linux-kernel - Re: [PATCH] pinctrl: mcp23s08: Get rid of spurious level interrupts

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Message-ID: <CACRpkdYoDroEqwtH4GVa5VZ0WeBs85hY8ostM68gR06XzQ0Ctg@mail.gmail.com>
Date: Thu, 27 Feb 2025 21:29:22 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: Dmitry Mastykin <mastichi@...il.com>
Cc: Sebastian Reichel <sre@...nel.org>, 
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"e.shatokhin@...ro.com" <e.shatokhin@...ro.com>, 
	"arturas.moskvinas@...il.com" <arturas.moskvinas@...il.com>
Subject: Re: [PATCH] pinctrl: mcp23s08: Get rid of spurious level interrupts

On Mon, Feb 17, 2025 at 8:18 PM Dmitry Mastykin <mastichi@...il.com> wrote:

> Thank you, Linus. No, I have no users. It's only a prototype, using a
> touchscreen. I think it has to be redesigned using chipset interrupt
> controller's pin instead of the expander to speed-up, although I don't
> feel touch gets slower. I spoke about hypothetical users who may use
> the expander as an interrupt controller at rates comparable to
> mcp23s08_irq() execution time, and may get less interrupts per second.

Well I think the patch is completely reasonable so I'll just leave
it in for now. If it causes problems we can revert it.

Yours,
Linus Walleij