linux-kernel - Re: [PATCH v7 1/6] soundwire: bus: Allow SoundWire peripherals to register IRQ handlers

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Date: Thu, 18 Jan 2024 18:16:05 +0200
From: andy.shevchenko@...il.com
To: Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc: broonie@...nel.org, lee@...nel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	linus.walleij@...aro.org, vkoul@...nel.org, lgirdwood@...il.com,
	yung-chuan.liao@...ux.intel.com, sanyog.r.kale@...el.com,
	pierre-louis.bossart@...ux.intel.com, alsa-devel@...a-project.org,
	patches@...nsource.cirrus.com, devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/6] soundwire: bus: Allow SoundWire peripherals to
 register IRQ handlers

Fri, Aug 04, 2023 at 11:45:57AM +0100, Charles Keepax kirjoitti:
> From: Lucas Tanure <tanureal@...nsource.cirrus.com>
> 
> Currently the in-band alerts for SoundWire peripherals can only
> be communicated to the driver through the interrupt_callback
> function. This however is slightly inconvenient for devices that wish
> to share IRQ handling code between SoundWire and I2C/SPI, the later
> would normally register an IRQ handler with the IRQ subsystem. However
> there is no reason the SoundWire in-band IRQs can not also be
> communicated as an actual IRQ to the driver.
> 
> Add support for SoundWire peripherals to register a normal IRQ
> handler to receive SoundWire in-band alerts, allowing code to be
> shared across control buses. Note that we allow users to use both the
> interrupt_callback and the IRQ handler, this is useful for devices
> which must clear additional chip specific SoundWire registers that are
> not a part of the normal IRQ flow, or the SoundWire specification.

..

> +#include <linux/irqdomain.h>

Added code doesn't use anythitg from above. 
It can be fulfilled with a forward declaration.

-- 
With Best Regards,
Andy Shevchenko