[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/hwmon/lm80.c b/ap/os/linux/linux-3.4.x/drivers/hwmon/lm80.c
new file mode 100644
index 0000000..e2c43e1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/hwmon/lm80.c
@@ -0,0 +1,737 @@
+/*
+ * lm80.c - From lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
+ * and Philip Edelbrock <phil@netroedge.com>
+ *
+ * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
+ *
+ * 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/err.h>
+#include <linux/mutex.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
+ 0x2e, 0x2f, I2C_CLIENT_END };
+
+/* Many LM80 constants specified below */
+
+/* The LM80 registers */
+#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
+#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
+#define LM80_REG_IN(nr) (0x20 + (nr))
+
+#define LM80_REG_FAN1 0x28
+#define LM80_REG_FAN2 0x29
+#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
+
+#define LM80_REG_TEMP 0x27
+#define LM80_REG_TEMP_HOT_MAX 0x38
+#define LM80_REG_TEMP_HOT_HYST 0x39
+#define LM80_REG_TEMP_OS_MAX 0x3a
+#define LM80_REG_TEMP_OS_HYST 0x3b
+
+#define LM80_REG_CONFIG 0x00
+#define LM80_REG_ALARM1 0x01
+#define LM80_REG_ALARM2 0x02
+#define LM80_REG_MASK1 0x03
+#define LM80_REG_MASK2 0x04
+#define LM80_REG_FANDIV 0x05
+#define LM80_REG_RES 0x06
+
+#define LM96080_REG_CONV_RATE 0x07
+#define LM96080_REG_MAN_ID 0x3e
+#define LM96080_REG_DEV_ID 0x3f
+
+
+/*
+ * Conversions. Rounding and limit checking is only done on the TO_REG
+ * variants. Note that you should be a bit careful with which arguments
+ * these macros are called: arguments may be evaluated more than once.
+ * Fixing this is just not worth it.
+ */
+
+#define IN_TO_REG(val) (SENSORS_LIMIT(((val) + 5) / 10, 0, 255))
+#define IN_FROM_REG(val) ((val) * 10)
+
+static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
+{
+ if (rpm == 0)
+ return 255;
+ rpm = SENSORS_LIMIT(rpm, 1, 1000000);
+ return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
+}
+
+#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
+ (val) == 255 ? 0 : 1350000/((div) * (val)))
+
+static inline long TEMP_FROM_REG(u16 temp)
+{
+ long res;
+
+ temp >>= 4;
+ if (temp < 0x0800)
+ res = 625 * (long) temp;
+ else
+ res = ((long) temp - 0x01000) * 625;
+
+ return res / 10;
+}
+
+#define TEMP_LIMIT_FROM_REG(val) (((val) > 0x80 ? \
+ (val) - 0x100 : (val)) * 1000)
+
+#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val) < 0 ? \
+ ((val) - 500) / 1000 : ((val) + 500) / 1000, 0, 255)
+
+#define DIV_FROM_REG(val) (1 << (val))
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct lm80_data {
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ char error; /* !=0 if error occurred during last update */
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ u8 in[7]; /* Register value */
+ u8 in_max[7]; /* Register value */
+ u8 in_min[7]; /* Register value */
+ u8 fan[2]; /* Register value */
+ u8 fan_min[2]; /* Register value */
+ u8 fan_div[2]; /* Register encoding, shifted right */
+ u16 temp; /* Register values, shifted right */
+ u8 temp_hot_max; /* Register value */
+ u8 temp_hot_hyst; /* Register value */
+ u8 temp_os_max; /* Register value */
+ u8 temp_os_hyst; /* Register value */
+ u16 alarms; /* Register encoding, combined */
+};
+
+/*
+ * Functions declaration
+ */
+
+static int lm80_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
+static void lm80_init_client(struct i2c_client *client);
+static int lm80_remove(struct i2c_client *client);
+static struct lm80_data *lm80_update_device(struct device *dev);
+static int lm80_read_value(struct i2c_client *client, u8 reg);
+static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static const struct i2c_device_id lm80_id[] = {
+ { "lm80", 0 },
+ { "lm96080", 1 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm80_id);
+
+static struct i2c_driver lm80_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "lm80",
+ },
+ .probe = lm80_probe,
+ .remove = lm80_remove,
+ .id_table = lm80_id,
+ .detect = lm80_detect,
+ .address_list = normal_i2c,
+};
+
+/*
+ * Sysfs stuff
+ */
+
+#define show_in(suffix, value) \
+static ssize_t show_in_##suffix(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ struct lm80_data *data = lm80_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
+}
+show_in(min, in_min)
+show_in(max, in_max)
+show_in(input, in)
+
+#define set_in(suffix, value, reg) \
+static ssize_t set_in_##suffix(struct device *dev, \
+ struct device_attribute *attr, const char *buf, size_t count) \
+{ \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ long val; \
+ int err = kstrtol(buf, 10, &val); \
+ if (err < 0) \
+ return err; \
+\
+ mutex_lock(&data->update_lock);\
+ data->value[nr] = IN_TO_REG(val); \
+ lm80_write_value(client, reg(nr), data->value[nr]); \
+ mutex_unlock(&data->update_lock);\
+ return count; \
+}
+set_in(min, in_min, LM80_REG_IN_MIN)
+set_in(max, in_max, LM80_REG_IN_MAX)
+
+#define show_fan(suffix, value) \
+static ssize_t show_fan_##suffix(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ int nr = to_sensor_dev_attr(attr)->index; \
+ struct lm80_data *data = lm80_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
+ DIV_FROM_REG(data->fan_div[nr]))); \
+}
+show_fan(min, fan_min)
+show_fan(input, fan)
+
+static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+ return sprintf(buf, "%d\n", 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)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm80_data *data = i2c_get_clientdata(client);
+ unsigned long val;
+ int err = kstrtoul(buf, 10, &val);
+ if (err < 0)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
+ lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), 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 divisor. This follows the principle of
+ * least surprise; the user doesn't expect the fan minimum to change just
+ * because the divisor changed.
+ */
+static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm80_data *data = i2c_get_clientdata(client);
+ unsigned long min, val;
+ u8 reg;
+ int err = kstrtoul(buf, 10, &val);
+ if (err < 0)
+ return err;
+
+ /* Save fan_min */
+ mutex_lock(&data->update_lock);
+ min = FAN_FROM_REG(data->fan_min[nr],
+ 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:
+ dev_err(&client->dev, "fan_div value %ld not "
+ "supported. Choose one of 1, 2, 4 or 8!\n", val);
+ mutex_unlock(&data->update_lock);
+ return -EINVAL;
+ }
+
+ reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
+ | (data->fan_div[nr] << (2 * (nr + 1)));
+ lm80_write_value(client, LM80_REG_FANDIV, reg);
+
+ /* Restore fan_min */
+ data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
+ lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static ssize_t show_temp_input1(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+ return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
+}
+
+#define show_temp(suffix, value) \
+static ssize_t show_temp_##suffix(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct lm80_data *data = lm80_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
+ return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
+}
+show_temp(hot_max, temp_hot_max);
+show_temp(hot_hyst, temp_hot_hyst);
+show_temp(os_max, temp_os_max);
+show_temp(os_hyst, temp_os_hyst);
+
+#define set_temp(suffix, value, reg) \
+static ssize_t set_temp_##suffix(struct device *dev, \
+ struct device_attribute *attr, const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ long val; \
+ int err = kstrtol(buf, 10, &val); \
+ if (err < 0) \
+ return err; \
+\
+ mutex_lock(&data->update_lock); \
+ data->value = TEMP_LIMIT_TO_REG(val); \
+ lm80_write_value(client, reg, data->value); \
+ mutex_unlock(&data->update_lock); \
+ return count; \
+}
+set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
+set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
+set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
+set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
+
+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+ return sprintf(buf, "%u\n", data->alarms);
+}
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+ return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
+}
+
+static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 0);
+static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 1);
+static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 2);
+static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 3);
+static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 4);
+static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 5);
+static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
+ show_in_min, set_in_min, 6);
+static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 0);
+static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 1);
+static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 2);
+static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 3);
+static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 4);
+static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 5);
+static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
+ show_in_max, set_in_max, 6);
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
+static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
+static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
+static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
+ show_fan_min, set_fan_min, 0);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
+ show_fan_min, set_fan_min, 1);
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
+ show_fan_div, set_fan_div, 0);
+static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
+ show_fan_div, set_fan_div, 1);
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
+static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
+ set_temp_hot_max);
+static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
+ set_temp_hot_hyst);
+static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
+ set_temp_os_max);
+static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
+ set_temp_os_hyst);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+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, 4);
+static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
+static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
+
+/*
+ * Real code
+ */
+
+static struct attribute *lm80_attributes[] = {
+ &sensor_dev_attr_in0_min.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in5_min.dev_attr.attr,
+ &sensor_dev_attr_in6_min.dev_attr.attr,
+ &sensor_dev_attr_in0_max.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in5_max.dev_attr.attr,
+ &sensor_dev_attr_in6_max.dev_attr.attr,
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in6_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp1_max.attr,
+ &dev_attr_temp1_max_hyst.attr,
+ &dev_attr_temp1_crit.attr,
+ &dev_attr_temp1_crit_hyst.attr,
+ &dev_attr_alarms.attr,
+ &sensor_dev_attr_in0_alarm.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+ &sensor_dev_attr_in3_alarm.dev_attr.attr,
+ &sensor_dev_attr_in4_alarm.dev_attr.attr,
+ &sensor_dev_attr_in5_alarm.dev_attr.attr,
+ &sensor_dev_attr_in6_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm80_group = {
+ .attrs = lm80_attributes,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int i, cur, man_id, dev_id;
+ const char *name = NULL;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* First check for unused bits, common to both chip types */
+ if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
+ || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
+ return -ENODEV;
+
+ /*
+ * The LM96080 has manufacturer and stepping/die rev registers so we
+ * can just check that. The LM80 does not have such registers so we
+ * have to use a more expensive trick.
+ */
+ man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
+ dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
+ if (man_id == 0x01 && dev_id == 0x08) {
+ /* Check more unused bits for confirmation */
+ if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
+ return -ENODEV;
+
+ name = "lm96080";
+ } else {
+ /* Check 6-bit addressing */
+ for (i = 0x2a; i <= 0x3d; i++) {
+ cur = i2c_smbus_read_byte_data(client, i);
+ if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
+ || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
+ || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
+ return -ENODEV;
+ }
+
+ name = "lm80";
+ }
+
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int lm80_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm80_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ /* Initialize the LM80 chip */
+ lm80_init_client(client);
+
+ /* A few vars need to be filled upon startup */
+ data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
+ data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&client->dev.kobj, &lm80_group);
+ if (err)
+ goto error_free;
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto error_remove;
+ }
+
+ return 0;
+
+error_remove:
+ sysfs_remove_group(&client->dev.kobj, &lm80_group);
+error_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int lm80_remove(struct i2c_client *client)
+{
+ struct lm80_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &lm80_group);
+
+ kfree(data);
+ return 0;
+}
+
+static int lm80_read_value(struct i2c_client *client, u8 reg)
+{
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+/* Called when we have found a new LM80. */
+static void lm80_init_client(struct i2c_client *client)
+{
+ /*
+ * Reset all except Watchdog values and last conversion values
+ * This sets fan-divs to 2, among others. This makes most other
+ * initializations unnecessary
+ */
+ lm80_write_value(client, LM80_REG_CONFIG, 0x80);
+ /* Set 11-bit temperature resolution */
+ lm80_write_value(client, LM80_REG_RES, 0x08);
+
+ /* Start monitoring */
+ lm80_write_value(client, LM80_REG_CONFIG, 0x01);
+}
+
+static struct lm80_data *lm80_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm80_data *data = i2c_get_clientdata(client);
+ int i;
+ int rv;
+ int prev_rv;
+ struct lm80_data *ret = data;
+
+ mutex_lock(&data->update_lock);
+
+ if (data->error)
+ lm80_init_client(client);
+
+ if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
+ dev_dbg(&client->dev, "Starting lm80 update\n");
+ for (i = 0; i <= 6; i++) {
+ rv = lm80_read_value(client, LM80_REG_IN(i));
+ if (rv < 0)
+ goto abort;
+ data->in[i] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
+ if (rv < 0)
+ goto abort;
+ data->in_min[i] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
+ if (rv < 0)
+ goto abort;
+ data->in_max[i] = rv;
+ }
+
+ rv = lm80_read_value(client, LM80_REG_FAN1);
+ if (rv < 0)
+ goto abort;
+ data->fan[0] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
+ if (rv < 0)
+ goto abort;
+ data->fan_min[0] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FAN2);
+ if (rv < 0)
+ goto abort;
+ data->fan[1] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
+ if (rv < 0)
+ goto abort;
+ data->fan_min[1] = rv;
+
+ prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
+ if (rv < 0)
+ goto abort;
+ rv = lm80_read_value(client, LM80_REG_RES);
+ if (rv < 0)
+ goto abort;
+ data->temp = (prev_rv << 8) | (rv & 0xf0);
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
+ if (rv < 0)
+ goto abort;
+ data->temp_os_max = rv;
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
+ if (rv < 0)
+ goto abort;
+ data->temp_os_hyst = rv;
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
+ if (rv < 0)
+ goto abort;
+ data->temp_hot_max = rv;
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
+ if (rv < 0)
+ goto abort;
+ data->temp_hot_hyst = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FANDIV);
+ if (rv < 0)
+ goto abort;
+ data->fan_div[0] = (rv >> 2) & 0x03;
+ data->fan_div[1] = (rv >> 4) & 0x03;
+
+ prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
+ if (rv < 0)
+ goto abort;
+ rv = lm80_read_value(client, LM80_REG_ALARM2);
+ if (rv < 0)
+ goto abort;
+ data->alarms = prev_rv + (rv << 8);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ data->error = 0;
+ }
+ goto done;
+
+abort:
+ ret = ERR_PTR(rv);
+ data->valid = 0;
+ data->error = 1;
+
+done:
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+}
+
+module_i2c_driver(lm80_driver);
+
+MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
+ "Philip Edelbrock <phil@netroedge.com>");
+MODULE_DESCRIPTION("LM80 driver");
+MODULE_LICENSE("GPL");