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-rw-r--r--Documentation/hwmon/it874
-rw-r--r--drivers/hwmon/it87.c122
2 files changed, 126 insertions, 0 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index f9ba96c0ac4..23b773fa267 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -136,6 +136,10 @@ registers are read whenever any data is read (unless it is less than 1.5
seconds since the last update). This means that you can easily miss
once-only alarms.
+Out-of-limit readings can also result in beeping, if the chip is properly
+wired and configured. Beeping can be enabled or disabled per sensor type
+(temperatures, voltages and fans.)
+
The IT87xx only updates its values each 1.5 seconds; reading it more often
will do no harm, but will return 'old' values.
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 7a349e066fd..d70c6ec3172 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -128,6 +128,7 @@ superio_exit(void)
#define IT87_SIO_GPIO5_REG 0x29
#define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
#define IT87_SIO_VID_REG 0xfc /* VID value */
+#define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
/* Update battery voltage after every reading if true */
static int update_vbat;
@@ -187,6 +188,7 @@ static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
#define IT87_REG_VIN_ENABLE 0x50
#define IT87_REG_TEMP_ENABLE 0x51
+#define IT87_REG_BEEP_ENABLE 0x5c
#define IT87_REG_CHIPID 0x58
@@ -246,6 +248,7 @@ struct it87_sio_data {
/* Values read from Super-I/O config space */
u8 revision;
u8 vid_value;
+ u8 beep_pin;
/* Features skipped based on config or DMI */
u8 skip_vid;
u8 skip_fan;
@@ -279,6 +282,7 @@ struct it87_data {
u8 vid; /* Register encoding, combined */
u8 vrm;
u32 alarms; /* Register encoding, combined */
+ u8 beeps; /* Register encoding */
u8 fan_main_ctrl; /* Register value */
u8 fan_ctl; /* Register value */
@@ -919,6 +923,55 @@ 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 ssize_t show_beep(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct it87_data *data = it87_update_device(dev);
+ return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
+}
+static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct it87_data *data = dev_get_drvdata(dev);
+ long val;
+
+ if (strict_strtol(buf, 10, &val) < 0
+ || (val != 0 && val != 1))
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
+ if (val)
+ data->beeps |= (1 << bitnr);
+ else
+ data->beeps &= ~(1 << bitnr);
+ it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
+ show_beep, set_beep, 1);
+static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
+/* fanX_beep writability is set later */
+static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
+ show_beep, set_beep, 2);
+static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
+
static ssize_t
show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -1014,6 +1067,26 @@ static const struct attribute_group it87_group = {
.attrs = it87_attributes,
};
+static struct attribute *it87_attributes_beep[] = {
+ &sensor_dev_attr_in0_beep.dev_attr.attr,
+ &sensor_dev_attr_in1_beep.dev_attr.attr,
+ &sensor_dev_attr_in2_beep.dev_attr.attr,
+ &sensor_dev_attr_in3_beep.dev_attr.attr,
+ &sensor_dev_attr_in4_beep.dev_attr.attr,
+ &sensor_dev_attr_in5_beep.dev_attr.attr,
+ &sensor_dev_attr_in6_beep.dev_attr.attr,
+ &sensor_dev_attr_in7_beep.dev_attr.attr,
+
+ &sensor_dev_attr_temp1_beep.dev_attr.attr,
+ &sensor_dev_attr_temp2_beep.dev_attr.attr,
+ &sensor_dev_attr_temp3_beep.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group it87_group_beep = {
+ .attrs = it87_attributes_beep,
+};
+
static struct attribute *it87_attributes_fan16[5][3+1] = { {
&sensor_dev_attr_fan1_input16.dev_attr.attr,
&sensor_dev_attr_fan1_min16.dev_attr.attr,
@@ -1107,6 +1180,14 @@ static const struct attribute_group it87_group_pwm[3] = {
{ .attrs = it87_attributes_pwm[2] },
};
+static struct attribute *it87_attributes_fan_beep[] = {
+ &sensor_dev_attr_fan1_beep.dev_attr.attr,
+ &sensor_dev_attr_fan2_beep.dev_attr.attr,
+ &sensor_dev_attr_fan3_beep.dev_attr.attr,
+ &sensor_dev_attr_fan4_beep.dev_attr.attr,
+ &sensor_dev_attr_fan5_beep.dev_attr.attr,
+};
+
static struct attribute *it87_attributes_vid[] = {
&dev_attr_vrm.attr,
&dev_attr_cpu0_vid.attr,
@@ -1174,6 +1255,10 @@ static int __init it87_find(unsigned short *address,
if (sio_data->type == it87) {
/* The IT8705F doesn't have VID pins at all */
sio_data->skip_vid = 1;
+
+ /* The IT8705F has a different LD number for GPIO */
+ superio_select(5);
+ sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
} else {
int reg;
@@ -1207,7 +1292,11 @@ static int __init it87_find(unsigned short *address,
pr_info("it87: in3 is VCC (+5V)\n");
if (reg & (1 << 1))
pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
+
+ sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
}
+ if (sio_data->beep_pin)
+ pr_info("it87: Beeping is supported\n");
/* Disable specific features based on DMI strings */
board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
@@ -1240,10 +1329,15 @@ static void it87_remove_files(struct device *dev)
int i;
sysfs_remove_group(&dev->kobj, &it87_group);
+ if (sio_data->beep_pin)
+ sysfs_remove_group(&dev->kobj, &it87_group_beep);
for (i = 0; i < 5; i++) {
if (!(data->has_fan & (1 << i)))
continue;
sysfs_remove_group(&dev->kobj, &fan_group[i]);
+ if (sio_data->beep_pin)
+ sysfs_remove_file(&dev->kobj,
+ it87_attributes_fan_beep[i]);
}
for (i = 0; i < 3; i++) {
if (sio_data->skip_pwm & (1 << 0))
@@ -1263,6 +1357,7 @@ static int __devinit it87_probe(struct platform_device *pdev)
const struct attribute_group *fan_group;
int err = 0, i;
int enable_pwm_interface;
+ int fan_beep_need_rw;
static const char *names[] = {
"it87",
"it8712",
@@ -1311,14 +1406,40 @@ static int __devinit it87_probe(struct platform_device *pdev)
if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
goto ERROR2;
+ if (sio_data->beep_pin) {
+ err = sysfs_create_group(&dev->kobj, &it87_group_beep);
+ if (err)
+ goto ERROR4;
+ }
+
/* Do not create fan files for disabled fans */
fan_group = it87_get_fan_group(data);
+ fan_beep_need_rw = 1;
for (i = 0; i < 5; i++) {
if (!(data->has_fan & (1 << i)))
continue;
err = sysfs_create_group(&dev->kobj, &fan_group[i]);
if (err)
goto ERROR4;
+
+ if (sio_data->beep_pin) {
+ err = sysfs_create_file(&dev->kobj,
+ it87_attributes_fan_beep[i]);
+ if (err)
+ goto ERROR4;
+ if (!fan_beep_need_rw)
+ continue;
+
+ /* As we have a single beep enable bit for all fans,
+ * only the first enabled fan has a writable attribute
+ * for it. */
+ if (sysfs_chmod_file(&dev->kobj,
+ it87_attributes_fan_beep[i],
+ S_IRUGO | S_IWUSR))
+ dev_dbg(dev, "chmod +w fan%d_beep failed\n",
+ i + 1);
+ fan_beep_need_rw = 0;
+ }
}
if (enable_pwm_interface) {
@@ -1608,6 +1729,7 @@ static struct it87_data *it87_update_device(struct device *dev)
it87_read_value(data, IT87_REG_ALARM1) |
(it87_read_value(data, IT87_REG_ALARM2) << 8) |
(it87_read_value(data, IT87_REG_ALARM3) << 16);
+ data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
data->fan_main_ctrl = it87_read_value(data,
IT87_REG_FAN_MAIN_CTRL);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-19 18:23:11 +0000