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authorJean Delvare <khali@linux-fr.org>2008-07-16 13:30:14 -0400
committerJean Delvare <khali@mahadeva.delvare>2008-07-16 13:30:14 -0400
commita888420af07b9a26b6d518328baa913fb704e950 (patch)
treeb8d88c4e6837c007752d034fdccd6c3bddf44afa /drivers/hwmon/lm87.c
parentb6aacdcefac8ed60e77930b6e74129da6478e20e (diff)
hwmon: (lm87) Convert to a new-style i2c driver
The new-style lm87 driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers/hwmon/lm87.c')
-rw-r--r--drivers/hwmon/lm87.c99
1 files changed, 46 insertions, 53 deletions
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index e1c183f0aae0..21970f0d53a1 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -5,7 +5,7 @@
5 * Philip Edelbrock <phil@netroedge.com> 5 * Philip Edelbrock <phil@netroedge.com>
6 * Stephen Rousset <stephen.rousset@rocketlogix.com> 6 * Stephen Rousset <stephen.rousset@rocketlogix.com>
7 * Dan Eaton <dan.eaton@rocketlogix.com> 7 * Dan Eaton <dan.eaton@rocketlogix.com>
8 * Copyright (C) 2004,2007 Jean Delvare <khali@linux-fr.org> 8 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
9 * 9 *
10 * Original port to Linux 2.6 by Jeff Oliver. 10 * Original port to Linux 2.6 by Jeff Oliver.
11 * 11 *
@@ -157,22 +157,35 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
157 * Functions declaration 157 * Functions declaration
158 */ 158 */
159 159
160static int lm87_attach_adapter(struct i2c_adapter *adapter); 160static int lm87_probe(struct i2c_client *client,
161static int lm87_detect(struct i2c_adapter *adapter, int address, int kind); 161 const struct i2c_device_id *id);
162static int lm87_detect(struct i2c_client *new_client, int kind,
163 struct i2c_board_info *info);
162static void lm87_init_client(struct i2c_client *client); 164static void lm87_init_client(struct i2c_client *client);
163static int lm87_detach_client(struct i2c_client *client); 165static int lm87_remove(struct i2c_client *client);
164static struct lm87_data *lm87_update_device(struct device *dev); 166static struct lm87_data *lm87_update_device(struct device *dev);
165 167
166/* 168/*
167 * Driver data (common to all clients) 169 * Driver data (common to all clients)
168 */ 170 */
169 171
172static const struct i2c_device_id lm87_id[] = {
173 { "lm87", lm87 },
174 { "adm1024", adm1024 },
175 { }
176};
177MODULE_DEVICE_TABLE(i2c, lm87_id);
178
170static struct i2c_driver lm87_driver = { 179static struct i2c_driver lm87_driver = {
180 .class = I2C_CLASS_HWMON,
171 .driver = { 181 .driver = {
172 .name = "lm87", 182 .name = "lm87",
173 }, 183 },
174 .attach_adapter = lm87_attach_adapter, 184 .probe = lm87_probe,
175 .detach_client = lm87_detach_client, 185 .remove = lm87_remove,
186 .id_table = lm87_id,
187 .detect = lm87_detect,
188 .address_data = &addr_data,
176}; 189};
177 190
178/* 191/*
@@ -180,7 +193,6 @@ static struct i2c_driver lm87_driver = {
180 */ 193 */
181 194
182struct lm87_data { 195struct lm87_data {
183 struct i2c_client client;
184 struct device *hwmon_dev; 196 struct device *hwmon_dev;
185 struct mutex update_lock; 197 struct mutex update_lock;
186 char valid; /* zero until following fields are valid */ 198 char valid; /* zero until following fields are valid */
@@ -562,13 +574,6 @@ static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
562 * Real code 574 * Real code
563 */ 575 */
564 576
565static int lm87_attach_adapter(struct i2c_adapter *adapter)
566{
567 if (!(adapter->class & I2C_CLASS_HWMON))
568 return 0;
569 return i2c_probe(adapter, &addr_data, lm87_detect);
570}
571
572static struct attribute *lm87_attributes[] = { 577static struct attribute *lm87_attributes[] = {
573 &dev_attr_in1_input.attr, 578 &dev_attr_in1_input.attr,
574 &dev_attr_in1_min.attr, 579 &dev_attr_in1_min.attr,
@@ -656,33 +661,15 @@ static const struct attribute_group lm87_group_opt = {
656 .attrs = lm87_attributes_opt, 661 .attrs = lm87_attributes_opt,
657}; 662};
658 663
659/* 664/* Return 0 if detection is successful, -ENODEV otherwise */
660 * The following function does more than just detection. If detection 665static int lm87_detect(struct i2c_client *new_client, int kind,
661 * succeeds, it also registers the new chip. 666 struct i2c_board_info *info)
662 */
663static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
664{ 667{
665 struct i2c_client *new_client; 668 struct i2c_adapter *adapter = new_client->adapter;
666 struct lm87_data *data;
667 int err = 0;
668 static const char *names[] = { "lm87", "adm1024" }; 669 static const char *names[] = { "lm87", "adm1024" };
669 670
670 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 671 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
671 goto exit; 672 return -ENODEV;
672
673 if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) {
674 err = -ENOMEM;
675 goto exit;
676 }
677
678 /* The common I2C client data is placed right before the
679 LM87-specific data. */
680 new_client = &data->client;
681 i2c_set_clientdata(new_client, data);
682 new_client->addr = address;
683 new_client->adapter = adapter;
684 new_client->driver = &lm87_driver;
685 new_client->flags = 0;
686 673
687 /* Default to an LM87 if forced */ 674 /* Default to an LM87 if forced */
688 if (kind == 0) 675 if (kind == 0)
@@ -704,20 +691,32 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
704 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) { 691 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) {
705 dev_dbg(&adapter->dev, 692 dev_dbg(&adapter->dev,
706 "LM87 detection failed at 0x%02x.\n", 693 "LM87 detection failed at 0x%02x.\n",
707 address); 694 new_client->addr);
708 goto exit_free; 695 return -ENODEV;
709 } 696 }
710 } 697 }
711 698
712 /* We can fill in the remaining client fields */ 699 strlcpy(info->type, names[kind - 1], I2C_NAME_SIZE);
713 strlcpy(new_client->name, names[kind - 1], I2C_NAME_SIZE); 700
701 return 0;
702}
703
704static int lm87_probe(struct i2c_client *new_client,
705 const struct i2c_device_id *id)
706{
707 struct lm87_data *data;
708 int err;
709
710 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL);
711 if (!data) {
712 err = -ENOMEM;
713 goto exit;
714 }
715
716 i2c_set_clientdata(new_client, data);
714 data->valid = 0; 717 data->valid = 0;
715 mutex_init(&data->update_lock); 718 mutex_init(&data->update_lock);
716 719
717 /* Tell the I2C layer a new client has arrived */
718 if ((err = i2c_attach_client(new_client)))
719 goto exit_free;
720
721 /* Initialize the LM87 chip */ 720 /* Initialize the LM87 chip */
722 lm87_init_client(new_client); 721 lm87_init_client(new_client);
723 722
@@ -732,7 +731,7 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
732 731
733 /* Register sysfs hooks */ 732 /* Register sysfs hooks */
734 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) 733 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
735 goto exit_detach; 734 goto exit_free;
736 735
737 if (data->channel & CHAN_NO_FAN(0)) { 736 if (data->channel & CHAN_NO_FAN(0)) {
738 if ((err = device_create_file(&new_client->dev, 737 if ((err = device_create_file(&new_client->dev,
@@ -832,8 +831,6 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
832exit_remove: 831exit_remove:
833 sysfs_remove_group(&new_client->dev.kobj, &lm87_group); 832 sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
834 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); 833 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
835exit_detach:
836 i2c_detach_client(new_client);
837exit_free: 834exit_free:
838 kfree(data); 835 kfree(data);
839exit: 836exit:
@@ -877,18 +874,14 @@ static void lm87_init_client(struct i2c_client *client)
877 } 874 }
878} 875}
879 876
880static int lm87_detach_client(struct i2c_client *client) 877static int lm87_remove(struct i2c_client *client)
881{ 878{
882 struct lm87_data *data = i2c_get_clientdata(client); 879 struct lm87_data *data = i2c_get_clientdata(client);
883 int err;
884 880
885 hwmon_device_unregister(data->hwmon_dev); 881 hwmon_device_unregister(data->hwmon_dev);
886 sysfs_remove_group(&client->dev.kobj, &lm87_group); 882 sysfs_remove_group(&client->dev.kobj, &lm87_group);
887 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); 883 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
888 884
889 if ((err = i2c_detach_client(client)))
890 return err;
891
892 kfree(data); 885 kfree(data);
893 return 0; 886 return 0;
894} 887}