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hwmon: (it87) Export labels for internal sensors

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Some voltage sensors can be wired internally to the IT87xxF chip's own
power supply channels. In that case, we can inform user-space that the
wiring is known by exporting proper labels for these sensors.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2010-08-14 21:08:50 +02:00
parent 9914518e79
commit 738e5e0536
1 changed files with 44 additions and 2 deletions
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46
drivers/hwmon/it87.c
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@ -259,6 +259,7 @@ struct it87_sio_data {
u8 revision;
u8 vid_value;
u8 beep_pin;
u8 internal; /* Internal sensors can be labeled */
/* Features skipped based on config or DMI */
u8 skip_vid;
u8 skip_fan;
@ -1194,6 +1195,22 @@ static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
static ssize_t show_label(struct device *dev, struct device_attribute *attr,
char *buf)
{
static const char *labels[] = {
"+5V",
"5VSB",
"Vbat",
};
int nr = to_sensor_dev_attr(attr)->index;
return sprintf(buf, "%s\n", labels[nr]);
}
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
static ssize_t show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
@ -1434,6 +1451,17 @@ static const struct attribute_group it87_group_vid = {
.attrs = it87_attributes_vid,
};
static struct attribute *it87_attributes_label[] = {
&sensor_dev_attr_in3_label.dev_attr.attr,
&sensor_dev_attr_in7_label.dev_attr.attr,
&sensor_dev_attr_in8_label.dev_attr.attr,
NULL
};
static const struct attribute_group it87_group_label = {
.attrs = it87_attributes_vid,
};
/* 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)
@ -1487,6 +1515,9 @@ static int __init it87_find(unsigned short *address,
pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
chip_type, *address, sio_data->revision);
/* in8 (Vbat) is always internal */
sio_data->internal = (1 << 2);
/* Read GPIO config and VID value from LDN 7 (GPIO) */
if (sio_data->type == it87) {
/* The IT8705F doesn't have VID pins at all */
@ -1540,9 +1571,9 @@ static int __init it87_find(unsigned short *address,
pr_notice("it87: Routing internal VCCH to in7\n");
}
if (reg & (1 << 0))
pr_info("it87: in3 is VCC (+5V)\n");
sio_data->internal |= (1 << 0);
if (reg & (1 << 1))
pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
sio_data->internal |= (1 << 1);
sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
}
@ -1600,6 +1631,7 @@ static void it87_remove_files(struct device *dev)
}
if (!sio_data->skip_vid)
sysfs_remove_group(&dev->kobj, &it87_group_vid);
sysfs_remove_group(&dev->kobj, &it87_group_label);
}
static int __devinit it87_probe(struct platform_device *pdev)
@ -1725,6 +1757,16 @@ static int __devinit it87_probe(struct platform_device *pdev)
goto ERROR4;
}
/* Export labels for internal sensors */
for (i = 0; i < 3; i++) {
if (!(sio_data->internal & (1 << i)))
continue;
err = sysfs_create_file(&dev->kobj,
it87_attributes_label[i]);
if (err)
goto ERROR4;
}
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);