The "method" parameter was part of the original port of the driver from
the kernel.  At some point this may have been added to allow for future
differentiation (as omap1 and omap2 have different GPIO IP blocks, so
this wasn't an unreasonable thing to do).  At this point however it's
just extra overhead, so drop.
Signed-off-by: NTom Rini <trini@konsulko.com>

Add driver model support to this driver, while retaining support for the
legacy system. Driver model GPIO support is enabled with CONFIG_DM_GPIO
as usual.

Since gpio_is_valid() no longer exists, we can use the -EINVAL error
returned from gpio_request().
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NTom Rini <trini@ti.com>

Unlike the other patches in this series so far, this commit fixes a
ambiguity in the license terms for some OMAP files:  the code was
originally derived from the Linux kernel sources, where it was clearly
marked as GPL-2.0 (i. e. without the "or later" part), but the U-Boot
version had a GPL-2.0+ file header added, apparently without
permission / relicensing from the original authors of the code.

Insert a GPL-2.0 SPDX-License-Identifier to fix this.
Signed-off-by: NWolfgang Denk <wd@denx.de>
cc: Tom Rix <Tom.Rix@windriver.com>
Cc: Tom Rini <trini@ti.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Acked-by: NTom Rini <trini@ti.com>

Add gpio_is_valid() to omap_gpio API
Signed-off-by: NNikita Kiryanov <nikita@compulab.co.il>
Signed-off-by: NIgor Grinberg <grinberg@compulab.co.il>

Convert all OMAP specific functions to use the common API
definitions in include/asm/gpio.h. In the process, made
few additional changes:
 - Use -EINVAL consistently. -1 was used in many places.
 - Removed one-liner static functions that were used only
   once. Replaced the content as necessary.
 - Combines implementation of functions omap_get_gpio_dataout()
   and omap_get_gpio_datain(). To do so, new static function
   _get_gpio_direction() was added.
Signed-off-by: NSanjeev Premi <premi@ti.com>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

Read directly from OMAP_GPIO_DATAOUT to get the output state of the GPIO pin
Signed-off-by: NJoel A Fernandes <agnel.joel@gmail.com>
Signed-off-by: NJason Kridner <jkridner@beagleboard.org>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

Signed-off-by: NAneesh V <aneesh@ti.com>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

This helps to clean up the include/ directory so that it only contains
non-architecture-specific headers and also matches Linux's directory
layout which many U-Boot developers are already familiar with.
Signed-off-by: NPeter Tyser <ptyser@xes-inc.com>

Port version 2.6.27 of the linux kernel's omap gpio interface to u-boot.
The orignal source is in linux/arch/arm/plat-omap/gpio.c

See doc/README.omap3 for instructions on use.
Signed-off-by: NTom Rix <Tom.Rix@windriver.com>