linux-stable/Documentation/devicetree
Marek Behún f84aa271ae pinctrl: armada-37xx: Correct PWM pins definitions
commit baf8d6899b upstream.

The PWM pins on North Bridge on Armada 37xx can be configured into PWM
or GPIO functions. When in PWM function, each pin can also be configured
to drive low on 0 and tri-state on 1 (LED mode).

The current definitions handle this by declaring two pin groups for each
pin:
- group "pwmN" with functions "pwm" and "gpio"
- group "ledN_od" ("od" for open drain) with functions "led" and "gpio"

This is semantically incorrect. The correct definition for each pin
should be one group with three functions: "pwm", "led" and "gpio".

Change the "pwmN" groups to support "led" function.

Remove "ledN_od" groups. This cannot break backwards compatibility with
older device trees: no device tree uses it since there is no PWM driver
for this SOC yet. Also "ledN_od" groups are not even documented.

Fixes: b835d69530 ("pinctrl: armada-37xx: swap polarity on LED group")
Signed-off-by: Marek Behún <kabel@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210719112938.27594-1-kabel@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-08 08:46:51 +01:00
..
bindings pinctrl: armada-37xx: Correct PWM pins definitions 2021-12-08 08:46:51 +01:00
00-INDEX
booting-without-of.txt dt-bindings: update OpenFirmware document links to devicetree.org 2017-08-01 12:24:07 -05:00
changesets.txt
dynamic-resolution-notes.txt
of_unittest.txt
overlay-notes.txt Documentation: remove overlay-notes reference to non-existent file 2017-06-22 11:14:01 -05:00
todo.txt
usage-model.txt of: update ePAPR references to point to Devicetree Specification 2017-06-22 11:22:06 -05:00