diff options
Diffstat (limited to 'drivers/hwmon/lm95245.c')
| -rw-r--r-- | drivers/hwmon/lm95245.c | 134 |
1 files changed, 108 insertions, 26 deletions
diff --git a/drivers/hwmon/lm95245.c b/drivers/hwmon/lm95245.c index dce9e68241e6..1b60fe6de776 100644 --- a/drivers/hwmon/lm95245.c +++ b/drivers/hwmon/lm95245.c @@ -34,6 +34,8 @@ #include <linux/mutex.h> #include <linux/sysfs.h> +#include <linux/lm95245.h> + #define DEVNAME "lm95245" static const unsigned short normal_i2c[] = { @@ -93,6 +95,7 @@ static const unsigned short normal_i2c[] = { #define RATE_CR1000 0x02 #define RATE_CR2500 0x03 +#define STATUS1_ROS 0x10 #define STATUS1_DIODE_FAULT 0x04 #define STATUS1_RTCRIT 0x02 #define STATUS1_LOC 0x01 @@ -107,12 +110,32 @@ static const u8 lm95245_reg_address[] = { LM95245_REG_R_REMOTE_TEMPL_S, LM95245_REG_R_REMOTE_TEMPH_U, LM95245_REG_R_REMOTE_TEMPL_U, + LM95245_REG_RW_REMOTE_OS_LIMIT, LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT, LM95245_REG_RW_REMOTE_TCRIT_LIMIT, LM95245_REG_RW_COMMON_HYSTERESIS, LM95245_REG_R_STATUS1, }; +/* Indices and offsets into above register array */ + +enum { + INDEX_LOCAL_TEMP = 0, + INDEX_REMOTE_TEMP = 2, + INDEX_REMOTE_OS_LIMIT = 6, + INDEX_LOCAL_OS_TCRIT_LIMIT, + INDEX_REMOTE_TCRIT_LIMIT, + INDEX_COMMON_HYSTERESIS, + INDEX_STATUS1, +}; + +enum { + OFFSET_HIGH_SIGNED = 0, + OFFSET_LOW_SIGNED, + OFFSET_HIGH_UNSIGNED, + OFFSET_LOW_UNSIGNED, +}; + /* Client data (each client gets its own) */ struct lm95245_data { struct device *hwmon_dev; @@ -214,24 +237,42 @@ static unsigned long lm95245_set_conversion_rate(struct i2c_client *client, } /* Sysfs stuff */ -static ssize_t show_input(struct device *dev, struct device_attribute *attr, - char *buf) +void thermal_get_temp(struct device *dev, int *temp, int index) { struct lm95245_data *data = lm95245_update_device(dev); - int temp; - int index = to_sensor_dev_attr(attr)->index; /* - * Index 0 (Local temp) is always signed - * Index 2 (Remote temp) has both signed and unsigned data + * Local temp is always signed + * Remote temp has both signed and unsigned data * use signed calculation for remote if signed bit is set */ - if (index == 0 || data->regs[index] & 0x80) - temp = temp_from_reg_signed(data->regs[index], - data->regs[index + 1]); + if (index == INDEX_LOCAL_TEMP || data->regs[index + OFFSET_HIGH_SIGNED] & 0x80) + *temp = temp_from_reg_signed(data->regs[index + OFFSET_HIGH_SIGNED], + data->regs[index + OFFSET_LOW_SIGNED]); else - temp = temp_from_reg_unsigned(data->regs[index + 2], - data->regs[index + 3]); + *temp = temp_from_reg_unsigned(data->regs[index + OFFSET_HIGH_UNSIGNED], + data->regs[index + OFFSET_LOW_UNSIGNED]); +} + +void lm95245_get_local_temp(struct device *dev, int *temp) +{ + thermal_get_temp(dev, temp, INDEX_LOCAL_TEMP); +} +EXPORT_SYMBOL(lm95245_get_local_temp); + +void lm95245_get_remote_temp(struct device *dev, int *temp) +{ + thermal_get_temp(dev, temp, INDEX_REMOTE_TEMP); +} +EXPORT_SYMBOL(lm95245_get_remote_temp); + +static ssize_t show_input(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int temp = 0; + int index = to_sensor_dev_attr(attr)->index; + + thermal_get_temp(dev, &temp, index); return snprintf(buf, PAGE_SIZE - 1, "%d\n", temp); } @@ -246,20 +287,14 @@ static ssize_t show_limit(struct device *dev, struct device_attribute *attr, data->regs[index] * 1000); } -static ssize_t set_limit(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +void thermal_set_limit(struct device *dev, int val, int index) { struct i2c_client *client = to_i2c_client(dev); struct lm95245_data *data = i2c_get_clientdata(client); - int index = to_sensor_dev_attr(attr)->index; - unsigned long val; - - if (strict_strtoul(buf, 10, &val) < 0) - return -EINVAL; val /= 1000; - val = SENSORS_LIMIT(val, 0, (index == 6 ? 127 : 255)); + val = SENSORS_LIMIT(val, 0, (index == INDEX_LOCAL_OS_TCRIT_LIMIT ? 127 : 255)); mutex_lock(&data->update_lock); @@ -268,6 +303,36 @@ static ssize_t set_limit(struct device *dev, struct device_attribute *attr, i2c_smbus_write_byte_data(client, lm95245_reg_address[index], val); mutex_unlock(&data->update_lock); +} + +void lm95245_set_remote_os_limit(struct device *dev, int val) +{ + thermal_set_limit(dev, val, INDEX_REMOTE_OS_LIMIT); +} +EXPORT_SYMBOL(lm95245_set_remote_os_limit); + +void lm95245_set_remote_critical_limit(struct device *dev, int val) +{ + thermal_set_limit(dev, val, INDEX_REMOTE_TCRIT_LIMIT); +} +EXPORT_SYMBOL(lm95245_set_remote_critical_limit); + +void lm95245_set_local_shared_os__critical_limit(struct device *dev, int val) +{ + thermal_set_limit(dev, val, INDEX_LOCAL_OS_TCRIT_LIMIT); +} +EXPORT_SYMBOL(lm95245_set_local_shared_os__critical_limit); + +static ssize_t set_limit(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int index = to_sensor_dev_attr(attr)->index; + unsigned long val; + + if (strict_strtoul(buf, 10, &val) < 0) + return -EINVAL; + + thermal_set_limit(dev, (int)val, index); return count; } @@ -345,7 +410,7 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, int index = to_sensor_dev_attr(attr)->index; return snprintf(buf, PAGE_SIZE - 1, "%d\n", - !!(data->regs[9] & index)); + !!(data->regs[INDEX_STATUS1] & index)); } static ssize_t show_interval(struct device *dev, struct device_attribute *attr, @@ -375,19 +440,23 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr, return count; } -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0); +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, INDEX_LOCAL_TEMP); static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_limit, - set_limit, 6); + set_limit, INDEX_LOCAL_OS_TCRIT_LIMIT); static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_limit, - set_crit_hyst, 8); + set_crit_hyst, INDEX_COMMON_HYSTERESIS); static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, STATUS1_LOC); -static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2); +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, INDEX_REMOTE_TEMP); +static SENSOR_DEVICE_ATTR(temp2_os, S_IWUSR | S_IRUGO, show_limit, + set_limit, INDEX_REMOTE_OS_LIMIT); static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_limit, - set_limit, 7); + set_limit, INDEX_REMOTE_TCRIT_LIMIT); static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_limit, - set_crit_hyst, 8); + set_crit_hyst, INDEX_COMMON_HYSTERESIS); +static SENSOR_DEVICE_ATTR(temp2_os_alarm, S_IRUGO, show_alarm, NULL, + STATUS1_ROS); static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, STATUS1_RTCRIT); static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, @@ -404,8 +473,10 @@ static struct attribute *lm95245_attributes[] = { &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_os.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_os_alarm.dev_attr.attr, &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp2_type.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, @@ -454,6 +525,13 @@ static void lm95245_init_client(struct i2c_client *client) i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONFIG1, data->config1); } + + /* Configure over-temperature shutdown (OS) output pin */ + if (client->dev.platform_data && ((struct lm95245_platform_data*)(client->dev.platform_data))->enable_os_pin) { + data->config2 |= CFG2_OS_A0; + i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONFIG2, + data->config2); + } } static int lm95245_probe(struct i2c_client *new_client, @@ -485,6 +563,10 @@ static int lm95245_probe(struct i2c_client *new_client, goto exit_remove_files; } + /* Notify callback that probe is done */ + if (new_client->dev.platform_data && ((struct lm95245_platform_data*)(new_client->dev.platform_data))->probe_callback) + ((struct lm95245_platform_data*)(new_client->dev.platform_data))->probe_callback(&new_client->dev); + return 0; exit_remove_files: |