hello,
we have problems with measuring of vbat on our motherboard with w83627hf-chip.
The vbat values are only valid when we visited the bios-hardware-monitor-pages
during startup of our linux installation.
kernel version: 2.6.22.1-rt9
We then figured out, that in the chipset exists a bit(W83627HF_REG_VBAT:Bit0)
which controls the measuring behaviour of vbat.
When we visit the bios or when we switch on the bit in the kernel-file w83627hf.c,
then vbat shows valid values. (in /sys/devices/platform/w83627hf.656/in8_input)
In parallel we found a bugfix for the w83627ehf.c-driver (see below)
which enables exactly this bit.
It seems that the same Bugfix should be made to the w83627hf.c-driver.
But please note: In another motherboard with another bios everything worked well,
It looks like that the initial Value of this Bit is bios-dependant.
Thomas Husterer
hwmon/w83627ehf: Enable VBAT monitoring
If VBAT monitoring is disabled, enable it. Original patch from
an anonymous contributor on the lm-sensors trac system:
http://lm-sensors.org/ticket/2218
[kernel/mhoffman/hwmon-2.6.git] / drivers / hwmon / w83627ehf.c
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index a336793..e87fcf8 100644 (file)
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -1205,6 +1205,11 @@ static inline void devinit w83627ehf_init_device(struct w83627ehf_data *data)
W83627EHF_REG_TEMP_CONFIG[i],
tmp & 0xfe);
}
+
+ /* Enable VBAT monitoring if needed */
+ tmp = w83627ehf_read_value(data, W83627EHF_REG_VBAT);
+ if (!(tmp & 0x01))
+ w83627ehf_write_value(data, W83627EHF_REG_VBAT, tmp | 0x01);
}
static int devinit w83627ehf_probe(struct platform_device *pdev)
