bcm27xx/bcm2712: Fix-up RP1 modules

Correct a few mistakes around dependencies and naming and unset
CONFIG_FIRMWARE_RP1 in RPi5B's config and instead of a builtin, build it
as a module.

Without this change, there are two entries for rp1.ko in
/lib/modules/$(uname -r)/modules.builtin due to how we strip the leading
directories when we generate it. See: package/kernel/linux/Makefile
around line 63.

  % grep rp1.ko /lib/modules/$(uname -r)/modules.builtin
  pwm-rp1.ko
  clk-rp1.ko
  rp1.ko
  rp1.ko

The kernel log gets spammed with tons of superfluous warnings as a
results of the double entry:

  daemon.warn modprobe: found duplicate builtin module rp1

Signed-off-by: John Audia <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17461
Signed-off-by: Robert Marko <[email protected]>
Signed-off-by: Álvaro Fernández Rojas <[email protected]>
(cherry picked from commit f105d1a9a9739267fb25612d039c392a397775bd)

target/linux/bcm27xx/bcm2712/config-6.6

@@ -239,7 +239,7 @@ CONFIG_FB_DEVICE=y
 CONFIG_FB_IOMEM_FOPS=y
 CONFIG_FB_IOMEM_HELPERS=y
 CONFIG_FB_SIMPLE=y
-CONFIG_FIRMWARE_RP1=y
+# CONFIG_FIRMWARE_RP1 is not set
 CONFIG_FIXED_PHY=y
 CONFIG_FIX_EARLYCON_MEM=y
 CONFIG_FONT_8x16=y
@@ -372,7 +372,7 @@ CONFIG_MAGIC_SYSRQ=y
 CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1f6
 CONFIG_MAILBOX=y
 # CONFIG_MAILBOX_TEST is not set
-CONFIG_MBOX_RP1=y
+# CONFIG_MBOX_RP1 is not set
 CONFIG_MDIO_BCM_UNIMAC=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
@@ -537,7 +537,7 @@ CONFIG_RESET_RASPBERRYPI=y
 CONFIG_RESET_SIMPLE=y
 CONFIG_RFS_ACCEL=y
 CONFIG_RODATA_FULL_DEFAULT_ENABLED=y
-CONFIG_RP1_PIO=y
+# CONFIG_RP1_PIO is not set
 # CONFIG_RPI_POE_POWER is not set
 CONFIG_RPS=y
 CONFIG_RTC_CLASS=y
@@ -550,7 +550,7 @@ CONFIG_SCSI_COMMON=y
 # CONFIG_SCSI_LOWLEVEL is not set
 # CONFIG_SCSI_PROC_FS is not set
 CONFIG_SENSORS_RASPBERRYPI_HWMON=y
-CONFIG_SENSORS_RP1_ADC=y
+# CONFIG_SENSORS_RP1_ADC is not set
 CONFIG_SERIAL_8250_BCM2835AUX=y
 CONFIG_SERIAL_8250_BCM7271=y
 # CONFIG_SERIAL_8250_DMA is not set

target/linux/bcm27xx/modules/hwmon.mk

@@ -2,6 +2,23 @@
 #
 # Copyright (C) 2019 OpenWrt.org
 
+define KernelPackage/rp1-adc
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=RP1 ADC and temperature sensor driver
+  KCONFIG:=CONFIG_SENSORS_RP1_ADC
+  FILES:=$(LINUX_DIR)/drivers/hwmon/rp1-adc.ko
+  AUTOLOAD:=$(call AutoLoad,21,rp1-adc)
+  DEPENDS:=@TARGET_bcm27xx_bcm2712
+endef
+
+define KernelPackage/rp1-adc/description
+  Kernel module for RP1 silicon providing ADC and
+  temperature monitoring.
+endef
+
+$(eval $(call KernelPackage,rp1-adc))
+
+
 define KernelPackage/hwmon-raspberrypi
   TITLE:=Raspberry Pi voltage monitor
   KCONFIG:=CONFIG_SENSORS_RASPBERRYPI_HWMON
@@ -15,3 +32,5 @@ define KernelPackage/hwmon-raspberrypi/description
 endef
 
 $(eval $(call KernelPackage,hwmon-raspberrypi))
+
+

target/linux/bcm27xx/modules/other.mk

@@ -55,13 +55,46 @@ endef
 $(eval $(call KernelPackage,smi-bcm2835-dev))
 
 
+define KernelPackage/rp1
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=RP1 firmware
+  KCONFIG:=CONFIG_FIRMWARE_RP1
+  FILES:=$(LINUX_DIR)/drivers/firmware/rp1.ko
+  AUTOLOAD:=$(call AutoLoad,21,rp1)
+  DEPENDS:=@TARGET_bcm27xx_bcm2712
+endef
+
+define KernelPackage/rp1/description
+  This driver provides a firmware interface to the RP1 processor using shared
+  memory and a mailbox.
+endef
+
+$(eval $(call KernelPackage,rp1))
+
+
+define KernelPackage/rp1-pio
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=RP1 PIO block support
+  KCONFIG:=CONFIG_RP1_PIO
+  FILES:=$(LINUX_DIR)/drivers/misc/rp1-pio.ko
+  AUTOLOAD:=$(call AutoLoad,21,rp1-pio)
+  DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-rp1
+endef
+
+define KernelPackage/rp1-pio/description
+  Driver providing control of the Raspberry Pi PIO block, as found in RP1
+endef
+
+$(eval $(call KernelPackage,rp1-pio))
+
+
 define KernelPackage/pwm-pio-rp1
   SUBMENU:=$(OTHER_MENU)
   TITLE:=RP1 PWM support
   KCONFIG:=CONFIG_PWM_PIO_RP1
   FILES:=$(LINUX_DIR)/drivers/pwm/pwm-pio-rp1.ko
   AUTOLOAD:=$(call AutoLoad,21,pwm-pio-rp1)
-  DEPENDS:=@TARGET_bcm27xx_bcm2712
+  DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-rp1-pio
 endef
 
 define KernelPackage/pwm-pio-rp1/description
@@ -80,7 +113,7 @@ define KernelPackage/ws2812-pio-rp1
   KCONFIG:=CONFIG_WS2812_PIO_RP1
   FILES:=$(LINUX_DIR)/drivers/misc/ws2812-pio-rp1.ko
   AUTOLOAD:=$(call AutoLoad,21,ws2812-pio-rp1)
-  DEPENDS:=@TARGET_bcm27xx_bcm2712
+  DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-rp1-pio
 endef
 
 define KernelPackage/ws2812-pio-rp1/description
@@ -90,3 +123,36 @@ define KernelPackage/ws2812-pio-rp1/description
 endef
 
 $(eval $(call KernelPackage,ws2812-pio-rp1))
+
+
+define KernelPackage/rp1-mailbox
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=RP1 mailbox IPC driver
+  KCONFIG:=CONFIG_MBOX_RP1
+  FILES:=$(LINUX_DIR)/drivers/mailbox/rp1-mailbox.ko
+  AUTOLOAD:=$(call AutoLoad,21,rp1-mailbox)
+  DEPENDS:=@TARGET_bcm27xx_bcm2712
+endef
+
+define KernelPackage/rp1-mailbox/description
+  This is a RP1 mailbox IPC driver.
+endef
+
+$(eval $(call KernelPackage,rp1-mailbox))
+
+
+define KernelPackage/rp1-pio
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=RP1 PIO driver
+  KCONFIG:=CONFIG_RP1_PIO
+  FILES:=$(LINUX_DIR)/drivers/misc/rp1-pio.ko
+  AUTOLOAD:=$(call AutoLoad,21,rp1-pio)
+  DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-rp1
+endef
+
+define KernelPackage/rp1-pio/description
+  Driver for the RP1 PIO.
+endef
+
+$(eval $(call KernelPackage,rp1-pio))
+

target/linux/bcm27xx/modules/video.mk

@@ -156,7 +156,7 @@ define KernelPackage/drm-rp1-dpi
     CONFIG_DRM_TTM_HELPER=n
   FILES:=$(LINUX_DIR)/drivers/gpu/drm/rp1/rp1-dpi/drm-rp1-dpi.ko
   AUTOLOAD:=$(call AutoLoad,67,drm-rp1-dpi)
-  DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-drm-vc4
+  DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-drm-vc4 +kmod-rp1-pio
 endef
 
 define KernelPackage/drm-rp1-dpi/description