linux-kernel - [PATCH v2 0/6] platform/x86: ayaneo-ec: Add Ayaneo Embedded Controller platform driver

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Message-ID: <20251015084414.1391595-1-lkml@antheas.dev>
Date: Wed, 15 Oct 2025 10:44:08 +0200
From: Antheas Kapenekakis <lkml@...heas.dev>
To: platform-driver-x86@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	linux-hwmon@...r.kernel.org,
	Hans de Goede <hansg@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Derek John Clark <derekjohn.clark@...il.com>,
	Joaquín Ignacio Aramendía <samsagax@...il.com>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Antheas Kapenekakis <lkml@...heas.dev>
Subject: [PATCH v2 0/6] platform/x86: ayaneo-ec: Add Ayaneo Embedded
 Controller platform driver

This series introduces a platform driver for Ayaneo devices, ayaneo-ec.
This driver provides hwmon support, power management, and module management
(for the new Ayaneo 3 device). Module management is done through the new
firmware attributes sysfs interface.

Luckily, all Ayaneo devices with an ACPI mapped EC use the same registers.
Older devices also use a memory mapped region for RGB[1], but that is
replaced by HID in the new Ayaneo 3. Therefore, this allows for a simple
driver design that provides robust future support. The memory mapped region
can be upstreamed as a different RGB driver in the future or remain
out-of-tree[1].

This change also allows cleaning up the oxpec driver, by removing Ayaneo
devices from it. In parallel, charge limiting is added for these devices.

[1] https://github.com/ShadowBlip/ayaneo-platform

---

V1: https://lore.kernel.org/all/20250820160628.99678-1-lkml@antheas.dev/

Changes since V1:
  - Use plain sysfs attrs for magic module attributes
  - Combine quirk for power and modules, so attribute tree is simpler
  - Use switch statement in hwmon
  - Add hibernation hook for charge bypass in last patch
    - Restoring fan speed is a liability so it is omitted, see patch notes
      Note that for EC managed fan curves, it would be acceptable
    - Regmap comment: Using regmap is unprecedented for ACPI mapped ECs
      and overkill for one value (> 100 LOC)
  - fixp_linear_interpolate() comment: it requires importing an extra header,
    is not used for static parameters in other modules, and expands to the
    same equation for parameters used, so it is omitted

Antheas Kapenekakis (6):
  platform/x86: ayaneo-ec: Add Ayaneo Embedded Controller platform
    driver
  platform/x86: ayaneo-ec: Add hwmon support
  platform/x86: ayaneo-ec: Add charge control support
  platform/x86: ayaneo-ec: Add controller power and modules attributes
  platform/x86: ayaneo-ec: Move Ayaneo devices from oxpec to ayaneo-ec
  platform/x86: ayaneo-ec: Add suspend hook

 .../ABI/testing/sysfs-platform-ayaneo         |  19 +
 MAINTAINERS                                   |   7 +
 drivers/platform/x86/Kconfig                  |  17 +-
 drivers/platform/x86/Makefile                 |   3 +
 drivers/platform/x86/ayaneo-ec.c              | 541 ++++++++++++++++++
 drivers/platform/x86/oxpec.c                  | 115 +---
 6 files changed, 585 insertions(+), 117 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-platform-ayaneo
 create mode 100644 drivers/platform/x86/ayaneo-ec.c


base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
-- 
2.51.0