summaryrefslogtreecommitdiff
path: root/drivers/hwmon/adm1021.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/adm1021.c')
-rw-r--r--drivers/hwmon/adm1021.c503
1 files changed, 0 insertions, 503 deletions
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
deleted file mode 100644
index 87b42e0cfd2e..000000000000
--- a/drivers/hwmon/adm1021.c
+++ /dev/null
@@ -1,503 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
- * monitoring
- * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
- * Philip Edelbrock <phil@netroedge.com>
- */
-
-#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[] = {
- 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
-
-enum chips {
- adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066 };
-
-/* adm1021 constants specified below */
-
-/* The adm1021 registers */
-/* Read-only */
-/* For nr in 0-1 */
-#define ADM1021_REG_TEMP(nr) (nr)
-#define ADM1021_REG_STATUS 0x02
-/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
-#define ADM1021_REG_MAN_ID 0xFE
-/* ADM1021 = 0x0X, ADM1023 = 0x3X */
-#define ADM1021_REG_DEV_ID 0xFF
-/* These use different addresses for reading/writing */
-#define ADM1021_REG_CONFIG_R 0x03
-#define ADM1021_REG_CONFIG_W 0x09
-#define ADM1021_REG_CONV_RATE_R 0x04
-#define ADM1021_REG_CONV_RATE_W 0x0A
-/* These are for the ADM1023's additional precision on the remote temp sensor */
-#define ADM1023_REG_REM_TEMP_PREC 0x10
-#define ADM1023_REG_REM_OFFSET 0x11
-#define ADM1023_REG_REM_OFFSET_PREC 0x12
-#define ADM1023_REG_REM_TOS_PREC 0x13
-#define ADM1023_REG_REM_THYST_PREC 0x14
-/* limits */
-/* For nr in 0-1 */
-#define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr))
-#define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr))
-#define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr))
-#define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr))
-/* write-only */
-#define ADM1021_REG_ONESHOT 0x0F
-
-/* Initial values */
-
-/*
- * Note: Even though I left the low and high limits named os and hyst,
- * they don't quite work like a thermostat the way the LM75 does. I.e.,
- * a lower temp than THYST actually triggers an alarm instead of
- * clearing it. Weird, ey? --Phil
- */
-
-/* Each client has this additional data */
-struct adm1021_data {
- struct i2c_client *client;
- enum chips type;
-
- const struct attribute_group *groups[3];
-
- struct mutex update_lock;
- bool valid; /* true if following fields are valid */
- char low_power; /* !=0 if device in low power mode */
- unsigned long last_updated; /* In jiffies */
-
- int temp_max[2]; /* Register values */
- int temp_min[2];
- int temp[2];
- u8 alarms;
- /* Special values for ADM1023 only */
- u8 remote_temp_offset;
- u8 remote_temp_offset_prec;
-};
-
-/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
-static bool read_only;
-
-static struct adm1021_data *adm1021_update_device(struct device *dev)
-{
- struct adm1021_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
-
- mutex_lock(&data->update_lock);
-
- if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
- || !data->valid) {
- int i;
-
- dev_dbg(dev, "Starting adm1021 update\n");
-
- for (i = 0; i < 2; i++) {
- data->temp[i] = 1000 *
- (s8) i2c_smbus_read_byte_data(
- client, ADM1021_REG_TEMP(i));
- data->temp_max[i] = 1000 *
- (s8) i2c_smbus_read_byte_data(
- client, ADM1021_REG_TOS_R(i));
- if (data->type != lm84) {
- data->temp_min[i] = 1000 *
- (s8) i2c_smbus_read_byte_data(client,
- ADM1021_REG_THYST_R(i));
- }
- }
- data->alarms = i2c_smbus_read_byte_data(client,
- ADM1021_REG_STATUS) & 0x7c;
- if (data->type == adm1023) {
- /*
- * The ADM1023 provides 3 extra bits of precision for
- * the remote sensor in extra registers.
- */
- data->temp[1] += 125 * (i2c_smbus_read_byte_data(
- client, ADM1023_REG_REM_TEMP_PREC) >> 5);
- data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
- client, ADM1023_REG_REM_TOS_PREC) >> 5);
- data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
- client, ADM1023_REG_REM_THYST_PREC) >> 5);
- data->remote_temp_offset =
- i2c_smbus_read_byte_data(client,
- ADM1023_REG_REM_OFFSET);
- data->remote_temp_offset_prec =
- i2c_smbus_read_byte_data(client,
- ADM1023_REG_REM_OFFSET_PREC);
- }
- data->last_updated = jiffies;
- data->valid = true;
- }
-
- mutex_unlock(&data->update_lock);
-
- return data;
-}
-
-static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- int index = to_sensor_dev_attr(devattr)->index;
- struct adm1021_data *data = adm1021_update_device(dev);
-
- return sprintf(buf, "%d\n", data->temp[index]);
-}
-
-static ssize_t temp_max_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- int index = to_sensor_dev_attr(devattr)->index;
- struct adm1021_data *data = adm1021_update_device(dev);
-
- return sprintf(buf, "%d\n", data->temp_max[index]);
-}
-
-static ssize_t temp_min_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- int index = to_sensor_dev_attr(devattr)->index;
- struct adm1021_data *data = adm1021_update_device(dev);
-
- return sprintf(buf, "%d\n", data->temp_min[index]);
-}
-
-static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- int index = to_sensor_dev_attr(attr)->index;
- struct adm1021_data *data = adm1021_update_device(dev);
- return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
-}
-
-static ssize_t alarms_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct adm1021_data *data = adm1021_update_device(dev);
- return sprintf(buf, "%u\n", data->alarms);
-}
-
-static ssize_t temp_max_store(struct device *dev,
- struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- int index = to_sensor_dev_attr(devattr)->index;
- struct adm1021_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- long temp;
- int reg_val, err;
-
- err = kstrtol(buf, 10, &temp);
- if (err)
- return err;
- temp /= 1000;
-
- mutex_lock(&data->update_lock);
- reg_val = clamp_val(temp, -128, 127);
- data->temp_max[index] = reg_val * 1000;
- if (!read_only)
- i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
- reg_val);
- mutex_unlock(&data->update_lock);
-
- return count;
-}
-
-static ssize_t temp_min_store(struct device *dev,
- struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- int index = to_sensor_dev_attr(devattr)->index;
- struct adm1021_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- long temp;
- int reg_val, err;
-
- err = kstrtol(buf, 10, &temp);
- if (err)
- return err;
- temp /= 1000;
-
- mutex_lock(&data->update_lock);
- reg_val = clamp_val(temp, -128, 127);
- data->temp_min[index] = reg_val * 1000;
- if (!read_only)
- i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
- reg_val);
- mutex_unlock(&data->update_lock);
-
- return count;
-}
-
-static ssize_t low_power_show(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct adm1021_data *data = adm1021_update_device(dev);
- return sprintf(buf, "%d\n", data->low_power);
-}
-
-static ssize_t low_power_store(struct device *dev,
- struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- struct adm1021_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- char low_power;
- unsigned long val;
- int err;
-
- err = kstrtoul(buf, 10, &val);
- if (err)
- return err;
- low_power = val != 0;
-
- mutex_lock(&data->update_lock);
- if (low_power != data->low_power) {
- int config = i2c_smbus_read_byte_data(
- client, ADM1021_REG_CONFIG_R);
- data->low_power = low_power;
- i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
- (config & 0xBF) | (low_power << 6));
- }
- mutex_unlock(&data->update_lock);
-
- return count;
-}
-
-
-static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
-static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
-static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
-static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
-static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 6);
-static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, alarm, 5);
-static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 4);
-static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, alarm, 3);
-static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 2);
-
-static DEVICE_ATTR_RO(alarms);
-static DEVICE_ATTR_RW(low_power);
-
-static struct attribute *adm1021_attributes[] = {
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp2_max.dev_attr.attr,
- &sensor_dev_attr_temp2_input.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp2_fault.dev_attr.attr,
- &dev_attr_alarms.attr,
- &dev_attr_low_power.attr,
- NULL
-};
-
-static const struct attribute_group adm1021_group = {
- .attrs = adm1021_attributes,
-};
-
-static struct attribute *adm1021_min_attributes[] = {
- &sensor_dev_attr_temp1_min.dev_attr.attr,
- &sensor_dev_attr_temp2_min.dev_attr.attr,
- &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
- NULL
-};
-
-static const struct attribute_group adm1021_min_group = {
- .attrs = adm1021_min_attributes,
-};
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int adm1021_detect(struct i2c_client *client,
- struct i2c_board_info *info)
-{
- struct i2c_adapter *adapter = client->adapter;
- const char *type_name;
- int reg, conv_rate, status, config, man_id, dev_id;
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- pr_debug("detect failed, smbus byte data not supported!\n");
- return -ENODEV;
- }
-
- status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
- conv_rate = i2c_smbus_read_byte_data(client,
- ADM1021_REG_CONV_RATE_R);
- config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
-
- /* Check unused bits */
- if ((status & 0x03) || (config & 0x3F) || (conv_rate & 0xF8)) {
- pr_debug("detect failed, chip not detected!\n");
- return -ENODEV;
- }
-
- /* Determine the chip type. */
- man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
- dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);
-
- if (man_id < 0 || dev_id < 0)
- return -ENODEV;
-
- if (man_id == 0x4d && dev_id == 0x01) {
- /*
- * dev_id 0x01 matches MAX6680, MAX6695, MAX6696, and possibly
- * others. Read register which is unsupported on MAX1617 but
- * exists on all those chips and compare with the dev_id
- * register. If it matches, it may be a MAX1617A.
- */
- reg = i2c_smbus_read_byte_data(client,
- ADM1023_REG_REM_TEMP_PREC);
- if (reg != dev_id)
- return -ENODEV;
- type_name = "max1617a";
- } else if (man_id == 0x41) {
- if ((dev_id & 0xF0) == 0x30)
- type_name = "adm1023";
- else if ((dev_id & 0xF0) == 0x00)
- type_name = "adm1021";
- else
- return -ENODEV;
- } else if (man_id == 0x49)
- type_name = "thmc10";
- else if (man_id == 0x23)
- type_name = "gl523sm";
- else if (man_id == 0x54)
- type_name = "mc1066";
- else {
- int lte, rte, lhi, rhi, llo, rlo;
-
- /* extra checks for LM84 and MAX1617 to avoid misdetections */
-
- llo = i2c_smbus_read_byte_data(client, ADM1021_REG_THYST_R(0));
- rlo = i2c_smbus_read_byte_data(client, ADM1021_REG_THYST_R(1));
-
- /* fail if any of the additional register reads failed */
- if (llo < 0 || rlo < 0)
- return -ENODEV;
-
- lte = i2c_smbus_read_byte_data(client, ADM1021_REG_TEMP(0));
- rte = i2c_smbus_read_byte_data(client, ADM1021_REG_TEMP(1));
- lhi = i2c_smbus_read_byte_data(client, ADM1021_REG_TOS_R(0));
- rhi = i2c_smbus_read_byte_data(client, ADM1021_REG_TOS_R(1));
-
- /*
- * Fail for negative temperatures and negative high limits.
- * This check also catches read errors on the tested registers.
- */
- if ((s8)lte < 0 || (s8)rte < 0 || (s8)lhi < 0 || (s8)rhi < 0)
- return -ENODEV;
-
- /* fail if all registers hold the same value */
- if (lte == rte && lte == lhi && lte == rhi && lte == llo
- && lte == rlo)
- return -ENODEV;
-
- /*
- * LM84 Mfr ID is in a different place,
- * and it has more unused bits. Registers at 0xfe and 0xff
- * are undefined and return the most recently read value,
- * here the value of the configuration register.
- */
- if (conv_rate == 0x00
- && man_id == config && dev_id == config
- && (config & 0x7F) == 0x00
- && (status & 0xAB) == 0x00) {
- type_name = "lm84";
- } else {
- if ((config & 0x3f) || (status & 0x03))
- return -ENODEV;
- /* fail if low limits are larger than high limits */
- if ((s8)llo > lhi || (s8)rlo > rhi)
- return -ENODEV;
- type_name = "max1617";
- }
- }
-
- pr_debug("Detected chip %s at adapter %d, address 0x%02x.\n",
- type_name, i2c_adapter_id(adapter), client->addr);
- strscpy(info->type, type_name, I2C_NAME_SIZE);
-
- return 0;
-}
-
-static void adm1021_init_client(struct i2c_client *client)
-{
- /* Enable ADC and disable suspend mode */
- i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
- i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
- /* Set Conversion rate to 1/sec (this can be tinkered with) */
- i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
-}
-
-static int adm1021_probe(struct i2c_client *client)
-{
- struct device *dev = &client->dev;
- struct adm1021_data *data;
- struct device *hwmon_dev;
-
- data = devm_kzalloc(dev, sizeof(struct adm1021_data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->client = client;
- data->type = (uintptr_t)i2c_get_match_data(client);
- mutex_init(&data->update_lock);
-
- /* Initialize the ADM1021 chip */
- if (data->type != lm84 && !read_only)
- adm1021_init_client(client);
-
- data->groups[0] = &adm1021_group;
- if (data->type != lm84)
- data->groups[1] = &adm1021_min_group;
-
- hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
- data, data->groups);
-
- return PTR_ERR_OR_ZERO(hwmon_dev);
-}
-
-static const struct i2c_device_id adm1021_id[] = {
- { "adm1021", adm1021 },
- { "adm1023", adm1023 },
- { "max1617", max1617 },
- { "max1617a", max1617a },
- { "thmc10", thmc10 },
- { "lm84", lm84 },
- { "gl523sm", gl523sm },
- { "mc1066", mc1066 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, adm1021_id);
-
-static struct i2c_driver adm1021_driver = {
- .class = I2C_CLASS_HWMON,
- .driver = {
- .name = "adm1021",
- },
- .probe = adm1021_probe,
- .id_table = adm1021_id,
- .detect = adm1021_detect,
- .address_list = normal_i2c,
-};
-
-module_i2c_driver(adm1021_driver);
-
-MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
- "Philip Edelbrock <phil@netroedge.com>");
-MODULE_DESCRIPTION("adm1021 driver");
-MODULE_LICENSE("GPL");
-
-module_param(read_only, bool, 0);
-MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-02-12 02:26:58 +0000