Messages in this thread | | | From | Javier Martinez Canillas <> | Subject | [PATCH 0/3] mfd: cros_ec: Add user-space dev inferface support | Date | Mon, 17 Nov 2014 16:30:10 +0100 |
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Hello,
The mainline ChromeOS Embedded Controller (EC) driver is still missing some features that are present in the downstream ChromiumOS tree. These are:
- User-space device interface - Low Pin Count (LPC) interface - Access to vboot context stored on a block device - Access to vboot context stored on EC's nvram - Power Delivery Device - Support for multiple EC in a system
This series adds support for the first of these missing features: the cros ec dev driver that provides the interface used by user-space to access the EC. The support patches were taken from the downstream ChromiumOS 3.14 kernel tree with fixes and cleanups squashed to have a minimal patch-set.
The series is composed of the following patches:
Bill Richardson (3): mfd: cros_ec: Add Chrome OS EC userspace device interface mfd: cros_ec: Create sysfs attributes for the ChromeOS EC. mfd: cros_ec: Expose Chrome OS Lightbar to users
drivers/mfd/Kconfig | 12 ++ drivers/mfd/Makefile | 2 + drivers/mfd/cros_ec.c | 4 + drivers/mfd/cros_ec_dev.c | 363 ++++++++++++++++++++++++++++++++++++++++ drivers/mfd/cros_ec_dev.h | 29 ++++ drivers/mfd/cros_ec_lightbar.c | 347 ++++++++++++++++++++++++++++++++++++++ drivers/mfd/cros_ec_sysfs.c | 271 ++++++++++++++++++++++++++++++ include/linux/mfd/cros_ec.h | 12 +- include/linux/mfd/cros_ec_dev.h | 47 ++++++ 9 files changed, 1086 insertions(+), 1 deletion(-) create mode 100644 drivers/mfd/cros_ec_dev.c create mode 100644 drivers/mfd/cros_ec_dev.h create mode 100644 drivers/mfd/cros_ec_lightbar.c create mode 100644 drivers/mfd/cros_ec_sysfs.c create mode 100644 include/linux/mfd/cros_ec_dev.h
Patch #1 adds the cros_ec_dev driver that provides the dev interface to user-space. Patch #2 adds sysfs entries that can be used to get information and to control the EC and Patch #3 adds sysfs entries to control Chromebook Pixel's four-element LED lightbar.
The patches were tested on a Exynos5420 Peach Pit Chromebook by using the sysfs entries and the ectool.
Best regards, Javier
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