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amba_pl011: Add cts-event-workaround DT property
commit 8541a70fd40ad2612f1a5471206726dea4e8b8c1 from https://github.com/raspberrypi/linux.git rpi-6.6.y The BCM2835 PL011 implementation seems to have a bug that can lead to a transmission lockup if CTS changes frequently. A workaround was added to the driver with a vendor-specific flag to enable it, but this flag is currently not set for ARM implementations. Add a "cts-event-workaround" property to Pi DTBs and use the presence of that property to force the flag to be enabled in the driver. See: raspberrypi/linux#1280 Signed-off-by: Phil Elwell <phil@raspberrypi.org> Signed-off-by: Rajeshkumar Ramasamy <rajeshkumar.ramasamy@windriver.com>
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