Messages in this thread | | | From | "Dustin L. Howett" <> | Subject | [PATCH v2 0/2] platform/chrome: add support for the Framework Laptop | Date | Wed, 26 Jan 2022 12:00:18 -0600 |
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This patch series adds support for the Framework Laptop to the cros_ec LPC driver.
The Framework Laptop is a non-Chromebook laptop that uses the ChromeOS Embedded Controller. Since the machine was designed to present a more normal device profile, it does not report all 512 I/O ports that are typically used by cros_ec_lpcs. Because of this, changes to the driver's port reservation scheme were required.
Since this EC driver probes the MEC range first, and uses only the MEC range if that probe succeeds[^1], we can get by without requesting the entire port range required by non-MEC embedded controllers until absolutely necessary.
[^1]: this includes "memory mapped" read - where the traditional LPC EC requires I/O ports 0x900-0x9FF, the MEC EC multiplexes reads/writes over the same eight ports, 0x800-0x807.
Changelog in v2: Cleaned up the commit subjects per request.
Dustin L. Howett (2): platform/chrome: cros_ec_lpcs: detect the Framework Laptop platform/chrome: cros_ec_lpcs: reserve the MEC LPC I/O ports first
drivers/platform/chrome/cros_ec_lpc.c | 47 ++++++++++----- include/linux/platform_data/cros_ec_commands.h | 4 + 2 files changed, 38 insertions(+), 13 deletions(-)
-- 2.34.1
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