This series implements a UCSI ChromeOS EC transport driver. The ChromeOS EC is expected to implement UCSI Platform Policy Manager (PPM). --- Changes in v11: - Updated cancel_delayed_work() to cancel_delayed_work_sync() in both cros_ucsi_suspend() and cros_ucsi_destroy() in order to wait for delayed work to finish if it is running. - Link to v10: https://lore.kernel.org/linux-usb/20241204194900.371696-1-ukaszb@xxxxxxxxxxxx/ Changes in v10: - Added cancel_delayed_work() in the cros_ucsi_suspend() in order to prevent premature wake up during suspend. - Added cancel_delayed_work() in the cros_ucsi_destroy() as well. - Link to v9: https://lore.kernel.org/linux-usb/20241203142314.3892422-1-ukaszb@xxxxxxxxxxxx/ Changes in v9: - Squash "usb: typec: cros_ec_ucsi: Recover from write timeouts" commit into "usb: typec: ucsi: Implement ChromeOS UCSI driver". - Replaced out label in cros_ucsi_sync_control() with switch statement. - Link to v8: https://lore.kernel.org/linux-usb/20241128232035.1525978-1-ukaszb@xxxxxxxxxxxx/ Changes in v8: - Set .sync_control in cros_ucsi_ops struct to point to ucsi_sync_control_common(). - Added explanation why complete() is used instead of resume() in cros_ucsi_pm_ops struct. - Updated s/miliseconds/milliseconds/. - Link to v7: https://lore.kernel.org/linux-usb/20241115155234.1587589-1-ukaszb@xxxxxxxxxxxx/ Changes in v7: - Dropped the following commits for now as I want to focus on upstreaming cros_ec_ucsi driver first. Then I will get back to the topic of trace events and netlink: "usb: typec: cros_ec_ucsi: Add trace events" "usb: typec: cros_ec_ucsi: Add netlink" - Squashed "usb: typec: cros_ec_ucsi: Use complete instead of resume" into "usb: typec: ucsi: Implement ChromeOS UCSI driver". - Added "usb: typec: cros_ec_ucsi: Recover from write timeouts" commmit. - Added usage of common functins ucsi_sync_control_common() and ucsi_notify_common(). - Commits: "platform/chrome: Update EC feature flags" "mfd: cros_ec: Load cros_ec_ucsi on supported ECs" "mfd: cros_ec: Don't load charger with UCSI" landed in the tree https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git/log/?h=for-mfd-next - Link to v6: https://lore.kernel.org/linux-usb/20240910101527.603452-1-ukaszb@xxxxxxxxxxxx Changes in v6: - Reverted to type names uint*_t in cros_ec_commands.h in order to be consistent with type names used in other parts of the file. - Updated comments in cros_ec_commands.h related to UCSI. - Added missing sign-offs. - Fixed memory leak in cros_ucsi_async_control() by moving ec_params_ucsi_ppm_set request buffer to stack. - Replaced cros_ucsi_read with cros_ucsi_read_cci in cros_ucsi_work(). - Updated changes in v5, it was missing information related to commits addition: platform/chrome: Update EC feature flags usb: typec: cros_ec_ucsi: Use complete instead of resume mfd: cros_ec: Load cros_ec_ucsi on supported ECs mfd: cros_ec: Don't load charger with UCSI - Link to v5: https://lore.kernel.org/r/all/20240903163033.3170815-1-ukaszb@xxxxxxxxxxxx/ Changes in v5: - Increased WRITE_TMO_MS to 5000. - Replaced DRV_NAME with KBUILD_MODNAME. - Added comments for WRITE_TMO_MS and MAX_EC_DATA_SIZE defines. - Refactored cros_ucsi_async_control() to dynamically allocate memory for a message to EC instead of allocating the message on stack. - Replaced type names uint*_t with u*. - Removed ret variable in cros_ucsi_work(). - Updated ucsi_operations interface to align with changes introduced in v6.11. - Replaced test_bit() with test_and_clear_bit() in cros_ucsi_work(). - Updated EC feature flags in commit "platform/chrome: Update EC feature flags". - Added new commit "usb: typec: cros_ec_ucsi: Use complete instead of resume". - Added trace events in commit "usb: typec: cros_ec_ucsi: Add trace events". - Added netlink in commit "usb: typec: cros_ec_ucsi: Add netlink" for debugging and testing puropses. - Added new commit "mfd: cros_ec: Load cros_ec_ucsi on supported ECs". - Added new commit "mfd: cros_ec: Don't load charger with UCSI". - Link to v4: https://lore.kernel.org/all/CAB2FV=6We88NrvN8NZYt8NkMFH9N_ZBGyUWVUpGwPdja2X_+NA@xxxxxxxxxxxxxx/T/ Changes in v4: - Setup notifications before calling ucsi_register. - Cancel work before destroying driver data. - Link to v3: https://lore.kernel.org/r/20240403-public-ucsi-h-v3-0-f848e18c8ed2@xxxxxxxxxxxx Changes in v3: - Moved driver from platform/chrome to usb/typec/ucsi. - Used id_table instead of MODULE_ALIAS. - Split EC header changes into seperate commit. - Fixes from additional internal reviews and kernel bot warnings. - Link to v2: https://lore.kernel.org/r/20240325-public-ucsi-h-v2-0-a6d716968bb1@xxxxxxxxxxxx Changes in v2: - No code or commit message changes. - Added drivers/platform/chrome maintainers for review. Pavan Holla (2): platform/chrome: Update ChromeOS EC header for UCSI usb: typec: ucsi: Implement ChromeOS UCSI driver MAINTAINERS | 7 + drivers/usb/typec/ucsi/Kconfig | 13 + drivers/usb/typec/ucsi/Makefile | 1 + drivers/usb/typec/ucsi/cros_ec_ucsi.c | 337 ++++++++++++++++++ .../linux/platform_data/cros_ec_commands.h | 28 +- 5 files changed, 385 insertions(+), 1 deletion(-) create mode 100644 drivers/usb/typec/ucsi/cros_ec_ucsi.c -- 2.47.0.338.g60cca15819-goog
