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i2c-powermac: Include the i2c_adapter in struct pmac_i2c_bus 

Include the i2c_adapter in struct pmac_i2c_bus. This avoids memory
fragmentation and allows for several code cleanups.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Michel Daenzer <michel@daenzer.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Jean Delvare 2009-12-06 17:06:19 +01:00
parent d7d838a6eb
commit 6dfa5ca3c9
3 changed files with 9 additions and 37 deletions
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6
arch/powerpc/include/asm/pmac_low_i2c.h
View File

@ -72,11 +72,7 @@ extern int pmac_i2c_get_type(struct pmac_i2c_bus *bus);
extern int pmac_i2c_get_flags(struct pmac_i2c_bus *bus);
extern int pmac_i2c_get_channel(struct pmac_i2c_bus *bus);
/* i2c layer adapter attach/detach */
extern void pmac_i2c_attach_adapter(struct pmac_i2c_bus *bus,
struct i2c_adapter *adapter);
extern void pmac_i2c_detach_adapter(struct pmac_i2c_bus *bus,
struct i2c_adapter *adapter);
/* i2c layer adapter helpers */
extern struct i2c_adapter *pmac_i2c_get_adapter(struct pmac_i2c_bus *bus);
extern struct pmac_i2c_bus *pmac_i2c_adapter_to_bus(struct i2c_adapter *adapter);

25
arch/powerpc/platforms/powermac/low_i2c.c
View File

@ -42,6 +42,7 @@
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/mutex.h>
#include <linux/i2c.h>
#include <asm/keylargo.h>
#include <asm/uninorth.h>
#include <asm/io.h>
@ -80,7 +81,7 @@ struct pmac_i2c_bus
struct device_node *busnode;
int type;
int flags;
struct i2c_adapter *adapter;
struct i2c_adapter adapter;
void *hostdata;
int channel; /* some hosts have multiple */
int mode; /* current mode */
@ -1014,25 +1015,9 @@ int pmac_i2c_get_channel(struct pmac_i2c_bus *bus)
EXPORT_SYMBOL_GPL(pmac_i2c_get_channel);
void pmac_i2c_attach_adapter(struct pmac_i2c_bus *bus,
struct i2c_adapter *adapter)
{
WARN_ON(bus->adapter != NULL);
bus->adapter = adapter;
}
EXPORT_SYMBOL_GPL(pmac_i2c_attach_adapter);
void pmac_i2c_detach_adapter(struct pmac_i2c_bus *bus,
struct i2c_adapter *adapter)
{
WARN_ON(bus->adapter != adapter);
bus->adapter = NULL;
}
EXPORT_SYMBOL_GPL(pmac_i2c_detach_adapter);
struct i2c_adapter *pmac_i2c_get_adapter(struct pmac_i2c_bus *bus)
{
return bus->adapter;
return &bus->adapter;
}
EXPORT_SYMBOL_GPL(pmac_i2c_get_adapter);
@ -1041,7 +1026,7 @@ struct pmac_i2c_bus *pmac_i2c_adapter_to_bus(struct i2c_adapter *adapter)
struct pmac_i2c_bus *bus;
list_for_each_entry(bus, &pmac_i2c_busses, link)
if (bus->adapter == adapter)
if (&bus->adapter == adapter)
return bus;
return NULL;
}
@ -1053,7 +1038,7 @@ int pmac_i2c_match_adapter(struct device_node *dev, struct i2c_adapter *adapter)
if (bus == NULL)
return 0;
return (bus->adapter == adapter);
return (&bus->adapter == adapter);
}
EXPORT_SYMBOL_GPL(pmac_i2c_match_adapter);

15
drivers/i2c/busses/i2c-powermac.c
View File

@ -204,19 +204,16 @@ static const struct i2c_algorithm i2c_powermac_algorithm = {
static int __devexit i2c_powermac_remove(struct platform_device *dev)
{
struct i2c_adapter *adapter = platform_get_drvdata(dev);
struct pmac_i2c_bus *bus = i2c_get_adapdata(adapter);
int rc;
rc = i2c_del_adapter(adapter);
pmac_i2c_detach_adapter(bus, adapter);
i2c_set_adapdata(adapter, NULL);
/* We aren't that prepared to deal with this... */
if (rc)
printk(KERN_WARNING
"i2c-powermac.c: Failed to remove bus %s !\n",
adapter->name);
platform_set_drvdata(dev, NULL);
kfree(adapter);
memset(adapter, 0, sizeof(*adapter));
return 0;
}
@ -261,23 +258,17 @@ static int __devinit i2c_powermac_probe(struct platform_device *dev)
snprintf(name, 32, "%s %d", basename, pmac_i2c_get_channel(bus));
of_node_put(parent);
adapter = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL);
if (adapter == NULL) {
printk(KERN_ERR "i2c-powermac: can't allocate inteface !\n");
return -ENOMEM;
}
adapter = pmac_i2c_get_adapter(bus);
platform_set_drvdata(dev, adapter);
strcpy(adapter->name, name);
adapter->algo = &i2c_powermac_algorithm;
i2c_set_adapdata(adapter, bus);
adapter->dev.parent = &dev->dev;
pmac_i2c_attach_adapter(bus, adapter);
rc = i2c_add_adapter(adapter);
if (rc) {
printk(KERN_ERR "i2c-powermac: Adapter %s registration "
"failed\n", name);
i2c_set_adapdata(adapter, NULL);
pmac_i2c_detach_adapter(bus, adapter);
memset(adapter, 0, sizeof(*adapter));
}
printk(KERN_INFO "PowerMac i2c bus %s registered\n", name);