soc: apple: Add DockChannel driver

DockChannel is a simple FIFO interface used to communicate between SoC blocks. Add a driver that represents the shared interrupt controller for the DockChannel block, and then exposes probe and data transfer functions that child device drivers can use to instantiate individual FIFOs. Signed-off-by: Hector Martin <marcan@marcan.st>
AsahiLinux · Oct 17, 2022 · a0a2a03 · a0a2a03
1 parent 98e513e
commit a0a2a03
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diff --git a/drivers/soc/apple/Kconfig b/drivers/soc/apple/Kconfig
@@ -41,6 +41,16 @@ config APPLE_SART
 
 	  Say 'y' here if you have an Apple SoC.
 
+config APPLE_DOCKCHANNEL
+	tristate "Apple DockChannel FIFO"
+	depends on ARCH_APPLE || COMPILE_TEST
+	default ARCH_APPLE
+	help
+	  DockChannel is a simple FIFO used on Apple SoCs for debug and inter-processor
+	  communications.
+
+	  Say 'y' here if you have an Apple SoC.
+
 endmenu
 
 endif
diff --git a/drivers/soc/apple/Makefile b/drivers/soc/apple/Makefile
@@ -6,3 +6,6 @@ apple-rtkit-y = rtkit.o rtkit-crashlog.o
 
 obj-$(CONFIG_APPLE_SART) += apple-sart.o
 apple-sart-y = sart.o
+
+obj-$(CONFIG_APPLE_DOCKCHANNEL) += apple-dockchannel.o
+apple-dockchannel-y = dockchannel.o