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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-04-18 22:16:44 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-04-30 15:37:18 +1000
commit5400480f5411aab31939747371c6690a02ee7780 (patch)
tree4fa927215a522c96abe0d1d44f0431474211edcc /drivers/macintosh
parent7a4b15cdf3d607152ba23fa4aa2bf072c6810924 (diff)
downloadlinux-5400480f5411aab31939747371c6690a02ee7780.tar.gz
powerpc/pmac: Convert windfarm_lm75 to new i2c probing
This simplifies the driver to stop using the deprecated attach interface Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/macintosh')
-rw-r--r--drivers/macintosh/windfarm_lm75_sensor.c124
1 files changed, 30 insertions, 94 deletions
diff --git a/drivers/macintosh/windfarm_lm75_sensor.c b/drivers/macintosh/windfarm_lm75_sensor.c
index 4d6a90a1372..4cc3f935709 100644
--- a/drivers/macintosh/windfarm_lm75_sensor.c
+++ b/drivers/macintosh/windfarm_lm75_sensor.c
@@ -23,7 +23,7 @@
#include "windfarm.h"
-#define VERSION "0.2"
+#define VERSION "1.0"
#undef DEBUG
@@ -36,8 +36,8 @@
struct wf_lm75_sensor {
int ds1775 : 1;
int inited : 1;
- struct i2c_client *i2c;
- struct wf_sensor sens;
+ struct i2c_client *i2c;
+ struct wf_sensor sens;
};
#define wf_to_lm75(c) container_of(c, struct wf_lm75_sensor, sens)
@@ -90,40 +90,19 @@ static struct wf_sensor_ops wf_lm75_ops = {
static int wf_lm75_probe(struct i2c_client *client,
const struct i2c_device_id *id)
-{
+{
struct wf_lm75_sensor *lm;
- int rc;
-
- lm = kzalloc(sizeof(struct wf_lm75_sensor), GFP_KERNEL);
- if (lm == NULL)
- return -ENODEV;
-
- lm->inited = 0;
- lm->ds1775 = id->driver_data;
- lm->i2c = client;
- lm->sens.name = client->dev.platform_data;
- lm->sens.ops = &wf_lm75_ops;
- i2c_set_clientdata(client, lm);
-
- rc = wf_register_sensor(&lm->sens);
- if (rc)
- kfree(lm);
-
- return rc;
-}
-
-static struct i2c_driver wf_lm75_driver;
-
-static struct i2c_client *wf_lm75_create(struct i2c_adapter *adapter,
- u8 addr, int ds1775,
- const char *loc)
-{
- struct i2c_board_info info;
- struct i2c_client *client;
- char *name;
+ int rc, ds1775 = id->driver_data;
+ const char *name, *loc;
DBG("wf_lm75: creating %s device at address 0x%02x\n",
- ds1775 ? "ds1775" : "lm75", addr);
+ ds1775 ? "ds1775" : "lm75", client->addr);
+
+ loc = of_get_property(client->dev.of_node, "hwsensor-location", NULL);
+ if (!loc) {
+ dev_warn(&client->dev, "Missing hwsensor-location property!\n");
+ return -ENXIO;
+ }
/* Usual rant about sensor names not beeing very consistent in
* the device-tree, oh well ...
@@ -138,67 +117,24 @@ static struct i2c_client *wf_lm75_create(struct i2c_adapter *adapter,
else if (!strcmp(loc, "HD Temp"))
name = "hard-drive-temp";
else
- goto fail;
-
- memset(&info, 0, sizeof(struct i2c_board_info));
- info.addr = (addr >> 1) & 0x7f;
- info.platform_data = name;
- strlcpy(info.type, ds1775 ? "wf_ds1775" : "wf_lm75", I2C_NAME_SIZE);
-
- client = i2c_new_device(adapter, &info);
- if (client == NULL) {
- printk(KERN_ERR "windfarm: failed to attach %s %s to i2c\n",
- ds1775 ? "ds1775" : "lm75", name);
- goto fail;
- }
-
- /*
- * 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(&client->detected, &wf_lm75_driver.clients);
- return client;
- fail:
- return NULL;
-}
-
-static int wf_lm75_attach(struct i2c_adapter *adapter)
-{
- struct device_node *busnode, *dev;
- struct pmac_i2c_bus *bus;
+ return -ENXIO;
+
- DBG("wf_lm75: adapter %s detected\n", adapter->name);
-
- bus = pmac_i2c_adapter_to_bus(adapter);
- if (bus == NULL)
+ lm = kzalloc(sizeof(struct wf_lm75_sensor), GFP_KERNEL);
+ if (lm == NULL)
return -ENODEV;
- busnode = pmac_i2c_get_bus_node(bus);
- DBG("wf_lm75: bus found, looking for device...\n");
-
- /* Now look for lm75(s) in there */
- for (dev = NULL;
- (dev = of_get_next_child(busnode, dev)) != NULL;) {
- const char *loc =
- of_get_property(dev, "hwsensor-location", NULL);
- u8 addr;
+ lm->inited = 0;
+ lm->ds1775 = ds1775;
+ lm->i2c = client;
+ lm->sens.name = (char *)name; /* XXX fix constness in structure */
+ lm->sens.ops = &wf_lm75_ops;
+ i2c_set_clientdata(client, lm);
- /* We must re-match the adapter in order to properly check
- * the channel on multibus setups
- */
- if (!pmac_i2c_match_adapter(dev, adapter))
- continue;
- addr = pmac_i2c_get_dev_addr(dev);
- if (loc == NULL || addr == 0)
- continue;
- /* real lm75 */
- if (of_device_is_compatible(dev, "lm75"))
- wf_lm75_create(adapter, addr, 0, loc);
- /* ds1775 (compatible, better resolution */
- else if (of_device_is_compatible(dev, "ds1775"))
- wf_lm75_create(adapter, addr, 1, loc);
- }
- return 0;
+ rc = wf_register_sensor(&lm->sens);
+ if (rc)
+ kfree(lm);
+ return rc;
}
static int wf_lm75_remove(struct i2c_client *client)
@@ -217,16 +153,16 @@ static int wf_lm75_remove(struct i2c_client *client)
}
static const struct i2c_device_id wf_lm75_id[] = {
- { "wf_lm75", 0 },
- { "wf_ds1775", 1 },
+ { "MAC,lm75", 0 },
+ { "MAC,ds1775", 1 },
{ }
};
+MODULE_DEVICE_TABLE(i2c, wf_lm75_id);
static struct i2c_driver wf_lm75_driver = {
.driver = {
.name = "wf_lm75",
},
- .attach_adapter = wf_lm75_attach,
.probe = wf_lm75_probe,
.remove = wf_lm75_remove,
.id_table = wf_lm75_id,