bcm27xx/bcm2712: add missing RP1 kmods

Add a package to supply the following modules needed by the RP1 I/O
controller: rp1, rp1-mailbox, rp1-pio, and pwm-pio-rp1.

Note - rp1-adc is currently a built-in.

Build system: x86/64
Build-tested: bcm2712/RPi5B
Run-tested: bcm2712/RPi5B

Signed-off-by: John Audia <therealgraysky@proton.me>

target/linux/bcm27xx/image/Makefile

@@ -201,7 +201,8 @@ define Device/rpi-5
 	cypress-firmware-43455-sdio \
 	brcmfmac-nvram-43455-sdio \
 	kmod-brcmfmac wpad-basic-mbedtls \
-	kmod-hwmon-pwmfan kmod-thermal
+	kmod-hwmon-pwmfan kmod-thermal \
+	kmod-rp1-firmware kmod-rp1-pio kmod-rp1-mailbox
   IMAGE/sysupgrade.img.gz := boot-common | sdcard-img | gzip | append-metadata
   IMAGE/factory.img.gz := boot-common | sdcard-img | gzip
 endef

target/linux/bcm27xx/modules/other.mk

@@ -53,3 +53,84 @@ define KernelPackage/smi-bcm2835-dev/description
 endef
 
 $(eval $(call KernelPackage,smi-bcm2835-dev))
+
+
+define KernelPackage/rp1-firmware
+  TITLE:=RP1 Firmware Driver
+  KCONFIG:= \
+           CONFIG_FIRMWARE_RP1 \
+           CONFIG_MBOX_RP1
+  FILES:=$(LINUX_DIR)/drivers/firmware/rp1.ko
+  DEPENDS:=\
+   @!TARGET_bcm27xx_bcm2708 @!TARGET_bcm27xx_bcm2709 \
+   @!TARGET_bcm27xx_bcm2710 @!TARGET_bcm27xx_bcm2711 \
+   @TARGET_bcm27xx +kmod-rp1-firmware
+endef
+
+define KernelPackage/rp1-firmware/description
+  Enables the RP1 chip to function correctly as a co-processor
+  handling GPIOs, SPI, I2C, and other low-level peripherals.
+endef
+
+$(eval $(call KernelPackage,rp1-firmware))
+
+
+define KernelPackage/rp1-pio
+  TITLE:=RP1 PIO driver
+  KCONFIG:=CONFIG_RP1_PIO
+  FILES:=$(LINUX_DIR)/drivers/misc/rp1-pio.ko
+  AUTOLOAD:=$(call AutoLoad,10,rp1-pio)
+  DEPENDS:=\
+   @!TARGET_bcm27xx_bcm2708 @!TARGET_bcm27xx_bcm2709 \
+   @!TARGET_bcm27xx_bcm2710 @!TARGET_bcm27xx_bcm2711 \
+   @TARGET_bcm27xx +kmod-rp1-firmware
+endef
+
+define KernelPackage/rp1-pio/description
+  Allows for custom hardware-accelerated I/O protocols to be
+  implemented.  Ideal for tasks requiring precise timing,
+  such as generating specific waveforms or handling non-
+  standard communication protocols.
+endef
+
+$(eval $(call KernelPackage,rp1-pio))
+
+
+define KernelPackage/rp1-mailbox
+  TITLE:=RP1 mailbox support
+  FILES:=$(LINUX_DIR)/drivers/mailbox/rp1-mailbox.ko
+  AUTOLOAD:=$(call AutoLoad,10,rp1-mailbox)
+  DEPENDS:=\
+   @!TARGET_bcm27xx_bcm2708 @!TARGET_bcm27xx_bcm2709 \
+   @!TARGET_bcm27xx_bcm2710 @!TARGET_bcm27xx_bcm2711 \
+   @TARGET_bcm27xx +kmod-rp1-firmware
+endef
+
+define KernelPackage/rp1-mailbox/description
+  Handles command and control messages exchanged between the
+  CPU and RP1, enabling efficient coordination for I/O operations,
+  status monitoring, and peripheral configuration.
+endef
+
+$(eval $(call KernelPackage,rp1-mailbox))
+
+
+define KernelPackage/pwm-pio-rp1
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=RP1 PWM support
+  KCONFIG:=CONFIG_PWM_PIO_RP1
+  FILES:=$(LINUX_DIR)/drivers/pwm/pwm-pio-rp1.ko
+  DEPENDS:=\
+   @!TARGET_bcm27xx_bcm2708 @!TARGET_bcm27xx_bcm2709 \
+   @!TARGET_bcm27xx_bcm2710 @!TARGET_bcm27xx_bcm2711 \
+   @TARGET_bcm27xx +kmod-rp1-pio
+endef
+
+define KernelPackage/pwm-pio-rp1/description
+  Enables precise control of PWM signals for tasks like motor control,
+  LED dimming, and audio signal generation. Leveraging PIO allows for
+  higher accuracy and flexibility in PWM signal generation compared
+  to traditional hardware timers.
+endef
+
+$(eval $(call KernelPackage,pwm-pio-rp1))