diff options
Diffstat (limited to 'drivers/hwmon/lm95241.c')
| -rw-r--r-- | drivers/hwmon/lm95241.c | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c index cdf19adaec79..a8cf666fe661 100644 --- a/drivers/hwmon/lm95241.c +++ b/drivers/hwmon/lm95241.c @@ -59,6 +59,7 @@ static const unsigned short normal_i2c[] = { #define CFG_CR0182 0x10 #define CFG_CR1000 0x20 #define CFG_CR2700 0x30 +#define CFG_CRMASK 0x30 #define R1MS_SHIFT 0 #define R2MS_SHIFT 2 #define R1MS_MASK (0x01 << (R1MS_SHIFT)) @@ -91,7 +92,8 @@ static const u8 lm95241_reg_address[] = { struct lm95241_data { struct i2c_client *client; struct mutex update_lock; - unsigned long last_updated, interval; /* in jiffies */ + unsigned long last_updated; /* in jiffies */ + unsigned long interval; /* in milli-seconds */ char valid; /* zero until following fields are valid */ /* registers values */ u8 temp[ARRAY_SIZE(lm95241_reg_address)]; @@ -118,7 +120,8 @@ static struct lm95241_data *lm95241_update_device(struct device *dev) mutex_lock(&data->update_lock); - if (time_after(jiffies, data->last_updated + data->interval) || + if (time_after(jiffies, data->last_updated + + msecs_to_jiffies(data->interval)) || !data->valid) { int i; @@ -276,8 +279,7 @@ static ssize_t show_interval(struct device *dev, struct device_attribute *attr, { struct lm95241_data *data = lm95241_update_device(dev); - return snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->interval - / HZ); + return snprintf(buf, PAGE_SIZE - 1, "%lu\n", data->interval); } static ssize_t set_interval(struct device *dev, struct device_attribute *attr, @@ -285,11 +287,35 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr, { struct lm95241_data *data = dev_get_drvdata(dev); unsigned long val; + int convrate; + u8 config; if (kstrtoul(buf, 10, &val) < 0) return -EINVAL; - data->interval = val * HZ / 1000; + mutex_lock(&data->update_lock); + + config = data->config & ~CFG_CRMASK; + + if (val < 130) { + convrate = 76; + config |= CFG_CR0076; + } else if (val < 590) { + convrate = 182; + config |= CFG_CR0182; + } else if (val < 1850) { + convrate = 1000; + config |= CFG_CR1000; + } else { + convrate = 2700; + config |= CFG_CR2700; + } + + data->interval = convrate; + data->config = config; + i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG, + config); + mutex_unlock(&data->update_lock); return count; } @@ -362,8 +388,8 @@ static int lm95241_detect(struct i2c_client *new_client, static void lm95241_init_client(struct i2c_client *client, struct lm95241_data *data) { - data->interval = HZ; /* 1 sec default */ - data->config = CFG_CR0076; + data->interval = 1000; + data->config = CFG_CR1000; data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT); i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config); |