The sch5627 needs to be explicitly told to start an adc conversion
for Vbat, once in a while. Without this Vbat may read 0, and will never
get updated.
Signed-off-By: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/hwmon/sch5627.c | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index 09a47bf..e23ea34 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -94,6 +94,7 @@ static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
struct sch5627_data {
unsigned short addr;
struct device *hwmon_dev;
+ u8 control;
u8 temp_max[SCH5627_NO_TEMPS];
u8 temp_crit[SCH5627_NO_TEMPS];
u16 fan_min[SCH5627_NO_FANS];
@@ -101,6 +102,7 @@ struct sch5627_data {
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
+ unsigned long last_battery; /* In jiffies */
u16 temp[SCH5627_NO_TEMPS];
u16 fan[SCH5627_NO_FANS];
u16 in[SCH5627_NO_IN];
@@ -327,6 +329,14 @@ static struct sch5627_data *sch5627_update_device(struct device *dev)
}
data->last_updated = jiffies;
+ }
+
+ /* Trigger a Vbat voltage measurement every minute */
+ if (time_after(jiffies, data->last_battery + 60 * HZ) ||
+ !data->valid) {
+ sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
+ data->control | 0x10);
+ data->last_battery = jiffies;
data->valid = 1;
}
abort:
@@ -714,11 +724,16 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
err = val;
goto error;
}
- if (!(val & 0x01)) {
+ data->control = val;
+ if (!(data->control & 0x01)) {
pr_err("hardware monitoring not enabled\n");
err = -ENODEV;
goto error;
}
+ /* Trigger a Vbat voltage measurement, so that we get a valid reading
+ the first time we read Vbat */
+ sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
+ data->control | 0x10);
/*
* Read limits, we do this only once as reading a register on
--
1.7.4.4
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