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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/hwmon/jc42.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/hwmon/jc42.c')
-rw-r--r--ANDROID_3.4.5/drivers/hwmon/jc42.c595
1 files changed, 0 insertions, 595 deletions
diff --git a/ANDROID_3.4.5/drivers/hwmon/jc42.c b/ANDROID_3.4.5/drivers/hwmon/jc42.c
deleted file mode 100644
index a9bfd673..00000000
--- a/ANDROID_3.4.5/drivers/hwmon/jc42.c
+++ /dev/null
@@ -1,595 +0,0 @@
-/*
- * jc42.c - driver for Jedec JC42.4 compliant temperature sensors
- *
- * Copyright (c) 2010 Ericsson AB.
- *
- * Derived from lm77.c by Andras BALI <drewie@freemail.hu>.
- *
- * JC42.4 compliant temperature sensors are typically used on memory modules.
- *
- * 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[] = {
- 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END };
-
-/* JC42 registers. All registers are 16 bit. */
-#define JC42_REG_CAP 0x00
-#define JC42_REG_CONFIG 0x01
-#define JC42_REG_TEMP_UPPER 0x02
-#define JC42_REG_TEMP_LOWER 0x03
-#define JC42_REG_TEMP_CRITICAL 0x04
-#define JC42_REG_TEMP 0x05
-#define JC42_REG_MANID 0x06
-#define JC42_REG_DEVICEID 0x07
-
-/* Status bits in temperature register */
-#define JC42_ALARM_CRIT_BIT 15
-#define JC42_ALARM_MAX_BIT 14
-#define JC42_ALARM_MIN_BIT 13
-
-/* Configuration register defines */
-#define JC42_CFG_CRIT_ONLY (1 << 2)
-#define JC42_CFG_TCRIT_LOCK (1 << 6)
-#define JC42_CFG_EVENT_LOCK (1 << 7)
-#define JC42_CFG_SHUTDOWN (1 << 8)
-#define JC42_CFG_HYST_SHIFT 9
-#define JC42_CFG_HYST_MASK 0x03
-
-/* Capabilities */
-#define JC42_CAP_RANGE (1 << 2)
-
-/* Manufacturer IDs */
-#define ADT_MANID 0x11d4 /* Analog Devices */
-#define ATMEL_MANID 0x001f /* Atmel */
-#define MAX_MANID 0x004d /* Maxim */
-#define IDT_MANID 0x00b3 /* IDT */
-#define MCP_MANID 0x0054 /* Microchip */
-#define NXP_MANID 0x1131 /* NXP Semiconductors */
-#define ONS_MANID 0x1b09 /* ON Semiconductor */
-#define STM_MANID 0x104a /* ST Microelectronics */
-
-/* Supported chips */
-
-/* Analog Devices */
-#define ADT7408_DEVID 0x0801
-#define ADT7408_DEVID_MASK 0xffff
-
-/* Atmel */
-#define AT30TS00_DEVID 0x8201
-#define AT30TS00_DEVID_MASK 0xffff
-
-/* IDT */
-#define TS3000B3_DEVID 0x2903 /* Also matches TSE2002B3 */
-#define TS3000B3_DEVID_MASK 0xffff
-
-#define TS3000GB2_DEVID 0x2912 /* Also matches TSE2002GB2 */
-#define TS3000GB2_DEVID_MASK 0xffff
-
-/* Maxim */
-#define MAX6604_DEVID 0x3e00
-#define MAX6604_DEVID_MASK 0xffff
-
-/* Microchip */
-#define MCP9804_DEVID 0x0200
-#define MCP9804_DEVID_MASK 0xfffc
-
-#define MCP98242_DEVID 0x2000
-#define MCP98242_DEVID_MASK 0xfffc
-
-#define MCP98243_DEVID 0x2100
-#define MCP98243_DEVID_MASK 0xfffc
-
-#define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */
-#define MCP9843_DEVID_MASK 0xfffe
-
-/* NXP */
-#define SE97_DEVID 0xa200
-#define SE97_DEVID_MASK 0xfffc
-
-#define SE98_DEVID 0xa100
-#define SE98_DEVID_MASK 0xfffc
-
-/* ON Semiconductor */
-#define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */
-#define CAT6095_DEVID_MASK 0xffe0
-
-/* ST Microelectronics */
-#define STTS424_DEVID 0x0101
-#define STTS424_DEVID_MASK 0xffff
-
-#define STTS424E_DEVID 0x0000
-#define STTS424E_DEVID_MASK 0xfffe
-
-#define STTS2002_DEVID 0x0300
-#define STTS2002_DEVID_MASK 0xffff
-
-#define STTS3000_DEVID 0x0200
-#define STTS3000_DEVID_MASK 0xffff
-
-static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 };
-
-struct jc42_chips {
- u16 manid;
- u16 devid;
- u16 devid_mask;
-};
-
-static struct jc42_chips jc42_chips[] = {
- { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK },
- { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK },
- { IDT_MANID, TS3000B3_DEVID, TS3000B3_DEVID_MASK },
- { IDT_MANID, TS3000GB2_DEVID, TS3000GB2_DEVID_MASK },
- { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK },
- { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK },
- { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK },
- { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK },
- { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK },
- { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK },
- { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK },
- { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK },
- { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK },
- { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK },
- { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK },
- { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK },
-};
-
-/* Each client has this additional data */
-struct jc42_data {
- struct device *hwmon_dev;
- struct mutex update_lock; /* protect register access */
- bool extended; /* true if extended range supported */
- bool valid;
- unsigned long last_updated; /* In jiffies */
- u16 orig_config; /* original configuration */
- u16 config; /* current configuration */
- u16 temp_input; /* Temperatures */
- u16 temp_crit;
- u16 temp_min;
- u16 temp_max;
-};
-
-static int jc42_probe(struct i2c_client *client,
- const struct i2c_device_id *id);
-static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info);
-static int jc42_remove(struct i2c_client *client);
-
-static struct jc42_data *jc42_update_device(struct device *dev);
-
-static const struct i2c_device_id jc42_id[] = {
- { "jc42", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, jc42_id);
-
-#ifdef CONFIG_PM
-
-static int jc42_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct jc42_data *data = i2c_get_clientdata(client);
-
- data->config |= JC42_CFG_SHUTDOWN;
- i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config);
- return 0;
-}
-
-static int jc42_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct jc42_data *data = i2c_get_clientdata(client);
-
- data->config &= ~JC42_CFG_SHUTDOWN;
- i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config);
- return 0;
-}
-
-static const struct dev_pm_ops jc42_dev_pm_ops = {
- .suspend = jc42_suspend,
- .resume = jc42_resume,
-};
-
-#define JC42_DEV_PM_OPS (&jc42_dev_pm_ops)
-#else
-#define JC42_DEV_PM_OPS NULL
-#endif /* CONFIG_PM */
-
-/* This is the driver that will be inserted */
-static struct i2c_driver jc42_driver = {
- .class = I2C_CLASS_SPD,
- .driver = {
- .name = "jc42",
- .pm = JC42_DEV_PM_OPS,
- },
- .probe = jc42_probe,
- .remove = jc42_remove,
- .id_table = jc42_id,
- .detect = jc42_detect,
- .address_list = normal_i2c,
-};
-
-#define JC42_TEMP_MIN_EXTENDED (-40000)
-#define JC42_TEMP_MIN 0
-#define JC42_TEMP_MAX 125000
-
-static u16 jc42_temp_to_reg(int temp, bool extended)
-{
- int ntemp = SENSORS_LIMIT(temp,
- extended ? JC42_TEMP_MIN_EXTENDED :
- JC42_TEMP_MIN, JC42_TEMP_MAX);
-
- /* convert from 0.001 to 0.0625 resolution */
- return (ntemp * 2 / 125) & 0x1fff;
-}
-
-static int jc42_temp_from_reg(s16 reg)
-{
- reg &= 0x1fff;
-
- /* sign extend register */
- if (reg & 0x1000)
- reg |= 0xf000;
-
- /* convert from 0.0625 to 0.001 resolution */
- return reg * 125 / 2;
-}
-
-/* sysfs stuff */
-
-/* read routines for temperature limits */
-#define show(value) \
-static ssize_t show_##value(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- struct jc42_data *data = jc42_update_device(dev); \
- if (IS_ERR(data)) \
- return PTR_ERR(data); \
- return sprintf(buf, "%d\n", jc42_temp_from_reg(data->value)); \
-}
-
-show(temp_input);
-show(temp_crit);
-show(temp_min);
-show(temp_max);
-
-/* read routines for hysteresis values */
-static ssize_t show_temp_crit_hyst(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct jc42_data *data = jc42_update_device(dev);
- int temp, hyst;
-
- if (IS_ERR(data))
- return PTR_ERR(data);
-
- temp = jc42_temp_from_reg(data->temp_crit);
- hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
- & JC42_CFG_HYST_MASK];
- return sprintf(buf, "%d\n", temp - hyst);
-}
-
-static ssize_t show_temp_max_hyst(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct jc42_data *data = jc42_update_device(dev);
- int temp, hyst;
-
- if (IS_ERR(data))
- return PTR_ERR(data);
-
- temp = jc42_temp_from_reg(data->temp_max);
- hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
- & JC42_CFG_HYST_MASK];
- return sprintf(buf, "%d\n", temp - hyst);
-}
-
-/* write routines */
-#define set(value, reg) \
-static ssize_t set_##value(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t count) \
-{ \
- struct i2c_client *client = to_i2c_client(dev); \
- struct jc42_data *data = i2c_get_clientdata(client); \
- int err, ret = count; \
- long val; \
- if (kstrtol(buf, 10, &val) < 0) \
- return -EINVAL; \
- mutex_lock(&data->update_lock); \
- data->value = jc42_temp_to_reg(val, data->extended); \
- err = i2c_smbus_write_word_swapped(client, reg, data->value); \
- if (err < 0) \
- ret = err; \
- mutex_unlock(&data->update_lock); \
- return ret; \
-}
-
-set(temp_min, JC42_REG_TEMP_LOWER);
-set(temp_max, JC42_REG_TEMP_UPPER);
-set(temp_crit, JC42_REG_TEMP_CRITICAL);
-
-/*
- * JC42.4 compliant chips only support four hysteresis values.
- * Pick best choice and go from there.
- */
-static ssize_t set_temp_crit_hyst(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct jc42_data *data = i2c_get_clientdata(client);
- unsigned long val;
- int diff, hyst;
- int err;
- int ret = count;
-
- if (kstrtoul(buf, 10, &val) < 0)
- return -EINVAL;
-
- diff = jc42_temp_from_reg(data->temp_crit) - val;
- hyst = 0;
- if (diff > 0) {
- if (diff < 2250)
- hyst = 1; /* 1.5 degrees C */
- else if (diff < 4500)
- hyst = 2; /* 3.0 degrees C */
- else
- hyst = 3; /* 6.0 degrees C */
- }
-
- mutex_lock(&data->update_lock);
- data->config = (data->config
- & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT))
- | (hyst << JC42_CFG_HYST_SHIFT);
- err = i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG,
- data->config);
- if (err < 0)
- ret = err;
- mutex_unlock(&data->update_lock);
- return ret;
-}
-
-static ssize_t show_alarm(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u16 bit = to_sensor_dev_attr(attr)->index;
- struct jc42_data *data = jc42_update_device(dev);
- u16 val;
-
- if (IS_ERR(data))
- return PTR_ERR(data);
-
- val = data->temp_input;
- if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY))
- val = 0;
- return sprintf(buf, "%u\n", (val >> bit) & 1);
-}
-
-static DEVICE_ATTR(temp1_input, S_IRUGO,
- show_temp_input, NULL);
-static DEVICE_ATTR(temp1_crit, S_IRUGO,
- show_temp_crit, set_temp_crit);
-static DEVICE_ATTR(temp1_min, S_IRUGO,
- show_temp_min, set_temp_min);
-static DEVICE_ATTR(temp1_max, S_IRUGO,
- show_temp_max, set_temp_max);
-
-static DEVICE_ATTR(temp1_crit_hyst, S_IRUGO,
- show_temp_crit_hyst, set_temp_crit_hyst);
-static DEVICE_ATTR(temp1_max_hyst, S_IRUGO,
- show_temp_max_hyst, NULL);
-
-static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
- JC42_ALARM_CRIT_BIT);
-static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
- JC42_ALARM_MIN_BIT);
-static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
- JC42_ALARM_MAX_BIT);
-
-static struct attribute *jc42_attributes[] = {
- &dev_attr_temp1_input.attr,
- &dev_attr_temp1_crit.attr,
- &dev_attr_temp1_min.attr,
- &dev_attr_temp1_max.attr,
- &dev_attr_temp1_crit_hyst.attr,
- &dev_attr_temp1_max_hyst.attr,
- &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- NULL
-};
-
-static umode_t jc42_attribute_mode(struct kobject *kobj,
- struct attribute *attr, int index)
-{
- struct device *dev = container_of(kobj, struct device, kobj);
- struct i2c_client *client = to_i2c_client(dev);
- struct jc42_data *data = i2c_get_clientdata(client);
- unsigned int config = data->config;
- bool readonly;
-
- if (attr == &dev_attr_temp1_crit.attr)
- readonly = config & JC42_CFG_TCRIT_LOCK;
- else if (attr == &dev_attr_temp1_min.attr ||
- attr == &dev_attr_temp1_max.attr)
- readonly = config & JC42_CFG_EVENT_LOCK;
- else if (attr == &dev_attr_temp1_crit_hyst.attr)
- readonly = config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK);
- else
- readonly = true;
-
- return S_IRUGO | (readonly ? 0 : S_IWUSR);
-}
-
-static const struct attribute_group jc42_group = {
- .attrs = jc42_attributes,
- .is_visible = jc42_attribute_mode,
-};
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info)
-{
- struct i2c_adapter *adapter = client->adapter;
- int i, config, cap, manid, devid;
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
- I2C_FUNC_SMBUS_WORD_DATA))
- return -ENODEV;
-
- cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
- config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
- manid = i2c_smbus_read_word_swapped(client, JC42_REG_MANID);
- devid = i2c_smbus_read_word_swapped(client, JC42_REG_DEVICEID);
-
- if (cap < 0 || config < 0 || manid < 0 || devid < 0)
- return -ENODEV;
-
- if ((cap & 0xff00) || (config & 0xf800))
- return -ENODEV;
-
- for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
- struct jc42_chips *chip = &jc42_chips[i];
- if (manid == chip->manid &&
- (devid & chip->devid_mask) == chip->devid) {
- strlcpy(info->type, "jc42", I2C_NAME_SIZE);
- return 0;
- }
- }
- return -ENODEV;
-}
-
-static int jc42_probe(struct i2c_client *client, const struct i2c_device_id *id)
-{
- struct jc42_data *data;
- int config, cap, err;
- struct device *dev = &client->dev;
-
- data = devm_kzalloc(dev, sizeof(struct jc42_data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- i2c_set_clientdata(client, data);
- mutex_init(&data->update_lock);
-
- cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
- if (cap < 0)
- return cap;
-
- data->extended = !!(cap & JC42_CAP_RANGE);
-
- config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
- if (config < 0)
- return config;
-
- data->orig_config = config;
- if (config & JC42_CFG_SHUTDOWN) {
- config &= ~JC42_CFG_SHUTDOWN;
- i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, config);
- }
- data->config = config;
-
- /* Register sysfs hooks */
- err = sysfs_create_group(&dev->kobj, &jc42_group);
- if (err)
- return err;
-
- data->hwmon_dev = hwmon_device_register(dev);
- if (IS_ERR(data->hwmon_dev)) {
- err = PTR_ERR(data->hwmon_dev);
- goto exit_remove;
- }
-
- return 0;
-
-exit_remove:
- sysfs_remove_group(&dev->kobj, &jc42_group);
- return err;
-}
-
-static int jc42_remove(struct i2c_client *client)
-{
- struct jc42_data *data = i2c_get_clientdata(client);
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &jc42_group);
- if (data->config != data->orig_config)
- i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG,
- data->orig_config);
- return 0;
-}
-
-static struct jc42_data *jc42_update_device(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct jc42_data *data = i2c_get_clientdata(client);
- struct jc42_data *ret = data;
- int val;
-
- mutex_lock(&data->update_lock);
-
- if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
- val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP);
- if (val < 0) {
- ret = ERR_PTR(val);
- goto abort;
- }
- data->temp_input = val;
-
- val = i2c_smbus_read_word_swapped(client,
- JC42_REG_TEMP_CRITICAL);
- if (val < 0) {
- ret = ERR_PTR(val);
- goto abort;
- }
- data->temp_crit = val;
-
- val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_LOWER);
- if (val < 0) {
- ret = ERR_PTR(val);
- goto abort;
- }
- data->temp_min = val;
-
- val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_UPPER);
- if (val < 0) {
- ret = ERR_PTR(val);
- goto abort;
- }
- data->temp_max = val;
-
- data->last_updated = jiffies;
- data->valid = true;
- }
-abort:
- mutex_unlock(&data->update_lock);
- return ret;
-}
-
-module_i2c_driver(jc42_driver);
-
-MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
-MODULE_DESCRIPTION("JC42 driver");
-MODULE_LICENSE("GPL");