ipmi: convert OF driver to platform driver

of_bus is deprecated in favor of the plain platform bus. This patch
merges the ipmi OF driver with the existing platform driver.

CONFIG_PPC_OF occurrances are removed or replaced with CONFIG_OF.

Compile tested with and without CONFIG_OF. Tested OF probe and
default probe cases.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 23 insertions, 47 deletions

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 7855f9f45b8e..dcfc39ca753e 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -66,13 +66,10 @@
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <linux/pnp.h>
-
-#ifdef CONFIG_PPC_OF
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
-#endif
 
 #define PFX "ipmi_si: "
 
@@ -116,13 +113,7 @@ static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
 
 #define DEVICE_NAME "ipmi_si"
 
-static struct platform_driver ipmi_driver = {
-        .driver = {
-                .name = DEVICE_NAME,
-                .bus = &platform_bus_type
-        }
-};
-
+static struct platform_driver ipmi_driver;
 
 /*
  * Indexes into stats[] in smi_info below.
@@ -308,9 +299,6 @@ static int pci_registered;
 #ifdef CONFIG_ACPI
 static int pnp_registered;
 #endif
-#ifdef CONFIG_PPC_OF
-static int of_registered;
-#endif
 
 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
 static int num_max_busy_us;
@@ -1860,8 +1848,9 @@ static int hotmod_handler(const char *val, struct kernel_param *kp)
         return rv;
 }
 
-static void __devinit hardcode_find_bmc(void)
+static int __devinit hardcode_find_bmc(void)
 {
+        int ret = -ENODEV;
         int             i;
         struct smi_info *info;
 
@@ -1871,7 +1860,7 @@ static void __devinit hardcode_find_bmc(void)
 
                 info = smi_info_alloc();
                 if (!info)
-                        return;
+                        return -ENOMEM;
 
                 info->addr_source = SI_HARDCODED;
                 printk(KERN_INFO PFX "probing via hardcoded address\n");
@@ -1924,10 +1913,12 @@ static void __devinit hardcode_find_bmc(void)
                 if (!add_smi(info)) {
                         if (try_smi_init(info))
                                 cleanup_one_si(info);
+                        ret = 0;
                 } else {
                         kfree(info);
                 }
         }
+        return ret;
 }
 
 #ifdef CONFIG_ACPI
@@ -2555,11 +2546,9 @@ static struct pci_driver ipmi_pci_driver = {
 };
 #endif /* CONFIG_PCI */
 
-
-#ifdef CONFIG_PPC_OF
-static int __devinit ipmi_of_probe(struct platform_device *dev,
-                         const struct of_device_id *match)
+static int __devinit ipmi_probe(struct platform_device *dev)
 {
+#ifdef CONFIG_OF
         struct smi_info *info;
         struct resource resource;
         const __be32 *regsize, *regspacing, *regshift;
@@ -2569,6 +2558,9 @@ static int __devinit ipmi_of_probe(struct platform_device *dev,
 
         dev_info(&dev->dev, "probing via device tree\n");
 
+        if (!dev->dev.of_match)
+                return -EINVAL;
+
         ret = of_address_to_resource(np, 0, &resource);
         if (ret) {
                 dev_warn(&dev->dev, PFX "invalid address from OF\n");
@@ -2601,7 +2593,7 @@ static int __devinit ipmi_of_probe(struct platform_device *dev,
                 return -ENOMEM;
         }
 
-        info->si_type           = (enum si_type) match->data;
+        info->si_type           = (enum si_type) dev->dev.of_match->data;
         info->addr_source       = SI_DEVICETREE;
         info->irq_setup         = std_irq_setup;
 
@@ -2632,13 +2624,15 @@ static int __devinit ipmi_of_probe(struct platform_device *dev,
                 kfree(info);
                 return -EBUSY;
         }
-
+#endif
         return 0;
 }
 
-static int __devexit ipmi_of_remove(struct platform_device *dev)
+static int __devexit ipmi_remove(struct platform_device *dev)
 {
+#ifdef CONFIG_OF
         cleanup_one_si(dev_get_drvdata(&dev->dev));
+#endif
         return 0;
 }
 
@@ -2653,16 +2647,15 @@ static struct of_device_id ipmi_match[] =
         {},
 };
 
-static struct of_platform_driver ipmi_of_platform_driver = {
+static struct platform_driver ipmi_driver = {
         .driver = {
-                .name = "ipmi",
+                .name = DEVICE_NAME,
                 .owner = THIS_MODULE,
                 .of_match_table = ipmi_match,
         },
-        .probe          = ipmi_of_probe,
-        .remove         = __devexit_p(ipmi_of_remove),
+        .probe          = ipmi_probe,
+        .remove         = __devexit_p(ipmi_remove),
 };
-#endif /* CONFIG_PPC_OF */
 
 static int wait_for_msg_done(struct smi_info *smi_info)
 {
@@ -3340,8 +3333,7 @@ static int __devinit init_ipmi_si(void)
                 return 0;
         initialized = 1;
 
-        /* Register the device drivers. */
-        rv = driver_register(&ipmi_driver.driver);
+        rv = platform_driver_register(&ipmi_driver);
         if (rv) {
                 printk(KERN_ERR PFX "Unable to register driver: %d\n", rv);
                 return rv;
@@ -3365,15 +3357,9 @@ static int __devinit init_ipmi_si(void)
 
         printk(KERN_INFO "IPMI System Interface driver.\n");
 
-        hardcode_find_bmc();
-
         /* If the user gave us a device, they presumably want us to use it */
-        mutex_lock(&smi_infos_lock);
-        if (!list_empty(&smi_infos)) {
-                mutex_unlock(&smi_infos_lock);
+        if (!hardcode_find_bmc())
                 return 0;
-        }
-        mutex_unlock(&smi_infos_lock);
 
 #ifdef CONFIG_PCI
         rv = pci_register_driver(&ipmi_pci_driver);
@@ -3396,11 +3382,6 @@ static int __devinit init_ipmi_si(void)
         spmi_find_bmc();
 #endif
 
-#ifdef CONFIG_PPC_OF
-        of_register_platform_driver(&ipmi_of_platform_driver);
-        of_registered = 1;
-#endif
-
         /* We prefer devices with interrupts, but in the case of a machine
            with multiple BMCs we assume that there will be several instances
            of a given type so if we succeed in registering a type then also
@@ -3548,17 +3529,12 @@ static void __exit cleanup_ipmi_si(void)
                 pnp_unregister_driver(&ipmi_pnp_driver);
 #endif
 
-#ifdef CONFIG_PPC_OF
-        if (of_registered)
-                of_unregister_platform_driver(&ipmi_of_platform_driver);
-#endif
+        platform_driver_unregister(&ipmi_driver);
 
         mutex_lock(&smi_infos_lock);
         list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
                 cleanup_one_si(e);
         mutex_unlock(&smi_infos_lock);
-
-        driver_unregister(&ipmi_driver.driver);
 }
 module_exit(cleanup_ipmi_si);