[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>
diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
index 0ad1ae5..b176bf0 100644
--- a/drivers/hwmon/w83792d.c
+++ b/drivers/hwmon/w83792d.c
@@ -281,7 +281,7 @@
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 @@
.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 @@
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 @@
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]);