linux-kernel - [PATCH v2 0/2] platform/chrome: cros_ec

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Message-Id: <20221122220538.2991775-1-pmalani@chromium.org>
Date:   Tue, 22 Nov 2022 22:05:35 +0000
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        chrome-platform@...ts.linux.dev
Cc:     Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <groeck@...omium.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: [PATCH v2 0/2] platform/chrome: cros_ec_typec: Link PD object to partner

This is a short series to link a registered USB PD object to its associated
partner device. This is helpful for userspace services (the ChromeOS Type-C
daemon, for example), to identify which Type-C peripheral a PD object belongs to,
when a uevent for the PD object arrives.

The first patch adds a wrapper to the Type-C class code to register a PD object
with a Type-C partner as its parent. The second patch uses that wrapper to
register the Type-C partner USB PD object in the port driver code.

There was an earlier patch[1] to solve this issue, but it's been jettisoned (on advice from
GregKH) in favor of the current approach.

[1] https://lore.kernel.org/linux-usb/Y3vNZEuNI3CWzZ0L@chromium.org/T/#m7521020f64d878313d7dd79903ec0e9421aa8737

Series submission suggestions (if the approach is OK):
- Patch 1 goes throug the USB tree and Patch 2 goes in the next release cycle
  through the chrome-platform tree.
- Patch 1 and 2 both go through the USB tree.

v1: https://lore.kernel.org/linux-usb/20221121201337.2772216-1-pmalani@chromium.org/

Changes since v1:
- Drop Patch 1 from v1, and instead introduce a new Patch 1 which uses the wrapper
  function suggested by Heikki Krogerus.
- Update Patch 2 to use the new wrapper.

Prashant Malani (2):
  usb: typec: Add partner PD object wrapper
  platform/chrome: cros_ec_typec: Set parent of partner PD object

 drivers/platform/chrome/cros_ec_typec.c |  2 +-
 drivers/usb/typec/class.c               | 19 +++++++++++++++++++
 include/linux/usb/typec.h               |  4 ++++
 3 files changed, 24 insertions(+), 1 deletion(-)

-- 
2.38.1.584.g0f3c55d4c2-goog