mailbox: add Tegra186 HSP driver
Tegra186's HSP module implements doorbells, mailboxes, semaphores, and shared interrupts. This patch provides a driver for HSP, and hooks it into the mailbox API. Currently, only doorbells are supported. Signed-off-by: NStephen Warren <swarren@nvidia.com> Reviewed-by: NSimon Glass <sjg@chromium.org> Acked-by: NSimon Glass <sjg@chromium.org>
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drivers/mailbox/tegra-hsp.c
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