linux-kernel - Re: [PATCH v5 2/2] drivers: hwmon: sophgo: Add SG2042 external hardware monitor support

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Message-ID: <df0f11cb-3b44-4869-bfd6-6e5d01e6debd@roeck-us.net>
Date: Fri, 21 Jun 2024 08:19:10 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Inochi Amaoto <inochiama@...look.com>
Cc: Jean Delvare <jdelvare@...e.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, linux-hwmon@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v5 2/2] drivers: hwmon: sophgo: Add SG2042 external
 hardware monitor support

On Sun, May 05, 2024 at 09:18:53AM +0800, Inochi Amaoto wrote:
> SG2042 use an external MCU to provide basic hardware information
> and thermal sensors.
> 
> Add driver support for the onboard MCU of SG2042.
> 
> Signed-off-by: Inochi Amaoto <inochiama@...look.com>
> ---
>  drivers/hwmon/Kconfig            |  11 +
>  drivers/hwmon/Makefile           |   1 +
>  drivers/hwmon/sg2042-hwmon-mcu.c | 531 +++++++++++++++++++++++++++++++

Documentation missing.

> +config SENSORS_SG2042_HWMON_MCU

"SENSORS" and "HWMON" is redundant. Yes, I know, others do it
as well, but that doesn't make it less redundant.

> +static DEVICE_ATTR_RO(board_type);
> +static DEVICE_ATTR_RO(firmware_version);
> +static DEVICE_ATTR_RO(pcb_version);
> +static DEVICE_ATTR_RO(reset_count);
> +static DEVICE_ATTR_RO(uptime);
> +static DEVICE_ATTR_RO(reset_reason);
> +static DEVICE_ATTR_RO(mcu_type);
> +static DEVICE_ATTR_RW(critical_action);

None of the above are hardware monitoring attributes. They are not
acceptable as sysfs attributes. Some of them might be acceptable
as debugfs attributes.

> +static DEVICE_ATTR_RW(repower_temp);
> +

For this one, I don't know what it is. If it is a temperature
limit, it should be implemented as one (for example as _emergency
limit).

Guenter