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Axel Haslam a8bc00fb88 greybus: uart: Add credits based tracking for transmit path ... To avoid polling the firmware for space, a credit based system is implemented. The host will keep track of how many credits (bytes) it has sent to the firmware, and stop sending data when the quota is filled. The host will be informed that the firmware has more room for data when it handles the receive_credits request message from the firmware, and will continue to write data as credits become available. The firmware and the host may implement an algorithm to aggregate credits, and avoid extra greybus traffic. Suggested-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Axel Haslam <ahaslam@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>		2016-05-31 17:18:18 -07:00
drivers/staging/greybus	greybus: uart: Add credits based tracking for transmit path	2016-05-31 17:18:18 -07:00