GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-20 21:51:05 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

platform: chrome: Add cros-usbpd-notify driver

Browse source 
ChromiumOS uses ACPI device with HID "GOOG0003" for power delivery
related events. The existing cros-usbpd-charger driver relies on these
events without ever actually receiving them on ACPI platforms. This is
because in the ChromeOS kernel trees, the GOOG0003 device is owned by an
ACPI driver that offers firmware updates to USB-C chargers.

Introduce a new platform driver under cros-ec, the ChromeOS embedded
controller, that handles these PD events and dispatches them
appropriately over a notifier chain to all drivers that use them.

On platforms that don't have the ACPI device defined, the driver gets
instantiated for ECs which support the EC_FEATURE_USB_PD feature bit,
and the notification events will get delivered using the MKBP event
handling mechanism.

Co-Developed-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Jon Flatley <jflat@chromium.org>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Acked-By: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
This commit is contained in:
Jon Flatley 2020-01-24 15:18:32 -08:00 • committed by Benson Leung
parent bb6d3fb354
commit ec2daf6e33
No known key found for this signature in database
GPG key ID: 736DAA268733B0C2
4 changed files with 201 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

17
include/linux/platform_data/cros_usbpd_notify.h Normal file
View file

@ -0,0 +1,17 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* ChromeOS EC Power Delivery Notifier Driver
*
* Copyright 2020 Google LLC
*/
#ifndef __LINUX_PLATFORM_DATA_CROS_USBPD_NOTIFY_H
#define __LINUX_PLATFORM_DATA_CROS_USBPD_NOTIFY_H
#include <linux/notifier.h>
int cros_usbpd_register_notify(struct notifier_block *nb);
void cros_usbpd_unregister_notify(struct notifier_block *nb);
#endif /* __LINUX_PLATFORM_DATA_CROS_USBPD_NOTIFY_H */