staging: olpc_dcon: allow simultaneous XO-1 and XO-1.5 support

This patch remove model related configuration.
Since the module can decide which platform data to use itself base on
current running olpc board.

Also change module dependency from (GPIO_CS5535 || GPIO_CS5535=n)
to (GPIO_CS5535 || ACPI) because original one does not make any sense
and module only doing real work when GPIO_CS5535 or ACPI is setted.

Remove kernel configurations:
- FB_OLPC_DCON_1
- FB_OLPC_DCON_1_5

Signed-off-by: Jerry Lin <wahahab11@gmail.com>
Link: https://lore.kernel.org/r/20190906010613.GA562@compute1
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: olpc_dcon: Remove TODO item

All uses of old GPIO API have been converted to new API.
This item can be removed from TODO file.

Signed-off-by: Jerry Lin <wahahab11@gmail.com>
Link: https://lore.kernel.org/r/20190729023544.GA25930@compute1
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging/olpc_dcon: Add drm conversion to TODO

this driver is pretty horrible from a design pov, and needs a complete
overhaul. Concrete thing that annoys me is that it looks at
registered_fb, which is an internal thing to fbmem.c and fbcon.c. And
ofc it gets the lifetime rules all wrong (it should at least use
get/put_fb_info).

Looking at the history, there's been an attempt at dropping this from
staging in 2016, but that had to be reverted. Since then not real
effort except the usual stream of trivial patches, and fbdev has been
formally closed for any new hw support. Time to try again and drop
this?

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190528090304.9388-33-daniel.vetter@ffwll.ch

staging: olpc_dcon: Augment TODO file with GPIO work item

To make sure that this driver does not leave staging before it
is properly converted to use the new GPIO descriptor API,
augment the TODO file with this work item.

Cc: Andres Salomon <dilinger@queued.net>
Cc: Jens Frederich <jfrederich@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Revert "Staging: olpc_dcon: Remove obsolete driver"

This reverts commit 82ef33af9dd30075adbd9f3dd161b606b8ba88ac. It turns
out these machines are still out there, and the original patch broke
them. So revert it, adding back the driver, so people's machines still
work properly.

Reported-by: James Cameron <quozl@laptop.org>
Cc: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Staging: olpc_dcon: Remove obsolete driver

Remove support for One Laptop Per Child organization since it is dead.
http://www.olpcnews.com/about_olpc_news/goodbye_one_laptop_per_child.html

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Staging: olpc_dcon: Removed more completed TODO entries

1. Console event notifier support: No one I've asked knows what this
all about.
2. Audit code for unnecessary code: This is done.
3. Verify sane i2cAPI usage: This is also done.

Signed-off-by: Jens Frederich <jfrederich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Staging: olpc_dcon: Already completed TODO entry removed

The TODO entry - drop global variables, use a proper olpc_dcon_priv
struct - is already finished. The driver has no global variables.
It uses the private structure 'dcon_priv'.

Signed-off-by: Jens Frederich <jfrederich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Staging: olpc_dcon: updating MAINTAINERS

Andres Salomon and Chris Ball are not longer at OLPC.
Daniel Drake is the new OLPC go-to guy. And I wanna
also be CC'd on DCON and other OLPC patches.

Signed-off-by: Jens Frederich <jfrederich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: olpc_dcon: provide detailed FB_OLPC_DCON help section

The FB_OLPC_DCON help section is to short according to checkpatch.pl.
We want more information about the controller type, its task, its video
pipeline position and so on.

There are no style issues, remove checkpatch.pl TODO entry.

Signed-off-by: Jens Frederich <jfrederich@gmail.com>
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/olpc_dcon: convert to new cs5535 gpio API

Drop the old geode_gpio crud, as well as the raw outl() calls; instead,
use the Linux GPIO API where possible, and the cs5535_gpio API in other
places.

Note that we don't actually clean up the driver properly yet (once loaded,
it always remains loaded). That'll come later..

This patch is necessary for building the driver.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

staging: olpc_dcon: add people to the Cc list

Some additional folks requested to be Cc'd for OLPC-DCON changes; add them
to the TODO file.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

staging: olpc_dcon: add TODO file

Add and populate a TODO file for the olpc_dcon driver.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>