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由 Stephen Warren 提交于
The call op requests that the callee pass a message to the underlying HW or device, wait for a response, and then pass back the response error code and message to the callee. It is useful for drivers that represent some kind of messaging or IPC channel to a remote device. Signed-off-by: NStephen Warren <swarren@nvidia.com> Acked-by: NSimon Glass <sjg@chromium.org>
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