bcm27xx/bcm2712: add rp1 kmods

Initial draft at adding the following modules supported by the
RP1 I/O controller: rp1, rp1-mailbox, rp1-pio, and pwm-pio-rp1.

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

package/kernel/linux/modules/other.mk

@@ -1038,6 +1038,28 @@ endef
 $(eval $(call KernelPackage,keys-trusted))
 
 
+define KernelPackage/rp1
+  TITLE:=RP1 title
+  KCONFIG:= \
+           CONFIG_FIRMWARE_RP1 \
+           CONFIG_RP1_PIO \
+           CONFIG_COMMON_CLK_RP1_SDIO=y \
+           CONFIG_MBOX_RP1 \
+           CONFIG_PWM_PIO_RP1
+  FILES:= \
+           $(LINUX_DIR)/drivers/firmware/rp1.ko \
+           $(LINUX_DIR)/drivers/mailbox/rp1-mailbox.ko \
+           $(LINUX_DIR)/drivers/misc/rp1-pio.ko \
+           $(LINUX_DIR)/drivers/pwm/pwm-pio-rp1.ko
+  AUTOLOAD:=$(call AutoLoad,10,rp1)
+endef
+
+define KernelPackage/rp1/description
+  RP1 modules
+endef
+
+$(eval $(call KernelPackage,rp1))
+
 define KernelPackage/tpm
   SUBMENU:=$(OTHER_MENU)
   TITLE:=TPM Hardware Support

target/linux/bcm27xx/image/Makefile

@@ -201,7 +201,7 @@ 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
   IMAGE/sysupgrade.img.gz := boot-common | sdcard-img | gzip | append-metadata
   IMAGE/factory.img.gz := boot-common | sdcard-img | gzip
 endef