linux-kernel - [PATCH 0/3] Introduce gpio-pseudo, common utilities for pseudo GPIO devices

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Message-ID: <20250217142758.540601-1-koichiro.den@canonical.com>
Date: Mon, 17 Feb 2025 23:27:55 +0900
From: Koichiro Den <koichiro.den@...onical.com>
To: linux-gpio@...r.kernel.org
Cc: brgl@...ev.pl,
	geert+renesas@...der.be,
	linus.walleij@...aro.org,
	maciej.borzecki@...onical.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] Introduce gpio-pseudo, common utilities for pseudo GPIO devices

This patch series introduces a utility for pseudo GPIO devices to reduce
code duplication. There are no functional changes.

In this series, only gpio-sim and gpio-virtuser are updated to use
gpio-pseudo, as the current gpio-aggregator does not benefit from it at
all. A follow-up patch series that introduces a configfs interface for
gpio-aggregator will convert it to use gpio-pseudo as well.

This work originated from a suggestion by Bartosz:
https://lore.kernel.org/all/CAMRc=MfcooZXBqVpbQ0ak+8LGsPDzwKSN3Zfb0eZDx1Bx4duzQ@mail.gmail.com/

N.B. this submission is based on the latest gpio/for-next as of writing:
f04867a5d0d3 ("gpio: loongson-64bit: Remove unneeded ngpio assignment").

Koichiro Den (3):
  gpio: pseudo: common helper functions for pseudo gpio devices
  gpio: sim: convert to use gpio-pseudo utilities
  gpio: virtuser: convert to use gpio-pseudo utilities

 drivers/gpio/Kconfig         |  6 +++
 drivers/gpio/Makefile        |  1 +
 drivers/gpio/gpio-pseudo.c   | 86 ++++++++++++++++++++++++++++++++++++
 drivers/gpio/gpio-pseudo.h   | 24 ++++++++++
 drivers/gpio/gpio-sim.c      | 84 +++++------------------------------
 drivers/gpio/gpio-virtuser.c | 73 +++++-------------------------
 6 files changed, 139 insertions(+), 135 deletions(-)
 create mode 100644 drivers/gpio/gpio-pseudo.c
 create mode 100644 drivers/gpio/gpio-pseudo.h

-- 
2.45.2