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hwmon: (w83l785ts) Clean up detect function 

As kind is now hard-coded to -1, there is room for code clean-ups.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2009-12-09 20:35:56 +01:00
parent 2de1875a58
commit a1fa4cdcc4
1 changed files with 22 additions and 46 deletions
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68
drivers/hwmon/w83l785ts.c
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@ -1,7 +1,7 @@
/*
* w83l785ts.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
* Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
*
* Inspired from the lm83 driver. The W83L785TS-S is a sensor chip made
* by Winbond. It reports a single external temperature with a 1 deg
@ -146,60 +146,36 @@ static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 1);
*/
/* Return 0 if detection is successful, -ENODEV otherwise */
static int w83l785ts_detect(struct i2c_client *new_client, int kind,
static int w83l785ts_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = new_client->adapter;
struct i2c_adapter *adapter = client->adapter;
u16 man_id;
u8 chip_id;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
/*
* Now we do the remaining detection. A negative kind means that
* the driver was loaded with no force parameter (default), so we
* must both detect and identify the chip (actually there is only
* one possible kind of chip for now, W83L785TS-S). A zero kind means
* that the driver was loaded with the force parameter, the detection
* step shall be skipped. A positive kind means that the driver
* was loaded with the force parameter and a given kind of chip is
* requested, so both the detection and the identification steps
* are skipped.
*/
if (kind < 0) { /* detection */
if (((w83l785ts_read_value(new_client,
W83L785TS_REG_CONFIG, 0) & 0x80) != 0x00)
|| ((w83l785ts_read_value(new_client,
W83L785TS_REG_TYPE, 0) & 0xFC) != 0x00)) {
dev_dbg(&adapter->dev,
"W83L785TS-S detection failed at 0x%02x.\n",
new_client->addr);
return -ENODEV;
}
/* detection */
if ((w83l785ts_read_value(client, W83L785TS_REG_CONFIG, 0) & 0x80)
|| (w83l785ts_read_value(client, W83L785TS_REG_TYPE, 0) & 0xFC)) {
dev_dbg(&adapter->dev,
"W83L785TS-S detection failed at 0x%02x\n",
client->addr);
return -ENODEV;
}
if (kind <= 0) { /* identification */
u16 man_id;
u8 chip_id;
/* Identification */
man_id = (w83l785ts_read_value(client, W83L785TS_REG_MAN_ID1, 0) << 8)
+ w83l785ts_read_value(client, W83L785TS_REG_MAN_ID2, 0);
chip_id = w83l785ts_read_value(client, W83L785TS_REG_CHIP_ID, 0);
man_id = (w83l785ts_read_value(new_client,
W83L785TS_REG_MAN_ID1, 0) << 8) +
w83l785ts_read_value(new_client,
W83L785TS_REG_MAN_ID2, 0);
chip_id = w83l785ts_read_value(new_client,
W83L785TS_REG_CHIP_ID, 0);
if (man_id == 0x5CA3) { /* Winbond */
if (chip_id == 0x70) { /* W83L785TS-S */
kind = w83l785ts;
}
}
if (kind <= 0) { /* identification failed */
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%04X, "
"chip_id=0x%02X).\n", man_id, chip_id);
return -ENODEV;
}
if (man_id != 0x5CA3 /* Winbond */
|| chip_id != 0x70) { /* W83L785TS-S */
dev_dbg(&adapter->dev,
"Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
man_id, chip_id);
return -ENODEV;
}
strlcpy(info->type, "w83l785ts", I2C_NAME_SIZE);