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Commit 21bbd691 authored by Jean Delvare's avatar Jean Delvare Committed by Greg Kroah-Hartman
Browse files

[PATCH] I2C: Resurrect i2c_smbus_write_i2c_block_data. 



Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 8254fc4a

drivers/i2c/i2c-core.c

+15 −0
Original line number Diff line number Diff line
@@ -946,6 +946,20 @@ s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client, u8 command, u8 *val 
	}

}



s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client, u8 command,

				   u8 length, u8 *values)

{

	union i2c_smbus_data data;



	if (length > I2C_SMBUS_BLOCK_MAX)

		length = I2C_SMBUS_BLOCK_MAX;

	data.block[0] = length;

	memcpy(data.block + 1, values, length);

	return i2c_smbus_xfer(client->adapter, client->addr, client->flags,

			      I2C_SMBUS_WRITE, command,

			      I2C_SMBUS_I2C_BLOCK_DATA, &data);

}



/* Simulate a SMBus command using the i2c protocol 

   No checking of parameters is done!  */

static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr,
@@ -1150,6 +1164,7 @@ EXPORT_SYMBOL(i2c_smbus_read_word_data); 
EXPORT_SYMBOL(i2c_smbus_write_word_data);

EXPORT_SYMBOL(i2c_smbus_write_block_data);

EXPORT_SYMBOL(i2c_smbus_read_i2c_block_data);

EXPORT_SYMBOL(i2c_smbus_write_i2c_block_data);



MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");

MODULE_DESCRIPTION("I2C-Bus main module");

include/linux/i2c.h

+3 −0
Original line number Diff line number Diff line
@@ -100,6 +100,9 @@ extern s32 i2c_smbus_write_block_data(struct i2c_client * client, 
/* Returns the number of read bytes */

extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,

					 u8 command, u8 *values);

extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,

					  u8 command, u8 length,

					  u8 *values);



/*

 * A driver is capable of handling one or more physical devices present on