From: Simon Glass sjg@chromium.org Date: Fri, 21 Jan 2022 18:40:14 -0700
Hi Mark,
On Fri, 14 Jan 2022 at 04:05, Mark Kettenis kettenis@openbsd.org wrote:
Most Apple IOPs run a firmware that is based on what Apple calls RTKit. RTKit implements a common mailbox protocol. This code provides an implementation of the AP side of this protocol, providing a function to initialize RTKit-based firmwares as well as a function to do a clean shutdown of this firmware.
Signed-off-by: Mark Kettenis kettenis@openbsd.org
arch/arm/include/asm/arch-apple/rtkit.h | 11 ++ arch/arm/mach-apple/Makefile | 1 + arch/arm/mach-apple/rtkit.c | 231 ++++++++++++++++++++++++ 3 files changed, 243 insertions(+) create mode 100644 arch/arm/include/asm/arch-apple/rtkit.h create mode 100644 arch/arm/mach-apple/rtkit.c
This should be a driver.
This isn't a driver but just a bit of helper code that implements the RTKit protocol. It will be used by the Apple NVMe driver and a future SMC driver. The same approach is being taken in Linux. Since it is intended to be shared, I didn't put it in the NVMe driver itself.