The Nokia N900's modem is connected via Synchronous Serial Interface (SSI),
which is a legacy version of MIPI's High-speed Synchronous Serial Interface
(HSI).

The handles the GPIOs for enabling and resetting the modem and instanciates
ssi-protocol for data exchange. It does not yet support exchanging voice data
with the modem.
Signed-off-by: NSebastian Reichel <sre@kernel.org>
Reviewed-by: NPavel Machek <pavel@ucw.cz>
Tested-By: NIvaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>

This adds a driver for the SSI McSAAB protocol as used in
the Nokia N900.
Signed-off-by: NCarlos Chinea <carlos.chinea@nokia.com>
Signed-off-by: NSebastian Reichel <sre@kernel.org>
Tested-By: NIvaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>

Make HSI channel ids platform data, which can be provided
by platform data.
Signed-off-by: NSebastian Reichel <sre@kernel.org>
Tested-By: NIvaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>

Fix return code check of alloc_chrdev_region, which
returns 0 on success.
Signed-off-by: NSebastian Reichel <sre@kernel.org>
Reviewed-by: NPavel Machek <pavel@ucw.cz>

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove max_data_size sysfs entry. Otherwise is possible
to have a buffer overrun if its value is increased after
the device is open.
Signed-off-by: NCarlos Chinea <carlos.chinea@nokia.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>

Add HSI character device kernel configuration
Signed-off-by: NAndras Domokos <andras.domokos@nokia.com>
Signed-off-by: NCarlos Chinea <carlos.chinea@nokia.com>

Add HSI char device driver to the kernel.
Signed-off-by: NAndras Domokos <andras.domokos@nokia.com>
Signed-off-by: NCarlos Chinea <carlos.chinea@nokia.com>