Commit f5a5e833 authored by Hector Martin's avatar Hector Martin Committed by Arnd Bergmann
Browse files

soc: apple: rtkit: Add apple_rtkit_poll 



This allows a client to receive messages in atomic context, by polling.

Signed-off-by: default avatarHector Martin <marcan@marcan.st>
Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: default avatarSven Peter <sven@svenpeter.dev>
Reviewed-by: default avatarEric Curtin <ecurtin@redhat.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 387969b7

drivers/soc/apple/rtkit.c

+6 −0
Original line number Diff line number Diff line
@@ -660,6 +660,12 @@ int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message, 
}

EXPORT_SYMBOL_GPL(apple_rtkit_send_message_wait);



int apple_rtkit_poll(struct apple_rtkit *rtk)

{

	return mbox_client_peek_data(rtk->mbox_chan);

}

EXPORT_SYMBOL_GPL(apple_rtkit_poll);



int apple_rtkit_start_ep(struct apple_rtkit *rtk, u8 endpoint)

{

	u64 msg;

include/linux/soc/apple/rtkit.h

+12 −0
Original line number Diff line number Diff line
@@ -152,4 +152,16 @@ int apple_rtkit_send_message(struct apple_rtkit *rtk, u8 ep, u64 message, 
int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message,

				  unsigned long timeout, bool atomic);



/*

 * Process incoming messages in atomic context.

 * This only guarantees that messages arrive as far as the recv_message_early

 * callback; drivers expecting to handle incoming messages synchronously

 * by calling this function must do it that way.

 * Will return 1 if some data was processed, 0 if none was, or a

 * negative error code on failure.

 *

 * @rtk:            RTKit reference

 */

int apple_rtkit_poll(struct apple_rtkit *rtk);



#endif /* _LINUX_APPLE_RTKIT_H_ */