diff options
Diffstat (limited to 'drivers/hwmon/it87.c')
| -rw-r--r-- | drivers/hwmon/it87.c | 62 |
1 files changed, 49 insertions, 13 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c index 316b64823f7..d912649fac5 100644 --- a/drivers/hwmon/it87.c +++ b/drivers/hwmon/it87.c @@ -77,15 +77,13 @@ static struct platform_device *pdev; #define DEVID 0x20 /* Register: Device ID */ #define DEVREV 0x22 /* Register: Device Revision */ -static inline int -superio_inb(int reg) +static inline int superio_inb(int reg) { outb(reg, REG); return inb(VAL); } -static inline void -superio_outb(int reg, int val) +static inline void superio_outb(int reg, int val) { outb(reg, REG); outb(val, VAL); @@ -101,27 +99,32 @@ static int superio_inw(int reg) return val; } -static inline void -superio_select(int ldn) +static inline void superio_select(int ldn) { outb(DEV, REG); outb(ldn, VAL); } -static inline void -superio_enter(void) +static inline int superio_enter(void) { + /* + * Try to reserve REG and REG + 1 for exclusive access. + */ + if (!request_muxed_region(REG, 2, DRVNAME)) + return -EBUSY; + outb(0x87, REG); outb(0x01, REG); outb(0x55, REG); outb(0x55, REG); + return 0; } -static inline void -superio_exit(void) +static inline void superio_exit(void) { outb(0x02, REG); outb(0x02, VAL); + release_region(REG, 2); } /* Logical device 4 registers */ @@ -1169,6 +1172,32 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, struct it87_data *data = it87_update_device(dev); return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); } + +static ssize_t clear_intrusion(struct device *dev, struct device_attribute + *attr, const char *buf, size_t count) +{ + struct it87_data *data = dev_get_drvdata(dev); + long val; + int config; + + if (strict_strtol(buf, 10, &val) < 0 || val != 0) + return -EINVAL; + + mutex_lock(&data->update_lock); + config = it87_read_value(data, IT87_REG_CONFIG); + if (config < 0) { + count = config; + } else { + config |= 1 << 5; + it87_write_value(data, IT87_REG_CONFIG, config); + /* Invalidate cache to force re-read */ + data->valid = 0; + } + mutex_unlock(&data->update_lock); + + return count; +} + static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9); static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10); @@ -1185,6 +1214,8 @@ static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6); static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16); static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17); static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18); +static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, + show_alarm, clear_intrusion, 4); static ssize_t show_beep(struct device *dev, struct device_attribute *attr, char *buf) @@ -1347,6 +1378,7 @@ static struct attribute *it87_attributes[] = { &sensor_dev_attr_temp3_alarm.dev_attr.attr, &dev_attr_alarms.attr, + &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, &dev_attr_name.attr, NULL }; @@ -1535,18 +1567,22 @@ static struct attribute *it87_attributes_label[] = { }; static const struct attribute_group it87_group_label = { - .attrs = it87_attributes_vid, + .attrs = it87_attributes_label, }; /* SuperIO detection - will change isa_address if a chip is found */ static int __init it87_find(unsigned short *address, struct it87_sio_data *sio_data) { - int err = -ENODEV; + int err; u16 chip_type; const char *board_vendor, *board_name; - superio_enter(); + err = superio_enter(); + if (err) + return err; + + err = -ENODEV; chip_type = force_id ? force_id : superio_inw(DEVID); switch (chip_type) { |