[RFC PATCH] ipmi: convert OF driver to platform driver

From: Rob Herring
Date: Wed Feb 23 2011 - 16:38:13 EST

From: Rob Herring <rob.herring@xxxxxxxxxxx>

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@xxxxxxxxxxx>

---
drivers/char/ipmi/ipmi_si_intf.c | 70 ++++++++++++-------------------------
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 7855f9f..dcfc39c 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);

--
1.7.1

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