diff options
Diffstat (limited to 'drivers/hwmon/ltc4261.c')
| -rw-r--r-- | drivers/hwmon/ltc4261.c | 122 |
1 files changed, 37 insertions, 85 deletions
diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c index 4b50601027d..0becd69842b 100644 --- a/drivers/hwmon/ltc4261.c +++ b/drivers/hwmon/ltc4261.c @@ -33,6 +33,7 @@ #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> +#include <linux/jiffies.h> /* chip registers */ #define LTC4261_STATUS 0x00 /* readonly */ @@ -54,7 +55,7 @@ #define FAULT_OC (1<<2) struct ltc4261_data { - struct device *hwmon_dev; + struct i2c_client *client; struct mutex update_lock; bool valid; @@ -66,8 +67,8 @@ struct ltc4261_data { static struct ltc4261_data *ltc4261_update_device(struct device *dev) { - struct i2c_client *client = to_i2c_client(dev); - struct ltc4261_data *data = i2c_get_clientdata(client); + struct ltc4261_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; struct ltc4261_data *ret = data; mutex_lock(&data->update_lock); @@ -85,6 +86,7 @@ static struct ltc4261_data *ltc4261_update_device(struct device *dev) "Failed to read ADC value: error %d\n", val); ret = ERR_PTR(val); + data->valid = 0; goto abort; } data->regs[i] = val; @@ -148,7 +150,6 @@ static ssize_t ltc4261_show_bool(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct i2c_client *client = to_i2c_client(dev); struct ltc4261_data *data = ltc4261_update_device(dev); u8 fault; @@ -157,30 +158,18 @@ static ssize_t ltc4261_show_bool(struct device *dev, fault = data->regs[LTC4261_FAULT] & attr->index; if (fault) /* Clear reported faults in chip register */ - i2c_smbus_write_byte_data(client, LTC4261_FAULT, ~fault); + i2c_smbus_write_byte_data(data->client, LTC4261_FAULT, ~fault); return snprintf(buf, PAGE_SIZE, "%d\n", fault ? 1 : 0); } /* - * These macros are used below in constructing device attribute objects - * for use with sysfs_create_group() to make a sysfs device file - * for each register. - */ - -#define LTC4261_VALUE(name, ltc4261_cmd_idx) \ - static SENSOR_DEVICE_ATTR(name, S_IRUGO, \ - ltc4261_show_value, NULL, ltc4261_cmd_idx) - -#define LTC4261_BOOL(name, mask) \ - static SENSOR_DEVICE_ATTR(name, S_IRUGO, \ - ltc4261_show_bool, NULL, (mask)) - -/* * Input voltages. */ -LTC4261_VALUE(in1_input, LTC4261_ADIN_H); -LTC4261_VALUE(in2_input, LTC4261_ADIN2_H); +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ltc4261_show_value, NULL, + LTC4261_ADIN_H); +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, ltc4261_show_value, NULL, + LTC4261_ADIN2_H); /* * Voltage alarms. The chip has only one set of voltage alarm status bits, @@ -190,18 +179,24 @@ LTC4261_VALUE(in2_input, LTC4261_ADIN2_H); * To ensure that the alarm condition is reported to the user, report it * with both voltage sensors. */ -LTC4261_BOOL(in1_min_alarm, FAULT_UV); -LTC4261_BOOL(in1_max_alarm, FAULT_OV); -LTC4261_BOOL(in2_min_alarm, FAULT_UV); -LTC4261_BOOL(in2_max_alarm, FAULT_OV); +static SENSOR_DEVICE_ATTR(in1_min_alarm, S_IRUGO, ltc4261_show_bool, NULL, + FAULT_UV); +static SENSOR_DEVICE_ATTR(in1_max_alarm, S_IRUGO, ltc4261_show_bool, NULL, + FAULT_OV); +static SENSOR_DEVICE_ATTR(in2_min_alarm, S_IRUGO, ltc4261_show_bool, NULL, + FAULT_UV); +static SENSOR_DEVICE_ATTR(in2_max_alarm, S_IRUGO, ltc4261_show_bool, NULL, + FAULT_OV); /* Currents (via sense resistor) */ -LTC4261_VALUE(curr1_input, LTC4261_SENSE_H); +static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4261_show_value, NULL, + LTC4261_SENSE_H); /* Overcurrent alarm */ -LTC4261_BOOL(curr1_max_alarm, FAULT_OC); +static SENSOR_DEVICE_ATTR(curr1_max_alarm, S_IRUGO, ltc4261_show_bool, NULL, + FAULT_OC); -static struct attribute *ltc4261_attributes[] = { +static struct attribute *ltc4261_attrs[] = { &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in1_min_alarm.dev_attr.attr, &sensor_dev_attr_in1_max_alarm.dev_attr.attr, @@ -214,69 +209,38 @@ static struct attribute *ltc4261_attributes[] = { NULL, }; - -static const struct attribute_group ltc4261_group = { - .attrs = ltc4261_attributes, -}; +ATTRIBUTE_GROUPS(ltc4261); static int ltc4261_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct i2c_adapter *adapter = client->adapter; + struct device *dev = &client->dev; struct ltc4261_data *data; - int ret; + struct device *hwmon_dev; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; if (i2c_smbus_read_byte_data(client, LTC4261_STATUS) < 0) { - dev_err(&client->dev, "Failed to read status register\n"); + dev_err(dev, "Failed to read status register\n"); return -ENODEV; } - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) { - ret = -ENOMEM; - goto out_kzalloc; - } + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; - i2c_set_clientdata(client, data); + data->client = client; mutex_init(&data->update_lock); /* Clear faults */ i2c_smbus_write_byte_data(client, LTC4261_FAULT, 0x00); - /* Register sysfs hooks */ - ret = sysfs_create_group(&client->dev.kobj, <c4261_group); - if (ret) - goto out_sysfs_create_group; - - data->hwmon_dev = hwmon_device_register(&client->dev); - if (IS_ERR(data->hwmon_dev)) { - ret = PTR_ERR(data->hwmon_dev); - goto out_hwmon_device_register; - } - - return 0; - -out_hwmon_device_register: - sysfs_remove_group(&client->dev.kobj, <c4261_group); -out_sysfs_create_group: - kfree(data); -out_kzalloc: - return ret; -} - -static int ltc4261_remove(struct i2c_client *client) -{ - struct ltc4261_data *data = i2c_get_clientdata(client); - - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, <c4261_group); - - kfree(data); - - return 0; + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, + ltc4261_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); } static const struct i2c_device_id ltc4261_id[] = { @@ -292,23 +256,11 @@ static struct i2c_driver ltc4261_driver = { .name = "ltc4261", }, .probe = ltc4261_probe, - .remove = ltc4261_remove, .id_table = ltc4261_id, }; -static int __init ltc4261_init(void) -{ - return i2c_add_driver(<c4261_driver); -} - -static void __exit ltc4261_exit(void) -{ - i2c_del_driver(<c4261_driver); -} +module_i2c_driver(ltc4261_driver); -MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>"); +MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); MODULE_DESCRIPTION("LTC4261 driver"); MODULE_LICENSE("GPL"); - -module_init(ltc4261_init); -module_exit(ltc4261_exit); |