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[PATCH 1/5] MIPS: pci-ar724x: convert into a platform driver

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 1/5] MIPS: pci-ar724x: convert into a platform driver
From: Gabor Juhos <juhosg@openwrt.org>
Date: Sat, 2 Feb 2013 13:40:42 +0100
Cc: linux-mips <linux-mips@linux-mips.org>, John Crispin <blogic@openwrt.org>, Gabor Juhos <juhosg@openwrt.org>
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The patch converts the pci-ar724x driver into a
platform driver. This makes it possible to register
the PCI controller as a plain platform device.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
---
Note:

In order to make the patch simple, the registration
of the corresponding platform device, and the removal
of the ar724x_pcibios_init function is implemented in
subsequent patches.
---
 arch/mips/pci/pci-ar724x.c |   57 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 55 insertions(+), 2 deletions(-)

diff --git a/arch/mips/pci/pci-ar724x.c b/arch/mips/pci/pci-ar724x.c
index c11c75b..e7aca88b 100644
--- a/arch/mips/pci/pci-ar724x.c
+++ b/arch/mips/pci/pci-ar724x.c
@@ -11,6 +11,8 @@
 
 #include <linux/irq.h>
 #include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/ar71xx_regs.h>
 #include <asm/mach-ath79/pci.h>
@@ -262,7 +264,7 @@ static struct irq_chip ar724x_pci_irq_chip = {
        .irq_mask_ack   = ar724x_pci_irq_mask,
 };
 
-static void __init ar724x_pci_irq_init(int irq)
+static void ar724x_pci_irq_init(int irq)
 {
        void __iomem *base;
        int i;
@@ -282,7 +284,7 @@ static void __init ar724x_pci_irq_init(int irq)
        irq_set_chained_handler(irq, ar724x_pci_irq_handler);
 }
 
-int __init ar724x_pcibios_init(int irq)
+int ar724x_pcibios_init(int irq)
 {
        int ret;
 
@@ -312,3 +314,54 @@ err_unmap_devcfg:
 err:
        return ret;
 }
+
+static int ar724x_pci_probe(struct platform_device *pdev)
+{
+       struct resource *res;
+       int irq;
+
+       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl_base");
+       if (!res)
+               return -EINVAL;
+
+       ar724x_pci_ctrl_base = devm_request_and_ioremap(&pdev->dev, res);
+       if (ar724x_pci_ctrl_base == NULL)
+               return -EBUSY;
+
+       res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg_base");
+       if (!res)
+               return -EINVAL;
+
+       ar724x_pci_devcfg_base = devm_request_and_ioremap(&pdev->dev, res);
+       if (!ar724x_pci_devcfg_base)
+               return -EBUSY;
+
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0)
+               return -EINVAL;
+
+       ar724x_pci_link_up = ar724x_pci_check_link();
+       if (!ar724x_pci_link_up)
+               dev_warn(&pdev->dev, "PCIe link is down\n");
+
+       ar724x_pci_irq_init(irq);
+
+       register_pci_controller(&ar724x_pci_controller);
+
+       return 0;
+}
+
+static struct platform_driver ar724x_pci_driver = {
+       .probe = ar724x_pci_probe,
+       .driver = {
+               .name = "ar724x-pci",
+               .owner = THIS_MODULE,
+       },
+};
+
+static int __init ar724x_pci_init(void)
+{
+       return platform_driver_register(&ar724x_pci_driver);
+}
+
+postcore_initcall(ar724x_pci_init);
-- 
1.7.10


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