hwmon/w83781d: Clean up conversion macros
* Fix voltage rounding
* Drop useless macros
* Drop useless casts
* Turn macros evaluating their parameters more than once into inline
functions
* Use signed variables for temperatures
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 96338dd..4f93d79 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -164,12 +164,9 @@
#define W83781D_REG_RT_IDX 0x50
#define W83781D_REG_RT_VAL 0x51
-/* Conversions. Rounding and limit checking is only done on the TO_REG
- variants. Note that you should be a bit careful with which arguments
- these macros are called: arguments may be evaluated more than once.
- Fixing this is just not worth it. */
-#define IN_TO_REG(val) (SENSORS_LIMIT((((val) * 10 + 8)/16),0,255))
-#define IN_FROM_REG(val) (((val) * 16) / 10)
+/* Conversions */
+#define IN_TO_REG(val) SENSORS_LIMIT(((val) + 8) / 16, 0, 255)
+#define IN_FROM_REG(val) ((val) * 16)
static inline u8
FAN_TO_REG(long rpm, int div)
@@ -180,24 +177,24 @@
return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
-#define FAN_FROM_REG(val,div) ((val) == 0 ? -1 : \
- ((val) == 255 ? 0 : \
- 1350000 / ((val) * (div))))
+static inline long
+FAN_FROM_REG(u8 val, int div)
+{
+ if (val == 0)
+ return -1;
+ if (val == 255)
+ return 0;
+ return 1350000 / (val * div);
+}
-#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
- : (val)) / 1000, 0, 0xff))
-#define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
+#define TEMP_TO_REG(val) SENSORS_LIMIT((val) / 1000, -127, 128)
+#define TEMP_FROM_REG(val) ((val) * 1000)
-#define PWM_FROM_REG(val) (val)
-#define PWM_TO_REG(val) (SENSORS_LIMIT((val),0,255))
#define BEEP_MASK_FROM_REG(val,type) ((type) == as99127f ? \
(val) ^ 0x7fff : (val))
#define BEEP_MASK_TO_REG(val,type) ((type) == as99127f ? \
(~(val)) & 0x7fff : (val) & 0xffffff)
-#define BEEP_ENABLE_TO_REG(val) ((val) ? 1 : 0)
-#define BEEP_ENABLE_FROM_REG(val) ((val) ? 1 : 0)
-
#define DIV_FROM_REG(val) (1 << (val))
static inline u8
@@ -212,7 +209,7 @@
break;
val >>= 1;
}
- return ((u8) i);
+ return i;
}
/* There are some complications in a module like this. First off, W83781D chips
@@ -246,9 +243,9 @@
u8 in_min[9]; /* Register value - 8 & 9 for 782D only */
u8 fan[3]; /* Register value */
u8 fan_min[3]; /* Register value */
- u8 temp;
- u8 temp_max; /* Register value */
- u8 temp_max_hyst; /* Register value */
+ s8 temp; /* Register value */
+ s8 temp_max; /* Register value */
+ s8 temp_max_hyst; /* Register value */
u16 temp_add[2]; /* Register value */
u16 temp_max_add[2]; /* Register value */
u16 temp_max_hyst_add[2]; /* Register value */
@@ -303,7 +300,7 @@
static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
{ \
struct w83781d_data *data = w83781d_update_device(dev); \
- return sprintf(buf,"%ld\n", (long)IN_FROM_REG(data->reg[nr] * 10)); \
+ return sprintf(buf, "%ld\n", (long)IN_FROM_REG(data->reg[nr])); \
}
show_in_reg(in);
show_in_reg(in_min);
@@ -316,7 +313,7 @@
struct i2c_client *client = &data->client; \
u32 val; \
\
- val = simple_strtoul(buf, NULL, 10) / 10; \
+ val = simple_strtoul(buf, NULL, 10); \
\
mutex_lock(&data->update_lock); \
data->in_##reg[nr] = IN_TO_REG(val); \
@@ -534,8 +531,7 @@
static ssize_t show_beep_enable (struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83781d_data *data = w83781d_update_device(dev);
- return sprintf(buf, "%ld\n",
- (long)BEEP_ENABLE_FROM_REG(data->beep_enable));
+ return sprintf(buf, "%ld\n", (long)data->beep_enable);
}
#define BEEP_ENABLE 0 /* Store beep_enable */
@@ -566,7 +562,7 @@
val2 = (data->beep_mask >> 8) & 0x7f;
} else { /* We are storing beep_enable */
val2 = w83781d_read_value(client, W83781D_REG_BEEP_INTS2) & 0x7f;
- data->beep_enable = BEEP_ENABLE_TO_REG(val);
+ data->beep_enable = !!val;
}
w83781d_write_value(client, W83781D_REG_BEEP_INTS2,
@@ -659,7 +655,7 @@
show_pwm_reg(struct device *dev, char *buf, int nr)
{
struct w83781d_data *data = w83781d_update_device(dev);
- return sprintf(buf, "%ld\n", (long) PWM_FROM_REG(data->pwm[nr - 1]));
+ return sprintf(buf, "%ld\n", (long)data->pwm[nr - 1]);
}
static ssize_t
@@ -679,7 +675,7 @@
val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
- data->pwm[nr - 1] = PWM_TO_REG(val);
+ data->pwm[nr - 1] = SENSORS_LIMIT(val, 0, 255);
w83781d_write_value(client, W83781D_REG_PWM(nr), data->pwm[nr - 1]);
mutex_unlock(&data->update_lock);
return count;
