提交 357b9dc6 编写于 作者: H Hans de Goede 提交者: Jean Delvare

hwmon: (sch5627) Trigger Vbat measurements

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: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
上级 709046a6
......@@ -97,11 +97,13 @@ 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];
struct mutex update_lock;
unsigned long last_battery; /* In jiffies */
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u16 temp[SCH5627_NO_TEMPS];
......@@ -243,6 +245,12 @@ static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
return sch5627_send_cmd(data, SCH5627_CMD_READ, reg, 0);
}
static int sch5627_write_virtual_reg(struct sch5627_data *data,
u16 reg, u8 val)
{
return sch5627_send_cmd(data, SCH5627_CMD_WRITE, reg, val);
}
static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
{
int lsb, msb;
......@@ -287,6 +295,13 @@ static struct sch5627_data *sch5627_update_device(struct device *dev)
mutex_lock(&data->update_lock);
/* Trigger a Vbat voltage measurement every 5 minutes */
if (time_after(jiffies, data->last_battery + 300 * HZ)) {
sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
data->control | 0x10);
data->last_battery = jiffies;
}
/* Cache the values for 1 second */
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
for (i = 0; i < SCH5627_NO_TEMPS; i++) {
......@@ -711,11 +726,17 @@ 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);
data->last_battery = jiffies;
/*
* Read limits, we do this only once as reading a register on
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册