summaryrefslogtreecommitdiff
path: root/drivers/hwmon/w83792d.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/w83792d.c')
-rw-r--r--drivers/hwmon/w83792d.c83
1 files changed, 22 insertions, 61 deletions
diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
index 1ba072630361..b176bf0c4c7b 100644
--- a/drivers/hwmon/w83792d.c
+++ b/drivers/hwmon/w83792d.c
@@ -269,7 +269,6 @@ DIV_TO_REG(long val)
struct w83792d_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore lock;
enum chips type;
struct semaphore update_lock;
@@ -282,7 +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 */
@@ -317,45 +316,17 @@ static void w83792d_print_debug(struct w83792d_data *data, struct device *dev);
static void w83792d_init_client(struct i2c_client *client);
static struct i2c_driver w83792d_driver = {
- .owner = THIS_MODULE,
- .name = "w83792d",
- .flags = I2C_DF_NOTIFY,
+ .driver = {
+ .name = "w83792d",
+ },
.attach_adapter = w83792d_attach_adapter,
.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 */
@@ -1192,7 +1163,6 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
- init_MUTEX(&data->lock);
new_client->adapter = adapter;
new_client->driver = &w83792d_driver;
new_client->flags = 0;
@@ -1243,7 +1213,7 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
goto ERROR1;
}
val1 = w83792d_read_value(new_client, W83792D_REG_WCHIPID);
- if (val1 == 0x7a && address >= 0x2c) {
+ if (val1 == 0x7a) {
kind = w83792d;
} else {
if (kind == 0)
@@ -1416,26 +1386,17 @@ w83792d_detach_client(struct i2c_client *client)
return 0;
}
-/* The SMBus locks itself, usually, but nothing may access the Winbond between
- bank switches. ISA access must always be locked explicitly!
- We ignore the W83792D BUSY flag at this moment - it could lead to deadlocks,
- would slow down the W83792D access and should not be necessary.
- There are some ugly typecasts here, but the good news is - they should
- nowhere else be necessary! */
-static int
-w83792d_read_value(struct i2c_client *client, u8 reg)
+/* The SMBus locks itself. The Winbond W83792D chip has a bank register,
+ but the driver only accesses registers in bank 0, so we don't have
+ to switch banks and lock access between switches. */
+static int w83792d_read_value(struct i2c_client *client, u8 reg)
{
- int res=0;
- res = i2c_smbus_read_byte_data(client, reg);
-
- return res;
+ return i2c_smbus_read_byte_data(client, reg);
}
-static int
-w83792d_write_value(struct i2c_client *client, u8 reg, u8 value)
+static int w83792d_write_value(struct i2c_client *client, u8 reg, u8 value)
{
- i2c_smbus_write_byte_data(client, reg, value);
- return 0;
+ return i2c_smbus_write_byte_data(client, reg, value);
}
static void
@@ -1492,10 +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,
@@ -1506,7 +1467,7 @@ static struct w83792d_data *w83792d_update_device(struct device *dev)
pwm_array_tmp[i] = w83792d_read_value(client,
W83792D_REG_PWM[i]);
data->pwm[i] = pwm_array_tmp[i] & 0x0f;
- data->pwm_mode[i] = (pwm_array_tmp[i] >> 7) & 0x01;
+ data->pwm_mode[i] = pwm_array_tmp[i] >> 7;
}
reg_tmp = w83792d_read_value(client, W83792D_REG_FAN_CFG);
@@ -1607,8 +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]);
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-29 05:48:51 +0000