linux-kernel - [PATCH 0/6] usb: typec: and platform/chrome: Add PD revision numbers

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Message-Id: <20210129061406.2680146-1-bleung@chromium.org>
Date:   Thu, 28 Jan 2021 22:14:00 -0800
From:   Benson Leung <bleung@...omium.org>
To:     heikki.krogerus@...ux.intel.com, enric.balletbo@...labora.com,
        pmalani@...omium.org, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     groeck@...omium.org, bleung@...gle.com, bleung@...omium.org
Subject: [PATCH 0/6] usb: typec: and platform/chrome: Add PD revision numbers

USB Power Delivery has a 3 entity handshake (port, cable, partner), and as
of USB PD R3.0, each entity may independently support either Revision 2 or
Revision 3 signaling and protocol. In order for userspace and the kernel
to properly process the data objects received from a particular SOP*, we
must know to which revision of the spec each conforms.

This series adds individual version numbers for the partner and the cable,
and exposes them in the appropriate sysfs in /sys/class/typec.

I provide as a first implementation of this, platform/chrome's cros_ec_typec
driver, whose underlying status messages convey the SOP and SOP' revisions
already.

Thanks,
Benson

Benson Leung (6):
  usb: typec: Standardize PD Revision format with Type-C Revision
  usb: typec: Provide PD Specification Revision for cable and partner
  usb: typec: Add typec_partner_set_pd_revision
  platform/chrome: cros_ec_typec: Report SOP' PD revision from status
  platform/chrome: cros_ec_typec: Set Partner PD revision from status
  platform/chrome: cros_ec_typec: Set opmode to PD on SOP connected

 Documentation/ABI/testing/sysfs-class-typec | 20 ++++++-
 drivers/platform/chrome/cros_ec_typec.c     | 26 +++++++--
 drivers/usb/typec/class.c                   | 59 +++++++++++++++++++--
 include/linux/usb/typec.h                   | 11 ++++
 4 files changed, 108 insertions(+), 8 deletions(-)

-- 
2.30.0.365.g02bc693789-goog