linux-kernel - [PATCH v2 0/4] gpio: aggregator: Incorporate gpio-delay functionality

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Message-Id: <20230614231446.3687-1-andriy.shevchenko@linux.intel.com>
Date:   Thu, 15 Jun 2023 02:14:42 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v2 0/4] gpio: aggregator: Incorporate gpio-delay functionality

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!

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

Not in v2:
- updated DT description to note about long timeouts in atomic mode
- sysfs hiding for gpio-delay functionality
- used msleep(): the documentation is _against_ this

Andy Shevchenko (4):
  gpio: aggregator: Remove CONFIG_OF and of_match_ptr() protections
  gpio: aggregator: Support delay for setting up individual GPIOs
  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 | 109 ++++++++++++++++++++--
 drivers/gpio/gpio-delay.c      | 164 ---------------------------------
 4 files changed, 103 insertions(+), 180 deletions(-)
 delete mode 100644 drivers/gpio/gpio-delay.c

-- 
2.40.0.1.gaa8946217a0b