[SERIAL] sunhv: Convert to of_driver layer.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 71 insertions, 95 deletions

diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c
index d36bc4003399..f851f0f44f9b 100644
--- a/drivers/serial/sunhv.c
+++ b/drivers/serial/sunhv.c
@@ -20,8 +20,8 @@
 
 #include <asm/hypervisor.h>
 #include <asm/spitfire.h>
-#include <asm/vdev.h>
-#include <asm/oplib.h>
+#include <asm/prom.h>
+#include <asm/of_device.h>
 #include <asm/irq.h>
 
 #if defined(CONFIG_MAGIC_SYSRQ)
@@ -407,144 +407,120 @@ static inline struct console *SUNHV_CONSOLE(void)
         return &sunhv_console;
 }
 
-static int __init hv_console_compatible(char *buf, int len)
-{
-        while (len) {
-                int this_len;
-
-                if (!strcmp(buf, "qcn"))
-                        return 1;
-
-                this_len = strlen(buf) + 1;
-
-                buf += this_len;
-                len -= this_len;
-        }
-
-        return 0;
-}
-
-static unsigned int __init get_interrupt(void)
-{
-        struct device_node *dev_node;
-
-        dev_node = sun4v_vdev_root->child;
-        while (dev_node != NULL) {
-                struct property *prop;
-
-                if (strcmp(dev_node->name, "console"))
-                        goto next_sibling;
-
-                prop = of_find_property(dev_node, "compatible", NULL);
-                if (!prop)
-                        goto next_sibling;
-
-                if (hv_console_compatible(prop->value, prop->length))
-                        break;
-
-        next_sibling:
-                dev_node = dev_node->sibling;
-        }
-        if (!dev_node)
-                return 0;
-
-        /* Ok, the this is the OBP node for the sun4v hypervisor
-         * console device.  Decode the interrupt.
-         */
-        return sun4v_vdev_device_interrupt(dev_node);
-}
-
-static int __init sunhv_init(void)
+static int __devinit hv_probe(struct of_device *op, const struct of_device_id *match)
 {
         struct uart_port *port;
-        int ret;
+        int err;
 
-        if (tlb_type != hypervisor)
+        if (op->irqs[0] == 0xffffffff)
                 return -ENODEV;
 
-        port = kmalloc(sizeof(struct uart_port), GFP_KERNEL);
+        port = kzalloc(sizeof(struct uart_port), GFP_KERNEL);
         if (unlikely(!port))
                 return -ENOMEM;
 
-        memset(port, 0, sizeof(struct uart_port));
+        sunhv_port = port;
 
         port->line = 0;
         port->ops = &sunhv_pops;
         port->type = PORT_SUNHV;
         port->uartclk = ( 29491200 / 16 ); /* arbitrary */
 
-        /* Set this just to make uart_configure_port() happy.  */
         port->membase = (unsigned char __iomem *) __pa(port);
 
-        port->irq = get_interrupt();
-        if (!port->irq) {
-                kfree(port);
-                return -ENODEV;
-        }
+        port->irq = op->irqs[0];
+
+        port->dev = &op->dev;
 
         sunhv_reg.minor = sunserial_current_minor;
         sunhv_reg.nr = 1;
 
-        ret = uart_register_driver(&sunhv_reg);
-        if (ret < 0) {
-                printk(KERN_ERR "SUNHV: uart_register_driver() failed %d\n",
-                       ret);
-                kfree(port);
-
-                return ret;
-        }
+        err = uart_register_driver(&sunhv_reg);
+        if (err)
+                goto out_free_port;
 
         sunhv_reg.tty_driver->name_base = sunhv_reg.minor - 64;
         sunserial_current_minor += 1;
 
         sunhv_reg.cons = SUNHV_CONSOLE();
 
-        sunhv_port = port;
+        err = uart_add_one_port(&sunhv_reg, port);
+        if (err)
+                goto out_unregister_driver;
 
-        ret = uart_add_one_port(&sunhv_reg, port);
-        if (ret < 0) {
-                printk(KERN_ERR "SUNHV: uart_add_one_port() failed %d\n", ret);
-                sunserial_current_minor -= 1;
-                uart_unregister_driver(&sunhv_reg);
-                kfree(port);
-                sunhv_port = NULL;
-                return -ENODEV;
-        }
+        err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port);
+        if (err)
+                goto out_remove_port;
 
-        if (request_irq(port->irq, sunhv_interrupt,
-                        SA_SHIRQ, "serial(sunhv)", port)) {
-                printk(KERN_ERR "sunhv: Cannot register IRQ\n");
-                uart_remove_one_port(&sunhv_reg, port);
-                sunserial_current_minor -= 1;
-                uart_unregister_driver(&sunhv_reg);
-                kfree(port);
-                sunhv_port = NULL;
-                return -ENODEV;
-        }
+        dev_set_drvdata(&op->dev, port);
 
         return 0;
+
+out_remove_port:
+        uart_remove_one_port(&sunhv_reg, port);
+
+out_unregister_driver:
+        sunserial_current_minor -= 1;
+        uart_unregister_driver(&sunhv_reg);
+
+out_free_port:
+        kfree(port);
+        sunhv_port = NULL;
+        return err;
 }
 
-static void __exit sunhv_exit(void)
+static int __devexit hv_remove(struct of_device *dev)
 {
-        struct uart_port *port = sunhv_port;
-
-        BUG_ON(!port);
+        struct uart_port *port = dev_get_drvdata(&dev->dev);
 
         free_irq(port->irq, port);
 
         uart_remove_one_port(&sunhv_reg, port);
-        sunserial_current_minor -= 1;
 
+        sunserial_current_minor -= 1;
         uart_unregister_driver(&sunhv_reg);
 
-        kfree(sunhv_port);
+        kfree(port);
         sunhv_port = NULL;
+
+        dev_set_drvdata(&dev->dev, NULL);
+
+        return 0;
+}
+
+static struct of_device_id hv_match[] = {
+        {
+                .name = "console",
+                .compatible = "qcn",
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, hv_match);
+
+static struct of_platform_driver hv_driver = {
+        .name           = "hv",
+        .match_table    = hv_match,
+        .probe          = hv_probe,
+        .remove         = __devexit_p(hv_remove),
+};
+
+static int __init sunhv_init(void)
+{
+        if (tlb_type != hypervisor)
+                return -ENODEV;
+
+        return of_register_driver(&hv_driver, &of_bus_type);
+}
+
+static void __exit sunhv_exit(void)
+{
+        of_unregister_driver(&hv_driver);
 }
 
 module_init(sunhv_init);
 module_exit(sunhv_exit);
 
 MODULE_AUTHOR("David S. Miller");
-MODULE_DESCRIPTION("SUN4V Hypervisor console driver")
+MODULE_DESCRIPTION("SUN4V Hypervisor console driver");
+MODULE_VERSION("2.0");
 MODULE_LICENSE("GPL");