arm: apple: rtkit: Add a generic RTKit helper driver
This driver handles the MTP ASC coprocessor, which does not need any
special handling on the RTKit side and communicates out-of-band.
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
diff --git a/arch/arm/include/asm/arch-apple/rtkit.h b/arch/arm/include/asm/arch-apple/rtkit.h
index b795215..1b6c6cc 100644
--- a/arch/arm/include/asm/arch-apple/rtkit.h
+++ b/arch/arm/include/asm/arch-apple/rtkit.h
@@ -29,3 +29,5 @@
int apple_rtkit_set_ap_power(struct apple_rtkit *rtk, int pwrstate);
int apple_rtkit_poll(struct apple_rtkit *rtk, ulong timeout);
int apple_rtkit_shutdown(struct apple_rtkit *rtk, int pwrstate);
+
+int apple_rtkit_helper_poll(struct udevice *dev, ulong timeout);