linux-kernel - Re: [PATCH v3 2/6] platform: arm64: add Huawei Matebook E Go EC driver

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Message-ID: <dae486c3-8c3d-4b56-8022-4620fa638f82@roeck-us.net>
Date: Mon, 13 Jan 2025 10:34:17 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Pengyu Luo <mitltlatltl@...il.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Hans de Goede <hdegoede@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Sebastian Reichel <sre@...nel.org>,
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jean Delvare <jdelvare@...e.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, platform-driver-x86@...r.kernel.org,
 linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
 linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v3 2/6] platform: arm64: add Huawei Matebook E Go EC
 driver

On 1/13/25 09:50, Pengyu Luo wrote:
> There are three variants of which Huawei released the first two
> simultaneously.
> 
> Huawei Matebook E Go LTE(sc8180x), codename seems to be gaokun2.
> Huawei Matebook E Go(sc8280xp@...GHz), codename must be gaokun3. (see [1])
> Huawei Matebook E Go 2023(sc8280xp@...9GHz), codename should be also gaokun3.
> 
> Adding support for the latter two variants for now, this driver should
> also work for the sc8180x variant according to acpi table files, but I
> don't have the device to test yet.
> 
> Different from other Qualcomm Snapdragon sc8280xp based machines, the
> Huawei Matebook E Go uses an embedded controller while others use
> a system called PMIC GLink. This embedded controller can be used to
> perform a set of various functions, including, but not limited to:
> 
> - Battery and charger monitoring;
> - Charge control and smart charge;
> - Fn_lock settings;
> - Tablet lid status;
> - Temperature sensors;
> - USB Type-C notifications (ports orientation,  DP alt mode HPD);
> - USB Type-C PD (according to observation, up to 48w).
> 
> Add a driver for the EC which creates devices for UCSI and power supply
> devices.
> 
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=219645
> 
> Signed-off-by: Pengyu Luo <mitltlatltl@...il.com>
> ---
...
> +	ec->hwmon_dev = hwmon_device_register_with_groups(dev, "gaokun_ec_hwmon",
> +							  ec, gaokun_ec_hwmon_groups);

This API function is deprecated.

Guenter