--- /dev/null
+/*
+ * lm87.c
+ *
+ * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl>
+ * Philip Edelbrock <phil@netroedge.com>
+ * Stephen Rousset <stephen.rousset@rocketlogix.com>
+ * Dan Eaton <dan.eaton@rocketlogix.com>
+ * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de>
+ *
+ * Original port to Linux 2.6 by Jeff Oliver.
+ *
+ * The LM87 is a sensor chip made by National Semiconductor. It monitors up
+ * to 8 voltages (including its own power source), up to three temperatures
+ * (its own plus up to two external ones) and up to two fans. The default
+ * configuration is 6 voltages, two temperatures and two fans (see below).
+ * Voltages are scaled internally with ratios such that the nominal value of
+ * each voltage correspond to a register value of 192 (which means a
+ * resolution of about 0.5% of the nominal value). Temperature values are
+ * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
+ * datasheet can be obtained from National's website at:
+ * http://www.national.com/pf/LM/LM87.html
+ *
+ * Some functions share pins, so not all functions are available at the same
+ * time. Which are depends on the hardware setup. This driver normally
+ * assumes that firmware configured the chip correctly. Where this is not
+ * the case, platform code must set the I2C client's platform_data to point
+ * to a u8 value to be written to the channel register.
+ * For reference, here is the list of exclusive functions:
+ * - in0+in5 (default) or temp3
+ * - fan1 (default) or in6
+ * - fan2 (default) or in7
+ * - VID lines (default) or IRQ lines (not handled by this driver)
+ *
+ * The LM87 additionally features an analog output, supposedly usable to
+ * control the speed of a fan. All new chips use pulse width modulation
+ * instead. The LM87 is the only hardware monitoring chipset I know of
+ * which uses amplitude modulation. Be careful when using this feature.
+ *
+ * This driver also supports the ADM1024, a sensor chip made by Analog
+ * Devices. That chip is fully compatible with the LM87. Complete
+ * datasheet can be obtained from Analog's website at:
+ * http://www.analog.com/en/prod/0,2877,ADM1024,00.html
+ *
+ * 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>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+/*
+ * Addresses to scan
+ * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
+ */
+
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
+
+enum chips { lm87, adm1024 };
+
+/*
+ * The LM87 registers
+ */
+
+/* nr in 0..5 */
+#define LM87_REG_IN(nr) (0x20 + (nr))
+#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
+#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
+/* nr in 0..1 */
+#define LM87_REG_AIN(nr) (0x28 + (nr))
+#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
+#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
+
+static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
+static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
+static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
+
+#define LM87_REG_TEMP_HW_INT_LOCK 0x13
+#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
+#define LM87_REG_TEMP_HW_INT 0x17
+#define LM87_REG_TEMP_HW_EXT 0x18
+
+/* nr in 0..1 */
+#define LM87_REG_FAN(nr) (0x28 + (nr))
+#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
+#define LM87_REG_AOUT 0x19
+
+#define LM87_REG_CONFIG 0x40
+#define LM87_REG_CHANNEL_MODE 0x16
+#define LM87_REG_VID_FAN_DIV 0x47
+#define LM87_REG_VID4 0x49
+
+#define LM87_REG_ALARMS1 0x41
+#define LM87_REG_ALARMS2 0x42
+
+#define LM87_REG_COMPANY_ID 0x3E
+#define LM87_REG_REVISION 0x3F
+
+/*
+ * Conversions and various macros
+ * The LM87 uses signed 8-bit values for temperatures.
+ */
+
+#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
+#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
+ (val) * 192 >= (scale) * 255 ? 255 : \
+ ((val) * 192 + (scale) / 2) / (scale))
+
+#define TEMP_FROM_REG(reg) ((reg) * 1000)
+#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
+ (val) >= 126500 ? 127 : \
+ (((val) < 0 ? (val) - 500 : \
+ (val) + 500) / 1000))
+
+#define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \
+ (1350000 + (reg)*(div) / 2) / ((reg) * (div)))
+#define FAN_TO_REG(val, div) ((val) * (div) * 255 <= 1350000 ? 255 : \
+ (1350000 + (val)*(div) / 2) / ((val) * (div)))
+
+#define FAN_DIV_FROM_REG(reg) (1 << (reg))
+
+/* analog out is 9.80mV/LSB */
+#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
+#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
+ (val) >= 2500 ? 255 : \
+ ((val) * 10 + 49) / 98)
+
+/* nr in 0..1 */
+#define CHAN_NO_FAN(nr) (1 << (nr))
+#define CHAN_TEMP3 (1 << 2)
+#define CHAN_VCC_5V (1 << 3)
+#define CHAN_NO_VID (1 << 7)
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct lm87_data {
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ u8 channel; /* register value */
+ u8 config; /* original register value */
+
+ u8 in[8]; /* register value */
+ u8 in_max[8]; /* register value */
+ u8 in_min[8]; /* register value */
+ u16 in_scale[8];
+
+ s8 temp[3]; /* register value */
+ s8 temp_high[3]; /* register value */
+ s8 temp_low[3]; /* register value */
+ s8 temp_crit_int; /* min of two register values */
+ s8 temp_crit_ext; /* min of two register values */
+
+ u8 fan[2]; /* register value */
+ u8 fan_min[2]; /* register value */
+ u8 fan_div[2]; /* register value, shifted right */
+ u8 aout; /* register value */
+
+ u16 alarms; /* register values, combined */
+ u8 vid; /* register values, combined */
+ u8 vrm;
+};
+
+static inline int lm87_read_value(struct i2c_client *client, u8 reg)
+{
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static struct lm87_data *lm87_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ int i, j;
+
+ dev_dbg(&client->dev, "Updating data.\n");
+
+ i = (data->channel & CHAN_TEMP3) ? 1 : 0;
+ j = (data->channel & CHAN_TEMP3) ? 5 : 6;
+ for (; i < j; i++) {
+ data->in[i] = lm87_read_value(client,
+ LM87_REG_IN(i));
+ data->in_min[i] = lm87_read_value(client,
+ LM87_REG_IN_MIN(i));
+ data->in_max[i] = lm87_read_value(client,
+ LM87_REG_IN_MAX(i));
+ }
+
+ for (i = 0; i < 2; i++) {
+ if (data->channel & CHAN_NO_FAN(i)) {
+ data->in[6+i] = lm87_read_value(client,
+ LM87_REG_AIN(i));
+ data->in_max[6+i] = lm87_read_value(client,
+ LM87_REG_AIN_MAX(i));
+ data->in_min[6+i] = lm87_read_value(client,
+ LM87_REG_AIN_MIN(i));
+
+ } else {
+ data->fan[i] = lm87_read_value(client,
+ LM87_REG_FAN(i));
+ data->fan_min[i] = lm87_read_value(client,
+ LM87_REG_FAN_MIN(i));
+ }
+ }
+
+ j = (data->channel & CHAN_TEMP3) ? 3 : 2;
+ for (i = 0 ; i < j; i++) {
+ data->temp[i] = lm87_read_value(client,
+ LM87_REG_TEMP[i]);
+ data->temp_high[i] = lm87_read_value(client,
+ LM87_REG_TEMP_HIGH[i]);
+ data->temp_low[i] = lm87_read_value(client,
+ LM87_REG_TEMP_LOW[i]);
+ }
+
+ i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
+ j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
+ data->temp_crit_int = min(i, j);
+
+ i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
+ j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
+ data->temp_crit_ext = min(i, j);
+
+ i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
+ data->fan_div[0] = (i >> 4) & 0x03;
+ data->fan_div[1] = (i >> 6) & 0x03;
+ data->vid = (i & 0x0F)
+ | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
+ << 4;
+
+ data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
+ | (lm87_read_value(client, LM87_REG_ALARMS2)
+ << 8);
+ data->aout = lm87_read_value(client, LM87_REG_AOUT);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+/*
+ * Sysfs stuff
+ */
+
+static ssize_t show_in_input(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr],
+ data->in_scale[nr]));
+}
+
+static ssize_t show_in_min(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr],
+ data->in_scale[nr]));
+}
+
+static ssize_t show_in_max(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr],
+ data->in_scale[nr]));
+}
+
+static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
+ lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) :
+ LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
+ lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) :
+ LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+#define set_in(offset) \
+static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
+ show_in_input, NULL, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
+ show_in_min, set_in_min, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
+ show_in_max, set_in_max, offset)
+set_in(0);
+set_in(1);
+set_in(2);
+set_in(3);
+set_in(4);
+set_in(5);
+set_in(6);
+set_in(7);
+
+static ssize_t show_temp_input(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
+}
+
+static ssize_t show_temp_low(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%d\n",
+ TEMP_FROM_REG(data->temp_low[nr]));
+}
+
+static ssize_t show_temp_high(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%d\n",
+ TEMP_FROM_REG(data->temp_high[nr]));
+}
+
+static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp_low[nr] = TEMP_TO_REG(val);
+ lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp_high[nr] = TEMP_TO_REG(val);
+ lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+#define set_temp(offset) \
+static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
+ show_temp_input, NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
+ show_temp_high, set_temp_high, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
+ show_temp_low, set_temp_low, offset - 1)
+set_temp(1);
+set_temp(2);
+set_temp(3);
+
+static ssize_t show_temp_crit_int(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
+}
+
+static ssize_t show_temp_crit_ext(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
+}
+
+static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
+static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
+static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
+
+static ssize_t show_fan_input(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
+ FAN_DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t show_fan_min(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+ FAN_DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t show_fan_div(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int nr = to_sensor_dev_attr(attr)->index;
+
+ return sprintf(buf, "%d\n",
+ FAN_DIV_FROM_REG(data->fan_div[nr]));
+}
+
+static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->fan_min[nr] = FAN_TO_REG(val,
+ FAN_DIV_FROM_REG(data->fan_div[nr]));
+ lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+/*
+ * Note: we save and restore the fan minimum here, because its value is
+ * determined in part by the fan clock divider. This follows the principle
+ * of least surprise; the user doesn't expect the fan minimum to change just
+ * because the divider changed.
+ */
+static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ long val;
+ int err;
+ unsigned long min;
+ u8 reg;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ min = FAN_FROM_REG(data->fan_min[nr],
+ FAN_DIV_FROM_REG(data->fan_div[nr]));
+
+ switch (val) {
+ case 1:
+ data->fan_div[nr] = 0;
+ break;
+ case 2:
+ data->fan_div[nr] = 1;
+ break;
+ case 4:
+ data->fan_div[nr] = 2;
+ break;
+ case 8:
+ data->fan_div[nr] = 3;
+ break;
+ default:
+ mutex_unlock(&data->update_lock);
+ return -EINVAL;
+ }
+
+ reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
+ switch (nr) {
+ case 0:
+ reg = (reg & 0xCF) | (data->fan_div[0] << 4);
+ break;
+ case 1:
+ reg = (reg & 0x3F) | (data->fan_div[1] << 6);
+ break;
+ }
+ lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
+
+ data->fan_min[nr] = FAN_TO_REG(min, val);
+ lm87_write_value(client, LM87_REG_FAN_MIN(nr),
+ data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+#define set_fan(offset) \
+static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
+ show_fan_input, NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
+ show_fan_min, set_fan_min, offset - 1); \
+static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
+ show_fan_div, set_fan_div, offset - 1)
+set_fan(1);
+set_fan(2);
+
+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ return sprintf(buf, "%d\n", data->alarms);
+}
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+
+static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm87_data *data = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n", data->vrm);
+}
+static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct lm87_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (val > 255)
+ return -EINVAL;
+
+ data->vrm = val;
+ return count;
+}
+static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
+
+static ssize_t show_aout(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
+}
+static ssize_t set_aout(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm87_data *data = i2c_get_clientdata(client);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->aout = AOUT_TO_REG(val);
+ lm87_write_value(client, LM87_REG_AOUT, data->aout);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm87_data *data = lm87_update_device(dev);
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
+}
+static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
+static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
+static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
+static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
+
+/*
+ * Real code
+ */
+
+static struct attribute *lm87_attributes[] = {
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in3_alarm.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in4_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &dev_attr_temp1_crit.attr,
+ &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &dev_attr_temp2_crit.attr,
+ &sensor_dev_attr_temp2_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+
+ &dev_attr_alarms.attr,
+ &dev_attr_aout_output.attr,
+
+ NULL
+};
+
+static const struct attribute_group lm87_group = {
+ .attrs = lm87_attributes,
+};
+
+static struct attribute *lm87_attributes_in6[] = {
+ &sensor_dev_attr_in6_input.dev_attr.attr,
+ &sensor_dev_attr_in6_min.dev_attr.attr,
+ &sensor_dev_attr_in6_max.dev_attr.attr,
+ &sensor_dev_attr_in6_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_in6 = {
+ .attrs = lm87_attributes_in6,
+};
+
+static struct attribute *lm87_attributes_fan1[] = {
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_fan1 = {
+ .attrs = lm87_attributes_fan1,
+};
+
+static struct attribute *lm87_attributes_in7[] = {
+ &sensor_dev_attr_in7_input.dev_attr.attr,
+ &sensor_dev_attr_in7_min.dev_attr.attr,
+ &sensor_dev_attr_in7_max.dev_attr.attr,
+ &sensor_dev_attr_in7_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_in7 = {
+ .attrs = lm87_attributes_in7,
+};
+
+static struct attribute *lm87_attributes_fan2[] = {
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_fan2 = {
+ .attrs = lm87_attributes_fan2,
+};
+
+static struct attribute *lm87_attributes_temp3[] = {
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_min.dev_attr.attr,
+ &dev_attr_temp3_crit.attr,
+ &sensor_dev_attr_temp3_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_fault.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_temp3 = {
+ .attrs = lm87_attributes_temp3,
+};
+
+static struct attribute *lm87_attributes_in0_5[] = {
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_min.dev_attr.attr,
+ &sensor_dev_attr_in0_max.dev_attr.attr,
+ &sensor_dev_attr_in0_alarm.dev_attr.attr,
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in5_min.dev_attr.attr,
+ &sensor_dev_attr_in5_max.dev_attr.attr,
+ &sensor_dev_attr_in5_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_in0_5 = {
+ .attrs = lm87_attributes_in0_5,
+};
+
+static struct attribute *lm87_attributes_vid[] = {
+ &dev_attr_cpu0_vid.attr,
+ &dev_attr_vrm.attr,
+ NULL
+};
+
+static const struct attribute_group lm87_group_vid = {
+ .attrs = lm87_attributes_vid,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ const char *name;
+ u8 cid, rev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80)
+ return -ENODEV;
+
+ /* Now, we do the remaining detection. */
+ cid = lm87_read_value(client, LM87_REG_COMPANY_ID);
+ rev = lm87_read_value(client, LM87_REG_REVISION);
+
+ if (cid == 0x02 /* National Semiconductor */
+ && (rev >= 0x01 && rev <= 0x08))
+ name = "lm87";
+ else if (cid == 0x41 /* Analog Devices */
+ && (rev & 0xf0) == 0x10)
+ name = "adm1024";
+ else {
+ dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
+ client->addr);
+ return -ENODEV;
+ }
+
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static void lm87_remove_files(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+
+ sysfs_remove_group(&dev->kobj, &lm87_group);
+ sysfs_remove_group(&dev->kobj, &lm87_group_in6);
+ sysfs_remove_group(&dev->kobj, &lm87_group_fan1);
+ sysfs_remove_group(&dev->kobj, &lm87_group_in7);
+ sysfs_remove_group(&dev->kobj, &lm87_group_fan2);
+ sysfs_remove_group(&dev->kobj, &lm87_group_temp3);
+ sysfs_remove_group(&dev->kobj, &lm87_group_in0_5);
+ sysfs_remove_group(&dev->kobj, &lm87_group_vid);
+}
+
+static void lm87_init_client(struct i2c_client *client)
+{
+ struct lm87_data *data = i2c_get_clientdata(client);
+
+ if (dev_get_platdata(&client->dev)) {
+ data->channel = *(u8 *)dev_get_platdata(&client->dev);
+ lm87_write_value(client,
+ LM87_REG_CHANNEL_MODE, data->channel);
+ } else {
+ data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
+ }
+ data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
+
+ if (!(data->config & 0x01)) {
+ int i;
+
+ /* Limits are left uninitialized after power-up */
+ for (i = 1; i < 6; i++) {
+ lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
+ lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
+ }
+ for (i = 0; i < 2; i++) {
+ lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
+ lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
+ lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
+ lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
+ }
+ if (data->channel & CHAN_TEMP3) {
+ lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
+ lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
+ } else {
+ lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
+ lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
+ }
+ }
+
+ /* Make sure Start is set and INT#_Clear is clear */
+ if ((data->config & 0x09) != 0x01)
+ lm87_write_value(client, LM87_REG_CONFIG,
+ (data->config & 0x77) | 0x01);
+}
+
+static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct lm87_data *data;
+ int err;
+
+ data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ /* Initialize the LM87 chip */
+ lm87_init_client(client);
+
+ data->in_scale[0] = 2500;
+ data->in_scale[1] = 2700;
+ data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
+ data->in_scale[3] = 5000;
+ data->in_scale[4] = 12000;
+ data->in_scale[5] = 2700;
+ data->in_scale[6] = 1875;
+ data->in_scale[7] = 1875;
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group);
+ if (err)
+ goto exit_stop;
+
+ if (data->channel & CHAN_NO_FAN(0)) {
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_in6);
+ if (err)
+ goto exit_remove;
+ } else {
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan1);
+ if (err)
+ goto exit_remove;
+ }
+
+ if (data->channel & CHAN_NO_FAN(1)) {
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_in7);
+ if (err)
+ goto exit_remove;
+ } else {
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan2);
+ if (err)
+ goto exit_remove;
+ }
+
+ if (data->channel & CHAN_TEMP3) {
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_temp3);
+ if (err)
+ goto exit_remove;
+ } else {
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_in0_5);
+ if (err)
+ goto exit_remove;
+ }
+
+ if (!(data->channel & CHAN_NO_VID)) {
+ data->vrm = vid_which_vrm();
+ err = sysfs_create_group(&client->dev.kobj, &lm87_group_vid);
+ if (err)
+ goto exit_remove;
+ }
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove;
+ }
+
+ return 0;
+
+exit_remove:
+ lm87_remove_files(client);
+exit_stop:
+ lm87_write_value(client, LM87_REG_CONFIG, data->config);
+ return err;
+}
+
+static int lm87_remove(struct i2c_client *client)
+{
+ struct lm87_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ lm87_remove_files(client);
+
+ lm87_write_value(client, LM87_REG_CONFIG, data->config);
+ return 0;
+}
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static const struct i2c_device_id lm87_id[] = {
+ { "lm87", lm87 },
+ { "adm1024", adm1024 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm87_id);
+
+static struct i2c_driver lm87_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "lm87",
+ },
+ .probe = lm87_probe,
+ .remove = lm87_remove,
+ .id_table = lm87_id,
+ .detect = lm87_detect,
+ .address_list = normal_i2c,
+};
+
+module_i2c_driver(lm87_driver);
+
+MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de> and others");
+MODULE_DESCRIPTION("LM87 driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff