From 5c25d954d37b7c18606d7ef99122424552b86ef2 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 11 Dec 2012 07:29:06 -0800 Subject: hwmon: (nct6775) Add support for fanX_pulses sysfs attribute Signed-off-by: Guenter Roeck --- drivers/hwmon/nct6775.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) (limited to 'drivers/hwmon/nct6775.c') diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index bafcae55e255..fea6ed7a0044 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -205,6 +205,7 @@ static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 }; static const u16 NCT6775_REG_FAN[] = { 0x630, 0x632, 0x634, 0x636, 0x638 }; static const u16 NCT6775_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d }; +static const u16 NCT6775_REG_FAN_PULSES[] = { 0x641, 0x642, 0x643, 0x644, 0 }; static const u16 NCT6775_REG_TEMP[] = { 0x27, 0x150, 0x250, 0x62b, 0x62c, 0x62d }; @@ -264,6 +265,7 @@ static const s8 NCT6776_ALARM_BITS[] = { 12, 9 }; /* intrusion0, intrusion1 */ static const u16 NCT6776_REG_FAN_MIN[] = { 0x63a, 0x63c, 0x63e, 0x640, 0x642 }; +static const u16 NCT6776_REG_FAN_PULSES[] = { 0x644, 0x645, 0x646, 0, 0 }; static const u16 NCT6776_REG_TEMP_CONFIG[ARRAY_SIZE(NCT6775_REG_TEMP)] = { 0x18, 0x152, 0x252, 0x628, 0x629, 0x62A }; @@ -319,6 +321,8 @@ static const s8 NCT6779_ALARM_BITS[] = { 12, 9 }; /* intrusion0, intrusion1 */ static const u16 NCT6779_REG_FAN[] = { 0x4b0, 0x4b2, 0x4b4, 0x4b6, 0x4b8 }; +static const u16 NCT6779_REG_FAN_PULSES[] = { + 0x644, 0x645, 0x646, 0x647, 0x648 }; static const u16 NCT6779_REG_TEMP[] = { 0x27, 0x150 }; static const u16 NCT6779_REG_TEMP_CONFIG[ARRAY_SIZE(NCT6779_REG_TEMP)] = { @@ -462,6 +466,7 @@ struct nct6775_data { const u16 *REG_FAN; const u16 *REG_FAN_MIN; + const u16 *REG_FAN_PULSES; const u16 *REG_TEMP_SOURCE; /* temp register sources */ const u16 *REG_TEMP_OFFSET; @@ -481,6 +486,7 @@ struct nct6775_data { u8 in[15][3]; /* [0]=in, [1]=in_max, [2]=in_min */ unsigned int rpm[5]; u16 fan_min[5]; + u8 fan_pulses[5]; u8 fan_div[5]; u8 has_fan; /* some fan inputs can be disabled */ u8 has_fan_min; /* some fans don't have min register */ @@ -802,6 +808,8 @@ static struct nct6775_data *nct6775_update_device(struct device *dev) if (data->has_fan_min & (1 << i)) data->fan_min[i] = nct6775_read_value(data, data->REG_FAN_MIN[i]); + data->fan_pulses[i] = + nct6775_read_value(data, data->REG_FAN_PULSES[i]); nct6775_select_fan_div(dev, data, i, reg); } @@ -1225,6 +1233,41 @@ write_min: return count; } +static ssize_t +show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct nct6775_data *data = nct6775_update_device(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + int p = data->fan_pulses[sattr->index]; + + return sprintf(buf, "%d\n", p ? : 4); +} + +static ssize_t +store_fan_pulses(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct nct6775_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + int nr = sattr->index; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err < 0) + return err; + + if (val > 4) + return -EINVAL; + + mutex_lock(&data->update_lock); + data->fan_pulses[nr] = val & 3; + nct6775_write_value(data, data->REG_FAN_PULSES[nr], val & 3); + mutex_unlock(&data->update_lock); + + return count; +} + static struct sensor_device_attribute sda_fan_input[] = { SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), @@ -1254,6 +1297,19 @@ static struct sensor_device_attribute sda_fan_min[] = { store_fan_min, 4), }; +static struct sensor_device_attribute sda_fan_pulses[] = { + SENSOR_ATTR(fan1_pulses, S_IWUSR | S_IRUGO, show_fan_pulses, + store_fan_pulses, 0), + SENSOR_ATTR(fan2_pulses, S_IWUSR | S_IRUGO, show_fan_pulses, + store_fan_pulses, 1), + SENSOR_ATTR(fan3_pulses, S_IWUSR | S_IRUGO, show_fan_pulses, + store_fan_pulses, 2), + SENSOR_ATTR(fan4_pulses, S_IWUSR | S_IRUGO, show_fan_pulses, + store_fan_pulses, 3), + SENSOR_ATTR(fan5_pulses, S_IWUSR | S_IRUGO, show_fan_pulses, + store_fan_pulses, 4), +}; + static struct sensor_device_attribute sda_fan_div[] = { SENSOR_ATTR(fan1_div, S_IRUGO, show_fan_div, NULL, 0), SENSOR_ATTR(fan2_div, S_IRUGO, show_fan_div, NULL, 1), @@ -1621,6 +1677,7 @@ static void nct6775_device_remove_files(struct device *dev) device_remove_file(dev, &sda_fan_alarm[i].dev_attr); device_remove_file(dev, &sda_fan_div[i].dev_attr); device_remove_file(dev, &sda_fan_min[i].dev_attr); + device_remove_file(dev, &sda_fan_pulses[i].dev_attr); } for (i = 0; i < NUM_TEMP; i++) { if (!(data->have_temp & (1 << i))) @@ -1809,6 +1866,7 @@ static int nct6775_probe(struct platform_device *pdev) data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX; data->REG_FAN = NCT6775_REG_FAN; data->REG_FAN_MIN = NCT6775_REG_FAN_MIN; + data->REG_FAN_PULSES = NCT6775_REG_FAN_PULSES; data->REG_TEMP_OFFSET = NCT6775_REG_TEMP_OFFSET; data->REG_TEMP_SOURCE = NCT6775_REG_TEMP_SOURCE; data->REG_ALARM = NCT6775_REG_ALARM; @@ -1843,6 +1901,7 @@ static int nct6775_probe(struct platform_device *pdev) data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX; data->REG_FAN = NCT6775_REG_FAN; data->REG_FAN_MIN = NCT6776_REG_FAN_MIN; + data->REG_FAN_PULSES = NCT6776_REG_FAN_PULSES; data->REG_TEMP_OFFSET = NCT6775_REG_TEMP_OFFSET; data->REG_TEMP_SOURCE = NCT6775_REG_TEMP_SOURCE; data->REG_ALARM = NCT6775_REG_ALARM; @@ -1877,6 +1936,7 @@ static int nct6775_probe(struct platform_device *pdev) data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX; data->REG_FAN = NCT6779_REG_FAN; data->REG_FAN_MIN = NCT6776_REG_FAN_MIN; + data->REG_FAN_PULSES = NCT6779_REG_FAN_PULSES; data->REG_TEMP_OFFSET = NCT6779_REG_TEMP_OFFSET; data->REG_TEMP_SOURCE = NCT6775_REG_TEMP_SOURCE; data->REG_ALARM = NCT6779_REG_ALARM; @@ -2094,6 +2154,10 @@ static int nct6775_probe(struct platform_device *pdev) if (err) goto exit_remove; } + err = device_create_file(dev, + &sda_fan_pulses[i].dev_attr); + if (err) + goto exit_remove; } } -- cgit v1.2.3-59-g8ed1b