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hwmon: (dme1737) fix voltage scaling 

This patch fixes a voltage scaling issue for the sch311x device.

Signed-Off-By: Juerg Haefliger <juergh at gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Juerg Haefliger 2008-03-25 21:49:15 -07:00 committed by Mark M. Hoffman
parent 92430b6feb
commit f994fb23d3
1 changed files with 21 additions and 11 deletions
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32
drivers/hwmon/dme1737.c
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@ -181,6 +181,7 @@ struct dme1737_data {
int valid; /* !=0 if following fields are valid */
unsigned long last_update; /* in jiffies */
unsigned long last_vbat; /* in jiffies */
enum chips type;
u8 vid;
u8 pwm_rr_en;
@ -215,20 +216,27 @@ struct dme1737_data {
};
/* Nominal voltage values */
static const int IN_NOMINAL[] = {5000, 2250, 3300, 5000, 12000, 3300, 3300};
static const int IN_NOMINAL_DME1737[] = {5000, 2250, 3300, 5000, 12000, 3300,
3300};
static const int IN_NOMINAL_SCH311x[] = {2500, 1500, 3300, 5000, 12000, 3300,
3300};
#define IN_NOMINAL(ix, type) (((type) == dme1737) ? \
IN_NOMINAL_DME1737[(ix)] : \
IN_NOMINAL_SCH311x[(ix)])
/* Voltage input
* Voltage inputs have 16 bits resolution, limit values have 8 bits
* resolution. */
static inline int IN_FROM_REG(int reg, int ix, int res)
static inline int IN_FROM_REG(int reg, int ix, int res, int type)
{
return (reg * IN_NOMINAL[ix] + (3 << (res - 3))) / (3 << (res - 2));
return (reg * IN_NOMINAL(ix, type) + (3 << (res - 3))) /
(3 << (res - 2));
}
static inline int IN_TO_REG(int val, int ix)
static inline int IN_TO_REG(int val, int ix, int type)
{
return SENSORS_LIMIT((val * 192 + IN_NOMINAL[ix] / 2) /
IN_NOMINAL[ix], 0, 255);
return SENSORS_LIMIT((val * 192 + IN_NOMINAL(ix, type) / 2) /
IN_NOMINAL(ix, type), 0, 255);
}
/* Temperature input
@ -727,13 +735,13 @@ static ssize_t show_in(struct device *dev, struct device_attribute *attr,
switch (fn) {
case SYS_IN_INPUT:
res = IN_FROM_REG(data->in[ix], ix, 16);
res = IN_FROM_REG(data->in[ix], ix, 16, data->type);
break;
case SYS_IN_MIN:
res = IN_FROM_REG(data->in_min[ix], ix, 8);
res = IN_FROM_REG(data->in_min[ix], ix, 8, data->type);
break;
case SYS_IN_MAX:
res = IN_FROM_REG(data->in_max[ix], ix, 8);
res = IN_FROM_REG(data->in_max[ix], ix, 8, data->type);
break;
case SYS_IN_ALARM:
res = (data->alarms >> DME1737_BIT_ALARM_IN[ix]) & 0x01;
@ -760,12 +768,12 @@ static ssize_t set_in(struct device *dev, struct device_attribute *attr,
mutex_lock(&data->update_lock);
switch (fn) {
case SYS_IN_MIN:
data->in_min[ix] = IN_TO_REG(val, ix);
data->in_min[ix] = IN_TO_REG(val, ix, data->type);
dme1737_write(client, DME1737_REG_IN_MIN(ix),
data->in_min[ix]);
break;
case SYS_IN_MAX:
data->in_max[ix] = IN_TO_REG(val, ix);
data->in_max[ix] = IN_TO_REG(val, ix, data->type);
dme1737_write(client, DME1737_REG_IN_MAX(ix),
data->in_max[ix]);
break;
@ -2167,6 +2175,7 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
kind = dme1737;
name = "dme1737";
data->type = kind;
/* Fill in the remaining client fields and put it into the global
* list */
@ -2359,6 +2368,7 @@ static int __devinit dme1737_isa_probe(struct platform_device *pdev)
err = -ENODEV;
goto exit_kfree;
}
data->type = -1;
/* Fill in the remaining client fields and initialize the mutex */
strlcpy(client->name, "sch311x", I2C_NAME_SIZE);