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authorRobert Coulson <rob.coulson@gmail.com>2013-05-23 18:22:22 +0200
committerGuenter Roeck <linux@roeck-us.net>2013-06-27 19:29:02 +0200
commited7c34e89d1e9d07f787a51571be0b96ae93d678 (patch)
tree9ed1edda458a6aa57f23ab07e68c042fbb69b63b /drivers/hwmon/ds1621.c
parenthwmon: (ds1621) Add ds1631 chip support to ds1621 driver and documentation (diff)
downloadlinux-ed7c34e89d1e9d07f787a51571be0b96ae93d678.tar.xz
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hwmon: (ds1621) Remove detect function
Due to a lack of device and vendor identification registers, the Dallas/Maxim DS16xx devices cannot be uniquely detected, sometimes resulting in false positives. Therefore, the detect function is being removed in favor of explicit device instantiation. Signed-off-by: Robert Coulson <rob.coulson@gmail.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/ds1621.c')
-rw-r--r--drivers/hwmon/ds1621.c48
1 files changed, 0 insertions, 48 deletions
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index 98adf77fdc84..8e940ad9cb36 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -46,10 +46,6 @@
#include <linux/sysfs.h>
#include <linux/kernel.h>
-/* Addresses to scan */
-static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
- 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
-
/* Supported devices */
enum chips { ds1621, ds1625, ds1631, ds1721 };
@@ -358,48 +354,6 @@ static const struct attribute_group ds1621_group = {
.is_visible = ds1621_attribute_visible
};
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int ds1621_detect(struct i2c_client *client,
- struct i2c_board_info *info)
-{
- struct i2c_adapter *adapter = client->adapter;
- int conf, temp;
- int i;
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
- | I2C_FUNC_SMBUS_WORD_DATA
- | I2C_FUNC_SMBUS_WRITE_BYTE))
- return -ENODEV;
-
- /*
- * Now, we do the remaining detection. It is lousy.
- *
- * The NVB bit should be low if no EEPROM write has been requested
- * during the latest 10ms, which is highly improbable in our case.
- */
- conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
- if (conf < 0 || conf & DS1621_REG_CONFIG_NVB)
- return -ENODEV;
- /*
- * The ds1621 & ds1625 use 9-bit resolution, so the 7 lowest bits
- * of the temperature should always be 0 (NOTE: The other chips
- * have multi-resolution support, so if they have 9-bit resolution
- * configured and the min/max temperature values set accordingly,
- * then if not explicitly instantiated, they *will* appear as and
- * emulate a ds1621 device).
- */
- for (i = 0; i < ARRAY_SIZE(DS1621_REG_TEMP); i++) {
- temp = i2c_smbus_read_word_data(client, DS1621_REG_TEMP[i]);
- if (temp < 0 || (temp & 0x7f00))
- return -ENODEV;
- }
-
- strlcpy(info->type, "ds1621", I2C_NAME_SIZE);
-
- return 0;
-}
-
static int ds1621_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -465,8 +419,6 @@ static struct i2c_driver ds1621_driver = {
.probe = ds1621_probe,
.remove = ds1621_remove,
.id_table = ds1621_id,
- .detect = ds1621_detect,
- .address_list = normal_i2c,
};
module_i2c_driver(ds1621_driver);