kernel/linux.git/drivers/pinctrl/core.h, branch v6.1.168

pinctrl: Allow modules to use pinctrl_[un]register_mappings

2019-12-30T13:27:17+00:00

Currently only the drivers/pinctrl/devicetree.c code allows registering pinctrl-mappings which may later be unregistered, all other mappings are assumed to be permanent. Non-dt platforms may also want to register pinctrl mappings from code which is build as a module, which requires being able to unregister the mapping when the module is unloaded to avoid dangling pointers. To allow unregistering the mappings the devicetree code uses 2 internal functions: pinctrl_register_map and pinctrl_unregister_map. pinctrl_register_map allows the devicetree code to tell the core to not memdup the mappings as it retains ownership of them and pinctrl_unregister_map does the unregistering, note this only works when the mappings where not memdupped. The only code relying on the memdup/shallow-copy done by pinctrl_register_mappings is arch/arm/mach-u300/core.c this commit replaces the __initdata with const, so that the shallow-copy is no longer necessary. After that we can get rid of the internal pinctrl_unregister_map function and just use pinctrl_register_mappings directly everywhere. This commit also renames pinctrl_unregister_map to pinctrl_unregister_mappings so that its naming matches its pinctrl_register_mappings counter-part and exports it. Together these 2 changes will allow non-dt platform code to register pinctrl-mappings from modules without breaking things on module unload (as they can now unregister the mapping on unload). Signed-off-by: Hans de Goede Link: https://lore.kernel.org/r/20191216205122.1850923-2-hdegoede@redhat.com Signed-off-by: Linus Walleij

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194

2019-05-30T18:29:22+00:00

Based on 1 normalized pattern(s): license terms gnu general public license gpl version 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 161 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Alexios Zavras Reviewed-by: Steve Winslow Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de Signed-off-by: Greg Kroah-Hartman

pinctrl: core: Remove broken remove_last group and pinmux functions

2018-07-17T08:49:49+00:00

With no users left for these functions let's remove them. Reported-by: H. Nikolaus Schaller Cc: Christ van Willegen Cc: Haojian Zhuang Cc: Jacopo Mondi Cc: Paul Cercueil Cc: Sean Wang Signed-off-by: Tony Lindgren Tested-By: H. Nikolaus Schaller Reviewed-by: Andy Shevchenko Signed-off-by: Linus Walleij

pinctrl/gpio: Unify namespace for cross-calls

2017-09-22T09:02:10+00:00

The pinctrl_request_gpio() and pinctrl_free_gpio() break the nice namespacing in the other cross-calls like pinctrl_gpio_foo(). Just rename them and all references so we have one namespace with all cross-calls under pinctrl_gpio_*(). Signed-off-by: Linus Walleij

pinctrl: move const qualifier before struct

2017-08-14T13:01:02+00:00

Update subsystem wide for consistency. Signed-off-by: Masahiro Yamada Signed-off-by: Linus Walleij

pinctrl: core: Fix regression caused by delayed work for hogs

2017-01-13T15:25:17+00:00

Commit df61b366af26 ("pinctrl: core: Use delayed work for hogs") caused a regression at least with sh-pfc that is also a GPIO controller as noted by Geert Uytterhoeven . As the original pinctrl_register() has issues calling pin controller driver functions early before the controller has finished registering, we can't just revert commit df61b366af26. That would break the drivers using GENERIC_PINCTRL_GROUPS or GENERIC_PINMUX_FUNCTIONS. So let's fix the issue with the following steps as a single patch: 1. Revert the late_init parts of commit df61b366af26. The late_init clearly won't work and we have to just give up on fixing pinctrl_register() for GENERIC_PINCTRL_GROUPS and GENERIC_PINMUX_FUNCTIONS. 2. Split pinctrl_register() into two parts By splitting pinctrl_register() into pinctrl_init_controller() and pinctrl_create_and_start() we have better control over when it's safe to call pinctrl_create(). 3. Introduce a new pinctrl_register_and_init() function As suggested by Linus Walleij , we can just introduce a new function for the controllers that need pinctrl_create() called later. 4. Convert the four known problem cases to use new function Let's convert pinctrl-imx, pinctrl-single, sh-pfc and ti-iodelay to use the new function to fix the issues. The rest of the drivers can be converted later. Let's also update Documentation/pinctrl.txt accordingly because of the known issues with pinctrl_register(). Fixes: df61b366af26 ("pinctrl: core: Use delayed work for hogs") Reported-by: Geert Uytterhoeven Cc: Gary Bisson Signed-off-by: Tony Lindgren Tested-by: Geert Uytterhoeven Signed-off-by: Linus Walleij

pinctrl: core: Add generic pinctrl functions for managing groups

2017-01-03T08:26:18+00:00

We can add generic helpers for function handling for cases where the pin controller driver does not need to use static arrays. Signed-off-by: Tony Lindgren [Renamed the Kconfig item and moved things around] Signed-off-by: Linus Walleij

pinctrl: stricten up generic group code

2017-01-03T08:26:18+00:00

Rename the symbol PINCTRL_GENERIC to PINCTRL_GENERIC_GROUPS since it all pertains to groups. Replace everywhere. ifdef out the radix tree and the struct when not using the generic groups. Cc: Tony Lindgren Signed-off-by: Linus Walleij

pinctrl: core: Add generic pinctrl functions for managing groups

2017-01-03T08:26:17+00:00

We can add generic helpers for pin group handling for cases where the pin controller driver does not need to use static arrays. Signed-off-by: Tony Lindgren Signed-off-by: Linus Walleij

pinctrl: core: Use delayed work for hogs

2017-01-03T08:26:16+00:00

Having the pin control framework call pin controller functions before it's probe has finished is not nice as the pin controller device driver does not yet have struct pinctrl_dev handle. Let's fix this issue by adding deferred work for late init. This is needed to be able to add pinctrl generic helper functions that expect to know struct pinctrl_dev handle. Note that we now need to call create_pinctrl() directly as we don't want to add the pin controller to the list of controllers until the hogs are claimed. We also need to pass the pinctrl_dev to the device tree parser functions as they otherwise won't find the right controller at this point. Signed-off-by: Tony Lindgren Signed-off-by: Linus Walleij