diff --git a/Documentation/i2c/porting-clients b/Documentation/i2c/porting-clients index 5eb8d37cc679fef25ee3cce4e74de86e16e4069b..4849dfd6961c7d2ed2d21eb5e7a65cf72cf0b755 100644 --- a/Documentation/i2c/porting-clients +++ b/Documentation/i2c/porting-clients @@ -90,6 +90,8 @@ Technical changes: device_create_file. Move the driver initialization before any sysfs file creation. Drop client->id. + Drop any 24RF08 corruption prevention you find, as this is now done + at the i2c-core level, and doing it twice voids it. * [Init] Limits must not be set by the driver (can be done later in user-space). Chip should not be reset default (although a module diff --git a/drivers/i2c/chips/eeprom.c b/drivers/i2c/chips/eeprom.c index a27420a54c841e866acbe5ef3ac7a19cd31ef85d..d58403a479086d9b8660f85b0fcf5e4bbacbffe7 100644 --- a/drivers/i2c/chips/eeprom.c +++ b/drivers/i2c/chips/eeprom.c @@ -161,11 +161,6 @@ int eeprom_detect(struct i2c_adapter *adapter, int address, int kind) struct eeprom_data *data; int err = 0; - /* prevent 24RF08 corruption */ - if (kind < 0) - i2c_smbus_xfer(adapter, address, 0, 0, 0, - I2C_SMBUS_QUICK, NULL); - /* There are three ways we can read the EEPROM data: (1) I2C block reads (faster, but unsupported by most adapters) (2) Consecutive byte reads (100% overhead) diff --git a/drivers/i2c/chips/max6875.c b/drivers/i2c/chips/max6875.c index 31cee2d34a17ede7ce86ac96eb5ee0dd845c4594..9e1aeb69abf9fa1009e281e7a88f22e9aef21089 100644 --- a/drivers/i2c/chips/max6875.c +++ b/drivers/i2c/chips/max6875.c @@ -171,11 +171,6 @@ static int max6875_detect(struct i2c_adapter *adapter, int address, int kind) struct max6875_data *data; int err = 0; - /* Prevent 24rf08 corruption (in case of user error) */ - if (kind < 0) - i2c_smbus_xfer(adapter, address, 0, 0, 0, - I2C_SMBUS_QUICK, NULL); - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA | I2C_FUNC_SMBUS_READ_BYTE)) return 0; diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index bee0148dfab8c60a54651a7d96b9004bcfc87420..dda472e5e8be3bca0be40f383b2643048c3d0c51 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -679,9 +679,16 @@ static int i2c_probe_address(struct i2c_adapter *adapter, int addr, int kind, return 0; /* Make sure there is something at this address, unless forced */ - if (kind < 0 - && i2c_smbus_xfer(adapter, addr, 0, 0, 0, I2C_SMBUS_QUICK, NULL) < 0) - return 0; + if (kind < 0) { + if (i2c_smbus_xfer(adapter, addr, 0, 0, 0, + I2C_SMBUS_QUICK, NULL) < 0) + return 0; + + /* prevent 24RF08 corruption */ + if ((addr & ~0x0f) == 0x50) + i2c_smbus_xfer(adapter, addr, 0, 0, 0, + I2C_SMBUS_QUICK, NULL); + } /* Finally call the custom detection function */ err = found_proc(adapter, addr, kind);