diff options
| -rw-r--r-- | drivers/hwmon/lm85.c | 360 |
1 files changed, 230 insertions, 130 deletions
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c index fd269831788f..864c7d999e0c 100644 --- a/drivers/hwmon/lm85.c +++ b/drivers/hwmon/lm85.c @@ -1,28 +1,28 @@ /* - lm85.c - Part of lm_sensors, Linux kernel modules for hardware - monitoring - Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> - Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com> - Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de> - Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com> - Copyright (C) 2007--2009 Jean Delvare <khali@linux-fr.org> - - Chip details at <http://www.national.com/ds/LM/LM85.pdf> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ + * lm85.c - Part of lm_sensors, Linux kernel modules for hardware + * monitoring + * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> + * Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com> + * Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de> + * Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com> + * Copyright (C) 2007--2009 Jean Delvare <khali@linux-fr.org> + * + * Chip details at <http://www.national.com/ds/LM/LM85.pdf> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ #include <linux/module.h> #include <linux/init.h> @@ -46,88 +46,89 @@ enum chips { /* The LM85 registers */ -#define LM85_REG_IN(nr) (0x20 + (nr)) -#define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2) -#define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2) +#define LM85_REG_IN(nr) (0x20 + (nr)) +#define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2) +#define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2) -#define LM85_REG_TEMP(nr) (0x25 + (nr)) -#define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2) -#define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2) +#define LM85_REG_TEMP(nr) (0x25 + (nr)) +#define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2) +#define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2) /* Fan speeds are LSB, MSB (2 bytes) */ -#define LM85_REG_FAN(nr) (0x28 + (nr) * 2) -#define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2) +#define LM85_REG_FAN(nr) (0x28 + (nr) * 2) +#define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2) -#define LM85_REG_PWM(nr) (0x30 + (nr)) +#define LM85_REG_PWM(nr) (0x30 + (nr)) -#define LM85_REG_COMPANY 0x3e -#define LM85_REG_VERSTEP 0x3f +#define LM85_REG_COMPANY 0x3e +#define LM85_REG_VERSTEP 0x3f -#define ADT7468_REG_CFG5 0x7c -#define ADT7468_OFF64 (1 << 0) -#define ADT7468_HFPWM (1 << 1) -#define IS_ADT7468_OFF64(data) \ +#define ADT7468_REG_CFG5 0x7c +#define ADT7468_OFF64 (1 << 0) +#define ADT7468_HFPWM (1 << 1) +#define IS_ADT7468_OFF64(data) \ ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64)) -#define IS_ADT7468_HFPWM(data) \ +#define IS_ADT7468_HFPWM(data) \ ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_HFPWM)) /* These are the recognized values for the above regs */ -#define LM85_COMPANY_NATIONAL 0x01 -#define LM85_COMPANY_ANALOG_DEV 0x41 -#define LM85_COMPANY_SMSC 0x5c -#define LM85_VERSTEP_VMASK 0xf0 -#define LM85_VERSTEP_GENERIC 0x60 -#define LM85_VERSTEP_GENERIC2 0x70 -#define LM85_VERSTEP_LM85C 0x60 -#define LM85_VERSTEP_LM85B 0x62 -#define LM85_VERSTEP_LM96000_1 0x68 -#define LM85_VERSTEP_LM96000_2 0x69 -#define LM85_VERSTEP_ADM1027 0x60 -#define LM85_VERSTEP_ADT7463 0x62 -#define LM85_VERSTEP_ADT7463C 0x6A -#define LM85_VERSTEP_ADT7468_1 0x71 -#define LM85_VERSTEP_ADT7468_2 0x72 -#define LM85_VERSTEP_EMC6D100_A0 0x60 -#define LM85_VERSTEP_EMC6D100_A1 0x61 -#define LM85_VERSTEP_EMC6D102 0x65 -#define LM85_VERSTEP_EMC6D103_A0 0x68 -#define LM85_VERSTEP_EMC6D103_A1 0x69 -#define LM85_VERSTEP_EMC6D103S 0x6A /* Also known as EMC6D103:A2 */ - -#define LM85_REG_CONFIG 0x40 - -#define LM85_REG_ALARM1 0x41 -#define LM85_REG_ALARM2 0x42 - -#define LM85_REG_VID 0x43 +#define LM85_COMPANY_NATIONAL 0x01 +#define LM85_COMPANY_ANALOG_DEV 0x41 +#define LM85_COMPANY_SMSC 0x5c +#define LM85_VERSTEP_VMASK 0xf0 +#define LM85_VERSTEP_GENERIC 0x60 +#define LM85_VERSTEP_GENERIC2 0x70 +#define LM85_VERSTEP_LM85C 0x60 +#define LM85_VERSTEP_LM85B 0x62 +#define LM85_VERSTEP_LM96000_1 0x68 +#define LM85_VERSTEP_LM96000_2 0x69 +#define LM85_VERSTEP_ADM1027 0x60 +#define LM85_VERSTEP_ADT7463 0x62 +#define LM85_VERSTEP_ADT7463C 0x6A +#define LM85_VERSTEP_ADT7468_1 0x71 +#define LM85_VERSTEP_ADT7468_2 0x72 +#define LM85_VERSTEP_EMC6D100_A0 0x60 +#define LM85_VERSTEP_EMC6D100_A1 0x61 +#define LM85_VERSTEP_EMC6D102 0x65 +#define LM85_VERSTEP_EMC6D103_A0 0x68 +#define LM85_VERSTEP_EMC6D103_A1 0x69 +#define LM85_VERSTEP_EMC6D103S 0x6A /* Also known as EMC6D103:A2 */ + +#define LM85_REG_CONFIG 0x40 + +#define LM85_REG_ALARM1 0x41 +#define LM85_REG_ALARM2 0x42 + +#define LM85_REG_VID 0x43 /* Automated FAN control */ -#define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr)) -#define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr)) -#define LM85_REG_AFAN_SPIKE1 0x62 -#define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr)) -#define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr)) -#define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr)) -#define LM85_REG_AFAN_HYST1 0x6d -#define LM85_REG_AFAN_HYST2 0x6e - -#define ADM1027_REG_EXTEND_ADC1 0x76 -#define ADM1027_REG_EXTEND_ADC2 0x77 +#define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr)) +#define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr)) +#define LM85_REG_AFAN_SPIKE1 0x62 +#define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr)) +#define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr)) +#define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr)) +#define LM85_REG_AFAN_HYST1 0x6d +#define LM85_REG_AFAN_HYST2 0x6e + +#define ADM1027_REG_EXTEND_ADC1 0x76 +#define ADM1027_REG_EXTEND_ADC2 0x77 #define EMC6D100_REG_ALARM3 0x7d /* IN5, IN6 and IN7 */ -#define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5)) -#define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2) -#define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2) -#define EMC6D102_REG_EXTEND_ADC1 0x85 -#define EMC6D102_REG_EXTEND_ADC2 0x86 -#define EMC6D102_REG_EXTEND_ADC3 0x87 -#define EMC6D102_REG_EXTEND_ADC4 0x88 - - -/* Conversions. Rounding and limit checking is only done on the TO_REG - variants. Note that you should be a bit careful with which arguments - these macros are called: arguments may be evaluated more than once. +#define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5)) +#define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2) +#define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2) +#define EMC6D102_REG_EXTEND_ADC1 0x85 +#define EMC6D102_REG_EXTEND_ADC2 0x86 +#define EMC6D102_REG_EXTEND_ADC3 0x87 +#define EMC6D102_REG_EXTEND_ADC4 0x88 + + +/* + * Conversions. Rounding and limit checking is only done on the TO_REG + * variants. Note that you should be a bit careful with which arguments + * these macros are called: arguments may be evaluated more than once. */ /* IN are scaled according to built-in resistors */ @@ -166,7 +167,8 @@ static inline u16 FAN_TO_REG(unsigned long val) #define PWM_FROM_REG(val) (val) -/* ZONEs have the following parameters: +/* + * ZONEs have the following parameters: * Limit (low) temp, 1. degC * Hysteresis (below limit), 1. degC (0-15) * Range of speed control, .1 degC (2-80) @@ -228,7 +230,8 @@ static int FREQ_FROM_REG(const int *map, u8 reg) return map[reg & 0x07]; } -/* Since we can't use strings, I'm abusing these numbers +/* + * Since we can't use strings, I'm abusing these numbers * to stand in for the following meanings: * 1 -- PWM responds to Zone 1 * 2 -- PWM responds to Zone 2 @@ -258,7 +261,8 @@ static int ZONE_TO_REG(int zone) #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15) #define HYST_FROM_REG(val) ((val) * 1000) -/* Chip sampling rates +/* + * Chip sampling rates * * Some sensors are not updated more frequently than once per second * so it doesn't make sense to read them more often than that. @@ -274,7 +278,8 @@ static int ZONE_TO_REG(int zone) #define LM85_DATA_INTERVAL (HZ + HZ / 2) #define LM85_CONFIG_INTERVAL (1 * 60 * HZ) -/* LM85 can automatically adjust fan speeds based on temperature +/* + * LM85 can automatically adjust fan speeds based on temperature * This structure encapsulates an entire Zone config. There are * three zones (one for each temperature input) on the lm85 */ @@ -283,7 +288,8 @@ struct lm85_zone { u8 hyst; /* Low limit hysteresis. (0-15) */ u8 range; /* Temp range, encoded */ s8 critical; /* "All fans ON" temp limit */ - u8 max_desired; /* Actual "max" temperature specified. Preserved + u8 max_desired; /* + * Actual "max" temperature specified. Preserved * to prevent "drift" as other autofan control * values change. */ @@ -295,8 +301,10 @@ struct lm85_autofan { u8 min_off; /* Min PWM or OFF below "limit", flag */ }; -/* For each registered chip, we need to keep some data in memory. - The structure is dynamically allocated. */ +/* + * For each registered chip, we need to keep some data in memory. + * The structure is dynamically allocated. + */ struct lm85_data { struct device *hwmon_dev; const int *freq_map; @@ -391,7 +399,12 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->fan_min[nr] = FAN_TO_REG(val); @@ -443,7 +456,14 @@ static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm85_data *data = dev_get_drvdata(dev); - data->vrm = simple_strtoul(buf, NULL, 10); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + data->vrm = val; return count; } @@ -500,7 +520,12 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->pwm[nr] = PWM_TO_REG(val); @@ -537,8 +562,13 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); u8 config; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; switch (val) { case 0: @@ -548,8 +578,10 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute config = 7; break; case 2: - /* Here we have to choose arbitrarily one of the 5 possible - configurations; I go for the safest */ + /* + * Here we have to choose arbitrarily one of the 5 possible + * configurations; I go for the safest + */ config = 6; break; default: @@ -588,12 +620,19 @@ static ssize_t set_pwm_freq(struct device *dev, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); - /* The ADT7468 has a special high-frequency PWM output mode, + /* + * The ADT7468 has a special high-frequency PWM output mode, * where all PWM outputs are driven by a 22.5 kHz clock. - * This might confuse the user, but there's not much we can do. */ + * This might confuse the user, but there's not much we can do. + */ if (data->type == adt7468 && val >= 11300) { /* High freq. mode */ data->cfg5 &= ~ADT7468_HFPWM; lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5); @@ -648,7 +687,12 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->in_min[nr] = INS_TO_REG(nr, val); @@ -671,7 +715,12 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->in_max[nr] = INS_TO_REG(nr, val); @@ -722,7 +771,12 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; if (IS_ADT7468_OFF64(data)) val += 64; @@ -748,7 +802,12 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; if (IS_ADT7468_OFF64(data)) val += 64; @@ -789,7 +848,12 @@ static ssize_t set_pwm_auto_channels(struct device *dev, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->autofan[nr].config = (data->autofan[nr].config & (~0xe0)) @@ -814,7 +878,12 @@ static ssize_t set_pwm_auto_pwm_min(struct device *dev, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->autofan[nr].min_pwm = PWM_TO_REG(val); @@ -838,8 +907,13 @@ static ssize_t set_pwm_auto_pwm_minctl(struct device *dev, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); u8 tmp; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->autofan[nr].min_off = val; @@ -885,7 +959,12 @@ static ssize_t set_temp_auto_temp_off(struct device *dev, struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); int min; - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); min = TEMP_FROM_REG(data->zone[nr].limit); @@ -916,7 +995,12 @@ static ssize_t set_temp_auto_temp_min(struct device *dev, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->zone[nr].limit = TEMP_TO_REG(val); @@ -951,7 +1035,12 @@ static ssize_t set_temp_auto_temp_max(struct device *dev, struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); int min; - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); min = TEMP_FROM_REG(data->zone[nr].limit); @@ -979,7 +1068,12 @@ static ssize_t set_temp_auto_temp_crit(struct device *dev, int nr = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct lm85_data *data = i2c_get_clientdata(client); - long val = simple_strtol(buf, NULL, 10); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; mutex_lock(&data->update_lock); data->zone[nr].critical = TEMP_TO_REG(val); @@ -1338,24 +1432,28 @@ static int lm85_probe(struct i2c_client *client, goto err_remove_files; } - /* The ADT7463/68 have an optional VRM 10 mode where pin 21 is used - as a sixth digital VID input rather than an analog input. */ + /* + * The ADT7463/68 have an optional VRM 10 mode where pin 21 is used + * as a sixth digital VID input rather than an analog input. + */ if (data->type == adt7463 || data->type == adt7468) { u8 vid = lm85_read_value(client, LM85_REG_VID); if (vid & 0x80) data->has_vid5 = true; } - if (!data->has_vid5) - if ((err = sysfs_create_group(&client->dev.kobj, - &lm85_group_in4))) + if (!data->has_vid5) { + err = sysfs_create_group(&client->dev.kobj, &lm85_group_in4); + if (err) goto err_remove_files; + } /* The EMC6D100 has 3 additional voltage inputs */ - if (data->type == emc6d100) - if ((err = sysfs_create_group(&client->dev.kobj, - &lm85_group_in567))) + if (data->type == emc6d100) { + err = sysfs_create_group(&client->dev.kobj, &lm85_group_in567); + if (err) goto err_remove_files; + } data->hwmon_dev = hwmon_device_register(&client->dev); if (IS_ERR(data->hwmon_dev)) { @@ -1443,7 +1541,8 @@ static struct lm85_data *lm85_update_device(struct device *dev) /* Things that change quickly */ dev_dbg(&client->dev, "Reading sensor values\n"); - /* Have to read extended bits first to "freeze" the + /* + * Have to read extended bits first to "freeze" the * more significant bits that are read later. * There are 2 additional resolution bits per channel and we * have room for 4, so we shift them to the left. @@ -1503,9 +1602,10 @@ static struct lm85_data *lm85_update_device(struct device *dev) EMC6D100_REG_ALARM3) << 16; } else if (data->type == emc6d102 || data->type == emc6d103 || data->type == emc6d103s) { - /* Have to read LSB bits after the MSB ones because - the reading of the MSB bits has frozen the - LSBs (backward from the ADM1027). + /* + * Have to read LSB bits after the MSB ones because + * the reading of the MSB bits has frozen the + * LSBs (backward from the ADM1027). */ int ext1 = lm85_read_value(client, EMC6D102_REG_EXTEND_ADC1); 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