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hwmon: (w83795) List all usable temperature sources 

Temperature sources are not correlated directly with temperature
channels. A look-up table is required to find out which temperature
sources can be used depending on which temperature channels (both
analog and digital) are enabled.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Jean Delvare 2010-11-15 21:38:56 +01:00 committed by Jean Delvare
parent d5ab845a13
commit edff2f8d81
1 changed files with 54 additions and 3 deletions
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57
drivers/hwmon/w83795.c
View File

@ -178,6 +178,14 @@ static const u8 IN_LSB_SHIFT_IDX[][2] = {
#define W83795_REG_TSS(index) (0x209 + (index))
#define TSS_MAP_RESERVED 0xff
static const u8 tss_map[4][6] = {
{ 0, 1, 2, 3, 4, 5},
{ 6, 7, 8, 9, 0, 1},
{10, 11, 12, 13, 2, 3},
{ 4, 5, 4, 5, TSS_MAP_RESERVED, TSS_MAP_RESERVED},
};
#define PWM_OUTPUT 0
#define PWM_FREQ 1
#define PWM_START 2
@ -930,6 +938,27 @@ show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
return sprintf(buf, "%u\n", mode);
}
/*
* Check whether a given temperature source can ever be useful.
* Returns the number of selectable temperature channels which are
* enabled.
*/
static int w83795_tss_useful(const struct w83795_data *data, int tsrc)
{
int useful = 0, i;
for (i = 0; i < 4; i++) {
if (tss_map[i][tsrc] == TSS_MAP_RESERVED)
continue;
if (tss_map[i][tsrc] < 6) /* Analog */
useful += (data->has_temp >> tss_map[i][tsrc]) & 1;
else /* Digital */
useful += (data->has_dts >> (tss_map[i][tsrc] - 6)) & 1;
}
return useful;
}
static ssize_t
show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
{
@ -1608,8 +1637,6 @@ store_sf_setup(struct device *dev, struct device_attribute *attr,
SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
show_alarm_beep, store_beep, BEEP_ENABLE, \
index + (index > 4 ? 11 : 17)), \
SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO, \
show_temp_src, store_temp_src, NOT_USED, index - 1), \
SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
show_temp_pwm_enable, store_temp_pwm_enable, \
TEMP_PWM_ENABLE, index - 1), \
@ -1695,7 +1722,7 @@ static const struct sensor_device_attribute_2 w83795_fan[][4] = {
SENSOR_ATTR_FAN(14),
};
static const struct sensor_device_attribute_2 w83795_temp[][29] = {
static const struct sensor_device_attribute_2 w83795_temp[][28] = {
SENSOR_ATTR_TEMP(1),
SENSOR_ATTR_TEMP(2),
SENSOR_ATTR_TEMP(3),
@ -1726,6 +1753,21 @@ static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
SENSOR_ATTR_PWM(8),
};
static const struct sensor_device_attribute_2 w83795_tss[6] = {
SENSOR_ATTR_2(temp1_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 0),
SENSOR_ATTR_2(temp2_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 1),
SENSOR_ATTR_2(temp3_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 2),
SENSOR_ATTR_2(temp4_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 3),
SENSOR_ATTR_2(temp5_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 4),
SENSOR_ATTR_2(temp6_source_sel, S_IWUSR | S_IRUGO,
show_temp_src, store_temp_src, NOT_USED, 5),
};
static const struct sensor_device_attribute_2 sda_single_files[] = {
SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
store_chassis_clear, ALARM_STATUS, 46),
@ -1890,6 +1932,15 @@ static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
}
}
for (i = 0; i < ARRAY_SIZE(w83795_tss); i++) {
j = w83795_tss_useful(data, i);
if (!j)
continue;
err = fn(dev, &w83795_tss[i].dev_attr);
if (err)
return err;
}
for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
err = fn(dev, &sda_single_files[i].dev_attr);
if (err)