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

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author	Nick Kossifidis <mickflemm@gmail.com>	2011-06-01 20:09:48 -0400
committer	John W. Linville <linville@tuxdriver.com>	2011-06-03 14:19:49 -0400
commit	a99168eece601d2a79ecfcb968ce226f2f30cf98 (patch)
tree	01598dfa43a08038f9b33cdae902f71156647471 /include/linux/init_task.h
parent	bdf492f502ad4f646e9905db1b89e11822826edd (diff)

ath5k: Disable fast channel switching by default

Disable fast channel change by default on AR2413/AR5413 due to some bug reports (it still works for me but it's better to be safe). Add a module parameter "fastchanswitch" in case anyone wants to enable it and play with it. Signed-off-by: Nick Kossifidis <mickflemm@gmail.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>

Diffstat (limited to 'include/linux/init_task.h')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com> * * The LM95241 is a sensor chip made by National Semiconductors. * It reports up to three temperatures (its own plus up to two external ones). * Complete datasheet can be obtained from National's website at: * http://www.national.com/ds.cgi/LM/LM95241.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> #define DEVNAME "lm95241" static const unsigned short normal_i2c[] = { 0x19, 0x2a, 0x2b, I2C_CLIENT_END }; /* LM95241 registers */ #define LM95241_REG_R_MAN_ID 0xFE #define LM95241_REG_R_CHIP_ID 0xFF #define LM95241_REG_R_STATUS 0x02 #define LM95241_REG_RW_CONFIG 0x03 #define LM95241_REG_RW_REM_FILTER 0x06 #define LM95241_REG_RW_TRUTHERM 0x07 #define LM95241_REG_W_ONE_SHOT 0x0F #define LM95241_REG_R_LOCAL_TEMPH 0x10 #define LM95241_REG_R_REMOTE1_TEMPH 0x11 #define LM95241_REG_R_REMOTE2_TEMPH 0x12 #define LM95241_REG_R_LOCAL_TEMPL 0x20 #define LM95241_REG_R_REMOTE1_TEMPL 0x21 #define LM95241_REG_R_REMOTE2_TEMPL 0x22 #define LM95241_REG_RW_REMOTE_MODEL 0x30 /* LM95241 specific bitfields */ #define CFG_STOP 0x40 #define CFG_CR0076 0x00 #define CFG_CR0182 0x10 #define CFG_CR1000 0x20 #define CFG_CR2700 0x30 #define R1MS_SHIFT 0 #define R2MS_SHIFT 2 #define R1MS_MASK (0x01 << (R1MS_SHIFT)) #define R2MS_MASK (0x01 << (R2MS_SHIFT)) #define R1DF_SHIFT 1 #define R2DF_SHIFT 2 #define R1DF_MASK (0x01 << (R1DF_SHIFT)) #define R2DF_MASK (0x01 << (R2DF_SHIFT)) #define R1FE_MASK 0x01 #define R2FE_MASK 0x05 #define TT1_SHIFT 0 #define TT2_SHIFT 4 #define TT_OFF 0 #define TT_ON 1 #define TT_MASK 7 #define NATSEMI_MAN_ID 0x01 #define LM95231_CHIP_ID 0xA1 #define LM95241_CHIP_ID 0xA4 static const u8 lm95241_reg_address[] = { LM95241_REG_R_LOCAL_TEMPH, LM95241_REG_R_LOCAL_TEMPL, LM95241_REG_R_REMOTE1_TEMPH, LM95241_REG_R_REMOTE1_TEMPL, LM95241_REG_R_REMOTE2_TEMPH, LM95241_REG_R_REMOTE2_TEMPL }; /* Client data (each client gets its own) */ struct lm95241_data { struct device *hwmon_dev; struct mutex update_lock; unsigned long last_updated, interval; /* in jiffies */ char valid; /* zero until following fields are valid */ /* registers values */ u8 temp[ARRAY_SIZE(lm95241_reg_address)]; u8 config, model, trutherm; }; /* Conversions */ static int temp_from_reg_signed(u8 val_h, u8 val_l) { s16 val_hl = (val_h << 8) | val_l; return val_hl * 1000 / 256; } static int temp_from_reg_unsigned(u8 val_h, u8 val_l) { u16 val_hl = (val_h << 8) | val_l; return val_hl * 1000 / 256; } static struct lm95241_data *lm95241_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + data->interval) || !data->valid) { int i; dev_dbg(&client->dev, "Updating lm95241 data.\n"); for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++) data->temp[i] = i2c_smbus_read_byte_data(client, lm95241_reg_address[i]); data->last_updated = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; } /* Sysfs stuff */ static ssize_t show_input(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95241_data *data = lm95241_update_device(dev); int index = to_sensor_dev_attr(attr)->index; return snprintf(buf, PAGE_SIZE - 1, "%d\n", index == 0 || (data->config & (1 << (index / 2))) ? temp_from_reg_signed(data->temp[index], data->temp[index + 1]) : temp_from_reg_unsigned(data->temp[index], data->temp[index + 1])); } static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); return snprintf(buf, PAGE_SIZE - 1, data->model & to_sensor_dev_attr(attr)->index ? "1\n" : "2\n"); } static ssize_t set_type(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); unsigned long val; int shift; u8 mask = to_sensor_dev_attr(attr)->index; if (kstrtoul(buf, 10, &val) < 0) return -EINVAL; if (val != 1 && val != 2) return -EINVAL; shift = mask == R1MS_MASK ? TT1_SHIFT : TT2_SHIFT; mutex_lock(&data->update_lock); data->trutherm &= ~(TT_MASK << shift); if (val == 1) { data->model |= mask; data->trutherm |= (TT_ON << shift); } else { data->model &= ~mask; data->trutherm |= (TT_OFF << shift); } data->valid = 0; i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, data->model); i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, data->trutherm); mutex_unlock(&data->update_lock); return count; } static ssize_t show_min(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); return snprintf(buf, PAGE_SIZE - 1, data->config & to_sensor_dev_attr(attr)->index ? "-127000\n" : "0\n"); } static ssize_t set_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); long val; if (kstrtol(buf, 10, &val) < 0) return -EINVAL; if (val < -128000) return -EINVAL; mutex_lock(&data->update_lock); if (val < 0) data->config |= to_sensor_dev_attr(attr)->index; else data->config &= ~to_sensor_dev_attr(attr)->index; data->valid = 0; i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config); mutex_unlock(&data->update_lock); return count; } static ssize_t show_max(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); return snprintf(buf, PAGE_SIZE - 1, data->config & to_sensor_dev_attr(attr)->index ? "127000\n" : "255000\n"); } static ssize_t set_max(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); long val; if (kstrtol(buf, 10, &val) < 0) return -EINVAL; if (val >= 256000) return -EINVAL; mutex_lock(&data->update_lock); if (val <= 127000) data->config |= to_sensor_dev_attr(attr)->index; else data->config &= ~to_sensor_dev_attr(attr)->index; data->valid = 0; i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config); mutex_unlock(&data->update_lock); return count; } static ssize_t show_interval(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95241_data *data = lm95241_update_device(dev); return snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->interval / HZ); } static ssize_t set_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); unsigned long val; if (kstrtoul(buf, 10, &val) < 0) return -EINVAL; data->interval = val * HZ / 1000; return count; } static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2); static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_input, NULL, 4); static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type,


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