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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
