The PFC core calls the gpio module gpiochip registration in its
register_sh_pfc() function, itself called at arch initialization time.
If the gpio module isn't present then the gpiochip will never be
registered.
As the gpio module can only be present at arch initialization time if
it's builtin, there's no point in allowing to build it as a module. Make
it a boolean option, and initialize it synchronously with the core if
selected.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
The PFC core is only used by the pinctrl and gpio modules. As the gpio
module depends on the pinctrl module, the pinctrl module will always be
present if the core gets used. There is thus no point in keeping core
and pinctrl in two seperate modules. Merge them.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This begins the migration of the PFC core to the pinctrl subsystem.
Initial support is very basic, with the bulk of the implementation simply
being nopped out in such a way to allow registration with the pinctrl
core to succeed.
The gpio chip driver is stripped down considerably now relying purely on
pinctrl API calls to manage the bulk of its operations.
This provides a basis for further PFC refactoring, including decoupling
pin functions from the GPIO API, establishing pin groups, and so forth.
These will all be dealt with incrementally so as to introduce as few
growing and migratory pains to tree-wide PFC pinmux users today.
When the interfaces have been well established and in-tree users have
been migrated off of the legacy interfaces it will be possible to strip
down the core considerably, leading to eventual drivers/pinctrl rehoming.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This follows the intc/clk changes and shuffles the PFC support code under
its own directory. This will facilitate better code sharing, and allow us
to trim down the exported interface by quite a margin.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
