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path: root/arch/powerpc/platforms/pasemi/gpio_mdio.c
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Diffstat (limited to 'arch/powerpc/platforms/pasemi/gpio_mdio.c')
-rw-r--r--arch/powerpc/platforms/pasemi/gpio_mdio.c96
1 files changed, 59 insertions, 37 deletions
diff --git a/arch/powerpc/platforms/pasemi/gpio_mdio.c b/arch/powerpc/platforms/pasemi/gpio_mdio.c
index dae9f658122..b46542990cf 100644
--- a/arch/powerpc/platforms/pasemi/gpio_mdio.c
+++ b/arch/powerpc/platforms/pasemi/gpio_mdio.c
@@ -30,7 +30,7 @@
#include <linux/interrupt.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
-#include <asm/of_platform.h>
+#include <linux/of_platform.h>
#define DELAY 1
@@ -218,45 +218,27 @@ static int __devinit gpio_mdio_probe(struct of_device *ofdev,
const struct of_device_id *match)
{
struct device *dev = &ofdev->dev;
- struct device_node *np = ofdev->node;
- struct device_node *gpio_np;
+ struct device_node *phy_dn, *np = ofdev->node;
struct mii_bus *new_bus;
- struct resource res;
struct gpio_priv *priv;
const unsigned int *prop;
- int err = 0;
+ int err;
int i;
- gpio_np = of_find_compatible_node(NULL, "gpio", "1682m-gpio");
-
- if (!gpio_np)
- return -ENODEV;
-
- err = of_address_to_resource(gpio_np, 0, &res);
- of_node_put(gpio_np);
-
- if (err)
- return -EINVAL;
-
- if (!gpio_regs)
- gpio_regs = ioremap(res.start, 0x100);
-
- if (!gpio_regs)
- return -EPERM;
-
+ err = -ENOMEM;
priv = kzalloc(sizeof(struct gpio_priv), GFP_KERNEL);
- if (priv == NULL)
- return -ENOMEM;
+ if (!priv)
+ goto out;
new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
- if (new_bus == NULL)
- return -ENOMEM;
+ if (!new_bus)
+ goto out_free_priv;
- new_bus->name = "pasemi gpio mdio bus",
- new_bus->read = &gpio_mdio_read,
- new_bus->write = &gpio_mdio_write,
- new_bus->reset = &gpio_mdio_reset,
+ new_bus->name = "pasemi gpio mdio bus";
+ new_bus->read = &gpio_mdio_read;
+ new_bus->write = &gpio_mdio_write;
+ new_bus->reset = &gpio_mdio_reset;
prop = of_get_property(np, "reg", NULL);
new_bus->id = *prop;
@@ -265,9 +247,24 @@ static int __devinit gpio_mdio_probe(struct of_device *ofdev,
new_bus->phy_mask = 0;
new_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
- for(i = 0; i < PHY_MAX_ADDR; ++i)
- new_bus->irq[i] = irq_create_mapping(NULL, 10);
+ if (!new_bus->irq)
+ goto out_free_bus;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ new_bus->irq[i] = NO_IRQ;
+
+ for (phy_dn = of_get_next_child(np, NULL);
+ phy_dn != NULL;
+ phy_dn = of_get_next_child(np, phy_dn)) {
+ const unsigned int *ip, *regp;
+
+ ip = of_get_property(phy_dn, "interrupts", NULL);
+ regp = of_get_property(phy_dn, "reg", NULL);
+ if (!ip || !regp || *regp >= PHY_MAX_ADDR)
+ continue;
+ new_bus->irq[*regp] = irq_create_mapping(NULL, *ip);
+ }
prop = of_get_property(np, "mdc-pin", NULL);
priv->mdc_pin = *prop;
@@ -280,17 +277,21 @@ static int __devinit gpio_mdio_probe(struct of_device *ofdev,
err = mdiobus_register(new_bus);
- if (0 != err) {
+ if (err != 0) {
printk(KERN_ERR "%s: Cannot register as MDIO bus, err %d\n",
new_bus->name, err);
- goto bus_register_fail;
+ goto out_free_irq;
}
return 0;
-bus_register_fail:
+out_free_irq:
+ kfree(new_bus->irq);
+out_free_bus:
kfree(new_bus);
-
+out_free_priv:
+ kfree(priv);
+out:
return err;
}
@@ -317,6 +318,7 @@ static struct of_device_id gpio_mdio_match[] =
},
{},
};
+MODULE_DEVICE_TABLE(of, gpio_mdio_match);
static struct of_platform_driver gpio_mdio_driver =
{
@@ -330,12 +332,32 @@ static struct of_platform_driver gpio_mdio_driver =
int gpio_mdio_init(void)
{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "1682m-gpio");
+ if (!np)
+ np = of_find_compatible_node(NULL, NULL,
+ "pasemi,pwrficient-gpio");
+ if (!np)
+ return -ENODEV;
+ gpio_regs = of_iomap(np, 0);
+ of_node_put(np);
+
+ if (!gpio_regs)
+ return -ENODEV;
+
return of_register_platform_driver(&gpio_mdio_driver);
}
+module_init(gpio_mdio_init);
void gpio_mdio_exit(void)
{
of_unregister_platform_driver(&gpio_mdio_driver);
+ if (gpio_regs)
+ iounmap(gpio_regs);
}
-device_initcall(gpio_mdio_init);
+module_exit(gpio_mdio_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
+MODULE_DESCRIPTION("Driver for MDIO over GPIO on PA Semi PWRficient-based boards");