kernel/git/next/linux-next.git/Documentation/pinctrl.txt, branch master

pinctrl.txt: move it to the driver-api book

2017-06-20T11:11:14+00:00

As pinctrl describes a feature from drivers/base, place it at the right book. Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Linus Walleij

pinctrl: pinctrl.txt: standardize document format

2017-05-23T09:11:01+00:00

Each text file under Documentation follows a different format. Some doesn't even have titles! Change its representation to follow the adopted standard, using ReST markups for it to be parseable by Sphinx. This document is almost following the standard stile. There are only two things to adjust on it: - promote the level of the document title; - mark literal blocks as such. Signed-off-by: Mauro Carvalho Chehab [Fix some indentations] Signed-off-by: Linus Walleij

pinctrl: core: Fix pinctrl_register_and_init() with pinctrl_enable()

2017-04-06T23:08:08+00:00

Recent pinctrl changes to allow dynamic allocation of pins exposed one more issue with the pinctrl pins claimed early by the controller itself. This caused a regression for IMX6 pinctrl hogs. Before enabling the pin controller driver we need to wait until it has been properly initialized, then claim the hogs, and only then enable it. To fix the regression, split the code into pinctrl_claim_hogs() and pinctrl_enable(). And then let's require that pinctrl_enable() is always called by the pin controller driver when ready after calling pinctrl_register_and_init(). Depends-on: 950b0d91dc10 ("pinctrl: core: Fix regression caused by delayed work for hogs") Fixes: df61b366af26 ("pinctrl: core: Use delayed work for hogs") Fixes: e566fc11ea76 ("pinctrl: imx: use generic pinctrl helpers for managing groups") Cc: Haojian Zhuang Cc: Masahiro Yamada Cc: Mika Penttilä Cc: Mika Westerberg Cc: Nishanth Menon Cc: Shawn Guo Cc: Stefan Agner Tested-by: Geert Uytterhoeven Tested-by: Gary Bisson Tested-by: Fabio Estevam Signed-off-by: Tony Lindgren 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: Flag strict is a field in struct pinmux_ops

2016-06-23T08:50:10+00:00

Documentation incorrectly refers to struct pinctrl_desc, where no such flag is available. Replace the name of the struct. Fixes: commit 8c4c2016345f ("pinctrl: move strict option to pinmux_ops") Signed-off-by: Andy Shevchenko Signed-off-by: Linus Walleij

pinctrl: Reflow/wrap paragraph describing GPIO interaction

2016-06-13T07:33:42+00:00

Signed-off-by: Andrew Jeffery Signed-off-by: Linus Walleij

pinctrl: s/have/has/ in GPIO driver interaction description

2016-06-13T07:32:46+00:00

Signed-off-by: Andrew Jeffery Signed-off-by: Linus Walleij

pinctrl: Fix grammar in pinmux request list

2016-06-13T07:32:01+00:00

Signed-off-by: Andrew Jeffery Signed-off-by: Linus Walleij

pinctrl: move strict option to pinmux_ops

2015-05-06T12:45:19+00:00

While the pinmux_ops are ideally just a vtable for pin mux calls, the "strict" setting belongs so intuitively with the pin multiplexing that we should move it here anyway. Putting it in the top pinctrl_desc makes no sense. Cc: Sonic Zhang Signed-off-by: Linus Walleij

pinctrl: allow exlusive GPIO/mux pin allocation

2015-05-06T12:45:19+00:00

Disallow simultaneous use of the the GPIO and peripheral mux functions by setting a flag "strict" in struct pinctrl_desc. The blackfin pinmux and gpio controller doesn't allow user to set up a pin for both GPIO and peripheral function. So, add flag strict in struct pinctrl_desc to check both gpio_owner and mux_owner before approving the pin request. v2-changes: - if strict flag is set, check gpio_owner and mux_onwer in if and else clause v3-changes: - add kerneldoc for this struct - augment Documentation/pinctrl.txt Signed-off-by: Sonic Zhang Signed-off-by: Linus Walleij