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

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author	Linus Torvalds <torvalds@linux-foundation.org>	2010-06-27 14:28:02 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2010-06-27 14:28:02 -0400
commit	31cafd958932a90174118ad062fdc37ffb6bf31c (patch)
tree	21f04c11d9e759c1f65cfaa1e4fbd79ee1e60753 /net/unix/af_unix.c
parent	e7865c234fff2db474f21a62b2f906a70317c972 (diff)
parent	e2f5b04563786d4b7d7648868de7e941a0649372 (diff)

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (52 commits) phylib: Add autoload support for the LXT973 phy. ISDN: hysdn, fix potential NULL dereference vxge: fix memory leak in vxge_alloc_msix() error path isdn/gigaset: correct CAPI connection state storage isdn/gigaset: encode HLC and BC together isdn/gigaset: correct CAPI DATA_B3 Delivery Confirmation isdn/gigaset: correct CAPI voice connection encoding isdn/gigaset: honor CAPI application's buffer size request cpmac: do not leak struct net_device on phy_connect errors smc91c92_cs: fix the problem that lan & modem does not work simultaneously ipv6: fix NULL reference in proxy neighbor discovery Bluetooth: Bring back var 'i' increment xfrm: check bundle policy existance before dereferencing it sky2: enable rx/tx in sky2_phy_reinit() cnic: Disable statistics initialization for eth clients that do not support statistics net: add dependency on fw class module to qlcnic and netxen_nic snmp: fix SNMP_ADD_STATS() hso: remove setting of low_latency flag udp: Fix bogus UFO packet generation lasi82596: fix netdev_mc_count conversion ...

Diffstat (limited to 'net/unix/af_unix.c')

0 files changed, 0 insertions, 0 deletions

/* * adt7x10.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * This driver handles the ADT7410 and compatible digital temperature sensors. * Hartmut Knaack <knaack.h@gmx.de> 2012-07-22 * based on lm75.c by Frodo Looijaard <frodol@dds.nl> * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.com> * * 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/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/interrupt.h> #include "adt7x10.h" /* * ADT7X10 status */ #define ADT7X10_STAT_T_LOW (1 << 4) #define ADT7X10_STAT_T_HIGH (1 << 5) #define ADT7X10_STAT_T_CRIT (1 << 6) #define ADT7X10_STAT_NOT_RDY (1 << 7) /* * ADT7X10 config */ #define ADT7X10_FAULT_QUEUE_MASK (1 << 0 | 1 << 1) #define ADT7X10_CT_POLARITY (1 << 2) #define ADT7X10_INT_POLARITY (1 << 3) #define ADT7X10_EVENT_MODE (1 << 4) #define ADT7X10_MODE_MASK (1 << 5 | 1 << 6) #define ADT7X10_FULL (0 << 5 | 0 << 6) #define ADT7X10_PD (1 << 5 | 1 << 6) #define ADT7X10_RESOLUTION (1 << 7) /* * ADT7X10 masks */ #define ADT7X10_T13_VALUE_MASK 0xFFF8 #define ADT7X10_T_HYST_MASK 0xF /* straight from the datasheet */ #define ADT7X10_TEMP_MIN (-55000) #define ADT7X10_TEMP_MAX 150000 /* Each client has this additional data */ struct adt7x10_data { const struct adt7x10_ops *ops; const char *name; struct device *hwmon_dev; struct mutex update_lock; u8 config; u8 oldconfig; bool valid; /* true if registers valid */ unsigned long last_updated; /* In jiffies */ s16 temp[4]; /* Register values, 0 = input 1 = high 2 = low 3 = critical */ u8 hyst; /* hysteresis offset */ }; static int adt7x10_read_byte(struct device *dev, u8 reg) { struct adt7x10_data *d = dev_get_drvdata(dev); return d->ops->read_byte(dev, reg); } static int adt7x10_write_byte(struct device *dev, u8 reg, u8 data) { struct adt7x10_data *d = dev_get_drvdata(dev); return d->ops->write_byte(dev, reg, data); } static int adt7x10_read_word(struct device *dev, u8 reg) { struct adt7x10_data *d = dev_get_drvdata(dev); return d->ops->read_word(dev, reg); } static int adt7x10_write_word(struct device *dev, u8 reg, u16 data) { struct adt7x10_data *d = dev_get_drvdata(dev); return d->ops->write_word(dev, reg, data); } static const u8 ADT7X10_REG_TEMP[4] = { ADT7X10_TEMPERATURE, /* input */ ADT7X10_T_ALARM_HIGH, /* high */ ADT7X10_T_ALARM_LOW, /* low */ ADT7X10_T_CRIT, /* critical */ }; static irqreturn_t adt7x10_irq_handler(int irq, void *private) { struct device *dev = private; int status; status = adt7x10_read_byte(dev, ADT7X10_STATUS); if (status < 0) return IRQ_HANDLED; if (status & ADT7X10_STAT_T_HIGH) sysfs_notify(&dev->kobj, NULL, "temp1_max_alarm"); if (status & ADT7X10_STAT_T_LOW) sysfs_notify(&dev->kobj, NULL, "temp1_min_alarm"); if (status & ADT7X10_STAT_T_CRIT) sysfs_notify(&dev->kobj, NULL, "temp1_crit_alarm"); return IRQ_HANDLED; } static int adt7x10_temp_ready(struct device *dev) { int i, status; for (i = 0; i < 6; i++) { status = adt7x10_read_byte(dev, ADT7X10_STATUS); if (status < 0) return status; if (!(status & ADT7X10_STAT_NOT_RDY)) return 0; msleep(60); } return -ETIMEDOUT; } static int adt7x10_update_temp(struct device *dev) { struct adt7x10_data *data = dev_get_drvdata(dev); int ret = 0; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || !data->valid) { int temp; dev_dbg(dev, "Starting update\n"); ret = adt7x10_temp_ready(dev); /* check for new value */ if (ret) goto abort; temp = adt7x10_read_word(dev, ADT7X10_REG_TEMP[0]); if (temp < 0) { ret = temp; dev_dbg(dev, "Failed to read value: reg %d, error %d\n", ADT7X10_REG_TEMP[0], ret); goto abort; } data->temp[0] = temp; data->last_updated = jiffies; data->valid = true; } abort: mutex_unlock(&data->update_lock); return ret; } static int adt7x10_fill_cache(struct device *dev) { struct adt7x10_data *data = dev_get_drvdata(dev); int ret; int i; for (i = 1; i < ARRAY_SIZE(data->temp); i++) { ret = adt7x10_read_word(dev, ADT7X10_REG_TEMP[i]); if (ret < 0) { dev_dbg(dev, "Failed to read value: reg %d, error %d\n", ADT7X10_REG_TEMP[i], ret); return ret; } data->temp[i] = ret; } ret = adt7x10_read_byte(dev, ADT7X10_T_HYST); if (ret < 0) { dev_dbg(dev, "Failed to read value: reg %d, error %d\n", ADT7X10_T_HYST, ret); return ret; } data->hyst = ret; return 0; } static s16 ADT7X10_TEMP_TO_REG(long temp) { return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX) * 128, 1000); } static int ADT7X10_REG_TO_TEMP(struct adt7x10_data *data, s16 reg) { /* in 13 bit mode, bits 0-2 are status flags - mask them out */ if (!(data->config & ADT7X10_RESOLUTION)) reg &= ADT7X10_T13_VALUE_MASK; /* * temperature is stored in twos complement format, in steps of * 1/128°C */ return DIV_ROUND_CLOSEST(reg * 1000, 128); } /*-----------------------------------------------------------------------*/ /* sysfs attributes for hwmon */ static ssize_t adt7x10_temp_show(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct adt7x10_data *data = dev_get_drvdata(dev); if (attr->index == 0) { int ret; ret = adt7x10_update_temp(dev); if (ret) return ret; } return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, data->temp[attr->index])); } static ssize_t adt7x10_temp_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct adt7x10_data *data = dev_get_drvdata(dev); int nr = attr->index; long temp; int ret; ret = kstrtol(buf, 10, &temp); if (ret) return ret; mutex_lock(&data->update_lock); data->temp[nr] = ADT7X10_TEMP_TO_REG(temp); ret = adt7x10_write_word(dev, ADT7X10_REG_TEMP[nr], data->temp[nr]); if (ret) count = ret; mutex_unlock(&data->update_lock); return count; } static ssize_t adt7x10_t_hyst_show(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct adt7x10_data *data = dev_get_drvdata(dev); int nr = attr->index; int hyst; hyst = (data->hyst & ADT7X10_T_HYST_MASK) * 1000; /* * hysteresis is stored as a 4 bit offset in the device, convert it * to an absolute value */ if (nr == 2) /* min has positive offset, others have negative */ hyst = -hyst; return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, data->temp[nr]) - hyst); } static ssize_t adt7x10_t_hyst_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct adt7x10_data *data = dev_get_drvdata(dev); int limit, ret; long hyst; ret = kstrtol(buf, 10, &hyst); if (ret) return ret; /* convert absolute hysteresis value to a 4 bit delta value */ limit = ADT7X10_REG_TO_TEMP(data, data->temp[1]); hyst = clamp_val(hyst, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX); data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), 0, ADT7X10_T_HYST_MASK); ret = adt7x10_write_byte(dev, ADT7X10_T_HYST, data->hyst); if (ret) return ret; return count; } static ssize_t adt7x10_alarm_show(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); int ret; ret = adt7x10_read_byte(dev, ADT7X10_STATUS); if (ret < 0) return ret; return sprintf(buf, "%d\n", !!(ret & attr->index)); } static ssize_t name_show(struct device *dev, struct device_attribute *da, char *buf) { struct adt7x10_data *data = dev_get_drvdata(dev); return sprintf(buf, "%s\n", data->name); } static SENSOR_DEVICE_ATTR_RO(temp1_input, adt7x10_temp, 0); static SENSOR_DEVICE_ATTR_RW(temp1_max, adt7x10_temp, 1); static SENSOR_DEVICE_ATTR_RW(temp1_min, adt7x10_temp, 2); static SENSOR_DEVICE_ATTR_RW(temp1_crit, adt7x10_temp, 3); static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, adt7x10_t_hyst, 1); static SENSOR_DEVICE_ATTR_RO(temp1_min_hyst, adt7x10_t_hyst, 2); static SENSOR_DEVICE_ATTR_RO(temp1_crit_hyst, adt7x10_t_hyst, 3); static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, adt7x10_alarm, ADT7X10_STAT_T_LOW); static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, adt7x10_alarm, ADT7X10_STAT_T_HIGH); static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, adt7x10_alarm, ADT7X10_STAT_T_CRIT); static DEVICE_ATTR_RO(name); static struct attribute *adt7x10_attributes[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp1_min_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 adt7x10_group = { .attrs = adt7x10_attributes, }; int adt7x10_probe(struct device *dev, const char *name, int irq,


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