hwmon: (w83791d) new sysfs beep/alarm methodology
Add new sysfs alarm methodology to w83791d driver Signed-off-by: Charles Spirakis <bezaur@gmail.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>hifive-unleashed-5.1
Charles Spirakis
Mark M. Hoffman
parent
7b6d1f044d
commit
6438312367
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@ -75,46 +75,64 @@ Voltage sensors (also known as IN sensors) report their values in millivolts.
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An alarm is triggered if the voltage has crossed a programmable minimum
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or maximum limit.
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The bit ordering for the alarm "realtime status register" and the
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"beep enable registers" are different.
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The w83791d has a global bit used to enable beeping from the speaker when an
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alarm is triggered as well as a bitmask to enable or disable the beep for
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specific alarms. You need both the global beep enable bit and the
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corresponding beep bit to be on for a triggered alarm to sound a beep.
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in0 (VCORE) : alarms: 0x000001 beep_enable: 0x000001
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in1 (VINR0) : alarms: 0x000002 beep_enable: 0x002000 <== mismatch
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in2 (+3.3VIN): alarms: 0x000004 beep_enable: 0x000004
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in3 (5VDD) : alarms: 0x000008 beep_enable: 0x000008
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in4 (+12VIN) : alarms: 0x000100 beep_enable: 0x000100
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in5 (-12VIN) : alarms: 0x000200 beep_enable: 0x000200
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in6 (-5VIN) : alarms: 0x000400 beep_enable: 0x000400
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in7 (VSB) : alarms: 0x080000 beep_enable: 0x010000 <== mismatch
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in8 (VBAT) : alarms: 0x100000 beep_enable: 0x020000 <== mismatch
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in9 (VINR1) : alarms: 0x004000 beep_enable: 0x004000
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temp1 : alarms: 0x000010 beep_enable: 0x000010
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temp2 : alarms: 0x000020 beep_enable: 0x000020
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temp3 : alarms: 0x002000 beep_enable: 0x000002 <== mismatch
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fan1 : alarms: 0x000040 beep_enable: 0x000040
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fan2 : alarms: 0x000080 beep_enable: 0x000080
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fan3 : alarms: 0x000800 beep_enable: 0x000800
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fan4 : alarms: 0x200000 beep_enable: 0x200000
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fan5 : alarms: 0x400000 beep_enable: 0x400000
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tart1 : alarms: 0x010000 beep_enable: 0x040000 <== mismatch
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tart2 : alarms: 0x020000 beep_enable: 0x080000 <== mismatch
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tart3 : alarms: 0x040000 beep_enable: 0x100000 <== mismatch
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case_open : alarms: 0x001000 beep_enable: 0x001000
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user_enable : alarms: -------- beep_enable: 0x800000
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The sysfs interface to the gloabal enable is via the sysfs beep_enable file.
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This file is used for both legacy and new code.
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*** NOTE: It is the responsibility of user-space code to handle the fact
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that the beep enable and alarm bits are in different positions when using that
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feature of the chip.
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The sysfs interface to the beep bitmask has migrated from the original legacy
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method of a single sysfs beep_mask file to a newer method using multiple
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*_beep files as described in .../Documentation/hwmon/sysfs-interface.
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When an alarm goes off, you can be warned by a beeping signal through your
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computer speaker. It is possible to enable all beeping globally, or only
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the beeping for some alarms.
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A similar change has occured for the bitmap corresponding to the alarms. The
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original legacy method used a single sysfs alarms file containing a bitmap
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of triggered alarms. The newer method uses multiple sysfs *_alarm files
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(again following the pattern described in sysfs-interface).
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The driver only reads the chip values each 3 seconds; reading them more
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often will do no harm, but will return 'old' values.
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Since both methods read and write the underlying hardware, they can be used
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interchangeably and changes in one will automatically be reflected by
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the other. If you use the legacy bitmask method, your user-space code is
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responsible for handling the fact that the alarms and beep_mask bitmaps
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are not the same (see the table below).
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NOTE: All new code should be written to use the newer sysfs-interface
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specification as that avoids bitmap problems and is the preferred interface
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going forward.
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The driver reads the hardware chip values at most once every three seconds.
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User mode code requesting values more often will receive cached values.
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Alarms bitmap vs. beep_mask bitmask
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------------------------------------
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For legacy code using the alarms and beep_mask files:
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in0 (VCORE) : alarms: 0x000001 beep_mask: 0x000001
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in1 (VINR0) : alarms: 0x000002 beep_mask: 0x002000 <== mismatch
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in2 (+3.3VIN): alarms: 0x000004 beep_mask: 0x000004
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in3 (5VDD) : alarms: 0x000008 beep_mask: 0x000008
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in4 (+12VIN) : alarms: 0x000100 beep_mask: 0x000100
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in5 (-12VIN) : alarms: 0x000200 beep_mask: 0x000200
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in6 (-5VIN) : alarms: 0x000400 beep_mask: 0x000400
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in7 (VSB) : alarms: 0x080000 beep_mask: 0x010000 <== mismatch
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in8 (VBAT) : alarms: 0x100000 beep_mask: 0x020000 <== mismatch
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in9 (VINR1) : alarms: 0x004000 beep_mask: 0x004000
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temp1 : alarms: 0x000010 beep_mask: 0x000010
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temp2 : alarms: 0x000020 beep_mask: 0x000020
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temp3 : alarms: 0x002000 beep_mask: 0x000002 <== mismatch
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fan1 : alarms: 0x000040 beep_mask: 0x000040
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fan2 : alarms: 0x000080 beep_mask: 0x000080
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fan3 : alarms: 0x000800 beep_mask: 0x000800
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fan4 : alarms: 0x200000 beep_mask: 0x200000
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fan5 : alarms: 0x400000 beep_mask: 0x400000
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tart1 : alarms: 0x010000 beep_mask: 0x040000 <== mismatch
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tart2 : alarms: 0x020000 beep_mask: 0x080000 <== mismatch
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tart3 : alarms: 0x040000 beep_mask: 0x100000 <== mismatch
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case_open : alarms: 0x001000 beep_mask: 0x001000
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global_enable: alarms: -------- beep_mask: 0x800000 (modified via beep_enable)
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W83791D TODO:
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---------------
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Provide a patch for per-file alarms and beep enables as defined in the hwmon
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documentation (Documentation/hwmon/sysfs-interface)
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Provide a patch for smart-fan control (still need appropriate motherboard/fans)
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@ -4106,7 +4106,7 @@ W83791D HARDWARE MONITORING DRIVER
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P: Charles Spirakis
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M: bezaur@gmail.com
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L: lm-sensors@lm-sensors.org
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S: Maintained
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S: Odd Fixes
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W83793 HARDWARE MONITORING DRIVER
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P: Rudolf Marek
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@ -2,7 +2,7 @@
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w83791d.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (C) 2006 Charles Spirakis <bezaur@gmail.com>
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Copyright (C) 2006-2007 Charles Spirakis <bezaur@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -384,6 +384,85 @@ static struct sensor_device_attribute sda_in_max[] = {
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SENSOR_ATTR(in9_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 9),
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};
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static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr =
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to_sensor_dev_attr(attr);
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struct w83791d_data *data = w83791d_update_device(dev);
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int bitnr = sensor_attr->index;
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return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
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}
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static ssize_t store_beep(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *sensor_attr =
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to_sensor_dev_attr(attr);
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struct i2c_client *client = to_i2c_client(dev);
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struct w83791d_data *data = i2c_get_clientdata(client);
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int bitnr = sensor_attr->index;
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int bytenr = bitnr / 8;
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long val = simple_strtol(buf, NULL, 10) ? 1 : 0;
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mutex_lock(&data->update_lock);
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data->beep_mask &= ~(0xff << (bytenr * 8));
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data->beep_mask |= w83791d_read(client, W83791D_REG_BEEP_CTRL[bytenr])
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<< (bytenr * 8);
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data->beep_mask &= ~(1 << bitnr);
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data->beep_mask |= val << bitnr;
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w83791d_write(client, W83791D_REG_BEEP_CTRL[bytenr],
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(data->beep_mask >> (bytenr * 8)) & 0xff);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr =
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to_sensor_dev_attr(attr);
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struct w83791d_data *data = w83791d_update_device(dev);
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int bitnr = sensor_attr->index;
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return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
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}
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/* Note: The bitmask for the beep enable/disable is different than
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the bitmask for the alarm. */
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static struct sensor_device_attribute sda_in_beep[] = {
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SENSOR_ATTR(in0_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 0),
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SENSOR_ATTR(in1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 13),
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SENSOR_ATTR(in2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 2),
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SENSOR_ATTR(in3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 3),
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SENSOR_ATTR(in4_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 8),
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SENSOR_ATTR(in5_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 9),
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SENSOR_ATTR(in6_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 10),
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SENSOR_ATTR(in7_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 16),
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SENSOR_ATTR(in8_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 17),
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SENSOR_ATTR(in9_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 14),
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};
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static struct sensor_device_attribute sda_in_alarm[] = {
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SENSOR_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0),
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SENSOR_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1),
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SENSOR_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2),
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SENSOR_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3),
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SENSOR_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8),
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SENSOR_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9),
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SENSOR_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10),
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SENSOR_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 19),
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SENSOR_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 20),
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SENSOR_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 14),
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};
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#define show_fan_reg(reg) \
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static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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@ -536,6 +615,22 @@ static struct sensor_device_attribute sda_fan_div[] = {
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show_fan_div, store_fan_div, 4),
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};
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static struct sensor_device_attribute sda_fan_beep[] = {
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SENSOR_ATTR(fan1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 6),
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SENSOR_ATTR(fan2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 7),
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SENSOR_ATTR(fan3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 11),
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SENSOR_ATTR(fan4_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 21),
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SENSOR_ATTR(fan5_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 22),
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};
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static struct sensor_device_attribute sda_fan_alarm[] = {
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SENSOR_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6),
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SENSOR_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7),
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SENSOR_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11),
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SENSOR_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 21),
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SENSOR_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22),
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};
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/* read/write the temperature1, includes measured value and limits */
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static ssize_t show_temp1(struct device *dev, struct device_attribute *devattr,
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char *buf)
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@ -618,6 +713,19 @@ static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
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show_temp23, store_temp23, 1, 2),
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};
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/* Note: The bitmask for the beep enable/disable is different than
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the bitmask for the alarm. */
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static struct sensor_device_attribute sda_temp_beep[] = {
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SENSOR_ATTR(temp1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 4),
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SENSOR_ATTR(temp2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 5),
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SENSOR_ATTR(temp3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 1),
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};
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static struct sensor_device_attribute sda_temp_alarm[] = {
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SENSOR_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4),
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SENSOR_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5),
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SENSOR_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13),
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};
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/* get reatime status of all sensors items: voltage, temp, fan */
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static ssize_t show_alarms_reg(struct device *dev,
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@ -749,17 +857,23 @@ static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
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#define IN_UNIT_ATTRS(X) \
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&sda_in_input[X].dev_attr.attr, \
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&sda_in_min[X].dev_attr.attr, \
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&sda_in_max[X].dev_attr.attr
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&sda_in_max[X].dev_attr.attr, \
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&sda_in_beep[X].dev_attr.attr, \
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&sda_in_alarm[X].dev_attr.attr
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#define FAN_UNIT_ATTRS(X) \
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&sda_fan_input[X].dev_attr.attr, \
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&sda_fan_min[X].dev_attr.attr, \
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&sda_fan_div[X].dev_attr.attr
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&sda_fan_div[X].dev_attr.attr, \
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&sda_fan_beep[X].dev_attr.attr, \
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&sda_fan_alarm[X].dev_attr.attr
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#define TEMP_UNIT_ATTRS(X) \
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&sda_temp_input[X].dev_attr.attr, \
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&sda_temp_max[X].dev_attr.attr, \
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&sda_temp_max_hyst[X].dev_attr.attr
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&sda_temp_max_hyst[X].dev_attr.attr, \
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&sda_temp_beep[X].dev_attr.attr, \
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&sda_temp_alarm[X].dev_attr.attr
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static struct attribute *w83791d_attributes[] = {
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IN_UNIT_ATTRS(0),
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