litmus-rt.git - The LITMUS^RT kernel.

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author	Linus Torvalds <torvalds@g5.osdl.org>	2005-09-24 16:50:35 -0400
committer	Linus Torvalds <torvalds@g5.osdl.org>	2005-09-24 16:50:35 -0400
commit	ef6bd6eb90ad72ee8ee7ba8b271f27102e9a90c1 (patch)
tree	6e391d595c78b59396f6ae9e9fb322325ec9a9fe /include/linux/compiler-gcc.h
parent	2e55b57a6000ff05f6aadcddf204ecb42749a332 (diff)
parent	6b9ea4213e3a9c9b8de29a001a2b8d8799cbc1c9 (diff)

Merge master.kernel.org:/home/rmk/linux-2.6-ucb

Diffstat (limited to 'include/linux/compiler-gcc.h')

0 files changed, 0 insertions, 0 deletions

/* * max1619.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * Copyright (C) 2003-2004 Alexey Fisher <fishor@mail.ru> * Jean Delvare <khali@linux-fr.org> * * Based on the lm90 driver. The MAX1619 is a sensor chip made by Maxim. * It reports up to two temperatures (its own plus up to * one external one). Complete datasheet can be * obtained from Maxim's website at: * http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf * * 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> #include <linux/sysfs.h> static const unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; /* * The MAX1619 registers */ #define MAX1619_REG_R_MAN_ID 0xFE #define MAX1619_REG_R_CHIP_ID 0xFF #define MAX1619_REG_R_CONFIG 0x03 #define MAX1619_REG_W_CONFIG 0x09 #define MAX1619_REG_R_CONVRATE 0x04 #define MAX1619_REG_W_CONVRATE 0x0A #define MAX1619_REG_R_STATUS 0x02 #define MAX1619_REG_R_LOCAL_TEMP 0x00 #define MAX1619_REG_R_REMOTE_TEMP 0x01 #define MAX1619_REG_R_REMOTE_HIGH 0x07 #define MAX1619_REG_W_REMOTE_HIGH 0x0D #define MAX1619_REG_R_REMOTE_LOW 0x08 #define MAX1619_REG_W_REMOTE_LOW 0x0E #define MAX1619_REG_R_REMOTE_CRIT 0x10 #define MAX1619_REG_W_REMOTE_CRIT 0x12 #define MAX1619_REG_R_TCRIT_HYST 0x11 #define MAX1619_REG_W_TCRIT_HYST 0x13 /* * Conversions */ static int temp_from_reg(int val) { return (val & 0x80 ? val-0x100 : val) * 1000; } static int temp_to_reg(int val) { return (val < 0 ? val+0x100*1000 : val) / 1000; } /* * Functions declaration */ static int max1619_probe(struct i2c_client *client, const struct i2c_device_id *id); static int max1619_detect(struct i2c_client *client, struct i2c_board_info *info); static void max1619_init_client(struct i2c_client *client); static int max1619_remove(struct i2c_client *client); static struct max1619_data *max1619_update_device(struct device *dev); /* * Driver data (common to all clients) */ static const struct i2c_device_id max1619_id[] = { { "max1619", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, max1619_id); static struct i2c_driver max1619_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "max1619", }, .probe = max1619_probe, .remove = max1619_remove, .id_table = max1619_id, .detect = max1619_detect, .address_list = normal_i2c, }; /* * Client data (each client gets its own) */ struct max1619_data { struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ /* registers values */ u8 temp_input1; /* local */ u8 temp_input2, temp_low2, temp_high2; /* remote */ u8 temp_crit2; u8 temp_hyst2; u8 alarms; }; /* * Sysfs stuff */ #define show_temp(value) \ static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \ { \ struct max1619_data *data = max1619_update_device(dev); \ return sprintf(buf, "%d\n", temp_from_reg(data->value)); \ } show_temp(temp_input1); show_temp(temp_input2); show_temp(temp_low2); show_temp(temp_high2); show_temp(temp_crit2); show_temp(temp_hyst2); #define set_temp2(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 max1619_data *data = i2c_get_clientdata(client); \ long val = simple_strtol(buf, NULL, 10); \ \ mutex_lock(&data->update_lock); \ data->value = temp_to_reg(val); \ i2c_smbus_write_byte_data(client, reg, data->value); \ mutex_unlock(&data->update_lock); \ return count; \ } set_temp2(temp_low2, MAX1619_REG_W_REMOTE_LOW); set_temp2(temp_high2, MAX1619_REG_W_REMOTE_HIGH); set_temp2(temp_crit2, MAX1619_REG_W_REMOTE_CRIT); set_temp2(temp_hyst2, MAX1619_REG_W_TCRIT_HYST); static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { struct max1619_data *data = max1619_update_device(dev); return sprintf(buf, "%d\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 max1619_data *data = max1619_update_device(dev); return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); } static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL); static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_low2, set_temp_low2); static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_high2, set_temp_high2); static DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit2, set_temp_crit2); static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp_hyst2, set_temp_hyst2); static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); static struct attribute *max1619_attributes[] = { &dev_attr_temp1_input.attr, &dev_attr_temp2_input.attr, &dev_attr_temp2_min.attr, &dev_attr_temp2_max.attr, &dev_attr_temp2_crit.attr, &dev_attr_temp2_crit_hyst.attr, &dev_attr_alarms.attr, &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, NULL }; static const struct attribute_group max1619_group = { .attrs = max1619_attributes, }; /* * Real code */ /* Return 0 if detection is successful, -ENODEV otherwise */ static int max1619_detect(struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; u8 reg_config, reg_convrate, reg_status, man_id, chip_id; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; /* detection */ reg_config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG); reg_convrate = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONVRATE); reg_status = i2c_smbus_read_byte_data(client, MAX1619_REG_R_STATUS); if ((reg_config & 0x03) != 0x00 || reg_convrate > 0x07 || (reg_status & 0x61) != 0x00) { dev_dbg(&adapter->dev, "MAX1619 detection failed at 0x%02x\n", client->addr); return -ENODEV; } /* identification */ man_id = i2c_smbus_read_byte_data(client, MAX1619_REG_R_MAN_ID); chip_id = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CHIP_ID); if (man_id != 0x4D || chip_id != 0x04) { dev_info(&adapter->dev, "Unsupported chip (man_id=0x%02X, chip_id=0x%02X).\n", man_id, chip_id); return -ENODEV; } strlcpy(info->type, "max1619", I2C_NAME_SIZE); return 0; } static int max1619_probe(struct i2c_client *new_client, const struct i2c_device_id *id) { struct max1619_data *data; int err; data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL); if (!data) { err = -ENOMEM; goto exit; } i2c_set_clientdata(new_client, data); data->valid = 0; mutex_init(&data->update_lock); /* Initialize the MAX1619 chip */ max1619_init_client(new_client); /* Register sysfs hooks */ if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group))) goto exit_free; data->hwmon_dev = hwmon_device_register(&new_client->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove_files; } return 0; exit_remove_files: sysfs_remove_group(&new_client->dev.kobj, &max1619_group); exit_free: kfree(data); exit: return err; } static void max1619_init_client(struct i2c_client *client) { u8 config; /* * Start the conversions. */ i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONVRATE, 5); /* 2 Hz */ config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG); if (config & 0x40) i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONFIG, config & 0xBF); /* run */ } static int max1619_remove(struct i2c_client *client) { struct max1619_data *data = i2c_get_clientdata(client); hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &max1619_group); kfree(data); return 0; } static struct max1619_data *max1619_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct max1619_data *data = i2c_get_clientdata(client); mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { dev_dbg(&client->dev, "Updating max1619 data.\n"); data->temp_input1 = i2c_smbus_read_byte_data(client, MAX1619_REG_R_LOCAL_TEMP); data->temp_input2 = i2c_smbus_read_byte_data(client, MAX1619_REG_R_REMOTE_TEMP); data->temp_high2 = i2c_smbus_read_byte_data(client, MAX1619_REG_R_REMOTE_HIGH); data->temp_low2 = i2c_smbus_read_byte_data(client, MAX1619_REG_R_REMOTE_LOW); data->temp_crit2 = i2c_smbus_read_byte_data(client, MAX1619_REG_R_REMOTE_CRIT); data->temp_hyst2 = i2c_smbus_read_byte_data(client, MAX1619_REG_R_TCRIT_HYST); data->alarms = i2c_smbus_read_byte_data(client,


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