linux-kernel - Re: [PATCH v7] iio: adc: pac1921: Add ACPI support to Microchip pac1921

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Message-ID: <ZyaB9G1baF10FzZD@surfacebook.localdomain>
Date: Sat, 2 Nov 2024 21:48:04 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: victor.duicu@...rochip.com
Cc: matteomartelli3@...il.com, jic23@...nel.org, lars@...afoo.de,
	marius.cristea@...rochip.com, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7] iio: adc: pac1921: Add ACPI support to Microchip
 pac1921

Thu, Oct 31, 2024 at 08:52:05AM +0200, victor.duicu@...rochip.com kirjoitti:
> From: Victor Duicu <victor.duicu@...rochip.com>
> 
> This patch implements ACPI support to Microchip pac1921.
> The driver can read shunt resistor value and label from ACPI table.

This ID might be okay, but can we please have:
1) the list of the models (or a model) of the device on the market that has this;
2) ACPI DSDT excerpt of the respective Device object?

(I mean a laptop, tablet, phone or other device that has this sensor described
in the ACPI)

...

> +/*
> + * documentation related to the ACPI device definition

Documentation

> + * https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ApplicationNotes/ApplicationNotes/PAC193X-Integration-Notes-for-Microsoft-Windows-10-and-Windows-11-Driver-Support-DS00002534.pdf
> + */

...

> +	if (ACPI_HANDLE(dev))

Hmm... Want this be really needed? You can try to call DSM. and if it fails try
DT (or actually other way around as we usually do).

> +		ret = pac1921_match_acpi_device(indio_dev);
> +	else
> +		ret = pac1921_parse_of_fw(indio_dev);

...

> +static const struct acpi_device_id pac1921_acpi_match[] = {
> +	{ "MCHP1921" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(acpi, pac1921_acpi_match);

Missing blank line here.

...

>  	.driver	 = {
>  		.name = "pac1921",
>  		.pm = pm_sleep_ptr(&pac1921_pm_ops),
>  		.of_match_table = pac1921_of_match,
> +		.acpi_match_table = pac1921_acpi_match


Missing trailing comma here.

>  	},

-- 
With Best Regards,
Andy Shevchenko