linux-kernel - Re: [PATCH v2 2/4] hwmon: (cros_ec) Add support for fan target speed

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Message-ID: <aXCXipHCdryd64Le@google.com>
Date: Wed, 21 Jan 2026 09:08:26 +0000
From: Tzung-Bi Shih <tzungbi@...nel.org>
To: Thomas Weißschuh <linux@...ssschuh.net>
Cc: Benson Leung <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org>,
	Thomas Weißschuh <thomas@...ssschuh.net>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jonathan Corbet <corbet@....net>, Dustin Howett <dustin@...ett.net>,
	Mario Limonciello <mario.limonciello@....com>,
	Stephen Horvath <s.horvath@...look.com.au>,
	chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org,
	linux-hwmon@...r.kernel.org, Sung-Chi Li <lschyi@...omium.org>,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH v2 2/4] hwmon: (cros_ec) Add support for fan target speed

On Sun, Jan 18, 2026 at 10:45:56AM +0100, Thomas Weißschuh wrote:
> @@ -259,8 +278,13 @@ static umode_t cros_ec_hwmon_is_visible(const void *data, enum hwmon_sensor_type
>  					u32 attr, int channel)
>  {
>  	const struct cros_ec_hwmon_priv *priv = data;
> +	u16 speed;
>  
>  	if (type == hwmon_fan) {
> +		if (attr == hwmon_fan_target &&
> +		    cros_ec_hwmon_read_fan_target(priv->cros_ec, &speed) == -EOPNOTSUPP)

[v2 4/4] patch uses is_cros_ec_cmd_available() for the purpose.  Can't it
also use here?