There is no point in implementing a detect callback for the DS2482, as this device can't be detected. It was there solely to handle "force" module parameters to instantiate devices, but now we have a better sysfs interface that can do the same.
So we can get rid of the ugly module parameters and the detect callback. This shrinks the binary module size by 21%. Signed-off-by: Jean Delvare <[email protected]> Cc: Ben Gardner <[email protected]> --- Documentation/w1/masters/ds2482 | 6 +++--- drivers/w1/masters/ds2482.c | 35 +++++------------------------------ 2 files changed, 8 insertions(+), 33 deletions(-) --- linux-2.6.32-pre.orig/Documentation/w1/masters/ds2482 2009-06-10 05:05:27.000000000 +0200 +++ linux-2.6.32-pre/Documentation/w1/masters/ds2482 2009-09-20 13:33:54.000000000 +0200 @@ -24,8 +24,8 @@ General Remarks Valid addresses are 0x18, 0x19, 0x1a, and 0x1b. However, the device cannot be detected without writing to the i2c bus, so no -detection is done. -You should force the device address. +detection is done. You should instantiate the device explicitly. -$ modprobe ds2482 force=0,0x18 +$ modprobe ds2482 +$ echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-0/new_device --- linux-2.6.32-pre.orig/drivers/w1/masters/ds2482.c 2009-09-20 10:52:20.000000000 +0200 +++ linux-2.6.32-pre/drivers/w1/masters/ds2482.c 2009-09-20 12:18:25.000000000 +0200 @@ -24,19 +24,6 @@ #include "../w1_int.h" /** - * Address is selected using 2 pins, resulting in 4 possible addresses. - * 0x18, 0x19, 0x1a, 0x1b - * However, the chip cannot be detected without doing an i2c write, - * so use the force module parameter. - */ -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/** - * Insmod parameters - */ -I2C_CLIENT_INSMOD_1(ds2482); - -/** * The DS2482 registers - there are 3 registers that are addressed by a read * pointer. The read pointer is set by the last command executed. * @@ -96,8 +83,6 @@ static const u8 ds2482_chan_rd[8] = static int ds2482_probe(struct i2c_client *client, const struct i2c_device_id *id); -static int ds2482_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info); static int ds2482_remove(struct i2c_client *client); @@ -117,8 +102,6 @@ static struct i2c_driver ds2482_driver = .probe = ds2482_probe, .remove = ds2482_remove, .id_table = ds2482_id, - .detect = ds2482_detect, - .address_data = &addr_data, }; /* @@ -425,19 +408,6 @@ static u8 ds2482_w1_reset_bus(void *data } -static int ds2482_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info) -{ - if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WRITE_BYTE_DATA | - I2C_FUNC_SMBUS_BYTE)) - return -ENODEV; - - strlcpy(info->type, "ds2482", I2C_NAME_SIZE); - - return 0; -} - static int ds2482_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -446,6 +416,11 @@ static int ds2482_probe(struct i2c_clien int temp1; int idx; + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WRITE_BYTE_DATA | + I2C_FUNC_SMBUS_BYTE)) + return -ENODEV; + if (!(data = kzalloc(sizeof(struct ds2482_data), GFP_KERNEL))) { err = -ENOMEM; goto exit; -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
