_data[rcar_hw_pci.nr_controllers++] = priv;
return 0;
}
static int __init rcar_pci_probe(struct platform_device *pdev)
static int rcar_pci_probe(struct platform_device *pdev)
{
struct resource *cfg_res, *mem_res;
struct rcar_pci_priv *priv;
void __iomem *reg;
struct hw_pci hw;
void *hw_private[1];
cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, cfg_res);
@ -377,31 +341,27 @@ static int __init rcar_pci_probe(struct platform_device *pdev)
return priv->irq;
}
return rcar_pci_add_controller(priv);
hw_private[0] = priv;
memset(&hw, 0, sizeof(hw));
hw.nr_controllers = ARRAY_SIZE(hw_private);
hw.private_data = hw_private;
hw.map_irq = rcar_pci_map_irq;
hw.ops = &rcar_pci_ops;
hw.setup = rcar_pci_setup;
pci_common_init_dev(&pdev->dev, &hw);
return 0;
}
static struct platform_driver rcar_pci_driver = {
.driver = {
.name = "pci-rcar-gen2",
.owner = THIS_MODULE,
.suppress_bind_attrs = true,
},
.probe = rcar_pci_probe,
};
static int __init rcar_pci_init(void)
{
int retval;
retval = platform_driver_probe(&rcar_pci_driver, rcar_pci_probe);
if (!retval)
pci_common_init(&rcar_hw_pci);
/* Private data pointer array is not needed any more */
kfree(rcar_hw_pci.private_data);
rcar_hw_pci.private_data = NULL;
return retval;
}
subsys_initcall(rcar_pci_init);
module_platform_driver(rcar_pci_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Renesas R-Car Gen2 internal PCI");