linux-kernel - [PATCH 0/2] gpio: Add gpio-latch driver

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Message-Id: <20220825094132.1268174-1-s.hauer@pengutronix.de>
Date:   Thu, 25 Aug 2022 11:41:30 +0200
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     linux-gpio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>, kernel@...gutronix.de,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 0/2] gpio: Add gpio-latch driver

This adds a gpio-driver which multiplexes existing GPIOs using latches.
Uwe asked [1] if that would be accectable as a new gpio driver, and here
is the result. For a better description what this is all about have a
look at the drawings in the patches.

The driver is pretty much straight forward. The only thing I wasn't sure
about is in which category in Kconfig the driver should be sorted in. I
decided for "Virtual GPIO drivers" which is not an exact match, but the
best I could find in the existing categories.

Sascha

[1] https://lore.kernel.org/all/CACRpkdaBO=JzokGUF6uXZc7ASVD7LjqBxTLGwX-FShM=A9gw9A@mail.gmail.com/t/

Sascha Hauer (2):
  gpio: Add gpio latch driver
  dt-bindings: gpio: Add gpio-latch binding document

 .../devicetree/bindings/gpio/gpio-latch.yaml  |  83 ++++++++
 drivers/gpio/Kconfig                          |   6 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-latch.c                     | 188 ++++++++++++++++++
 4 files changed, 278 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-latch.yaml
 create mode 100644 drivers/gpio/gpio-latch.c

-- 
2.30.2