linux-kernel - [PATCH v2 0/2] gpio: sim: lock simulated GPIOs as interrupts

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Date: Mon, 24 Jun 2024 11:39:31 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v2 0/2] gpio: sim: lock simulated GPIOs as interrupts

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

I realized that the gpio-sim module doesn't lock the GPIOs as interrupts
when they are requested from the irq_sim. This leads to users being able
to change the direction of GPIOs that should remain as inputs to output.
This series extends the irq_sim interface and allows users to supply
callbacks that will be executed to inform users about interrupts being
requested and released so that they can act accordingly. The gpio-sim is
made to use this new API and lock GPIOs as interrupts when needed.

Thomas: if this is fine with you, can you Ack it so that I can take it
through the GPIO tree for the next merge window?

Changes since v1:
- drop the notifier in favor of specific callbacks

Bartosz Golaszewski (2):
  genirq/irq_sim: add an extended irq_sim initializer
  gpio: sim: lock GPIOs as interrupts when they are requested

 drivers/gpio/gpio-sim.c | 25 ++++++++++++++++-
 include/linux/irq_sim.h | 17 ++++++++++++
 kernel/irq/irq_sim.c    | 60 ++++++++++++++++++++++++++++++++++++++---
 3 files changed, 98 insertions(+), 4 deletions(-)

-- 
2.43.0