linux-kernel - [PATCH v4 0/9] Type-C switch driver and Type-C framework updates

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Message-Id: <20220711072333.2064341-1-pmalani@chromium.org>
Date:   Mon, 11 Jul 2022 07:22:54 +0000
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        chrome-platform@...ts.linux.dev
Cc:     bleung@...omium.org, heikki.krogerus@...ux.intel.com,
        Prashant Malani <pmalani@...omium.org>,
        Daisuke Nojiri <dnojiri@...omium.org>,
        "Dustin L. Howett" <dustin@...ett.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <groeck@...omium.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCH v4 0/9] Type-C switch driver and Type-C framework updates

This series introduces a retimer class to the USB Type-C framework,
It also introduces a Chrome EC (Embedded Controller) switch driver which
registers the aforementioned retimer switches as well as mode-switches.

Patch 1 and 2 introduce the retimer class and associated functions to
the Type-C common code.

Patches 3-7 add the cros-typec-switch driver.

Patches 8-9 update cros-ec-typec to get and use retimer switch handles.

Submission suggestion (as always, open to better suggestions):
- Patch 1 and 2 can go through the USB repo.
- Patch 3-9 can go through the chrome-platform repo. Since they depend
  on patches 1 and 2, we can create an "topic branch" off of usb-next
  once Patch 1 and 2 are submitted, and then apply Patches 3-9 on top
  of that "topic branch" before merging it back into chrome-platform's
  for-next branch

v3: https://lore.kernel.org/linux-usb/20220707222045.1415417-1-pmalani@chromium.org/

Changes since v3:
- Updated Commit message of Patch 1 to mention that no new
  class-specific sysfs files are being created.

Changes since v2:
- Fixed missing "static" declarations, and removed newlines from
  function signatures.

Changes since v1:
- Changed class name and retimer device type name, and fixed
  retimer reference release issue.

Prashant Malani (9):
  usb: typec: Add support for retimers
  usb: typec: Add retimer handle to port
  platform/chrome: Add Type-C mux set command definitions
  platform/chrome: cros_typec_switch: Add switch driver
  platform/chrome: cros_typec_switch: Set EC retimer
  platform/chrome: cros_typec_switch: Add event check
  platform/chrome: cros_typec_switch: Register mode switches
  platform/chrome: cros_ec_typec: Cleanup switch handle return paths
  platform/chrome: cros_ec_typec: Get retimer handle

 MAINTAINERS                                   |   1 +
 drivers/platform/chrome/Kconfig               |  11 +
 drivers/platform/chrome/Makefile              |   1 +
 drivers/platform/chrome/cros_ec_typec.c       |  50 ++-
 drivers/platform/chrome/cros_typec_switch.c   | 332 ++++++++++++++++++
 drivers/usb/typec/Makefile                    |   2 +-
 drivers/usb/typec/class.c                     |  18 +-
 drivers/usb/typec/class.h                     |   2 +
 drivers/usb/typec/retimer.c                   | 168 +++++++++
 drivers/usb/typec/retimer.h                   |  15 +
 .../linux/platform_data/cros_ec_commands.h    |  18 +
 include/linux/usb/typec_retimer.h             |  45 +++
 12 files changed, 654 insertions(+), 9 deletions(-)
 create mode 100644 drivers/platform/chrome/cros_typec_switch.c
 create mode 100644 drivers/usb/typec/retimer.c
 create mode 100644 drivers/usb/typec/retimer.h
 create mode 100644 include/linux/usb/typec_retimer.h

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2.37.0.144.g8ac04bfd2-goog