From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Hovold Subject: Re: [PATCH v10 1/3] mfd: add support for Diolan DLN-2 devices Date: Wed, 5 Nov 2014 18:11:03 +0100 Message-ID: <20141105171103.GA21212@localhost> References: <1415207101-16461-1-git-send-email-octavian.purdila@intel.com> <1415207101-16461-2-git-send-email-octavian.purdila@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1415207101-16461-2-git-send-email-octavian.purdila@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Octavian Purdila Cc: gregkh@linuxfoundation.org, linus.walleij@linaro.org, gnurou@gmail.com, wsa@the-dreams.de, sameo@linux.intel.com, lee.jones@linaro.org, arnd@arndb.de, johan@kernel.org, daniel.baluta@intel.com, laurentiu.palcu@intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org List-Id: linux-gpio@vger.kernel.org On Wed, Nov 05, 2014 at 07:04:59PM +0200, Octavian Purdila wrote: > This patch implements the USB part of the Diolan USB-I2C/SPI/GPIO > Master Adapter DLN-2. Details about the device can be found here: > > https://www.diolan.com/i2c/i2c_interface.html. > > Information about the USB protocol can be found in the Programmer's > Reference Manual [1], see section 1.7. > > Because the hardware has a single transmit endpoint and a single > receive endpoint the communication between the various DLN2 drivers > and the hardware will be muxed/demuxed by this driver. > > Each DLN2 module will be identified by the handle field within the DLN2 > message header. If a DLN2 module issues multiple commands in parallel > they will be identified by the echo counter field in the message header. > > The DLN2 modules can use the dln2_transfer() function to issue a > command and wait for its response. They can also register a callback > that is going to be called when a specific event id is generated by > the device (e.g. GPIO interrupts). The device uses handle 0 for > sending events. > > [1] https://www.diolan.com/downloads/dln-api-manual.pdf > > Signed-off-by: Octavian Purdila Reviewed-by: Johan Hovold Just noticed checkpatch complains about two typos in the header file (since v9?). ;) Thanks, Johan