[PATCH v3 0/5] gpio: aggregator: Incorporate gpio-delay functionality

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

The newly appeared gpio-delay module enables external signal delay lines
that may be connected to the GPIOs. But at the same time it copies the
GPIO forwarder functionality. Besides that the approach does not scale.
If we would have another external component, we would need yet another
driver. That's why I think, and seems others support me, better to
enable such a functionality inside GPIO aggregator driver.

Patch 1 is a cleanup that may be applied independently on the decision
about the rest.

Please, test and comment! Alexander, I would appreciate your tag.

In v3:
- added new patch 3 to prevent device removal from sysfs
- switched to feature in driver data instead of "compatible" (Geert)
- applied tags (Geert, Linus)
- left DT bindings untouched, can be amended later on

In v2:
- split as a series
- covered CONFIG_OF_GPIO=n case
- removed the gpio-delay
- moved gpio-delay Kconfig help to the comment in the code
- left udelay() call untouched as recommended by documentation

Andy Shevchenko (5):
  gpio: aggregator: Remove CONFIG_OF and of_match_ptr() protections
  gpio: aggregator: Support delay for setting up individual GPIOs
  gpio: aggregator: Prevent collisions between DT and user device IDs
  gpio: aggregator: Set up a parser of delay line parameters
  gpio: delay: Remove duplicative functionality

 drivers/gpio/Kconfig           |   9 --
 drivers/gpio/Makefile          |   1 -
 drivers/gpio/gpio-aggregator.c | 113 +++++++++++++++++++++--
 drivers/gpio/gpio-delay.c      | 164 ---------------------------------
 4 files changed, 106 insertions(+), 181 deletions(-)
 delete mode 100644 drivers/gpio/gpio-delay.c

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2.40.0.1.gaa8946217a0b