linux-kernel - Re: [PATCH] pinctrl: mcp23s08: Check only GPIOs which have interrupts enabled

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Message-ID: <ZbuCP4rN_DEsH-Un@smile.fi.intel.com>
Date: Thu, 1 Feb 2024 13:36:31 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Arturas Moskvinas <arturas.moskvinas@...il.com>
Cc: linus.walleij@...aro.org, u.kleine-koenig@...gutronix.de,
	radim.pavlik@...-biometrics.com, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: mcp23s08: Check only GPIOs which have
 interrupts enabled

On Tue, Jan 30, 2024 at 09:37:10AM +0200, Arturas Moskvinas wrote:
> GPINTEN register contains information about GPIOs with enabled
> interrupts no need to check other GPIOs for changes.

..

> +	if (mcp_read(mcp, MCP_GPINTEN, &gpinten))
> +		goto unlock;

> +	enabled_interrupts = gpinten;

Move this line to be...

..

> -	for (i = 0; i < mcp->chip.ngpio; i++) {
> -		/* We must check all of the inputs on the chip,
> -		 * otherwise we may not notice a change on >=2 pins.

..just here (w/o any blank line in between).

> +	for_each_set_bit(i, &enabled_interrupts, mcp->chip.ngpio) {

..

> +		/* We must check all of the inputs with enabled interrupts
> +		 * on the chip, otherwise we may not notice a change
> +		 * on >=2 pins.

Missing space after =. But better to spell in proper English, i.e.
"...great than or equal to 2 pins."

>  		 *
>  		 * On at least the mcp23s17, INTCAP is only updated

/*
 * Use proper multi-line
 * comment style as depicted
 * in this example.
 */

-- 
With Best Regards,
Andy Shevchenko