diff options
Diffstat (limited to 'drivers/hwmon/pmbus_core.c')
| -rw-r--r-- | drivers/hwmon/pmbus_core.c | 1660 |
1 files changed, 0 insertions, 1660 deletions
diff --git a/drivers/hwmon/pmbus_core.c b/drivers/hwmon/pmbus_core.c deleted file mode 100644 index edfb92e4173..00000000000 --- a/drivers/hwmon/pmbus_core.c +++ /dev/null @@ -1,1660 +0,0 @@ -/* - * Hardware monitoring driver for PMBus devices - * - * Copyright (c) 2010, 2011 Ericsson AB. - * - * 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/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/hwmon.h> -#include <linux/hwmon-sysfs.h> -#include <linux/delay.h> -#include <linux/i2c/pmbus.h> -#include "pmbus.h" - -/* - * Constants needed to determine number of sensors, booleans, and labels. - */ -#define PMBUS_MAX_INPUT_SENSORS 11 /* 6*volt, 3*curr, 2*power */ -#define PMBUS_VOUT_SENSORS_PER_PAGE 5 /* input, min, max, lcrit, - crit */ -#define PMBUS_IOUT_SENSORS_PER_PAGE 4 /* input, min, max, crit */ -#define PMBUS_POUT_SENSORS_PER_PAGE 4 /* input, cap, max, crit */ -#define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */ -#define PMBUS_MAX_SENSORS_PER_TEMP 5 /* input, min, max, lcrit, - crit */ - -#define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm, - lcrit_alarm, crit_alarm; - c: alarm, crit_alarm; - p: crit_alarm */ -#define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm, - lcrit_alarm, crit_alarm */ -#define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm, - crit_alarm */ -#define PMBUS_POUT_BOOLEANS_PER_PAGE 2 /* alarm, crit_alarm */ -#define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */ -#define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm, - lcrit_alarm, crit_alarm */ - -#define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */ - -/* - * status, status_vout, status_iout, status_fans, status_fan34, and status_temp - * are paged. status_input is unpaged. - */ -#define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1) - -/* - * Index into status register array, per status register group - */ -#define PB_STATUS_BASE 0 -#define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) -#define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) -#define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) -#define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) -#define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) -#define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1) - -struct pmbus_sensor { - char name[I2C_NAME_SIZE]; /* sysfs sensor name */ - struct sensor_device_attribute attribute; - u8 page; /* page number */ - u8 reg; /* register */ - enum pmbus_sensor_classes class; /* sensor class */ - bool update; /* runtime sensor update needed */ - int data; /* Sensor data. - Negative if there was a read error */ -}; - -struct pmbus_boolean { - char name[I2C_NAME_SIZE]; /* sysfs boolean name */ - struct sensor_device_attribute attribute; -}; - -struct pmbus_label { - char name[I2C_NAME_SIZE]; /* sysfs label name */ - struct sensor_device_attribute attribute; - char label[I2C_NAME_SIZE]; /* label */ -}; - -struct pmbus_data { - struct device *hwmon_dev; - - u32 flags; /* from platform data */ - - int exponent; /* linear mode: exponent for output voltages */ - - const struct pmbus_driver_info *info; - - int max_attributes; - int num_attributes; - struct attribute **attributes; - struct attribute_group group; - - /* - * Sensors cover both sensor and limit registers. - */ - int max_sensors; - int num_sensors; - struct pmbus_sensor *sensors; - /* - * Booleans are used for alarms. - * Values are determined from status registers. - */ - int max_booleans; - int num_booleans; - struct pmbus_boolean *booleans; - /* - * Labels are used to map generic names (e.g., "in1") - * to PMBus specific names (e.g., "vin" or "vout1"). - */ - int max_labels; - int num_labels; - struct pmbus_label *labels; - - struct mutex update_lock; - bool valid; - unsigned long last_updated; /* in jiffies */ - - /* - * A single status register covers multiple attributes, - * so we keep them all together. - */ - u8 status_bits; - u8 status[PB_NUM_STATUS_REG]; - - u8 currpage; -}; - -int pmbus_set_page(struct i2c_client *client, u8 page) -{ - struct pmbus_data *data = i2c_get_clientdata(client); - int rv = 0; - int newpage; - - if (page != data->currpage) { - rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); - newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); - if (newpage != page) - rv = -EINVAL; - else - data->currpage = page; - } - return rv; -} -EXPORT_SYMBOL_GPL(pmbus_set_page); - -static int pmbus_write_byte(struct i2c_client *client, u8 page, u8 value) -{ - int rv; - - rv = pmbus_set_page(client, page); - if (rv < 0) - return rv; - - return i2c_smbus_write_byte(client, value); -} - -static int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, - u16 word) -{ - int rv; - - rv = pmbus_set_page(client, page); - if (rv < 0) - return rv; - - return i2c_smbus_write_word_data(client, reg, word); -} - -int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) -{ - int rv; - - rv = pmbus_set_page(client, page); - if (rv < 0) - return rv; - - return i2c_smbus_read_word_data(client, reg); -} -EXPORT_SYMBOL_GPL(pmbus_read_word_data); - -static int pmbus_read_byte_data(struct i2c_client *client, u8 page, u8 reg) -{ - int rv; - - rv = pmbus_set_page(client, page); - if (rv < 0) - return rv; - - return i2c_smbus_read_byte_data(client, reg); -} - -static void pmbus_clear_fault_page(struct i2c_client *client, int page) -{ - pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); -} - -void pmbus_clear_faults(struct i2c_client *client) -{ - struct pmbus_data *data = i2c_get_clientdata(client); - int i; - - for (i = 0; i < data->info->pages; i++) - pmbus_clear_fault_page(client, i); -} -EXPORT_SYMBOL_GPL(pmbus_clear_faults); - -static int pmbus_check_status_cml(struct i2c_client *client, int page) -{ - int status, status2; - - status = pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE); - if (status < 0 || (status & PB_STATUS_CML)) { - status2 = pmbus_read_byte_data(client, page, PMBUS_STATUS_CML); - if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) - return -EINVAL; - } - return 0; -} - -bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) -{ - int rv; - struct pmbus_data *data = i2c_get_clientdata(client); - - rv = pmbus_read_byte_data(client, page, reg); - if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) - rv = pmbus_check_status_cml(client, page); - pmbus_clear_fault_page(client, page); - return rv >= 0; -} -EXPORT_SYMBOL_GPL(pmbus_check_byte_register); - -bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) -{ - int rv; - struct pmbus_data *data = i2c_get_clientdata(client); - - rv = pmbus_read_word_data(client, page, reg); - if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) - rv = pmbus_check_status_cml(client, page); - pmbus_clear_fault_page(client, page); - return rv >= 0; -} -EXPORT_SYMBOL_GPL(pmbus_check_word_register); - -const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) -{ - struct pmbus_data *data = i2c_get_clientdata(client); - - return data->info; -} -EXPORT_SYMBOL_GPL(pmbus_get_driver_info); - -static int pmbus_get_status(struct i2c_client *client, int page, int reg) -{ - struct pmbus_data *data = i2c_get_clientdata(client); - const struct pmbus_driver_info *info = data->info; - int status; - - if (info->get_status) { - status = info->get_status(client, page, reg); - if (status != -ENODATA) - return status; - } - return pmbus_read_byte_data(client, page, reg); -} - -static struct pmbus_data *pmbus_update_device(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct pmbus_data *data = i2c_get_clientdata(client); - const struct pmbus_driver_info *info = data->info; - - mutex_lock(&data->update_lock); - if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { - int i; - - for (i = 0; i < info->pages; i++) - data->status[PB_STATUS_BASE + i] - = pmbus_read_byte_data(client, i, - PMBUS_STATUS_BYTE); - for (i = 0; i < info->pages; i++) { - if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT)) - continue; - data->status[PB_STATUS_VOUT_BASE + i] - = pmbus_get_status(client, i, PMBUS_STATUS_VOUT); - } - for (i = 0; i < info->pages; i++) { - if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT)) - continue; - data->status[PB_STATUS_IOUT_BASE + i] - = pmbus_get_status(client, i, PMBUS_STATUS_IOUT); - } - for (i = 0; i < info->pages; i++) { - if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP)) - continue; - data->status[PB_STATUS_TEMP_BASE + i] - = pmbus_get_status(client, i, - PMBUS_STATUS_TEMPERATURE); - } - for (i = 0; i < info->pages; i++) { - if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12)) - continue; - data->status[PB_STATUS_FAN_BASE + i] - = pmbus_get_status(client, i, PMBUS_STATUS_FAN_12); - } - - for (i = 0; i < info->pages; i++) { - if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34)) - continue; - data->status[PB_STATUS_FAN34_BASE + i] - = pmbus_get_status(client, i, PMBUS_STATUS_FAN_34); - } - - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) - data->status[PB_STATUS_INPUT_BASE] - = pmbus_get_status(client, 0, PMBUS_STATUS_INPUT); - - for (i = 0; i < data->num_sensors; i++) { - struct pmbus_sensor *sensor = &data->sensors[i]; - - if (!data->valid || sensor->update) - sensor->data - = pmbus_read_word_data(client, sensor->page, - sensor->reg); - } - pmbus_clear_faults(client); - data->last_updated = jiffies; - data->valid = 1; - } - mutex_unlock(&data->update_lock); - return data; -} - -/* - * Convert linear sensor values to milli- or micro-units - * depending on sensor type. - */ -static int pmbus_reg2data_linear(struct pmbus_data *data, - struct pmbus_sensor *sensor) -{ - s16 exponent; - s32 mantissa; - long val; - - if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ - exponent = data->exponent; - mantissa = (u16) sensor->data; - } else { /* LINEAR11 */ - exponent = (sensor->data >> 11) & 0x001f; - mantissa = sensor->data & 0x07ff; - - if (exponent > 0x0f) - exponent |= 0xffe0; /* sign extend exponent */ - if (mantissa > 0x03ff) - mantissa |= 0xfffff800; /* sign extend mantissa */ - } - - val = mantissa; - - /* scale result to milli-units for all sensors except fans */ - if (sensor->class != PSC_FAN) - val = val * 1000L; - - /* scale result to micro-units for power sensors */ - if (sensor->class == PSC_POWER) - val = val * 1000L; - - if (exponent >= 0) - val <<= exponent; - else - val >>= -exponent; - - return (int)val; -} - -/* - * Convert direct sensor values to milli- or micro-units - * depending on sensor type. - */ -static int pmbus_reg2data_direct(struct pmbus_data *data, - struct pmbus_sensor *sensor) -{ - long val = (s16) sensor->data; - long m, b, R; - - m = data->info->m[sensor->class]; - b = data->info->b[sensor->class]; - R = data->info->R[sensor->class]; - - if (m == 0) - return 0; - - /* X = 1/m * (Y * 10^-R - b) */ - R = -R; - /* scale result to milli-units for everything but fans */ - if (sensor->class != PSC_FAN) { - R += 3; - b *= 1000; - } - - /* scale result to micro-units for power sensors */ - if (sensor->class == PSC_POWER) { - R += 3; - b *= 1000; - } - - while (R > 0) { - val *= 10; - R--; - } - while (R < 0) { - val = DIV_ROUND_CLOSEST(val, 10); - R++; - } - - return (int)((val - b) / m); -} - -static int pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) -{ - int val; - - if (data->info->direct[sensor->class]) - val = pmbus_reg2data_direct(data, sensor); - else - val = pmbus_reg2data_linear(data, sensor); - - return val; -} - -#define MAX_MANTISSA (1023 * 1000) -#define MIN_MANTISSA (511 * 1000) - -static u16 pmbus_data2reg_linear(struct pmbus_data *data, - enum pmbus_sensor_classes class, long val) -{ - s16 exponent = 0, mantissa; - bool negative = false; - - /* simple case */ - if (val == 0) - return 0; - - if (class == PSC_VOLTAGE_OUT) { - /* LINEAR16 does not support negative voltages */ - if (val < 0) - return 0; - - /* - * For a static exponents, we don't have a choice - * but to adjust the value to it. - */ - if (data->exponent < 0) - val <<= -data->exponent; - else - val >>= data->exponent; - val = DIV_ROUND_CLOSEST(val, 1000); - return val & 0xffff; - } - - if (val < 0) { - negative = true; - val = -val; - } - - /* Power is in uW. Convert to mW before converting. */ - if (class == PSC_POWER) - val = DIV_ROUND_CLOSEST(val, 1000L); - - /* - * For simplicity, convert fan data to milli-units - * before calculating the exponent. - */ - if (class == PSC_FAN) - val = val * 1000; - - /* Reduce large mantissa until it fits into 10 bit */ - while (val >= MAX_MANTISSA && exponent < 15) { - exponent++; - val >>= 1; - } - /* Increase small mantissa to improve precision */ - while (val < MIN_MANTISSA && exponent > -15) { - exponent--; - val <<= 1; - } - - /* Convert mantissa from milli-units to units */ - mantissa = DIV_ROUND_CLOSEST(val, 1000); - - /* Ensure that resulting number is within range */ - if (mantissa > 0x3ff) - mantissa = 0x3ff; - - /* restore sign */ - if (negative) - mantissa = -mantissa; - - /* Convert to 5 bit exponent, 11 bit mantissa */ - return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); -} - -static u16 pmbus_data2reg_direct(struct pmbus_data *data, - enum pmbus_sensor_classes class, long val) -{ - long m, b, R; - - m = data->info->m[class]; - b = data->info->b[class]; - R = data->info->R[class]; - - /* Power is in uW. Adjust R and b. */ - if (class == PSC_POWER) { - R -= 3; - b *= 1000; - } - - /* Calculate Y = (m * X + b) * 10^R */ - if (class != PSC_FAN) { - R -= 3; /* Adjust R and b for data in milli-units */ - b *= 1000; - } - val = val * m + b; - - while (R > 0) { - val *= 10; - R--; - } - while (R < 0) { - val = DIV_ROUND_CLOSEST(val, 10); - R++; - } - - return val; -} - -static u16 pmbus_data2reg(struct pmbus_data *data, - enum pmbus_sensor_classes class, long val) -{ - u16 regval; - - if (data->info->direct[class]) - regval = pmbus_data2reg_direct(data, class, val); - else - regval = pmbus_data2reg_linear(data, class, val); - - return regval; -} - -/* - * Return boolean calculated from converted data. - * <index> defines a status register index and mask, and optionally - * two sensor indexes. - * The upper half-word references the two sensors, - * two sensor indices. - * The upper half-word references the two optional sensors, - * the lower half word references status register and mask. - * The function returns true if (status[reg] & mask) is true and, - * if specified, if v1 >= v2. - * To determine if an object exceeds upper limits, specify <v, limit>. - * To determine if an object exceeds lower limits, specify <limit, v>. - * - * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of - * index are set. s1 and s2 (the sensor index values) are zero in this case. - * The function returns true if (status[reg] & mask) is true. - * - * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against - * a specified limit has to be performed to determine the boolean result. - * In this case, the function returns true if v1 >= v2 (where v1 and v2 are - * sensor values referenced by sensor indices s1 and s2). - * - * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. - * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. - * - * If a negative value is stored in any of the referenced registers, this value - * reflects an error code which will be returned. - */ -static int pmbus_get_boolean(struct pmbus_data *data, int index, int *val) -{ - u8 s1 = (index >> 24) & 0xff; - u8 s2 = (index >> 16) & 0xff; - u8 reg = (index >> 8) & 0xff; - u8 mask = index & 0xff; - int status; - u8 regval; - - status = data->status[reg]; - if (status < 0) - return status; - - regval = status & mask; - if (!s1 && !s2) - *val = !!regval; - else { - int v1, v2; - struct pmbus_sensor *sensor1, *sensor2; - - sensor1 = &data->sensors[s1]; - if (sensor1->data < 0) - return sensor1->data; - sensor2 = &data->sensors[s2]; - if (sensor2->data < 0) - return sensor2->data; - - v1 = pmbus_reg2data(data, sensor1); - v2 = pmbus_reg2data(data, sensor2); - *val = !!(regval && v1 >= v2); - } - return 0; -} - -static ssize_t pmbus_show_boolean(struct device *dev, - struct device_attribute *da, char *buf) -{ - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct pmbus_data *data = pmbus_update_device(dev); - int val; - int err; - - err = pmbus_get_boolean(data, attr->index, &val); - if (err) - return err; - return snprintf(buf, PAGE_SIZE, "%d\n", val); -} - -static ssize_t pmbus_show_sensor(struct device *dev, - struct device_attribute *da, char *buf) -{ - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct pmbus_data *data = pmbus_update_device(dev); - struct pmbus_sensor *sensor; - - sensor = &data->sensors[attr->index]; - if (sensor->data < 0) - return sensor->data; - - return snprintf(buf, PAGE_SIZE, "%d\n", pmbus_reg2data(data, sensor)); -} - -static ssize_t pmbus_set_sensor(struct device *dev, - struct device_attribute *devattr, - const char *buf, size_t count) -{ - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); - struct i2c_client *client = to_i2c_client(dev); - struct pmbus_data *data = i2c_get_clientdata(client); - struct pmbus_sensor *sensor = &data->sensors[attr->index]; - ssize_t rv = count; - long val = 0; - int ret; - u16 regval; - - if (strict_strtol(buf, 10, &val) < 0) - return -EINVAL; - - mutex_lock(&data->update_lock); - regval = pmbus_data2reg(data, sensor->class, val); - ret = pmbus_write_word_data(client, sensor->page, sensor->reg, regval); - if (ret < 0) - rv = ret; - else - data->sensors[attr->index].data = regval; - mutex_unlock(&data->update_lock); - return rv; -} - -static ssize_t pmbus_show_label(struct device *dev, - struct device_attribute *da, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - struct pmbus_data *data = i2c_get_clientdata(client); - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - - return snprintf(buf, PAGE_SIZE, "%s\n", - data->labels[attr->index].label); -} - -#define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \ -do { \ - struct sensor_device_attribute *a \ - = &data->_type##s[data->num_##_type##s].attribute; \ - BUG_ON(data->num_attributes >= data->max_attributes); \ - a->dev_attr.attr.name = _name; \ - a->dev_attr.attr.mode = _mode; \ - a->dev_attr.show = _show; \ - a->dev_attr.store = _set; \ - a->index = _idx; \ - data->attributes[data->num_attributes] = &a->dev_attr.attr; \ - data->num_attributes++; \ -} while (0) - -#define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \ - PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \ - pmbus_show_##_type, NULL) - -#define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \ - PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \ - pmbus_show_##_type, pmbus_set_##_type) - -static void pmbus_add_boolean(struct pmbus_data *data, - const char *name, const char *type, int seq, - int idx) -{ - struct pmbus_boolean *boolean; - - BUG_ON(data->num_booleans >= data->max_booleans); - - boolean = &data->booleans[data->num_booleans]; - - snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", - name, seq, type); - PMBUS_ADD_GET_ATTR(data, boolean->name, boolean, idx); - data->num_booleans++; -} - -static void pmbus_add_boolean_reg(struct pmbus_data *data, - const char *name, const char *type, - int seq, int reg, int bit) -{ - pmbus_add_boolean(data, name, type, seq, (reg << 8) | bit); -} - -static void pmbus_add_boolean_cmp(struct pmbus_data *data, - const char *name, const char *type, - int seq, int i1, int i2, int reg, int mask) -{ - pmbus_add_boolean(data, name, type, seq, - (i1 << 24) | (i2 << 16) | (reg << 8) | mask); -} - -static void pmbus_add_sensor(struct pmbus_data *data, - const char *name, const char *type, int seq, - int page, int reg, enum pmbus_sensor_classes class, - bool update, bool readonly) -{ - struct pmbus_sensor *sensor; - - BUG_ON(data->num_sensors >= data->max_sensors); - - sensor = &data->sensors[data->num_sensors]; - snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", - name, seq, type); - sensor->page = page; - sensor->reg = reg; - sensor->class = class; - sensor->update = update; - if (readonly) - PMBUS_ADD_GET_ATTR(data, sensor->name, sensor, - data->num_sensors); - else - PMBUS_ADD_SET_ATTR(data, sensor->name, sensor, - data->num_sensors); - data->num_sensors++; -} - -static void pmbus_add_label(struct pmbus_data *data, - const char *name, int seq, - const char *lstring, int index) -{ - struct pmbus_label *label; - - BUG_ON(data->num_labels >= data->max_labels); - - label = &data->labels[data->num_labels]; - snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); - if (!index) - strncpy(label->label, lstring, sizeof(label->label) - 1); - else - snprintf(label->label, sizeof(label->label), "%s%d", lstring, - index); - - PMBUS_ADD_GET_ATTR(data, label->name, label, data->num_labels); - data->num_labels++; -} - -static const int pmbus_temp_registers[] = { - PMBUS_READ_TEMPERATURE_1, - PMBUS_READ_TEMPERATURE_2, - PMBUS_READ_TEMPERATURE_3 -}; - -static const int pmbus_temp_flags[] = { - PMBUS_HAVE_TEMP, - PMBUS_HAVE_TEMP2, - PMBUS_HAVE_TEMP3 -}; - -static const int pmbus_fan_registers[] = { - PMBUS_READ_FAN_SPEED_1, - PMBUS_READ_FAN_SPEED_2, - PMBUS_READ_FAN_SPEED_3, - PMBUS_READ_FAN_SPEED_4 -}; - -static const int pmbus_fan_config_registers[] = { - PMBUS_FAN_CONFIG_12, - PMBUS_FAN_CONFIG_12, - PMBUS_FAN_CONFIG_34, - PMBUS_FAN_CONFIG_34 -}; - -static const int pmbus_fan_status_registers[] = { - PMBUS_STATUS_FAN_12, - PMBUS_STATUS_FAN_12, - PMBUS_STATUS_FAN_34, - PMBUS_STATUS_FAN_34 -}; - -static const u32 pmbus_fan_flags[] = { - PMBUS_HAVE_FAN12, - PMBUS_HAVE_FAN12, - PMBUS_HAVE_FAN34, - PMBUS_HAVE_FAN34 -}; - -static const u32 pmbus_fan_status_flags[] = { - PMBUS_HAVE_STATUS_FAN12, - PMBUS_HAVE_STATUS_FAN12, - PMBUS_HAVE_STATUS_FAN34, - PMBUS_HAVE_STATUS_FAN34 -}; - -/* - * Determine maximum number of sensors, booleans, and labels. - * To keep things simple, only make a rough high estimate. - */ -static void pmbus_find_max_attr(struct i2c_client *client, - struct pmbus_data *data) -{ - const struct pmbus_driver_info *info = data->info; - int page, max_sensors, max_booleans, max_labels; - - max_sensors = PMBUS_MAX_INPUT_SENSORS; - max_booleans = PMBUS_MAX_INPUT_BOOLEANS; - max_labels = PMBUS_MAX_INPUT_LABELS; - - for (page = 0; page < info->pages; page++) { - if (info->func[page] & PMBUS_HAVE_VOUT) { - max_sensors += PMBUS_VOUT_SENSORS_PER_PAGE; - max_booleans += PMBUS_VOUT_BOOLEANS_PER_PAGE; - max_labels++; - } - if (info->func[page] & PMBUS_HAVE_IOUT) { - max_sensors += PMBUS_IOUT_SENSORS_PER_PAGE; - max_booleans += PMBUS_IOUT_BOOLEANS_PER_PAGE; - max_labels++; - } - if (info->func[page] & PMBUS_HAVE_POUT) { - max_sensors += PMBUS_POUT_SENSORS_PER_PAGE; - max_booleans += PMBUS_POUT_BOOLEANS_PER_PAGE; - max_labels++; - } - if (info->func[page] & PMBUS_HAVE_FAN12) { - max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN; - max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN; - } - if (info->func[page] & PMBUS_HAVE_FAN34) { - max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN; - max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN; - } - if (info->func[page] & PMBUS_HAVE_TEMP) { - max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; - max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; - } - if (info->func[page] & PMBUS_HAVE_TEMP2) { - max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; - max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; - } - if (info->func[page] & PMBUS_HAVE_TEMP3) { - max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; - max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; - } - } - data->max_sensors = max_sensors; - data->max_booleans = max_booleans; - data->max_labels = max_labels; - data->max_attributes = max_sensors + max_booleans + max_labels; -} - -/* - * Search for attributes. Allocate sensors, booleans, and labels as needed. - */ -static void pmbus_find_attributes(struct i2c_client *client, - struct pmbus_data *data) -{ - const struct pmbus_driver_info *info = data->info; - int page, i0, i1, in_index; - - /* - * Input voltage sensors - */ - in_index = 1; - if (info->func[0] & PMBUS_HAVE_VIN) { - bool have_alarm = false; - - i0 = data->num_sensors; - pmbus_add_label(data, "in", in_index, "vin", 0); - pmbus_add_sensor(data, "in", "input", in_index, 0, - PMBUS_READ_VIN, PSC_VOLTAGE_IN, true, true); - if (pmbus_check_word_register(client, 0, - PMBUS_VIN_UV_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "min", in_index, - 0, PMBUS_VIN_UV_WARN_LIMIT, - PSC_VOLTAGE_IN, false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { - pmbus_add_boolean_reg(data, "in", "min_alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_VOLTAGE_UV_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, 0, - PMBUS_VIN_UV_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "lcrit", in_index, - 0, PMBUS_VIN_UV_FAULT_LIMIT, - PSC_VOLTAGE_IN, false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { - pmbus_add_boolean_reg(data, "in", "lcrit_alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_VOLTAGE_UV_FAULT); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, 0, - PMBUS_VIN_OV_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "max", in_index, - 0, PMBUS_VIN_OV_WARN_LIMIT, - PSC_VOLTAGE_IN, false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { - pmbus_add_boolean_reg(data, "in", "max_alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_VOLTAGE_OV_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, 0, - PMBUS_VIN_OV_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "crit", in_index, - 0, PMBUS_VIN_OV_FAULT_LIMIT, - PSC_VOLTAGE_IN, false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { - pmbus_add_boolean_reg(data, "in", "crit_alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_VOLTAGE_OV_FAULT); - have_alarm = true; - } - } - /* - * Add generic alarm attribute only if there are no individual - * attributes. - */ - if (!have_alarm) - pmbus_add_boolean_reg(data, "in", "alarm", - in_index, - PB_STATUS_BASE, - PB_STATUS_VIN_UV); - in_index++; - } - if (info->func[0] & PMBUS_HAVE_VCAP) { - pmbus_add_label(data, "in", in_index, "vcap", 0); - pmbus_add_sensor(data, "in", "input", in_index, 0, - PMBUS_READ_VCAP, PSC_VOLTAGE_IN, true, true); - in_index++; - } - - /* - * Output voltage sensors - */ - for (page = 0; page < info->pages; page++) { - bool have_alarm = false; - - if (!(info->func[page] & PMBUS_HAVE_VOUT)) - continue; - - i0 = data->num_sensors; - pmbus_add_label(data, "in", in_index, "vout", page + 1); - pmbus_add_sensor(data, "in", "input", in_index, page, - PMBUS_READ_VOUT, PSC_VOLTAGE_OUT, true, true); - if (pmbus_check_word_register(client, page, - PMBUS_VOUT_UV_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "min", in_index, page, - PMBUS_VOUT_UV_WARN_LIMIT, - PSC_VOLTAGE_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { - pmbus_add_boolean_reg(data, "in", "min_alarm", - in_index, - PB_STATUS_VOUT_BASE + - page, - PB_VOLTAGE_UV_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_VOUT_UV_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "lcrit", in_index, page, - PMBUS_VOUT_UV_FAULT_LIMIT, - PSC_VOLTAGE_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { - pmbus_add_boolean_reg(data, "in", "lcrit_alarm", - in_index, - PB_STATUS_VOUT_BASE + - page, - PB_VOLTAGE_UV_FAULT); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_VOUT_OV_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "max", in_index, page, - PMBUS_VOUT_OV_WARN_LIMIT, - PSC_VOLTAGE_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { - pmbus_add_boolean_reg(data, "in", "max_alarm", - in_index, - PB_STATUS_VOUT_BASE + - page, - PB_VOLTAGE_OV_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_VOUT_OV_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "in", "crit", in_index, page, - PMBUS_VOUT_OV_FAULT_LIMIT, - PSC_VOLTAGE_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { - pmbus_add_boolean_reg(data, "in", "crit_alarm", - in_index, - PB_STATUS_VOUT_BASE + - page, - PB_VOLTAGE_OV_FAULT); - have_alarm = true; - } - } - /* - * Add generic alarm attribute only if there are no individual - * attributes. - */ - if (!have_alarm) - pmbus_add_boolean_reg(data, "in", "alarm", - in_index, - PB_STATUS_BASE + page, - PB_STATUS_VOUT_OV); - in_index++; - } - - /* - * Current sensors - */ - - /* - * Input current sensors - */ - in_index = 1; - if (info->func[0] & PMBUS_HAVE_IIN) { - i0 = data->num_sensors; - pmbus_add_label(data, "curr", in_index, "iin", 0); - pmbus_add_sensor(data, "curr", "input", in_index, 0, - PMBUS_READ_IIN, PSC_CURRENT_IN, true, true); - if (pmbus_check_word_register(client, 0, - PMBUS_IIN_OC_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "curr", "max", in_index, - 0, PMBUS_IIN_OC_WARN_LIMIT, - PSC_CURRENT_IN, false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { - pmbus_add_boolean_reg(data, "curr", "max_alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_IIN_OC_WARNING); - } - } - if (pmbus_check_word_register(client, 0, - PMBUS_IIN_OC_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "curr", "crit", in_index, - 0, PMBUS_IIN_OC_FAULT_LIMIT, - PSC_CURRENT_IN, false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) - pmbus_add_boolean_reg(data, "curr", - "crit_alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_IIN_OC_FAULT); - } - in_index++; - } - - /* - * Output current sensors - */ - for (page = 0; page < info->pages; page++) { - bool have_alarm = false; - - if (!(info->func[page] & PMBUS_HAVE_IOUT)) - continue; - - i0 = data->num_sensors; - pmbus_add_label(data, "curr", in_index, "iout", page + 1); - pmbus_add_sensor(data, "curr", "input", in_index, page, - PMBUS_READ_IOUT, PSC_CURRENT_OUT, true, true); - if (pmbus_check_word_register(client, page, - PMBUS_IOUT_OC_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "curr", "max", in_index, page, - PMBUS_IOUT_OC_WARN_LIMIT, - PSC_CURRENT_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) { - pmbus_add_boolean_reg(data, "curr", "max_alarm", - in_index, - PB_STATUS_IOUT_BASE + - page, PB_IOUT_OC_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_IOUT_UC_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "curr", "lcrit", in_index, page, - PMBUS_IOUT_UC_FAULT_LIMIT, - PSC_CURRENT_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) { - pmbus_add_boolean_reg(data, "curr", - "lcrit_alarm", - in_index, - PB_STATUS_IOUT_BASE + - page, PB_IOUT_UC_FAULT); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_IOUT_OC_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "curr", "crit", in_index, page, - PMBUS_IOUT_OC_FAULT_LIMIT, - PSC_CURRENT_OUT, false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) { - pmbus_add_boolean_reg(data, "curr", - "crit_alarm", - in_index, - PB_STATUS_IOUT_BASE + - page, PB_IOUT_OC_FAULT); - have_alarm = true; - } - } - /* - * Add generic alarm attribute only if there are no individual - * attributes. - */ - if (!have_alarm) - pmbus_add_boolean_reg(data, "curr", "alarm", - in_index, - PB_STATUS_BASE + page, - PB_STATUS_IOUT_OC); - in_index++; - } - - /* - * Power sensors - */ - /* - * Input Power sensors - */ - in_index = 1; - if (info->func[0] & PMBUS_HAVE_PIN) { - i0 = data->num_sensors; - pmbus_add_label(data, "power", in_index, "pin", 0); - pmbus_add_sensor(data, "power", "input", in_index, - 0, PMBUS_READ_PIN, PSC_POWER, true, true); - if (pmbus_check_word_register(client, 0, - PMBUS_PIN_OP_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "power", "max", in_index, - 0, PMBUS_PIN_OP_WARN_LIMIT, PSC_POWER, - false, false); - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) - pmbus_add_boolean_reg(data, "power", - "alarm", - in_index, - PB_STATUS_INPUT_BASE, - PB_PIN_OP_WARNING); - } - in_index++; - } - - /* - * Output Power sensors - */ - for (page = 0; page < info->pages; page++) { - bool need_alarm = false; - - if (!(info->func[page] & PMBUS_HAVE_POUT)) - continue; - - i0 = data->num_sensors; - pmbus_add_label(data, "power", in_index, "pout", page + 1); - pmbus_add_sensor(data, "power", "input", in_index, page, - PMBUS_READ_POUT, PSC_POWER, true, true); - /* - * Per hwmon sysfs API, power_cap is to be used to limit output - * power. - * We have two registers related to maximum output power, - * PMBUS_POUT_MAX and PMBUS_POUT_OP_WARN_LIMIT. - * PMBUS_POUT_MAX matches the powerX_cap attribute definition. - * There is no attribute in the API to match - * PMBUS_POUT_OP_WARN_LIMIT. We use powerX_max for now. - */ - if (pmbus_check_word_register(client, page, PMBUS_POUT_MAX)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "power", "cap", in_index, page, - PMBUS_POUT_MAX, PSC_POWER, - false, false); - need_alarm = true; - } - if (pmbus_check_word_register(client, page, - PMBUS_POUT_OP_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "power", "max", in_index, page, - PMBUS_POUT_OP_WARN_LIMIT, PSC_POWER, - false, false); - need_alarm = true; - } - if (need_alarm && (info->func[page] & PMBUS_HAVE_STATUS_IOUT)) - pmbus_add_boolean_reg(data, "power", "alarm", - in_index, - PB_STATUS_IOUT_BASE + page, - PB_POUT_OP_WARNING - | PB_POWER_LIMITING); - - if (pmbus_check_word_register(client, page, - PMBUS_POUT_OP_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "power", "crit", in_index, page, - PMBUS_POUT_OP_FAULT_LIMIT, PSC_POWER, - false, false); - if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) - pmbus_add_boolean_reg(data, "power", - "crit_alarm", - in_index, - PB_STATUS_IOUT_BASE - + page, - PB_POUT_OP_FAULT); - } - in_index++; - } - - /* - * Temperature sensors - */ - in_index = 1; - for (page = 0; page < info->pages; page++) { - int t; - - for (t = 0; t < ARRAY_SIZE(pmbus_temp_registers); t++) { - bool have_alarm = false; - - /* - * A PMBus chip may support any combination of - * temperature registers on any page. So we can not - * abort after a failure to detect a register, but have - * to continue checking for all registers on all pages. - */ - if (!(info->func[page] & pmbus_temp_flags[t])) - continue; - - if (!pmbus_check_word_register - (client, page, pmbus_temp_registers[t])) - continue; - - i0 = data->num_sensors; - pmbus_add_sensor(data, "temp", "input", in_index, page, - pmbus_temp_registers[t], - PSC_TEMPERATURE, true, true); - - /* - * PMBus provides only one status register for TEMP1-3. - * Thus, we can not use the status register to determine - * which of the three sensors actually caused an alarm. - * Always compare current temperature against the limit - * registers to determine alarm conditions for a - * specific sensor. - * - * Since there is only one set of limit registers for - * up to three temperature sensors, we need to update - * all limit registers after the limit was changed for - * one of the sensors. This ensures that correct limits - * are reported for all temperature sensors. - */ - if (pmbus_check_word_register - (client, page, PMBUS_UT_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "temp", "min", in_index, - page, PMBUS_UT_WARN_LIMIT, - PSC_TEMPERATURE, true, false); - if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { - pmbus_add_boolean_cmp(data, "temp", - "min_alarm", in_index, i1, i0, - PB_STATUS_TEMP_BASE + page, - PB_TEMP_UT_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_UT_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "temp", "lcrit", - in_index, page, - PMBUS_UT_FAULT_LIMIT, - PSC_TEMPERATURE, true, false); - if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { - pmbus_add_boolean_cmp(data, "temp", - "lcrit_alarm", in_index, i1, i0, - PB_STATUS_TEMP_BASE + page, - PB_TEMP_UT_FAULT); - have_alarm = true; - } - } - if (pmbus_check_word_register - (client, page, PMBUS_OT_WARN_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "temp", "max", in_index, - page, PMBUS_OT_WARN_LIMIT, - PSC_TEMPERATURE, true, false); - if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { - pmbus_add_boolean_cmp(data, "temp", - "max_alarm", in_index, i0, i1, - PB_STATUS_TEMP_BASE + page, - PB_TEMP_OT_WARNING); - have_alarm = true; - } - } - if (pmbus_check_word_register(client, page, - PMBUS_OT_FAULT_LIMIT)) { - i1 = data->num_sensors; - pmbus_add_sensor(data, "temp", "crit", in_index, - page, PMBUS_OT_FAULT_LIMIT, - PSC_TEMPERATURE, true, false); - if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { - pmbus_add_boolean_cmp(data, "temp", - "crit_alarm", in_index, i0, i1, - PB_STATUS_TEMP_BASE + page, - PB_TEMP_OT_FAULT); - have_alarm = true; - } - } - /* - * Last resort - we were not able to create any alarm - * registers. Report alarm for all sensors using the - * status register temperature alarm bit. - */ - if (!have_alarm) - pmbus_add_boolean_reg(data, "temp", "alarm", - in_index, - PB_STATUS_BASE + page, - PB_STATUS_TEMPERATURE); - in_index++; - } - } - - /* - * Fans - */ - in_index = 1; - for (page = 0; page < info->pages; page++) { - int f; - - for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) { - int regval; - - if (!(info->func[page] & pmbus_fan_flags[f])) - break; - - if (!pmbus_check_word_register(client, page, - pmbus_fan_registers[f]) - || !pmbus_check_byte_register(client, page, - pmbus_fan_config_registers[f])) - break; - - /* - * Skip fan if not installed. - * Each fan configuration register covers multiple fans, - * so we have to do some magic. - */ - regval = pmbus_read_byte_data(client, page, - pmbus_fan_config_registers[f]); - if (regval < 0 || - (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) - continue; - - i0 = data->num_sensors; - pmbus_add_sensor(data, "fan", "input", in_index, page, - pmbus_fan_registers[f], PSC_FAN, true, - true); - - /* - * Each fan status register covers multiple fans, - * so we have to do some magic. - */ - if ((info->func[page] & pmbus_fan_status_flags[f]) && - pmbus_check_byte_register(client, - page, pmbus_fan_status_registers[f])) { - int base; - - if (f > 1) /* fan 3, 4 */ - base = PB_STATUS_FAN34_BASE + page; - else - base = PB_STATUS_FAN_BASE + page; - pmbus_add_boolean_reg(data, "fan", "alarm", - in_index, base, - PB_FAN_FAN1_WARNING >> (f & 1)); - pmbus_add_boolean_reg(data, "fan", "fault", - in_index, base, - PB_FAN_FAN1_FAULT >> (f & 1)); - } - in_index++; - } - } -} - -/* - * Identify chip parameters. - * This function is called for all chips. - */ -static int pmbus_identify_common(struct i2c_client *client, - struct pmbus_data *data) -{ - int vout_mode = -1, exponent; - - if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) - vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); - if (vout_mode >= 0 && vout_mode != 0xff) { - /* - * Not all chips support the VOUT_MODE command, - * so a failure to read it is not an error. - */ - switch (vout_mode >> 5) { - case 0: /* linear mode */ - if (data->info->direct[PSC_VOLTAGE_OUT]) - return -ENODEV; - - exponent = vout_mode & 0x1f; - /* and sign-extend it */ - if (exponent & 0x10) - exponent |= ~0x1f; - data->exponent = exponent; - break; - case 2: /* direct mode */ - if (!data->info->direct[PSC_VOLTAGE_OUT]) - return -ENODEV; - break; - default: - return -ENODEV; - } - } - - /* Determine maximum number of sensors, booleans, and labels */ - pmbus_find_max_attr(client, data); - pmbus_clear_fault_page(client, 0); - return 0; -} - -int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, - struct pmbus_driver_info *info) -{ - const struct pmbus_platform_data *pdata = client->dev.platform_data; - struct pmbus_data *data; - int ret; - - if (!info) { - dev_err(&client->dev, "Missing chip information"); - return -ENODEV; - } - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE - | I2C_FUNC_SMBUS_BYTE_DATA - | I2C_FUNC_SMBUS_WORD_DATA)) - return -ENODEV; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) { - dev_err(&client->dev, "No memory to allocate driver data\n"); - return -ENOMEM; - } - - i2c_set_clientdata(client, data); - mutex_init(&data->update_lock); - - /* - * Bail out if status register or PMBus revision register - * does not exist. - */ - if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0 - || i2c_smbus_read_byte_data(client, PMBUS_REVISION) < 0) { - dev_err(&client->dev, - "Status or revision register not found\n"); - ret = -ENODEV; - goto out_data; - } - - if (pdata) - data->flags = pdata->flags; - data->info = info; - - pmbus_clear_faults(client); - - if (info->identify) { - ret = (*info->identify)(client, info); - if (ret < 0) { - dev_err(&client->dev, "Chip identification failed\n"); - goto out_data; - } - } - - if (info->pages <= 0 || info->pages > PMBUS_PAGES) { - dev_err(&client->dev, "Bad number of PMBus pages: %d\n", - info->pages); - ret = -EINVAL; - goto out_data; - } - /* - * Bail out if more than one page was configured, but we can not - * select the highest page. This is an indication that the wrong - * chip type was selected. Better bail out now than keep - * returning errors later on. - */ - if (info->pages > 1 && pmbus_set_page(client, info->pages - 1) < 0) { - dev_err(&client->dev, "Failed to select page %d\n", - info->pages - 1); - ret = -EINVAL; - goto out_data; - } - - ret = pmbus_identify_common(client, data); - if (ret < 0) { - dev_err(&client->dev, "Failed to identify chip capabilities\n"); - goto out_data; - } - - ret = -ENOMEM; - data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors, - GFP_KERNEL); - if (!data->sensors) { - dev_err(&client->dev, "No memory to allocate sensor data\n"); - goto out_data; - } - - data->booleans = kzalloc(sizeof(struct pmbus_boolean) - * data->max_booleans, GFP_KERNEL); - if (!data->booleans) { - dev_err(&client->dev, "No memory to allocate boolean data\n"); - goto out_sensors; - } - - data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels, - GFP_KERNEL); - if (!data->labels) { - dev_err(&client->dev, "No memory to allocate label data\n"); - goto out_booleans; - } - - data->attributes = kzalloc(sizeof(struct attribute *) - * data->max_attributes, GFP_KERNEL); - if (!data->attributes) { - dev_err(&client->dev, "No memory to allocate attribute data\n"); - goto out_labels; - } - - pmbus_find_attributes(client, data); - - /* - * If there are no attributes, something is wrong. - * Bail out instead of trying to register nothing. - */ - if (!data->num_attributes) { - dev_err(&client->dev, "No attributes found\n"); - ret = -ENODEV; - goto out_attributes; - } - - /* Register sysfs hooks */ - data->group.attrs = data->attributes; - ret = sysfs_create_group(&client->dev.kobj, &data->group); - if (ret) { - dev_err(&client->dev, "Failed to create sysfs entries\n"); - goto out_attributes; - } - data->hwmon_dev = hwmon_device_register(&client->dev); - if (IS_ERR(data->hwmon_dev)) { - ret = PTR_ERR(data->hwmon_dev); - dev_err(&client->dev, "Failed to register hwmon device\n"); - goto out_hwmon_device_register; - } - return 0; - -out_hwmon_device_register: - sysfs_remove_group(&client->dev.kobj, &data->group); -out_attributes: - kfree(data->attributes); -out_labels: - kfree(data->labels); -out_booleans: - kfree(data->booleans); -out_sensors: - kfree(data->sensors); -out_data: - kfree(data); - return ret; -} -EXPORT_SYMBOL_GPL(pmbus_do_probe); - -int pmbus_do_remove(struct i2c_client *client) -{ - struct pmbus_data *data = i2c_get_clientdata(client); - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &data->group); - kfree(data->attributes); - kfree(data->labels); - kfree(data->booleans); - kfree(data->sensors); - kfree(data); - return 0; -} -EXPORT_SYMBOL_GPL(pmbus_do_remove); - -MODULE_AUTHOR("Guenter Roeck"); -MODULE_DESCRIPTION("PMBus core driver"); -MODULE_LICENSE("GPL"); |