Some chromebook EC provides a counter to get all vsync coming from the back camera. This series introduces a patch coming from chromebook kernel 4.4 designed as an IIO counter. As IIO counter will be deprecated in favor of counter, I rebase the original patch and support the new counter API. The serie need to be merged after https://lkml.org/lkml/2019/7/9/305 Changes since v1: - Drop code related to IIO_COUNT - Add external attribute to the counter driver - Add cros_ec_sensors_sync.c to MAINTAINERS file Gwendal Grignou (1): counter: cros_ec: Add synchronization sensor Documentation/driver-api/generic-counter.rst | 3 + MAINTAINERS | 7 + drivers/counter/Kconfig | 9 + drivers/counter/Makefile | 1 + drivers/counter/counter.c | 2 + drivers/counter/cros_ec_sensors_sync.c | 208 ++++++++++++++++++ .../cros_ec_sensors/cros_ec_sensors_core.c | 1 + drivers/mfd/cros_ec_dev.c | 3 + include/linux/counter.h | 1 + 9 files changed, 235 insertions(+) create mode 100644 drivers/counter/cros_ec_sensors_sync.c -- 2.20.1
