[PATCH 01/04] PCI: rcar: Register each instance independently

Magnus Damm
2014-02-05T06:52:24Z

From: Magnus Damm <damm@opensource.se>

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>
---

drivers/pci/host/pci-rcar-gen2.c | 74 ++++++++------------------------------
1 file changed, 16 insertions(+), 58 deletions(-)

--- 0001/drivers/pci/host/pci-rcar-gen2.c
+++ work/drivers/pci/host/pci-rcar-gen2.c 2014-02-04 16:38:46.000000000 +0900
@@ -74,9 +74,6 @@

#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;
@@ -228,6 +225,8 @@ static int __init rcar_pci_setup(int nr,
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;
}

@@ -236,48 +235,12 @@ 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;

cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, cfg_res);
@@ -308,31 +271,26 @@ static int __init rcar_pci_probe(struct
priv->reg = reg;
priv->dev = &pdev->dev;

- return rcar_pci_add_controller(priv);
+ memset(&hw, 0, sizeof(hw));
+ hw.nr_controllers = 1;
+ hw.private_data = (void **)&priv;
+ 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");