From fcdc5739dce03d8050ebfa7153412c2efcdee94f Mon Sep 17 00:00:00 2001 From: Constantine Shulyupin Date: Wed, 1 Jul 2015 09:52:23 +0300 Subject: [PATCH] hwmon: (nct7802) add temperature sensor type attribute Sensor type: 3 diode (current mode), MD=1 4 thermistor, MD=2 Reference: Nuvoton Hardware Monitoring IC NCT7802Y 7.2.32 Mode Selection Register Location : Index 22h Signed-off-by: Constantine Shulyupin Signed-off-by: Guenter Roeck --- drivers/hwmon/nct7802.c | 72 ++++++++++++++++++++++++++++++++++------- 1 file changed, 60 insertions(+), 12 deletions(-) diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c index fbfc02bb2cfa..344cbec79802 100644 --- a/drivers/hwmon/nct7802.c +++ b/drivers/hwmon/nct7802.c @@ -49,7 +49,7 @@ static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { #define REG_VOLTAGE_LOW 0x0f #define REG_FANCOUNT_LOW 0x13 #define REG_START 0x21 -#define REG_MODE 0x22 +#define REG_MODE 0x22 /* 7.2.32 Mode Selection Register */ #define REG_PECI_ENABLE 0x23 #define REG_FAN_ENABLE 0x24 #define REG_VMON_ENABLE 0x25 @@ -66,6 +66,43 @@ struct nct7802_data { struct mutex access_lock; /* for multi-byte read and write operations */ }; +static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + unsigned int mode; + int ret; + + ret = regmap_read(data->regmap, REG_MODE, &mode); + if (ret < 0) + return ret; + + return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2); +} + +static ssize_t store_temp_type(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + unsigned int type; + int err; + + err = kstrtouint(buf, 0, &type); + if (err < 0) + return err; + if (sattr->index == 2 && type != 4) /* RD3 */ + return -EINVAL; + if (type < 3 || type > 4) + return -EINVAL; + err = regmap_update_bits(data->regmap, REG_MODE, + 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index); + return err ? : count; +} + + static int nct7802_read_temp(struct nct7802_data *data, u8 reg_temp, u8 reg_temp_low, int *temp) { @@ -377,6 +414,8 @@ store_beep(struct device *dev, struct device_attribute *attr, const char *buf, return err ? : count; } +static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, + show_temp_type, store_temp_type, 0); static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01, REG_TEMP_LSB); static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, @@ -386,6 +425,8 @@ static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, store_temp, 0x3a, 0); +static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, + show_temp_type, store_temp_type, 1); static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02, REG_TEMP_LSB); static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, @@ -395,6 +436,8 @@ static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, store_temp, 0x3b, 0); +static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, + show_temp_type, store_temp_type, 2); static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03, REG_TEMP_LSB); static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, @@ -475,6 +518,7 @@ static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 0x5c, 5); static struct attribute *nct7802_temp_attrs[] = { + &sensor_dev_attr_temp1_type.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, @@ -485,7 +529,8 @@ static struct attribute *nct7802_temp_attrs[] = { &sensor_dev_attr_temp1_fault.dev_attr.attr, &sensor_dev_attr_temp1_beep.dev_attr.attr, - &sensor_dev_attr_temp2_input.dev_attr.attr, /* 9 */ + &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */ + &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, @@ -495,7 +540,8 @@ static struct attribute *nct7802_temp_attrs[] = { &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_temp2_beep.dev_attr.attr, - &sensor_dev_attr_temp3_input.dev_attr.attr, /* 18 */ + &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */ + &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp3_min.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp3_crit.dev_attr.attr, @@ -505,7 +551,7 @@ static struct attribute *nct7802_temp_attrs[] = { &sensor_dev_attr_temp3_fault.dev_attr.attr, &sensor_dev_attr_temp3_beep.dev_attr.attr, - &sensor_dev_attr_temp4_input.dev_attr.attr, /* 27 */ + &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */ &sensor_dev_attr_temp4_min.dev_attr.attr, &sensor_dev_attr_temp4_max.dev_attr.attr, &sensor_dev_attr_temp4_crit.dev_attr.attr, @@ -514,7 +560,7 @@ static struct attribute *nct7802_temp_attrs[] = { &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp4_beep.dev_attr.attr, - &sensor_dev_attr_temp5_input.dev_attr.attr, /* 35 */ + &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */ &sensor_dev_attr_temp5_min.dev_attr.attr, &sensor_dev_attr_temp5_max.dev_attr.attr, &sensor_dev_attr_temp5_crit.dev_attr.attr, @@ -523,7 +569,7 @@ static struct attribute *nct7802_temp_attrs[] = { &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp5_beep.dev_attr.attr, - &sensor_dev_attr_temp6_input.dev_attr.attr, /* 43 */ + &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */ &sensor_dev_attr_temp6_beep.dev_attr.attr, NULL @@ -541,25 +587,27 @@ static umode_t nct7802_temp_is_visible(struct kobject *kobj, if (err < 0) return 0; - if (index < 9 && + if (index < 10 && (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */ return 0; - if (index >= 9 && index < 18 && + + if (index >= 10 && index < 20 && (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */ return 0; - if (index >= 18 && index < 27 && (reg & 0x30) != 0x20) /* RD3 */ + if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */ return 0; - if (index >= 27 && index < 35) /* local */ + + if (index >= 30 && index < 38) /* local */ return attr->mode; err = regmap_read(data->regmap, REG_PECI_ENABLE, ®); if (err < 0) return 0; - if (index >= 35 && index < 43 && !(reg & 0x01)) /* PECI 0 */ + if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */ return 0; - if (index >= 0x43 && (!(reg & 0x02))) /* PECI 1 */ + if (index >= 0x46 && (!(reg & 0x02))) /* PECI 1 */ return 0; return attr->mode; -- 2.34.1