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hwmon: (adm1025) Clean up detect function

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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 20:35:51 +01:00
parent 8007ea35ef
commit 9560672369
1 changed files with 20 additions and 53 deletions
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73
drivers/hwmon/adm1025.c
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@ -2,7 +2,7 @@
* adm1025.c
*
* Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
* Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org>
* Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
*
* The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
* voltages (including its own power source) and up to two temperatures
@ -413,67 +413,34 @@ static int adm1025_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
const char *name = "";
u8 config;
const char *name;
u8 man_id, 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. 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.
*/
config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
if (kind < 0) { /* detection */
if ((config & 0x80) != 0x00
|| (i2c_smbus_read_byte_data(client,
ADM1025_REG_STATUS1) & 0xC0) != 0x00
|| (i2c_smbus_read_byte_data(client,
ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
dev_dbg(&adapter->dev,
"ADM1025 detection failed at 0x%02x.\n",
client->addr);
return -ENODEV;
}
/* Check for unused bits */
if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
|| (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
|| (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
client->addr);
return -ENODEV;
}
if (kind <= 0) { /* identification */
u8 man_id, chip_id;
/* Identification */
chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
if ((chip_id & 0xF0) != 0x20)
return -ENODEV;
man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
if (man_id == 0x41) { /* Analog Devices */
if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
kind = adm1025;
}
} else
if (man_id == 0xA1) { /* Philips */
if (client->addr != 0x2E
&& (chip_id & 0xF0) == 0x20) { /* NE1619 */
kind = ne1619;
}
}
if (kind <= 0) { /* identification failed */
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X).\n", man_id, chip_id);
return -ENODEV;
}
}
if (kind == adm1025) {
man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
if (man_id == 0x41)
name = "adm1025";
} else if (kind == ne1619) {
else if (man_id == 0xA1 && client->addr != 0x2E)
name = "ne1619";
}
else
return -ENODEV;
strlcpy(info->type, name, I2C_NAME_SIZE);
return 0;