From 00a0c905ab4b2b47372be8da6a8442dcd3681903 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Wed, 26 Oct 2016 10:56:59 -0600 Subject: hwmon: (lm87) Use hwmon to create the sysfs groups This is the expected thing for a hwmon driver to do, this changes the sysfs paths from, say: /sys/bus/i2c/devices/0-002c/temp1_input to: /sys/bus/i2c/devices/0-002c/hwmon/hwmon0/temp1_input Signed-off-by: Jason Gunthorpe Signed-off-by: Guenter Roeck --- drivers/hwmon/lm87.c | 134 +++++++++++++++++++-------------------------------- 1 file changed, 50 insertions(+), 84 deletions(-) (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c index a5e295826aea..81cb898245a1 100644 --- a/drivers/hwmon/lm87.c +++ b/drivers/hwmon/lm87.c @@ -154,7 +154,6 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; */ struct lm87_data { - struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* In jiffies */ @@ -181,6 +180,8 @@ struct lm87_data { u16 alarms; /* register values, combined */ u8 vid; /* register values, combined */ u8 vrm; + + const struct attribute_group *attr_groups[6]; }; static inline int lm87_read_value(struct i2c_client *client, u8 reg) @@ -195,7 +196,7 @@ static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) static struct lm87_data *lm87_update_device(struct device *dev) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); mutex_lock(&data->update_lock); @@ -309,7 +310,7 @@ static ssize_t show_in_max(struct device *dev, static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; @@ -330,7 +331,7 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; @@ -396,7 +397,7 @@ static ssize_t show_temp_high(struct device *dev, static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; @@ -416,7 +417,7 @@ static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr, static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; @@ -495,7 +496,7 @@ static ssize_t show_fan_div(struct device *dev, static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; @@ -522,7 +523,7 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); int nr = to_sensor_dev_attr(attr)->index; long val; @@ -635,7 +636,7 @@ static ssize_t show_aout(struct device *dev, struct device_attribute *attr, static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); + struct i2c_client *client = dev_get_drvdata(dev); struct lm87_data *data = i2c_get_clientdata(client); long val; int err; @@ -841,23 +842,18 @@ static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info) return 0; } -static void lm87_remove_files(struct i2c_client *client) +static void lm87_restore_config(void *arg) { - struct device *dev = &client->dev; - - sysfs_remove_group(&dev->kobj, &lm87_group); - sysfs_remove_group(&dev->kobj, &lm87_group_in6); - sysfs_remove_group(&dev->kobj, &lm87_group_fan1); - sysfs_remove_group(&dev->kobj, &lm87_group_in7); - sysfs_remove_group(&dev->kobj, &lm87_group_fan2); - sysfs_remove_group(&dev->kobj, &lm87_group_temp3); - sysfs_remove_group(&dev->kobj, &lm87_group_in0_5); - sysfs_remove_group(&dev->kobj, &lm87_group_vid); + struct i2c_client *client = arg; + struct lm87_data *data = i2c_get_clientdata(client); + + lm87_write_value(client, LM87_REG_CONFIG, data->config); } -static void lm87_init_client(struct i2c_client *client) +static int lm87_init_client(struct i2c_client *client) { struct lm87_data *data = i2c_get_clientdata(client); + int rc; if (dev_get_platdata(&client->dev)) { data->channel = *(u8 *)dev_get_platdata(&client->dev); @@ -868,6 +864,10 @@ static void lm87_init_client(struct i2c_client *client) } data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; + rc = devm_add_action(&client->dev, lm87_restore_config, client); + if (rc) + return rc; + if (!(data->config & 0x01)) { int i; @@ -895,12 +895,15 @@ static void lm87_init_client(struct i2c_client *client) if ((data->config & 0x09) != 0x01) lm87_write_value(client, LM87_REG_CONFIG, (data->config & 0x77) | 0x01); + return 0; } static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct lm87_data *data; + struct device *hwmon_dev; int err; + unsigned int group_tail = 0; data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL); if (!data) @@ -910,7 +913,9 @@ static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id) mutex_init(&data->update_lock); /* Initialize the LM87 chip */ - lm87_init_client(client); + err = lm87_init_client(client); + if (err) + return err; data->in_scale[0] = 2500; data->in_scale[1] = 2700; @@ -921,72 +926,34 @@ static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id) data->in_scale[6] = 1875; data->in_scale[7] = 1875; - /* Register sysfs hooks */ - err = sysfs_create_group(&client->dev.kobj, &lm87_group); - if (err) - goto exit_stop; - - if (data->channel & CHAN_NO_FAN(0)) { - err = sysfs_create_group(&client->dev.kobj, &lm87_group_in6); - if (err) - goto exit_remove; - } else { - err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan1); - if (err) - goto exit_remove; - } - - if (data->channel & CHAN_NO_FAN(1)) { - err = sysfs_create_group(&client->dev.kobj, &lm87_group_in7); - if (err) - goto exit_remove; - } else { - err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan2); - if (err) - goto exit_remove; - } - - if (data->channel & CHAN_TEMP3) { - err = sysfs_create_group(&client->dev.kobj, &lm87_group_temp3); - if (err) - goto exit_remove; - } else { - err = sysfs_create_group(&client->dev.kobj, &lm87_group_in0_5); - if (err) - goto exit_remove; - } + /* + * Construct the list of attributes, the list depends on the + * configuration of the chip + */ + data->attr_groups[group_tail++] = &lm87_group; + if (data->channel & CHAN_NO_FAN(0)) + data->attr_groups[group_tail++] = &lm87_group_in6; + else + data->attr_groups[group_tail++] = &lm87_group_fan1; + + if (data->channel & CHAN_NO_FAN(1)) + data->attr_groups[group_tail++] = &lm87_group_in7; + else + data->attr_groups[group_tail++] = &lm87_group_fan2; + + if (data->channel & CHAN_TEMP3) + data->attr_groups[group_tail++] = &lm87_group_temp3; + else + data->attr_groups[group_tail++] = &lm87_group_in0_5; if (!(data->channel & CHAN_NO_VID)) { data->vrm = vid_which_vrm(); - err = sysfs_create_group(&client->dev.kobj, &lm87_group_vid); - if (err) - goto exit_remove; - } - - data->hwmon_dev = hwmon_device_register(&client->dev); - if (IS_ERR(data->hwmon_dev)) { - err = PTR_ERR(data->hwmon_dev); - goto exit_remove; + data->attr_groups[group_tail++] = &lm87_group_vid; } - return 0; - -exit_remove: - lm87_remove_files(client); -exit_stop: - lm87_write_value(client, LM87_REG_CONFIG, data->config); - return err; -} - -static int lm87_remove(struct i2c_client *client) -{ - struct lm87_data *data = i2c_get_clientdata(client); - - hwmon_device_unregister(data->hwmon_dev); - lm87_remove_files(client); - - lm87_write_value(client, LM87_REG_CONFIG, data->config); - return 0; + hwmon_dev = devm_hwmon_device_register_with_groups( + &client->dev, client->name, client, data->attr_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); } /* @@ -1006,7 +973,6 @@ static struct i2c_driver lm87_driver = { .name = "lm87", }, .probe = lm87_probe, - .remove = lm87_remove, .id_table = lm87_id, .detect = lm87_detect, .address_list = normal_i2c, -- cgit v1.2.3