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hwmon: (max6650) Drop device detection

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MAX6650 device detection is unreliable, we got reports of false
positives. We now have many ways to let users instantiate the devices
explicitly, so unreliable detection should be dropped.

Signed-off-by: Jean Delvare <[email protected]>
Acked-by: "Hans J. Koch" <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
This commit is contained in:
Jean Delvare 2011-05-25 20:43:32 +02:00 • committed by Jean Delvare
commit 67b670ff04
2 changed files with 8 additions and 45 deletions
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44
drivers/hwmon/max6650.c
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@ -40,13 +40,6 @@
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
/*
* Addresses to scan. There are four disjoint possibilities, by pin config.
*/
static const unsigned short normal_i2c[] = {0x1b, 0x1f, 0x48, 0x4b,
I2C_CLIENT_END};
/*
* Insmod parameters
*/
@ -114,8 +107,6 @@ module_param(clock, int, S_IRUGO);
static int max6650_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int max6650_detect(struct i2c_client *client,
struct i2c_board_info *info);
static int max6650_init_client(struct i2c_client *client);
static int max6650_remove(struct i2c_client *client);
static struct max6650_data *max6650_update_device(struct device *dev);
@ -131,15 +122,12 @@ static const struct i2c_device_id max6650_id[] = {
MODULE_DEVICE_TABLE(i2c, max6650_id);
static struct i2c_driver max6650_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "max6650",
},
.probe = max6650_probe,
.remove = max6650_remove,
.id_table = max6650_id,
.detect = max6650_detect,
.address_list = normal_i2c,
};
/*
@ -525,38 +513,6 @@ static struct attribute_group max6650_attr_grp = {
* Real code
*/
/* Return 0 if detection is successful, -ENODEV otherwise */
static int max6650_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int address = client->addr;
dev_dbg(&adapter->dev, "max6650_detect called\n");
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_dbg(&adapter->dev, "max6650: I2C bus doesn't support "
"byte read mode, skipping.\n");
return -ENODEV;
}
if (((i2c_smbus_read_byte_data(client, MAX6650_REG_CONFIG) & 0xC0)
||(i2c_smbus_read_byte_data(client, MAX6650_REG_GPIO_STAT) & 0xE0)
||(i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN) & 0xE0)
||(i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM) & 0xE0)
||(i2c_smbus_read_byte_data(client, MAX6650_REG_COUNT) & 0xFC))) {
dev_dbg(&adapter->dev,
"max6650: detection failed at 0x%02x.\n", address);
return -ENODEV;
}
dev_info(&adapter->dev, "max6650: chip found at 0x%02x.\n", address);
strlcpy(info->type, "max6650", I2C_NAME_SIZE);
return 0;
}
static int max6650_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{