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[PATCH] hwmon: w83792d simplify in low bits handling 

Simplify the way the w83792d driver handles the extra resolution
bits of voltage input channels.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Yuan Mu <Ymu@winbond.com.tw>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jean Delvare 2005-12-18 16:34:28 +01:00 committed by Greg Kroah-Hartman
parent c9152deaa6
commit 99d855602c
1 changed files with 10 additions and 38 deletions
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48
drivers/hwmon/w83792d.c
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@ -281,7 +281,7 @@ struct w83792d_data {
u8 in[9]; /* Register value */
u8 in_max[9]; /* Register value */
u8 in_min[9]; /* Register value */
u8 low_bits[2]; /* Additional resolution to voltage in0-6 */
u16 low_bits; /* Additional resolution to voltage in6-0 */
u8 fan[7]; /* Register value */
u8 fan_min[7]; /* Register value */
u8 temp1[3]; /* current, over, thyst */
@ -323,38 +323,10 @@ static struct i2c_driver w83792d_driver = {
.detach_client = w83792d_detach_client,
};
static long in_count_from_reg(int nr, struct w83792d_data *data)
static inline long in_count_from_reg(int nr, struct w83792d_data *data)
{
u16 vol_count = data->in[nr];
u16 low_bits = 0;
vol_count = (vol_count << 2);
switch (nr)
{
case 0: /* vin0 */
low_bits = (data->low_bits[0]) & 0x03;
break;
case 1: /* vin1 */
low_bits = ((data->low_bits[0]) & 0x0c) >> 2;
break;
case 2: /* vin2 */
low_bits = ((data->low_bits[0]) & 0x30) >> 4;
break;
case 3: /* vin3 */
low_bits = ((data->low_bits[0]) & 0xc0) >> 6;
break;
case 4: /* vin4 */
low_bits = (data->low_bits[1]) & 0x03;
break;
case 5: /* vin5 */
low_bits = ((data->low_bits[1]) & 0x0c) >> 2;
break;
case 6: /* vin6 */
low_bits = ((data->low_bits[1]) & 0x30) >> 4;
default:
break;
}
vol_count = vol_count | low_bits;
return vol_count;
/* in7 and in8 do not have low bits, but the formula still works */
return ((data->in[nr] << 2) | ((data->low_bits >> (2 * nr)) & 0x03));
}
/* following are the sysfs callback functions */
@ -1481,10 +1453,10 @@ static struct w83792d_data *w83792d_update_device(struct device *dev)
data->in_min[i] = w83792d_read_value(client,
W83792D_REG_IN_MIN[i]);
}
data->low_bits[0] = w83792d_read_value(client,
W83792D_REG_LOW_BITS1);
data->low_bits[1] = w83792d_read_value(client,
W83792D_REG_LOW_BITS2);
data->low_bits = w83792d_read_value(client,
W83792D_REG_LOW_BITS1) +
(w83792d_read_value(client,
W83792D_REG_LOW_BITS2) << 8);
for (i = 0; i < 7; i++) {
/* Update the Fan measured value and limits */
data->fan[i] = w83792d_read_value(client,
@ -1596,8 +1568,8 @@ static void w83792d_print_debug(struct w83792d_data *data, struct device *dev)
dev_dbg(dev, "vin[%d] max is: 0x%x\n", i, data->in_max[i]);
dev_dbg(dev, "vin[%d] min is: 0x%x\n", i, data->in_min[i]);
}
dev_dbg(dev, "Low Bit1 is: 0x%x\n", data->low_bits[0]);
dev_dbg(dev, "Low Bit2 is: 0x%x\n", data->low_bits[1]);
dev_dbg(dev, "Low Bit1 is: 0x%x\n", data->low_bits & 0xff);
dev_dbg(dev, "Low Bit2 is: 0x%x\n", data->low_bits >> 8);
dev_dbg(dev, "7 set of Fan Counts and Duty Cycles: =====>\n");
for (i=0; i<7; i++) {
dev_dbg(dev, "fan[%d] is: 0x%x\n", i, data->fan[i]);