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2020-07-20counter: Add microchip TCB capture counterKamel Bouhara1-0/+397
This drivers allows to use the capture mode of the Timer Counter Block hardware block available in Microchip SoCs through the counter subsystem. Two functions of the counter are supported for the moment: period capture and quadrature decoder. The latter is only supported by the SAMA5 series of SoCs. For the period capture mode a basic setup has been chosen that will reset the counter each time the period is actually reached. Of course the device offers much more possibilities. For quadrature mode, both channel 0 and 1 must be configured even if we only capture the position (no revolution/rotation). Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>