diff options
Diffstat (limited to 'drivers/hwmon/adt7x10.c')
| -rw-r--r-- | drivers/hwmon/adt7x10.c | 479 |
1 files changed, 208 insertions, 271 deletions
diff --git a/drivers/hwmon/adt7x10.c b/drivers/hwmon/adt7x10.c index e9d33aa78a19..ce54bffab2ec 100644 --- a/drivers/hwmon/adt7x10.c +++ b/drivers/hwmon/adt7x10.c @@ -8,16 +8,17 @@ * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.com> */ +#include <linux/device.h> #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/hwmon.h> -#include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/interrupt.h> +#include <linux/regmap.h> #include "adt7x10.h" @@ -53,80 +54,57 @@ /* Each client has this additional data */ struct adt7x10_data { - const struct adt7x10_ops *ops; - const char *name; - struct device *hwmon_dev; + struct regmap *regmap; struct mutex update_lock; u8 config; u8 oldconfig; - bool valid; /* true if registers valid */ - unsigned long last_updated; /* In jiffies */ - s16 temp[4]; /* Register values, - 0 = input - 1 = high - 2 = low - 3 = critical */ - u8 hyst; /* hysteresis offset */ + bool valid; /* true if temperature valid */ }; -static int adt7x10_read_byte(struct device *dev, u8 reg) -{ - struct adt7x10_data *d = dev_get_drvdata(dev); - return d->ops->read_byte(dev, reg); -} - -static int adt7x10_write_byte(struct device *dev, u8 reg, u8 data) -{ - struct adt7x10_data *d = dev_get_drvdata(dev); - return d->ops->write_byte(dev, reg, data); -} - -static int adt7x10_read_word(struct device *dev, u8 reg) -{ - struct adt7x10_data *d = dev_get_drvdata(dev); - return d->ops->read_word(dev, reg); -} - -static int adt7x10_write_word(struct device *dev, u8 reg, u16 data) -{ - struct adt7x10_data *d = dev_get_drvdata(dev); - return d->ops->write_word(dev, reg, data); -} +enum { + adt7x10_temperature = 0, + adt7x10_t_alarm_high, + adt7x10_t_alarm_low, + adt7x10_t_crit, +}; -static const u8 ADT7X10_REG_TEMP[4] = { - ADT7X10_TEMPERATURE, /* input */ - ADT7X10_T_ALARM_HIGH, /* high */ - ADT7X10_T_ALARM_LOW, /* low */ - ADT7X10_T_CRIT, /* critical */ +static const u8 ADT7X10_REG_TEMP[] = { + [adt7x10_temperature] = ADT7X10_TEMPERATURE, /* input */ + [adt7x10_t_alarm_high] = ADT7X10_T_ALARM_HIGH, /* high */ + [adt7x10_t_alarm_low] = ADT7X10_T_ALARM_LOW, /* low */ + [adt7x10_t_crit] = ADT7X10_T_CRIT, /* critical */ }; static irqreturn_t adt7x10_irq_handler(int irq, void *private) { struct device *dev = private; - int status; + struct adt7x10_data *d = dev_get_drvdata(dev); + unsigned int status; + int ret; - status = adt7x10_read_byte(dev, ADT7X10_STATUS); - if (status < 0) + ret = regmap_read(d->regmap, ADT7X10_STATUS, &status); + if (ret < 0) return IRQ_HANDLED; if (status & ADT7X10_STAT_T_HIGH) - sysfs_notify(&dev->kobj, NULL, "temp1_max_alarm"); + hwmon_notify_event(dev, hwmon_temp, hwmon_temp_max_alarm, 0); if (status & ADT7X10_STAT_T_LOW) - sysfs_notify(&dev->kobj, NULL, "temp1_min_alarm"); + hwmon_notify_event(dev, hwmon_temp, hwmon_temp_min_alarm, 0); if (status & ADT7X10_STAT_T_CRIT) - sysfs_notify(&dev->kobj, NULL, "temp1_crit_alarm"); + hwmon_notify_event(dev, hwmon_temp, hwmon_temp_crit_alarm, 0); return IRQ_HANDLED; } -static int adt7x10_temp_ready(struct device *dev) +static int adt7x10_temp_ready(struct regmap *regmap) { - int i, status; + unsigned int status; + int i, ret; for (i = 0; i < 6; i++) { - status = adt7x10_read_byte(dev, ADT7X10_STATUS); - if (status < 0) - return status; + ret = regmap_read(regmap, ADT7X10_STATUS, &status); + if (ret < 0) + return ret; if (!(status & ADT7X10_STAT_NOT_RDY)) return 0; msleep(60); @@ -134,71 +112,10 @@ static int adt7x10_temp_ready(struct device *dev) return -ETIMEDOUT; } -static int adt7x10_update_temp(struct device *dev) -{ - struct adt7x10_data *data = dev_get_drvdata(dev); - int ret = 0; - - mutex_lock(&data->update_lock); - - if (time_after(jiffies, data->last_updated + HZ + HZ / 2) - || !data->valid) { - int temp; - - dev_dbg(dev, "Starting update\n"); - - ret = adt7x10_temp_ready(dev); /* check for new value */ - if (ret) - goto abort; - - temp = adt7x10_read_word(dev, ADT7X10_REG_TEMP[0]); - if (temp < 0) { - ret = temp; - dev_dbg(dev, "Failed to read value: reg %d, error %d\n", - ADT7X10_REG_TEMP[0], ret); - goto abort; - } - data->temp[0] = temp; - data->last_updated = jiffies; - data->valid = true; - } - -abort: - mutex_unlock(&data->update_lock); - return ret; -} - -static int adt7x10_fill_cache(struct device *dev) -{ - struct adt7x10_data *data = dev_get_drvdata(dev); - int ret; - int i; - - for (i = 1; i < ARRAY_SIZE(data->temp); i++) { - ret = adt7x10_read_word(dev, ADT7X10_REG_TEMP[i]); - if (ret < 0) { - dev_dbg(dev, "Failed to read value: reg %d, error %d\n", - ADT7X10_REG_TEMP[i], ret); - return ret; - } - data->temp[i] = ret; - } - - ret = adt7x10_read_byte(dev, ADT7X10_T_HYST); - if (ret < 0) { - dev_dbg(dev, "Failed to read value: reg %d, error %d\n", - ADT7X10_T_HYST, ret); - return ret; - } - data->hyst = ret; - - return 0; -} - static s16 ADT7X10_TEMP_TO_REG(long temp) { return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7X10_TEMP_MIN, - ADT7X10_TEMP_MAX) * 128, 1000); + ADT7X10_TEMP_MAX) * 128, 1000); } static int ADT7X10_REG_TO_TEMP(struct adt7x10_data *data, s16 reg) @@ -215,170 +132,233 @@ static int ADT7X10_REG_TO_TEMP(struct adt7x10_data *data, s16 reg) /*-----------------------------------------------------------------------*/ -/* sysfs attributes for hwmon */ - -static ssize_t adt7x10_temp_show(struct device *dev, - struct device_attribute *da, char *buf) +static int adt7x10_temp_read(struct adt7x10_data *data, int index, long *val) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct adt7x10_data *data = dev_get_drvdata(dev); - - - if (attr->index == 0) { - int ret; + unsigned int regval; + int ret; - ret = adt7x10_update_temp(dev); - if (ret) + mutex_lock(&data->update_lock); + if (index == adt7x10_temperature && !data->valid) { + /* wait for valid temperature */ + ret = adt7x10_temp_ready(data->regmap); + if (ret) { + mutex_unlock(&data->update_lock); return ret; + } + data->valid = true; } + mutex_unlock(&data->update_lock); - return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, - data->temp[attr->index])); + ret = regmap_read(data->regmap, ADT7X10_REG_TEMP[index], ®val); + if (ret) + return ret; + + *val = ADT7X10_REG_TO_TEMP(data, regval); + return 0; } -static ssize_t adt7x10_temp_store(struct device *dev, - struct device_attribute *da, - const char *buf, size_t count) +static int adt7x10_temp_write(struct adt7x10_data *data, int index, long temp) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct adt7x10_data *data = dev_get_drvdata(dev); - int nr = attr->index; - long temp; int ret; - ret = kstrtol(buf, 10, &temp); - if (ret) - return ret; - mutex_lock(&data->update_lock); - data->temp[nr] = ADT7X10_TEMP_TO_REG(temp); - ret = adt7x10_write_word(dev, ADT7X10_REG_TEMP[nr], data->temp[nr]); - if (ret) - count = ret; + ret = regmap_write(data->regmap, ADT7X10_REG_TEMP[index], + ADT7X10_TEMP_TO_REG(temp)); mutex_unlock(&data->update_lock); - return count; + return ret; } -static ssize_t adt7x10_t_hyst_show(struct device *dev, - struct device_attribute *da, char *buf) +static int adt7x10_hyst_read(struct adt7x10_data *data, int index, long *val) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct adt7x10_data *data = dev_get_drvdata(dev); - int nr = attr->index; - int hyst; + int hyst, temp, ret; + + mutex_lock(&data->update_lock); + ret = regmap_read(data->regmap, ADT7X10_T_HYST, &hyst); + if (ret) { + mutex_unlock(&data->update_lock); + return ret; + } + + ret = regmap_read(data->regmap, ADT7X10_REG_TEMP[index], &temp); + mutex_unlock(&data->update_lock); + if (ret) + return ret; - hyst = (data->hyst & ADT7X10_T_HYST_MASK) * 1000; + hyst = (hyst & ADT7X10_T_HYST_MASK) * 1000; /* * hysteresis is stored as a 4 bit offset in the device, convert it * to an absolute value */ - if (nr == 2) /* min has positive offset, others have negative */ + /* min has positive offset, others have negative */ + if (index == adt7x10_t_alarm_low) hyst = -hyst; - return sprintf(buf, "%d\n", - ADT7X10_REG_TO_TEMP(data, data->temp[nr]) - hyst); + + *val = ADT7X10_REG_TO_TEMP(data, temp) - hyst; + return 0; } -static ssize_t adt7x10_t_hyst_store(struct device *dev, - struct device_attribute *da, - const char *buf, size_t count) +static int adt7x10_hyst_write(struct adt7x10_data *data, long hyst) { - struct adt7x10_data *data = dev_get_drvdata(dev); + unsigned int regval; int limit, ret; - long hyst; - ret = kstrtol(buf, 10, &hyst); - if (ret) - return ret; + mutex_lock(&data->update_lock); + /* convert absolute hysteresis value to a 4 bit delta value */ - limit = ADT7X10_REG_TO_TEMP(data, data->temp[1]); - hyst = clamp_val(hyst, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX); - data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), - 0, ADT7X10_T_HYST_MASK); - ret = adt7x10_write_byte(dev, ADT7X10_T_HYST, data->hyst); - if (ret) - return ret; + ret = regmap_read(data->regmap, ADT7X10_T_ALARM_HIGH, ®val); + if (ret < 0) + goto abort; + + limit = ADT7X10_REG_TO_TEMP(data, regval); - return count; + hyst = clamp_val(hyst, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX); + regval = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), 0, + ADT7X10_T_HYST_MASK); + ret = regmap_write(data->regmap, ADT7X10_T_HYST, regval); +abort: + mutex_unlock(&data->update_lock); + return ret; } -static ssize_t adt7x10_alarm_show(struct device *dev, - struct device_attribute *da, char *buf) +static int adt7x10_alarm_read(struct adt7x10_data *data, int index, long *val) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + unsigned int status; int ret; - ret = adt7x10_read_byte(dev, ADT7X10_STATUS); + ret = regmap_read(data->regmap, ADT7X10_STATUS, &status); if (ret < 0) return ret; - return sprintf(buf, "%d\n", !!(ret & attr->index)); + *val = !!(status & index); + + return 0; +} + +static umode_t adt7x10_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (attr) { + case hwmon_temp_max: + case hwmon_temp_min: + case hwmon_temp_crit: + case hwmon_temp_max_hyst: + return 0644; + case hwmon_temp_input: + case hwmon_temp_min_alarm: + case hwmon_temp_max_alarm: + case hwmon_temp_crit_alarm: + case hwmon_temp_min_hyst: + case hwmon_temp_crit_hyst: + return 0444; + default: + break; + } + + return 0; } -static ssize_t name_show(struct device *dev, struct device_attribute *da, - char *buf) +static int adt7x10_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) { struct adt7x10_data *data = dev_get_drvdata(dev); - return sprintf(buf, "%s\n", data->name); + switch (attr) { + case hwmon_temp_input: + return adt7x10_temp_read(data, adt7x10_temperature, val); + case hwmon_temp_max: + return adt7x10_temp_read(data, adt7x10_t_alarm_high, val); + case hwmon_temp_min: + return adt7x10_temp_read(data, adt7x10_t_alarm_low, val); + case hwmon_temp_crit: + return adt7x10_temp_read(data, adt7x10_t_crit, val); + case hwmon_temp_max_hyst: + return adt7x10_hyst_read(data, adt7x10_t_alarm_high, val); + case hwmon_temp_min_hyst: + return adt7x10_hyst_read(data, adt7x10_t_alarm_low, val); + case hwmon_temp_crit_hyst: + return adt7x10_hyst_read(data, adt7x10_t_crit, val); + case hwmon_temp_min_alarm: + return adt7x10_alarm_read(data, ADT7X10_STAT_T_LOW, val); + case hwmon_temp_max_alarm: + return adt7x10_alarm_read(data, ADT7X10_STAT_T_HIGH, val); + case hwmon_temp_crit_alarm: + return adt7x10_alarm_read(data, ADT7X10_STAT_T_CRIT, val); + default: + return -EOPNOTSUPP; + } } -static SENSOR_DEVICE_ATTR_RO(temp1_input, adt7x10_temp, 0); -static SENSOR_DEVICE_ATTR_RW(temp1_max, adt7x10_temp, 1); -static SENSOR_DEVICE_ATTR_RW(temp1_min, adt7x10_temp, 2); -static SENSOR_DEVICE_ATTR_RW(temp1_crit, adt7x10_temp, 3); -static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, adt7x10_t_hyst, 1); -static SENSOR_DEVICE_ATTR_RO(temp1_min_hyst, adt7x10_t_hyst, 2); -static SENSOR_DEVICE_ATTR_RO(temp1_crit_hyst, adt7x10_t_hyst, 3); -static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, adt7x10_alarm, - ADT7X10_STAT_T_LOW); -static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, adt7x10_alarm, - ADT7X10_STAT_T_HIGH); -static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, adt7x10_alarm, - ADT7X10_STAT_T_CRIT); -static DEVICE_ATTR_RO(name); - -static struct attribute *adt7x10_attributes[] = { - &sensor_dev_attr_temp1_input.dev_attr.attr, - &sensor_dev_attr_temp1_max.dev_attr.attr, - &sensor_dev_attr_temp1_min.dev_attr.attr, - &sensor_dev_attr_temp1_crit.dev_attr.attr, - &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, - &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, - &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, - NULL +static int adt7x10_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + + switch (attr) { + case hwmon_temp_max: + return adt7x10_temp_write(data, adt7x10_t_alarm_high, val); + case hwmon_temp_min: + return adt7x10_temp_write(data, adt7x10_t_alarm_low, val); + case hwmon_temp_crit: + return adt7x10_temp_write(data, adt7x10_t_crit, val); + case hwmon_temp_max_hyst: + return adt7x10_hyst_write(data, val); + default: + return -EOPNOTSUPP; + } +} + +static const struct hwmon_channel_info *adt7x10_info[] = { + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN | + HWMON_T_CRIT | HWMON_T_MAX_HYST | HWMON_T_MIN_HYST | + HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM), + NULL, +}; + +static const struct hwmon_ops adt7x10_hwmon_ops = { + .is_visible = adt7x10_is_visible, + .read = adt7x10_read, + .write = adt7x10_write, }; -static const struct attribute_group adt7x10_group = { - .attrs = adt7x10_attributes, +static const struct hwmon_chip_info adt7x10_chip_info = { + .ops = &adt7x10_hwmon_ops, + .info = adt7x10_info, }; +static void adt7x10_restore_config(void *private) +{ + struct adt7x10_data *data = private; + + regmap_write(data->regmap, ADT7X10_CONFIG, data->oldconfig); +} + int adt7x10_probe(struct device *dev, const char *name, int irq, - const struct adt7x10_ops *ops) + struct regmap *regmap) { struct adt7x10_data *data; + unsigned int config; + struct device *hdev; int ret; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; - data->ops = ops; - data->name = name; + data->regmap = regmap; dev_set_drvdata(dev, data); mutex_init(&data->update_lock); /* configure as specified */ - ret = adt7x10_read_byte(dev, ADT7X10_CONFIG); + ret = regmap_read(regmap, ADT7X10_CONFIG, &config); if (ret < 0) { dev_dbg(dev, "Can't read config? %d\n", ret); return ret; } - data->oldconfig = ret; + data->oldconfig = config; /* * Set to 16 bit resolution, continous conversion and comparator mode. @@ -389,92 +369,49 @@ int adt7x10_probe(struct device *dev, const char *name, int irq, data->config |= ADT7X10_FULL | ADT7X10_RESOLUTION | ADT7X10_EVENT_MODE; if (data->config != data->oldconfig) { - ret = adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config); + ret = regmap_write(regmap, ADT7X10_CONFIG, data->config); if (ret) return ret; - } - dev_dbg(dev, "Config %02x\n", data->config); - - ret = adt7x10_fill_cache(dev); - if (ret) - goto exit_restore; - - /* Register sysfs hooks */ - ret = sysfs_create_group(&dev->kobj, &adt7x10_group); - if (ret) - goto exit_restore; - - /* - * The I2C device will already have it's own 'name' attribute, but for - * the SPI device we need to register it. name will only be non NULL if - * the device doesn't register the 'name' attribute on its own. - */ - if (name) { - ret = device_create_file(dev, &dev_attr_name); + ret = devm_add_action_or_reset(dev, adt7x10_restore_config, data); if (ret) - goto exit_remove; + return ret; } + dev_dbg(dev, "Config %02x\n", data->config); - data->hwmon_dev = hwmon_device_register(dev); - if (IS_ERR(data->hwmon_dev)) { - ret = PTR_ERR(data->hwmon_dev); - goto exit_remove_name; - } + hdev = devm_hwmon_device_register_with_info(dev, name, data, + &adt7x10_chip_info, NULL); + if (IS_ERR(hdev)) + return PTR_ERR(hdev); if (irq > 0) { - ret = request_threaded_irq(irq, NULL, adt7x10_irq_handler, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT, - dev_name(dev), dev); + ret = devm_request_threaded_irq(dev, irq, NULL, + adt7x10_irq_handler, + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + dev_name(dev), hdev); if (ret) - goto exit_hwmon_device_unregister; + return ret; } return 0; - -exit_hwmon_device_unregister: - hwmon_device_unregister(data->hwmon_dev); -exit_remove_name: - if (name) - device_remove_file(dev, &dev_attr_name); -exit_remove: - sysfs_remove_group(&dev->kobj, &adt7x10_group); -exit_restore: - adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig); - return ret; } EXPORT_SYMBOL_GPL(adt7x10_probe); -void adt7x10_remove(struct device *dev, int irq) -{ - struct adt7x10_data *data = dev_get_drvdata(dev); - - if (irq > 0) - free_irq(irq, dev); - - hwmon_device_unregister(data->hwmon_dev); - if (data->name) - device_remove_file(dev, &dev_attr_name); - sysfs_remove_group(&dev->kobj, &adt7x10_group); - if (data->oldconfig != data->config) - adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig); -} -EXPORT_SYMBOL_GPL(adt7x10_remove); - #ifdef CONFIG_PM_SLEEP static int adt7x10_suspend(struct device *dev) { struct adt7x10_data *data = dev_get_drvdata(dev); - return adt7x10_write_byte(dev, ADT7X10_CONFIG, - data->config | ADT7X10_PD); + return regmap_write(data->regmap, ADT7X10_CONFIG, + data->config | ADT7X10_PD); } static int adt7x10_resume(struct device *dev) { struct adt7x10_data *data = dev_get_drvdata(dev); - return adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config); + return regmap_write(data->regmap, ADT7X10_CONFIG, data->config); } SIMPLE_DEV_PM_OPS(adt7x10_dev_pm_ops, adt7x10_suspend, adt7x10_resume); |