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From: Guenter Roeck on 5 Jul 2010 00:20
This driver adds support for hardware monitoring features of various PMBus
devices.

Signed-off-by: Guenter Roeck <guenter.roeck(a)ericsson.com>
---
drivers/hwmon/Kconfig | 12 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/pmbus.c | 1396 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/hwmon/pmbus.h | 209 ++++++++
4 files changed, 1618 insertions(+), 0 deletions(-)
create mode 100644 drivers/hwmon/pmbus.c
create mode 100644 drivers/hwmon/pmbus.h

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index e19cf8e..8d53cf7 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -702,6 +702,18 @@ config SENSORS_PCF8591
These devices are hard to detect and rarely found on mainstream
hardware. If unsure, say N.

+config SENSORS_PMBUS
+ tristate "PMBus devices"
+ depends on I2C && EXPERIMENTAL
+ default n
+ help
+ If you say yes here you get hardware monitoring support for various
+ PMBus devices, including but not limited to BMR45x, LTC2978, MAX16064,
+ MAX8688, and UCD92xx.
+
+ This driver can also be built as a module. If so, the module will
+ be called pmbus.
+
config SENSORS_SHT15
tristate "Sensiron humidity and temperature sensors. SHT15 and compat."
depends on GENERIC_GPIO
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 2138ceb..88b043e 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -83,6 +83,7 @@ obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
+obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o
obj-$(CONFIG_SENSORS_SHT15) += sht15.o
obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
diff --git a/drivers/hwmon/pmbus.c b/drivers/hwmon/pmbus.c
new file mode 100644
index 0000000..549d915
--- /dev/null
+++ b/drivers/hwmon/pmbus.c
@@ -0,0 +1,1396 @@
+/*
+ * Hardware monitoring driver for PMBus devices
+ *
+ * Copyright (C) 2010 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 "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_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_TEMP 4 /* min_alarm, max_alarm,
+ lcrit_alarm, crit_alarm */
+
+#define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
+
+#define PMBUS_PAGES 32 /* Per PMBus specification */
+
+enum chips { ltc2978, max16064, max8688, pmbus, ucd9220, ucd9240 };
+
+enum pmbus_sensor_classes {
+ PSC_VOLTAGE = 0,
+ PSC_TEMPERATURE,
+ PSC_CURRENT,
+ PSC_POWER,
+ PSC_NUM_CLASSES /* Number of power sensor classes */
+};
+
+struct pmbus_config {
+ int pages; /* Total number of pages (= output sensors) */
+ bool direct; /* true if device uses direct data format */
+ /*
+ * Support one set of coefficients for each sensor type
+ * Used for chips providing data in direct mode.
+ */
+ int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
+ int b[PSC_NUM_CLASSES]; /* offset */
+ int R[PSC_NUM_CLASSES]; /* exponent */
+};
+
+#define PB_HAVE_STATUS_VOUT (1<<0)
+#define PB_HAVE_STATUS_IOUT (1<<1)
+#define PB_HAVE_STATUS_INPUT (1<<2)
+#define PB_HAVE_STATUS_TEMP (1<<3)
+
+/*
+ * status, status_vout, status_iout are paged.
+ * status_input and status_temp are unpaged.
+ */
+#define PB_NUM_STATUS_REG (PMBUS_PAGES * 3 + 2)
+
+/*
+ * 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_INPUT_BASE (PB_STATUS_IOUT_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 */
+ u16 data; /* Sensor data */
+};
+
+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;
+ enum chips type;
+
+ bool direct;
+ int pages;
+
+ /* Coefficients, for chips providing data in direct mode */
+ int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
+ int b[PSC_NUM_CLASSES]; /* offset */
+ int R[PSC_NUM_CLASSES]; /* exponent */
+
+ 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;
+};
+
+static const struct pmbus_config pmbus_config[] = {
+ [pmbus] = {
+ .pages = 1,
+ },
+ [ltc2978] = {
+ .pages = 8,
+ },
+ [max16064] = {
+ .pages = 4,
+ .direct = true,
+ .m[PSC_VOLTAGE] = 19995, /* Coefficients from datasheet */
+ .b[PSC_VOLTAGE] = 0,
+ .R[PSC_VOLTAGE] = -1,
+ .m[PSC_TEMPERATURE] = -7612,
+ .b[PSC_TEMPERATURE] = 335,
+ .R[PSC_TEMPERATURE] = -3,
+ },
+ [max8688] = {
+ .pages = 1,
+ .direct = true,
+ .m[PSC_VOLTAGE] = 19995, /* Coefficients from datasheet */
+ .b[PSC_VOLTAGE] = 0,
+ .R[PSC_VOLTAGE] = -1,
+ .m[PSC_TEMPERATURE] = -7612,
+ .b[PSC_TEMPERATURE] = 335,
+ .R[PSC_TEMPERATURE] = -3,
+ .m[PSC_CURRENT] = 23109,
+ .b[PSC_CURRENT] = 0,
+ .R[PSC_CURRENT] = -2,
+ },
+ [ucd9220] = {
+ .pages = 2,
+ },
+ [ucd9240] = {
+ .pages = 4,
+ },
+};
+
+static int pmbus_set_page(struct i2c_client *client, u8 page)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ int rv = 0;
+
+ if (page != data->currpage) {
+ rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
+ data->currpage = page;
+ }
+ return rv;
+}
+
+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);
+}
+
+static 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);
+}
+
+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_faults(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ int i;
+
+ for (i = 0; i < data->pages; i++)
+ pmbus_write_byte(client, i, PMBUS_CLEAR_FAULTS);
+}
+
+static bool pmbus_check_byte_register(struct i2c_client *client, int page,
+ int reg)
+{
+ return (pmbus_read_byte_data(client, page, reg) >= 0);
+}
+
+static bool pmbus_check_word_register(struct i2c_client *client, int page,
+ int reg)
+{
+ return (pmbus_read_word_data(client, page, reg) >= 0);
+}
+
+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);
+ struct pmbus_data *ret = data;
+
+ mutex_lock(&data->update_lock);
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ int i, val;
+
+ for (i = 0; i < data->pages; i++) {
+ val = pmbus_read_byte_data(client, i,
+ PMBUS_STATUS_BYTE);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->status[PB_STATUS_BASE + i] = val;
+ }
+ if (data->status_bits & PB_HAVE_STATUS_VOUT)
+ for (i = 0; i < data->pages; i++) {
+ val = pmbus_read_byte_data(client, i,
+ PMBUS_STATUS_VOUT);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->status[PB_STATUS_VOUT_BASE + i] = val;
+ }
+ if (data->status_bits & PB_HAVE_STATUS_IOUT)
+ for (i = 0; i < data->pages; i++) {
+ val = pmbus_read_byte_data(client, i,
+ PMBUS_STATUS_IOUT);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->status[PB_STATUS_IOUT_BASE + i] = val;
+ }
+ if (data->status_bits & PB_HAVE_STATUS_INPUT) {
+ val = pmbus_read_byte_data(client, 0,
+ PMBUS_STATUS_INPUT);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->status[PB_STATUS_INPUT_BASE] = val;
+ }
+ if (data->status_bits & PB_HAVE_STATUS_TEMP) {
+ val = pmbus_read_byte_data(client, 0,
+ PMBUS_STATUS_TEMPERATURE);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->status[PB_STATUS_TEMP_BASE] = val;
+ }
+ for (i = 0; i < data->num_sensors; i++) {
+ struct pmbus_sensor *sensor = &data->sensors[i];
+
+ if (!data->valid || sensor->update) {
+ val = pmbus_read_word_data(client, sensor->page,
+ sensor->reg);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ sensor->data = val;
+ }
+ }
+ pmbus_clear_faults(client);
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+/*
+ * Convert linear sensor values to milli- or micro-units
+ * depending on sensor type.
+ */
+static long pmbus_reg2data_linear(struct pmbus_data *data,
+ struct pmbus_sensor *sensor)
+{
+ s16 exponent, mantissa;
+ long val;
+
+ exponent = sensor->data >> 11;
+ mantissa = sensor->data & 0x07ff;
+
+ if (exponent > 0x0f)
+ exponent |= 0xffe0; /* sign extend exponent */
+ if (mantissa > 0x03ff)
+ mantissa |= 0xf800; /* sign extend mantissa */
+
+ /* scale result to milli-units */
+ val = mantissa * 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 val;
+}
+
+/*
+ * Convert direct sensor values to milli- or micro-units
+ * depending on sensor type.
+ */
+static long pmbus_reg2data_direct(struct pmbus_data *data,
+ struct pmbus_sensor *sensor)
+{
+ long val = (s16) sensor->data;
+ long m, b, R;
+
+ m = data->m[sensor->class];
+ b = data->b[sensor->class];
+ R = data->R[sensor->class];
+
+ if (m == 0)
+ return 0;
+
+ /* X = 1/m * (Y * 10^-R - b) */
+ R = -R + 3; /* scale result to milli-units */
+ b *= 1000; /* subtract milli-units */
+
+ /* 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 (val - b) / m;
+}
+
+static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
+{
+ long val;
+
+ if (data->direct)
+ 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 = 0;
+ bool negative = false;
+
+ /* simple case */
+ if (val == 0)
+ return 0;
+
+ 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);
+
+ /* 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->m[class];
+ b = data->b[class];
+ R = data->R[class];
+
+ /* Power is in uW. Adjust R. */
+ if (class == PSC_POWER)
+ R -= 3;
+
+ /* Calculate Y = (m * X + b) * 10^R */
+ R -= 3; /* Adjust R for data in milli-units */
+ val *= m;
+ val += b * 1000;
+
+ 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->direct)
+ regval = pmbus_data2reg_direct(data, class, val);
+ else
+ regval = pmbus_data2reg_linear(data, class, val);
+
+ return regval;
+}
+
+/* Return converted value from given object */
+static long pmbus_get_sensor(struct pmbus_data *data, int index)
+{
+ return pmbus_reg2data(data, &data->sensors[index]);
+}
+
+/*
+ * 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,
+ * 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>.
+ */
+static long pmbus_get_boolean(struct pmbus_data *data, int index)
+{
+ u8 s1 = (index >> 24) & 0xff;
+ u8 s2 = (index >> 16) & 0xff;
+ u8 reg = (index >> 8) & 0xff;
+ u8 mask = index & 0xff;
+ int rv = 0;
+ u8 regval = data->status[reg] & mask;
+
+ if (!s1 && !s2)
+ rv = !!regval;
+ else {
+ int v1, v2;
+
+ v1 = pmbus_reg2data(data, &data->sensors[s1]);
+ v2 = pmbus_reg2data(data, &data->sensors[s2]);
+ rv = !!(regval && v1 >= v2);
+ }
+ return rv;
+}
+
+#define PMBUS_SHOW_INT(what) \
+ static ssize_t pmbus_show_##what(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); \
+ long val; \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
+ val = pmbus_get_##what(data, attr->index); \
+ return snprintf(buf, PAGE_SIZE, "%ld\n", val); \
+}
+
+PMBUS_SHOW_INT(sensor);
+PMBUS_SHOW_INT(boolean);
+
+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 val)
+{
+ 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, val);
+ 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)
+{
+ 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 (update)
+ 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++;
+}
+
+/*
+ * Identify important chip parameters.
+ */
+static void pmbus_identify_generic(struct i2c_client *client,
+ struct pmbus_data *data)
+{
+ /*
+ * Check if the PAGE command is supported. If it is,
+ * keep setting the page number until it fails or until the
+ * maximum number of pages has been reached. Assume that
+ * this is the number of pages supported by the chip.
+ */
+ if (pmbus_check_byte_register(client, 0, PMBUS_PAGE)) {
+ int page;
+
+ for (page = 1; page < PMBUS_PAGES; page++) {
+ if (pmbus_set_page(client, page) < 0)
+ break;
+ }
+ pmbus_set_page(client, 0);
+ data->pages = page;
+ } else
+ data->pages = 1;
+
+ /*
+ * We should check if the COEFFICIENTS register is supported.
+ * If it is, select direct mode and read the coefficients from the
+ * chip, one set per group of sensor registers.
+ *
+ * To do this, we will need access to a chip which actually supports the
+ * COEFFICIENTS command, since the command is too complex to implement
+ * without testing it.
+ */
+}
+
+static int pmbus_temp_sensors[] = {
+ PMBUS_READ_TEMPERATURE_1,
+ PMBUS_READ_TEMPERATURE_2,
+ PMBUS_READ_TEMPERATURE_3
+};
+
+/*
+ * 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)
+{
+ int i, max_sensors, max_booleans, max_labels;
+
+ max_sensors = PMBUS_MAX_INPUT_SENSORS;
+ max_booleans = PMBUS_MAX_INPUT_BOOLEANS;
+ max_labels = PMBUS_MAX_INPUT_LABELS;
+
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_VOUT)) {
+ max_sensors += data->pages * PMBUS_VOUT_SENSORS_PER_PAGE;
+ max_booleans += data->pages * PMBUS_VOUT_BOOLEANS_PER_PAGE;
+ max_labels += data->pages;
+ }
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_IOUT)) {
+ max_sensors += data->pages * PMBUS_IOUT_SENSORS_PER_PAGE;
+ max_booleans += data->pages * PMBUS_IOUT_BOOLEANS_PER_PAGE;
+ max_labels += data->pages;
+ }
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_POUT)) {
+ max_sensors += data->pages * PMBUS_POUT_SENSORS_PER_PAGE;
+ max_booleans += data->pages * PMBUS_POUT_BOOLEANS_PER_PAGE;
+ max_labels += data->pages;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pmbus_temp_sensors); i++) {
+ if (!pmbus_check_word_register(client, 0,
+ pmbus_temp_sensors[i]))
+ break;
+ 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)
+{
+ int i, i0, i1, in_index;
+
+ /*
+ * Input voltage sensors
+ */
+ in_index = 1;
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_VIN)) {
+ 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, 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, false);
+ if (data->status_bits & PB_HAVE_STATUS_INPUT)
+ pmbus_add_boolean_reg(data, "in", "min_alarm",
+ in_index,
+ PB_STATUS_INPUT_BASE,
+ PB_VOLTAGE_UV_WARNING);
+ }
+ 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, false);
+ if (data->status_bits & PB_HAVE_STATUS_INPUT)
+ pmbus_add_boolean_reg(data, "in", "lcrit_alarm",
+ in_index,
+ PB_STATUS_INPUT_BASE,
+ PB_VOLTAGE_UV_FAULT);
+ }
+ 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, false);
+ if (data->status_bits & PB_HAVE_STATUS_INPUT)
+ pmbus_add_boolean_reg(data, "in", "max_alarm",
+ in_index,
+ PB_STATUS_INPUT_BASE,
+ PB_VOLTAGE_OV_WARNING);
+ }
+ 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, false);
+ if (data->status_bits & PB_HAVE_STATUS_INPUT)
+ pmbus_add_boolean_reg(data, "in", "crit_alarm",
+ in_index,
+ PB_STATUS_INPUT_BASE,
+ PB_VOLTAGE_OV_FAULT);
+ }
+ in_index++;
+ }
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_VCAP)) {
+ pmbus_add_label(data, "in", in_index, "vcap", 0);
+ pmbus_add_sensor(data, "in", "input", in_index, 0,
+ PMBUS_READ_VCAP, PSC_VOLTAGE, true);
+ in_index++;
+ }
+
+ /*
+ * Output voltage sensors
+ */
+ for (i = 0; i < data->pages; i++) {
+ if (!pmbus_check_word_register(client, i, PMBUS_READ_VOUT))
+ break;
+
+ i0 = data->num_sensors;
+ pmbus_add_label(data, "in", in_index, "vout", i+1);
+ pmbus_add_sensor(data, "in", "input", in_index, i,
+ PMBUS_READ_VOUT, PSC_VOLTAGE, true);
+ if (pmbus_check_word_register(client, i,
+ PMBUS_VOUT_UV_WARN_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "in", "min", in_index, i,
+ PMBUS_VOUT_UV_WARN_LIMIT, PSC_VOLTAGE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_VOUT)
+ pmbus_add_boolean_reg(data, "in", "min_alarm",
+ in_index,
+ PB_STATUS_VOUT_BASE + i,
+ PB_VOLTAGE_UV_WARNING);
+ }
+ if (pmbus_check_word_register(client, i,
+ PMBUS_VOUT_UV_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "in", "lcrit", in_index, i,
+ PMBUS_VOUT_UV_FAULT_LIMIT, PSC_VOLTAGE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_VOUT)
+ pmbus_add_boolean_reg(data, "in", "lcrit_alarm",
+ in_index,
+ PB_STATUS_VOUT_BASE + i,
+ PB_VOLTAGE_UV_FAULT);
+ }
+ if (pmbus_check_word_register(client, i,
+ PMBUS_VOUT_OV_WARN_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "in", "max", in_index, i,
+ PMBUS_VOUT_OV_WARN_LIMIT, PSC_VOLTAGE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_VOUT) {
+ pmbus_add_boolean_reg(data, "in", "max_alarm",
+ in_index,
+ PB_STATUS_VOUT_BASE + i,
+ PB_VOLTAGE_OV_WARNING);
+ }
+ }
+ if (pmbus_check_word_register(client, i,
+ PMBUS_VOUT_OV_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "in", "crit", in_index, i,
+ PMBUS_VOUT_OV_FAULT_LIMIT, PSC_VOLTAGE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_VOUT)
+ pmbus_add_boolean_reg(data, "in", "crit_alarm",
+ in_index,
+ PB_STATUS_VOUT_BASE + i,
+ PB_VOLTAGE_OV_FAULT);
+ }
+ in_index++;
+ }
+
+ /*
+ * Current sensors
+ */
+
+ /*
+ * Input current sensors
+ */
+ in_index = 1;
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_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, 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, false);
+ if (data->status_bits & PB_HAVE_STATUS_INPUT) {
+ pmbus_add_boolean_reg(data, "curr", "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, false);
+ if (data->status_bits & PB_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 (i = 0; i < data->pages; i++) {
+ if (!pmbus_check_word_register(client, i, PMBUS_READ_IOUT))
+ break;
+
+ i0 = data->num_sensors;
+ pmbus_add_label(data, "curr", in_index, "iout", i+1);
+ pmbus_add_sensor(data, "curr", "input", in_index, i,
+ PMBUS_READ_IOUT, PSC_CURRENT, true);
+ if (pmbus_check_word_register(client, i,
+ PMBUS_IOUT_OC_WARN_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "curr", "max", in_index, i,
+ PMBUS_IOUT_OC_WARN_LIMIT, PSC_CURRENT,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_IOUT)
+ pmbus_add_boolean_reg(data, "curr", "alarm",
+ in_index,
+ PB_STATUS_IOUT_BASE + i,
+ PB_IOUT_OC_WARNING);
+ }
+ if (pmbus_check_word_register(client, i,
+ PMBUS_IOUT_UC_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "curr", "lcrit", in_index, i,
+ PMBUS_IOUT_UC_FAULT_LIMIT, PSC_CURRENT,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_IOUT)
+ pmbus_add_boolean_reg(data, "curr",
+ "lcrit_alarm",
+ in_index,
+ PB_STATUS_IOUT_BASE + i,
+ PB_IOUT_UC_FAULT);
+ }
+ if (pmbus_check_word_register(client, i,
+ PMBUS_IOUT_OC_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "curr", "crit", in_index, i,
+ PMBUS_IOUT_OC_FAULT_LIMIT, PSC_CURRENT,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_IOUT)
+ pmbus_add_boolean_reg(data, "curr",
+ "crit_alarm",
+ in_index,
+ PB_STATUS_IOUT_BASE + i,
+ PB_IOUT_OC_FAULT);
+ }
+ in_index++;
+ }
+
+ /*
+ * Power sensors
+ */
+ /*
+ * Input Power sensors
+ */
+ in_index = 1;
+ if (pmbus_check_word_register(client, 0, PMBUS_READ_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);
+ 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);
+ if (data->status_bits & PB_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 (i = 0; i < data->pages; i++) {
+ bool need_alarm = false;
+
+ if (!pmbus_check_word_register(client, i, PMBUS_READ_POUT))
+ break;
+
+ i0 = data->num_sensors;
+ pmbus_add_label(data, "power", in_index, "pout", i+1);
+ pmbus_add_sensor(data, "power", "input", in_index, i,
+ PMBUS_READ_POUT, PSC_POWER, 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, i, PMBUS_POUT_MAX)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "power", "cap", in_index, i,
+ PMBUS_POUT_MAX, PSC_POWER, false);
+ need_alarm = true;
+ }
+ if (pmbus_check_word_register(client, i,
+ PMBUS_POUT_OP_WARN_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "power", "max", in_index, i,
+ PMBUS_POUT_OP_WARN_LIMIT, PSC_POWER,
+ false);
+ need_alarm = true;
+ }
+ if (need_alarm && (data->status_bits & PB_HAVE_STATUS_IOUT))
+ pmbus_add_boolean_reg(data, "power", "alarm",
+ in_index,
+ PB_STATUS_IOUT_BASE,
+ PB_POUT_OP_WARNING
+ | PB_POWER_LIMITING);
+
+ if (pmbus_check_word_register(client, i,
+ PMBUS_POUT_OP_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "power", "crit", in_index, i,
+ PMBUS_POUT_OP_FAULT_LIMIT, PSC_POWER,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_IOUT)
+ pmbus_add_boolean_reg(data, "power",
+ "crit_alarm",
+ in_index,
+ PB_STATUS_IOUT_BASE,
+ PB_POUT_OP_FAULT);
+ }
+ in_index++;
+ }
+
+ /*
+ * Temperature sensors
+ */
+ in_index = 1;
+ for (i = 0; i < ARRAY_SIZE(pmbus_temp_sensors); i++) {
+ if (!pmbus_check_word_register(client, 0,
+ pmbus_temp_sensors[i]))
+ break;
+
+ i0 = data->num_sensors;
+ pmbus_add_sensor(data, "temp", "input", in_index, 0,
+ pmbus_temp_sensors[i], PSC_TEMPERATURE, true);
+
+ /*
+ * PMBus provides only one status register for all temperature
+ * sensors. Thus, we can not use the status register to
+ * determine which of the sensors actually caused an alarm.
+ * Always compare current temperature against the limit
+ * registers to determine alarm conditions for a specific
+ * sensor.
+ */
+ if (pmbus_check_word_register(client, 0, PMBUS_UT_WARN_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "temp", "min", in_index, 0,
+ PMBUS_UT_WARN_LIMIT, PSC_TEMPERATURE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_TEMP)
+ pmbus_add_boolean_cmp(data, "temp", "min_alarm",
+ in_index, i1, i0,
+ PB_STATUS_TEMP_BASE,
+ PB_TEMP_UT_WARNING);
+ }
+ if (pmbus_check_word_register(client, 0,
+ PMBUS_UT_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "temp", "lcrit", in_index, 0,
+ PMBUS_UT_FAULT_LIMIT, PSC_TEMPERATURE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_TEMP)
+ pmbus_add_boolean_cmp(data, "temp", "lcrit",
+ in_index, i1, i0,
+ PB_STATUS_TEMP_BASE,
+ PB_TEMP_UT_FAULT);
+ }
+ if (pmbus_check_word_register(client, 0, PMBUS_OT_WARN_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "temp", "max", in_index, 0,
+ PMBUS_OT_WARN_LIMIT, PSC_TEMPERATURE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_TEMP)
+ pmbus_add_boolean_cmp(data, "temp", "max_alarm",
+ in_index, i0, i1,
+ PB_STATUS_TEMP_BASE,
+ PB_TEMP_OT_WARNING);
+ }
+ if (pmbus_check_word_register(client, 0,
+ PMBUS_OT_FAULT_LIMIT)) {
+ i1 = data->num_sensors;
+ pmbus_add_sensor(data, "temp", "crit", in_index, 0,
+ PMBUS_OT_FAULT_LIMIT, PSC_TEMPERATURE,
+ false);
+ if (data->status_bits & PB_HAVE_STATUS_TEMP)
+ pmbus_add_boolean_cmp(data, "temp",
+ "crit_alarm",
+ in_index, i0, i1,
+ PB_STATUS_TEMP_BASE,
+ PB_TEMP_OT_FAULT);
+ }
+ in_index++;
+ }
+
+ pmbus_clear_faults(client);
+}
+
+static int pmbus_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pmbus_data *data;
+ int i, ret;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA
+ | I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ data->type = id->driver_data;
+ data->direct = pmbus_config[data->type].direct;
+ data->pages = pmbus_config[data->type].pages;
+
+ /*
+ * Bail out if status register or PMBus revision register
+ * does not exist.
+ */
+ if (!pmbus_check_byte_register(client, 0, PMBUS_STATUS_BYTE)
+ || !pmbus_check_byte_register(client, 0, PMBUS_REVISION)) {
+ ret = -ENODEV;
+ goto out_data;
+ }
+
+ if (data->type == pmbus) {
+ pmbus_identify_generic(client, data);
+ } else {
+ /*
+ * 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 (data->pages > 1 && pmbus_set_page(client,
+ data->pages-1) < 0) {
+ dev_err(&client->dev, "Failed to select page %d",
+ data->pages-1);
+ ret = -EINVAL;
+ goto out_data;
+ }
+ if (data->direct)
+ for (i = 0; i < PSC_NUM_CLASSES; i++) {
+ data->m[i] = pmbus_config[data->type].m[i];
+ data->b[i] = pmbus_config[data->type].b[i];
+ data->R[i] = pmbus_config[data->type].R[i];
+ }
+ }
+
+ /*
+ * Identify supported status registers
+ */
+ if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_VOUT))
+ data->status_bits |= PB_HAVE_STATUS_VOUT;
+ if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_IOUT))
+ data->status_bits |= PB_HAVE_STATUS_IOUT;
+ if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_INPUT))
+ data->status_bits |= PB_HAVE_STATUS_INPUT;
+ if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_TEMPERATURE))
+ data->status_bits |= PB_HAVE_STATUS_TEMP;
+
+ /* Determine maximum number of sensors, booleans, and labels */
+ pmbus_find_max_attr(client, data);
+
+ ret = -ENOMEM;
+ data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors,
+ GFP_KERNEL);
+ if (!data->sensors)
+ goto out_data;
+
+ data->booleans = kzalloc(sizeof(struct pmbus_boolean)
+ * data->max_booleans, GFP_KERNEL);
+ if (!data->booleans)
+ goto out_sensors;
+
+ data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels,
+ GFP_KERNEL);
+ if (!data->labels)
+ goto out_booleans;
+
+ data->attributes = kzalloc(sizeof(struct attribute *)
+ * data->max_attributes, GFP_KERNEL);
+ if (!data->attributes)
+ 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) {
+ ret = -ENODEV;
+ goto out_attributes;
+ }
+
+ /* Register sysfs hooks */
+ data->group.attrs = data->attributes;
+ ret = sysfs_create_group(&client->dev.kobj, &data->group);
+ if (ret)
+ goto out_attributes;
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ ret = PTR_ERR(data->hwmon_dev);
+ 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);
+out:
+ return ret;
+}
+
+static int pmbus_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;
+}
+
+static const struct i2c_device_id pmbus_id[] = {
+ {"bmr45x", pmbus},
+ {"ltc2978", ltc2978},
+ {"max16064", max16064},
+ {"max8688", max8688},
+ {"pmbus", pmbus},
+ {"ucd921x", pmbus},
+ {"ucd9220", ucd9220},
+ {"ucd9240", ucd9240},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, pmbus_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver pmbus_driver = {
+ .driver = {
+ .name = "pmbus",
+ },
+ .probe = pmbus_probe,
+ .remove = pmbus_remove,
+ .id_table = pmbus_id,
+};
+
+static int __init pmbus_init(void)
+{
+ return i2c_add_driver(&pmbus_driver);
+}
+
+static void __exit pmbus_exit(void)
+{
+ i2c_del_driver(&pmbus_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck");
+MODULE_DESCRIPTION("PMBus driver");
+MODULE_LICENSE("GPL");
+module_init(pmbus_init);
+module_exit(pmbus_exit);
diff --git a/drivers/hwmon/pmbus.h b/drivers/hwmon/pmbus.h
new file mode 100644
index 0000000..2a8a027
--- /dev/null
+++ b/drivers/hwmon/pmbus.h
@@ -0,0 +1,209 @@
+/*
+ * pmbus.h - Common defines and structures for PMBus devices
+ *
+ * Copyright (c) 2010 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.
+ */
+
+#ifndef PMBUS_H
+#define PMBUS_H
+
+/*
+ * Registers
+ */
+#define PMBUS_PAGE 0x00
+#define PMBUS_OPERATION 0x01
+#define PMBUS_ON_OFF_CONFIG 0x02
+#define PMBUS_CLEAR_FAULTS 0x03
+#define PMBUS_PHASE 0x04
+
+#define PMBUS_CAPABILITY 0x19
+#define PMBUS_QUERY 0x1A
+
+#define PMBUS_VOUT_MODE 0x20
+#define PMBUS_VOUT_COMMAND 0x21
+#define PMBUS_VOUT_TRIM 0x22
+#define PMBUS_VOUT_CAL_OFFSET 0x23
+#define PMBUS_VOUT_MAX 0x24
+#define PMBUS_VOUT_MARGIN_HIGH 0x25
+#define PMBUS_VOUT_MARGIN_LOW 0x26
+#define PMBUS_VOUT_TRANSITION_RATE 0x27
+#define PMBUS_VOUT_DROOP 0x28
+#define PMBUS_VOUT_SCALE_LOOP 0x29
+#define PMBUS_VOUT_SCALE_MONITOR 0x2A
+
+#define PMBUS_COEFFICIENTS 0x30
+#define PMBUS_POUT_MAX 0x31
+
+#define PMBUS_VOUT_OV_FAULT_LIMIT 0x40
+#define PMBUS_VOUT_OV_FAULT_RESPONSE 0x41
+#define PMBUS_VOUT_OV_WARN_LIMIT 0x42
+#define PMBUS_VOUT_UV_WARN_LIMIT 0x43
+#define PMBUS_VOUT_UV_FAULT_LIMIT 0x44
+#define PMBUS_VOUT_UV_FAULT_RESPONSE 0x45
+#define PMBUS_IOUT_OC_FAULT_LIMIT 0x46
+#define PMBUS_IOUT_OC_FAULT_RESPONSE 0x47
+#define PMBUS_IOUT_OC_LV_FAULT_LIMIT 0x48
+#define PMBUS_IOUT_OC_LV_FAULT_RESPONSE 0x49
+#define PMBUS_IOUT_OC_WARN_LIMIT 0x4A
+#define PMBUS_IOUT_UC_FAULT_LIMIT 0x4B
+#define PMBUS_IOUT_UC_FAULT_RESPONSE 0x4C
+
+#define PMBUS_OT_FAULT_LIMIT 0x4F
+#define PMBUS_OT_FAULT_RESPONSE 0x50
+#define PMBUS_OT_WARN_LIMIT 0x51
+#define PMBUS_UT_WARN_LIMIT 0x52
+#define PMBUS_UT_FAULT_LIMIT 0x53
+#define PMBUS_UT_FAULT_RESPONSE 0x54
+#define PMBUS_VIN_OV_FAULT_LIMIT 0x55
+#define PMBUS_VIN_OV_FAULT_RESPONSE 0x56
+#define PMBUS_VIN_OV_WARN_LIMIT 0x57
+#define PMBUS_VIN_UV_WARN_LIMIT 0x58
+#define PMBUS_VIN_UV_FAULT_LIMIT 0x59
+
+#define PMBUS_IIN_OC_FAULT_LIMIT 0x5B
+#define PMBUS_IIN_OC_WARN_LIMIT 0x5D
+
+#define PMBUS_POUT_OP_FAULT_LIMIT 0x68
+#define PMBUS_POUT_OP_WARN_LIMIT 0x6A
+#define PMBUS_PIN_OP_WARN_LIMIT 0x6B
+
+#define PMBUS_STATUS_BYTE 0x78
+#define PMBUS_STATUS_WORD 0x79
+#define PMBUS_STATUS_VOUT 0x7A
+#define PMBUS_STATUS_IOUT 0x7B
+#define PMBUS_STATUS_INPUT 0x7C
+#define PMBUS_STATUS_TEMPERATURE 0x7D
+#define PMBUS_STATUS_CML 0x7E
+#define PMBUS_STATUS_OTHER 0x7F
+#define PMBUS_STATUS_MFR_SPECIFIC 0x80
+#define PMBUS_STATUS_FANS_1_2 0x81
+#define PMBUS_STATUS_FANS_3_4 0x82
+
+#define PMBUS_READ_VIN 0x88
+#define PMBUS_READ_IIN 0x89
+#define PMBUS_READ_VCAP 0x8A
+#define PMBUS_READ_VOUT 0x8B
+#define PMBUS_READ_IOUT 0x8C
+#define PMBUS_READ_TEMPERATURE_1 0x8D
+#define PMBUS_READ_TEMPERATURE_2 0x8E
+#define PMBUS_READ_TEMPERATURE_3 0x8F
+#define PMBUS_READ_FAN_SPEED_1 0x90
+#define PMBUS_READ_FAN_SPEED_2 0x91
+#define PMBUS_READ_FAN_SPEED_3 0x92
+#define PMBUS_READ_FAN_SPEED_4 0x93
+#define PMBUS_READ_DUTY_CYCLE 0x94
+#define PMBUS_READ_FREQUENCY 0x95
+#define PMBUS_READ_POUT 0x96
+#define PMBUS_READ_PIN 0x97
+
+#define PMBUS_REVISION 0x98
+#define PMBUS_MFR_ID 0x99
+#define PMBUS_MFR_MODEL 0x9A
+#define PMBUS_MFR_REVISION 0x9B
+#define PMBUS_MFR_LOCATION 0x9C
+#define PMBUS_MFR_DATE 0x9D
+#define PMBUS_MFR_SERIAL 0x9E
+
+#define LTC2978_MFR_SPECIAL_ID 0xE7
+
+/*
+ * CAPABILITY
+ */
+#define PB_CAPABILITY_SMBALERT (1<<4)
+#define PB_CAPABILITY_ERROR_CHECK (1<<7)
+
+/*
+ * VOUT_MODE
+ */
+#define PB_VOUT_MODE_MODE_MASK 0xe0
+#define PB_VOUT_MODE_PARAM_MASK 0x1f
+
+#define PB_VOUT_MODE_LINEAR 0x00
+#define PB_VOUT_MODE_VID 0x20
+#define PB_VOUT_MODE_DIRECT 0x40
+
+/*
+ * STATUS_BYTE, STATUS_WORD (lower)
+ */
+#define PB_STATUS_NONE_ABOVE (1<<0)
+#define PB_STATUS_CML (1<<1)
+#define PB_STATUS_TEMPERATURE (1<<2)
+#define PB_STATUS_VIN_UV (1<<3)
+#define PB_STATUS_IOUT_OC (1<<4)
+#define PB_STATUS_VOUT_OV (1<<5)
+#define PB_STATUS_OFF (1<<6)
+#define PB_STATUS_BUSY (1<<7)
+
+/*
+ * STATUS_WORD (upper)
+ */
+#define PB_STATUS_UNKNOWN (1<<8)
+#define PB_STATUS_OTHER (1<<9)
+#define PB_STATUS_FANS (1<<10)
+#define PB_STATUS_POWER_GOOD_N (1<<11)
+#define PB_STATUS_WORD_MFR (1<<12)
+#define PB_STATUS_INPUT (1<<13)
+#define PB_STATUS_IOUT_POUT (1<<14)
+#define PB_STATUS_VOUT (1<<15)
+
+/*
+ * STATUS_IOUT
+ */
+#define PB_POUT_OP_WARNING (1<<0)
+#define PB_POUT_OP_FAULT (1<<1)
+#define PB_POWER_LIMITING (1<<2)
+#define PB_CURRENT_SHARE_FAULT (1<<3)
+#define PB_IOUT_UC_FAULT (1<<4)
+#define PB_IOUT_OC_WARNING (1<<5)
+#define PB_IOUT_OC_LV_FAULT (1<<6)
+#define PB_IOUT_OC_FAULT (1<<7)
+
+/*
+ * STATUS_VOUT, STATUS_INPUT
+ */
+#define PB_VOLTAGE_UV_FAULT (1<<4)
+#define PB_VOLTAGE_UV_WARNING (1<<5)
+#define PB_VOLTAGE_OV_WARNING (1<<6)
+#define PB_VOLTAGE_OV_FAULT (1<<7)
+
+/*
+ * STATUS_INPUT
+ */
+#define PB_PIN_OP_WARNING (1<<0)
+#define PB_IIN_OC_WARNING (1<<1)
+#define PB_IIN_OC_FAULT (1<<2)
+
+/*
+ * STATUS_TEMPERATURE
+ */
+#define PB_TEMP_UT_FAULT (1<<4)
+#define PB_TEMP_UT_WARNING (1<<5)
+#define PB_TEMP_OT_WARNING (1<<6)
+#define PB_TEMP_OT_FAULT (1<<7)
+
+/*
+ * CML_FAULT_STATUS
+ */
+#define PB_CML_FAULT_OTHER_MEM_LOGIC (1<<0)
+#define PB_CML_FAULT_OTHER_COMM (1<<1)
+#define PB_CML_FAULT_PROCESSOR (1<<3)
+#define PB_CML_FAULT_MEMORY (1<<4)
+#define PB_CML_FAULT_PACKET_ERROR (1<<5)
+#define PB_CML_FAULT_INVALID_DATA (1<<6)
+#define PB_CML_FAULT_INVALID_COMMAND (1<<7)
+
+#endif /* PB_H */
--
1.7.0.87.g0901d

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