From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Post Subject: Driver-Support of I2C_M_RECV_LEN Date: Fri, 20 Jun 2014 14:03:45 +0200 Message-ID: <53A42321.5020701@web.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-i2c@vger.kernel.org Hello, in the documentation i found at http://ww2.cs.fsu.edu/~rosentha/linux/2.6.26.5/docs/DocBook/kernel-api/re1222.html the following sentence: "Note that using this function requires that the client's adapter support the I2C_FUNC_SMBUS_READ_BLOCK_DATA functionality. Not all adapter drivers support this; its emulation through I2C messaging relies on a specific mechanism (I2C_M_RECV_LEN) which may not be implemented." The second sentence says that the mechanism I2C_M_RECV_LEN is not all over implemented. How i can figure out whether this mechanism will be provided of my driver? What is the alternative of using the function i2c_smbus_read_block_data? Thanks a lot for your support, Michael Post