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authorJean Delvare <khali@linux-fr.org>2009-06-15 18:01:50 +0200
committerJean Delvare <khali@linux-fr.org>2009-06-15 18:01:50 +0200
commit1b9f37d488f09342610b29ac1c8e734e540932ab (patch)
tree2712ad4ca814a3b497c771962cb2fc99242d452f
parenta231591f0427cfb91ae247be974a7fa0e6b37389 (diff)
downloadlinux-2.6.34-ux500-1b9f37d488f09342610b29ac1c8e734e540932ab.tar.gz
therm_pm72: Convert to a new-style i2c driver
The legacy i2c binding model is going away soon, so convert the macintosh therm_pm72 driver to the new model or it will break. This is really a quick and dirty conversion, that should do the trick for now, but no doubt that something cleaner can be done if anyone is interested. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--drivers/macintosh/therm_pm72.c95
1 files changed, 47 insertions, 48 deletions
diff --git a/drivers/macintosh/therm_pm72.c b/drivers/macintosh/therm_pm72.c
index 817607e2af6..a028598af2d 100644
--- a/drivers/macintosh/therm_pm72.c
+++ b/drivers/macintosh/therm_pm72.c
@@ -287,22 +287,6 @@ struct fcu_fan_table fcu_fans[] = {
};
/*
- * i2c_driver structure to attach to the host i2c controller
- */
-
-static int therm_pm72_attach(struct i2c_adapter *adapter);
-static int therm_pm72_detach(struct i2c_adapter *adapter);
-
-static struct i2c_driver therm_pm72_driver =
-{
- .driver = {
- .name = "therm_pm72",
- },
- .attach_adapter = therm_pm72_attach,
- .detach_adapter = therm_pm72_detach,
-};
-
-/*
* Utility function to create an i2c_client structure and
* attach it to one of u3 adapters
*/
@@ -310,6 +294,7 @@ static struct i2c_client *attach_i2c_chip(int id, const char *name)
{
struct i2c_client *clt;
struct i2c_adapter *adap;
+ struct i2c_board_info info;
if (id & 0x200)
adap = k2;
@@ -320,31 +305,21 @@ static struct i2c_client *attach_i2c_chip(int id, const char *name)
if (adap == NULL)
return NULL;
- clt = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (clt == NULL)
- return NULL;
-
- clt->addr = (id >> 1) & 0x7f;
- clt->adapter = adap;
- clt->driver = &therm_pm72_driver;
- strncpy(clt->name, name, I2C_NAME_SIZE-1);
-
- if (i2c_attach_client(clt)) {
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = (id >> 1) & 0x7f;
+ strlcpy(info.type, "therm_pm72", I2C_NAME_SIZE);
+ clt = i2c_new_device(adap, &info);
+ if (!clt) {
printk(KERN_ERR "therm_pm72: Failed to attach to i2c ID 0x%x\n", id);
- kfree(clt);
return NULL;
}
- return clt;
-}
-/*
- * Utility function to get rid of the i2c_client structure
- * (will also detach from the adapter hopepfully)
- */
-static void detach_i2c_chip(struct i2c_client *clt)
-{
- i2c_detach_client(clt);
- kfree(clt);
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&clt->detected, &clt->driver->clients);
+ return clt;
}
/*
@@ -1203,8 +1178,6 @@ static int init_cpu_state(struct cpu_pid_state *state, int index)
return 0;
fail:
- if (state->monitor)
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
return -ENODEV;
@@ -1232,7 +1205,6 @@ static void dispose_cpu_state(struct cpu_pid_state *state)
device_remove_file(&of_dev->dev, &dev_attr_cpu1_intake_fan_rpm);
}
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
@@ -1407,7 +1379,6 @@ static void dispose_backside_state(struct backside_pid_state *state)
device_remove_file(&of_dev->dev, &dev_attr_backside_temperature);
device_remove_file(&of_dev->dev, &dev_attr_backside_fan_pwm);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
@@ -1532,7 +1503,6 @@ static void dispose_drives_state(struct drives_pid_state *state)
device_remove_file(&of_dev->dev, &dev_attr_drives_temperature);
device_remove_file(&of_dev->dev, &dev_attr_drives_fan_rpm);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
@@ -1654,7 +1624,6 @@ static void dispose_dimms_state(struct dimm_pid_state *state)
device_remove_file(&of_dev->dev, &dev_attr_dimms_temperature);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
@@ -1779,7 +1748,6 @@ static void dispose_slots_state(struct slots_pid_state *state)
device_remove_file(&of_dev->dev, &dev_attr_slots_temperature);
device_remove_file(&of_dev->dev, &dev_attr_slots_fan_pwm);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
@@ -2008,8 +1976,6 @@ static int attach_fcu(void)
*/
static void detach_fcu(void)
{
- if (fcu)
- detach_i2c_chip(fcu);
fcu = NULL;
}
@@ -2060,12 +2026,21 @@ static int therm_pm72_attach(struct i2c_adapter *adapter)
return 0;
}
+static int therm_pm72_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ /* Always succeed, the real work was done in therm_pm72_attach() */
+ return 0;
+}
+
/*
- * Called on every adapter when the driver or the i2c controller
+ * Called when any of the devices which participates into thermal management
* is going away.
*/
-static int therm_pm72_detach(struct i2c_adapter *adapter)
+static int therm_pm72_remove(struct i2c_client *client)
{
+ struct i2c_adapter *adapter = client->adapter;
+
mutex_lock(&driver_lock);
if (state != state_detached)
@@ -2096,6 +2071,30 @@ static int therm_pm72_detach(struct i2c_adapter *adapter)
return 0;
}
+/*
+ * i2c_driver structure to attach to the host i2c controller
+ */
+
+static const struct i2c_device_id therm_pm72_id[] = {
+ /*
+ * Fake device name, thermal management is done by several
+ * chips but we don't need to differentiate between them at
+ * this point.
+ */
+ { "therm_pm72", 0 },
+ { }
+};
+
+static struct i2c_driver therm_pm72_driver = {
+ .driver = {
+ .name = "therm_pm72",
+ },
+ .attach_adapter = therm_pm72_attach,
+ .probe = therm_pm72_probe,
+ .remove = therm_pm72_remove,
+ .id_table = therm_pm72_id,
+};
+
static int fan_check_loc_match(const char *loc, int fan)
{
char tmp[64];