diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/w83792d.c | 29 |
1 files changed, 9 insertions, 20 deletions
diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c index ff1c9f0abf93..0ad1ae569531 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; @@ -1192,7 +1191,6 @@ 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 +1241,7 @@ 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 +1414,17 @@ 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 @@ -1506,7 +1495,7 @@ 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); |