Support for RPI-RF-MOD/HM-MOD-RPI-PCB for HomeMatic/homematicIP communication (#1266)

* add eq3_char_loop package (eQ-3 char loopback kernel module)

* add generic_raw_uart package (low-latency raw UART kernel driver)

* add rpi-rf-mod package 

* add device tree overlay support for RPI-RF-MOD/HM-MOD-RPI-PCB on Raspberry Pi

* enable GPIOLIB and GPIO_SYSFS required for RPI-RF-MOD/HM-MOD-RPI-PCB support.

* add basic RPI-RF-MOD/HM-MOD-RPI-PCB support for ASUS Tinker Board

* add device tree overlay support for ASUS Tinker Board and add
haos-config.txt loading support to U-Boot boot script

buildroot-external/Config.in

@@ -8,3 +8,6 @@ source "$BR2_EXTERNAL_HASSOS_PATH/package/rpi-eeprom/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/rtl8812au/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/os-agent/Config.in"
 source "$BR2_EXTERNAL_HASSOS_PATH/package/udisks2/Config.in"
+source "$BR2_EXTERNAL_HASSOS_PATH/package/eq3_char_loop/Config.in"
+source "$BR2_EXTERNAL_HASSOS_PATH/package/generic_raw_uart/Config.in"
+source "$BR2_EXTERNAL_HASSOS_PATH/package/rpi-rf-mod/Config.in"

buildroot-external/board/asus/hassos-hook.sh

@@ -10,6 +10,10 @@ function hassos_pre_image() {
         "${BINARIES_DIR}/rk3288-tinker.dtb" \
         "${BINARIES_DIR}/rk3288-tinker-s.dtb"
 
+    mkdir -p "${BOOT_DATA}/overlays"
+    cp "${BINARIES_DIR}"/*.dtbo "${BOOT_DATA}/overlays/"
+    cp "${BOARD_DIR}/boot-env.txt" "${BOOT_DATA}/haos-config.txt"
+
     echo "console=tty1" > "${BOOT_DATA}/cmdline.txt"
 
     # SPL

buildroot-external/board/asus/tinker/boot-env.txt

@@ -0,0 +1,2 @@
+# Uncomment this to enable GPIO support for RPI-RF-MOD/HM-MOD-RPI-PCB
+#overlays=rpi-rf-mod

buildroot-external/board/asus/tinker/uboot-boot.ush

@@ -23,14 +23,37 @@ setenv bootargs_hassos "zram.enabled=1 zram.num_devices=3 apparmor=1 security=ap
 setenv bootargs_a "root=PARTUUID=8d3d53e3-6d49-4c38-8349-aff6859e82fd rootfstype=squashfs ro rootwait"
 setenv bootargs_b "root=PARTUUID=a3ec664e-32ce-4665-95ea-7ae90ce9aa20 rootfstype=squashfs ro rootwait"
 
+# Load environment from haos-config.txt
+if test -e mmc ${devnum}:1 haos-config.txt; then
+  fatload mmc ${devnum}:1 ${ramdisk_addr_r} haos-config.txt
+  env import -t ${ramdisk_addr_r} ${filesize}
+fi
+
 # Load extraargs
 fileenv mmc ${devnum}:1 ${ramdisk_addr_r} cmdline.txt cmdline
 
 # Load device tree
 if test "$devnum" = "0"; then
-  fatload mmc ${devnum}:1 ${fdt_addr_r} rk3288-tinker-s.dtb
+  setenv fdtfile "rk3288-tinker-s.dtb"
 else
-  fatload mmc ${devnum}:1 ${fdt_addr_r} rk3288-tinker.dtb
+  setenv fdtfile "rk3288-tinker.dtb"
+fi
+
+echo "Loading standard device tree ${fdtfile}"
+fatload mmc ${devnum}:1 ${fdt_addr_r} ${fdtfile}
+fdt addr ${fdt_addr_r}
+
+# load dt overlays
+fdt resize 65536
+for overlay_file in ${overlays}; do
+  if fatload mmc ${devnum}:1 ${ramdisk_addr_r} overlays/${overlay_file}.dtbo; then
+    echo "Applying kernel provided DT overlay ${overlay_file}.dtbo"
+    fdt apply ${ramdisk_addr_r} || setenv overlay_error "true"
+  fi
+done
+if test "${overlay_error}" = "true"; then
+  echo "Error applying DT overlays, restoring original DT"
+  fatload mmc ${devnum}:1 ${fdt_addr_r} ${fdtfile}
 fi
 
 setenv bootargs

buildroot-external/board/asus/tinker/uboot.config

@@ -1,2 +1,3 @@
 # CONFIG_USB_STORAGE is not set
 # CONFIG_DOS_PARTITION is not set
+CONFIG_OF_LIBFDT_OVERLAY=y

buildroot-external/board/raspberrypi/boot-env.txt

@@ -60,6 +60,12 @@ kernel=u-boot.bin
 # Uncomment this to enable the lirc-rpi module
 #dtoverlay=lirc-rpi
 
+# Uncomment this to enable GPIO support for RPI-RF-MOD/HM-MOD-RPI-PCB
+#enable_uart=1
+#dtparam=i2c_arm=on
+#dtoverlay=miniuart-bt
+#dtoverlay=rpi-rf-mod
+
 # Additional overlays and parameters are documented /boot/overlays/README
 
 # Enable audio (loads snd_bcm2835)

buildroot-external/board/raspberrypi/hassos-hook.sh

@@ -10,6 +10,7 @@ function hassos_pre_image() {
     cp "${BINARIES_DIR}"/*.dtb "${BOOT_DATA}/"
     cp -r "${BINARIES_DIR}/rpi-firmware/"* "${BOOT_DATA}/"
     cp "${BOARD_DIR}/../boot-env.txt" "${BOOT_DATA}/config.txt"
+    cp "${BINARIES_DIR}"/*.dtbo "${BOOT_DATA}/overlays/"
 
     # EEPROM update for Raspberry Pi 4/Compute Module 4
     if grep -Eq "^BR2_PACKAGE_RPI_EEPROM=y$" "${BR2_CONFIG}"; then

buildroot-external/configs/generic_x86_64_defconfig

@@ -114,3 +114,4 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_INTEL_E1000E=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y

buildroot-external/configs/odroid_c2_defconfig

@@ -111,3 +111,4 @@ BR2_PACKAGE_HARDKERNEL_BOOT_ODROID_C2=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
 BR2_PACKAGE_RTL8812AU=y
+BR2_PACKAGE_RPI_RF_MOD=y

buildroot-external/configs/odroid_c4_defconfig

@@ -109,3 +109,4 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_HARDKERNEL_BOOT=y
 BR2_PACKAGE_HARDKERNEL_BOOT_ODROID_C4=y
 BR2_PACKAGE_RTL8812AU=y
+BR2_PACKAGE_RPI_RF_MOD=y

buildroot-external/configs/odroid_n2_defconfig

@@ -111,3 +111,4 @@ BR2_PACKAGE_HARDKERNEL_BOOT_ODROID_N2=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
 BR2_PACKAGE_RTL8812AU=y
+BR2_PACKAGE_RPI_RF_MOD=y

buildroot-external/configs/odroid_xu4_defconfig

@@ -114,3 +114,4 @@ BR2_PACKAGE_HARDKERNEL_BOOT_ODROID_XU4=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
 BR2_PACKAGE_RTL8812AU=y
+BR2_PACKAGE_RPI_RF_MOD=y

buildroot-external/configs/ova_defconfig

@@ -115,3 +115,4 @@ BR2_PACKAGE_APPARMOR_PROFILES=y
 BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y

buildroot-external/configs/rpi0_w_defconfig

@@ -108,3 +108,5 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_BLUETOOTH_BCM43XX=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/rpi2_defconfig

@@ -109,3 +109,5 @@ BR2_PACKAGE_APPARMOR_PROFILES=y
 BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/rpi3_64_defconfig

@@ -108,3 +108,5 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_BLUETOOTH_BCM43XX=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/rpi3_defconfig

@@ -108,3 +108,5 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_BLUETOOTH_BCM43XX=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/rpi4_64_defconfig

@@ -111,3 +111,5 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_BLUETOOTH_BCM43XX=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/rpi4_defconfig

@@ -109,3 +109,5 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_BLUETOOTH_BCM43XX=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/rpi_defconfig

@@ -109,3 +109,5 @@ BR2_PACKAGE_APPARMOR_PROFILES=y
 BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y

buildroot-external/configs/tinker_defconfig

@@ -31,6 +31,7 @@ BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_HASSOS_PATH)/kernel/hasso
 BR2_LINUX_KERNEL_LZ4=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="rk3288-tinker rk3288-tinker-s"
+BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT=y
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF=y
 BR2_PACKAGE_BUSYBOX_CONFIG="$(BR2_EXTERNAL_HASSOS_PATH)/busybox.config"
@@ -113,3 +114,6 @@ BR2_PACKAGE_LIBCURL_CURL=y
 BR2_PACKAGE_BLUETOOTH_RTL8723=y
 BR2_PACKAGE_DOSFSTOOLS=y
 BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
+BR2_PACKAGE_RPI_RF_MOD=y
+BR2_PACKAGE_RPI_RF_MOD_DTS=y
+BR2_PACKAGE_RPI_RF_MOD_DTS_TINKER=y

buildroot-external/kernel/device-support.config

@@ -156,6 +156,10 @@ CONFIG_SND_HDA_CODEC_ANALOG=m
 CONFIG_SND_HDA_CODEC_VIA=m
 CONFIG_SND_HDA_CODEC_HDMI=m
 
+# GPIO support
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_SYSFS=y
+
 # Can Bus support
 CONFIG_CAN=m
 CONFIG_CAN_RAW=m

buildroot-external/package/eq3_char_loop/0001-Makefile.patch

@@ -0,0 +1,4 @@
+--- ./KernelDrivers/Makefile.orig	2021-04-02 17:01:07.029932165 +0200
++++ ./KernelDrivers/Makefile	2020-06-04 14:36:10.188174788 +0200
+@@ -0,0 +1 @@
++obj-m += eq3_char_loop.o

buildroot-external/package/eq3_char_loop/0002-version1_1.patch

@@ -0,0 +1,109 @@
+--- ./KernelDrivers/eq3_char_loop.c.orig	2017-05-14 22:57:19.109181928 +0200
++++ ./KernelDrivers/eq3_char_loop.c	2020-06-04 14:36:10.188174788 +0200
+@@ -48,8 +48,8 @@
+ /* Use 'L' as magic number */
+ #define EQ3LOOP_IOC_MAGIC  'L'
+ 
+-#define EQ3LOOP_IOCSCREATESLAVE _IOW(EQ3LOOP_IOC_MAGIC,  1, unsigned long)
+-#define EQ3LOOP_IOCGEVENTS _IOR(EQ3LOOP_IOC_MAGIC,  2, unsigned long)
++#define EQ3LOOP_IOCSCREATESLAVE _IOW(EQ3LOOP_IOC_MAGIC,  1, uint32_t)
++#define EQ3LOOP_IOCGEVENTS _IOR(EQ3LOOP_IOC_MAGIC,  2, uint32_t)
+ 
+ #define EVENT_BIT_SLAVE_OPENED 0
+ #define EVENT_BIT_SLAVE_CLOSED 1
+@@ -62,6 +62,12 @@
+ 
+ #define DUMP_READWRITE 0
+ 
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0))
++  #define _access_ok(__type, __addr, __size) access_ok(__addr, __size)
++#else
++  #define _access_ok(__type, __addr, __size) access_ok(__type, __addr, __size)
++#endif
++
+ struct eq3loop_channel_data
+ {
+ 	struct circ_buf master2slave_buf;
+@@ -353,7 +359,7 @@
+ 	{
+ 		ret=-EFAULT;
+ 		count_to_end = CIRC_SPACE( head, channel->master2slave_buf.tail, BUFSIZE);
+-		printk( KERN_ERR EQ3LOOP_DRIVER_NAME ": eq3loop_write_master() %s: not enought space in the buffers. free space = %i, required space = %i", channel->name,count_to_end,count );
++		printk( KERN_ERR EQ3LOOP_DRIVER_NAME ": eq3loop_write_master() %s: not enough space in buffers. free space = %zu, required space = %zu", channel->name,count_to_end,count );
+ 		goto out;
+ 	}
+ 	/* ok, space is free, write something */
+@@ -389,7 +395,7 @@
+ 	up (&channel->sem);
+ 	if(ret < 0)
+ 	{
+-		printk( KERN_INFO EQ3LOOP_DRIVER_NAME ": eq3loop_write_master() retrun error:");
++		printk( KERN_INFO EQ3LOOP_DRIVER_NAME ": eq3loop_write_master() return error: %d", ret);
+ 	}
+ 	if( ret > 0 || CIRC_CNT(channel->master2slave_buf.head,channel->master2slave_buf.tail,BUFSIZE) )
+ 	{
+@@ -456,9 +462,9 @@
+ 	* "write" is reversed
+ 	*/
+ 	if (_IOC_DIR(cmd) & _IOC_READ)
+-	ret = !access_ok(VERIFY_WRITE, (void *)arg, _IOC_SIZE(cmd));
++	  ret = !_access_ok(VERIFY_WRITE, (void *)arg, _IOC_SIZE(cmd));
+ 	else if (_IOC_DIR(cmd) & _IOC_WRITE)
+-	ret =  !access_ok(VERIFY_READ, (void *)arg, _IOC_SIZE(cmd));
++	  ret =  !_access_ok(VERIFY_READ, (void *)arg, _IOC_SIZE(cmd));
+ 	if (ret) return -EFAULT;
+ 
+ 	switch(cmd) {
+@@ -500,7 +506,7 @@
+ 	switch(cmd) {
+ 
+ 	case TCGETS:
+-		if( access_ok(VERIFY_READ, (void *)arg, sizeof(struct termios) ) )
++		if( _access_ok(VERIFY_READ, (void *)arg, sizeof(struct termios) ) )
+ 		{
+ 			ret = copy_to_user( (void*)arg, &channel->termios, sizeof(struct termios) );
+ 		} else {
+@@ -508,7 +514,7 @@
+ 		}
+ 		break;
+ 	case TCSETS:
+-		if( access_ok(VERIFY_WRITE, (void *)arg, sizeof(struct termios) ) )
++		if( _access_ok(VERIFY_WRITE, (void *)arg, sizeof(struct termios) ) )
+ 		{
+ 			ret = copy_from_user( &channel->termios, (void*)arg, sizeof(struct termios) );
+ 		} else {
+@@ -533,6 +539,12 @@
+ 		break;
+ 	case TIOCMSET:
+ 		break;
++	case TIOCSERGETLSR:
++		ret = -ENOIOCTLCMD;
++		break;
++	case TIOCGICOUNT:
++		ret = -ENOIOCTLCMD;
++		break;
+ 	default:
+ 		ret = -ENOTTY;
+ 		break;
+@@ -541,6 +553,7 @@
+ 	if( ret == -ENOTTY )
+ 	{
+ 		printk( KERN_NOTICE EQ3LOOP_DRIVER_NAME ": eq3loop_ioctl_slave() %s: unhandled ioctl 0x%04X\n", channel->name, cmd );
++		ret = -ENOIOCTLCMD;
+ 	}
+ 	return ret;
+ }
+@@ -908,6 +921,7 @@
+ 	.ioctl      = eq3loop_ioctl,
+ #else
+ 	.unlocked_ioctl = eq3loop_ioctl,
++	.compat_ioctl = eq3loop_ioctl,
+ #endif
+ };
+ 
+@@ -979,4 +993,4 @@
+ module_exit(eq3loop_exit);
+ MODULE_DESCRIPTION("eQ-3 IPC loopback char driver");
+ MODULE_LICENSE("GPL");
+-
++MODULE_VERSION("1.1");

buildroot-external/package/eq3_char_loop/Config.in

@@ -0,0 +1,2 @@
+config BR2_PACKAGE_EQ3_CHAR_LOOP
+	bool "Support for eq3 char loop kernel module"

buildroot-external/package/eq3_char_loop/eq3_char_loop.mk

@@ -0,0 +1,18 @@
+#############################################################
+#
+# eQ-3 char loopback kernel module for HomeMatic/homematicIP
+# dual stack implementations for the RPI-RF-MOD/HM-MOD-RPI-PCB
+#
+# Copyright (c) 2015 by eQ-3 Entwicklung GmbH
+# https://github.com/eq-3/occu/tree/master/KernelDrivers
+#
+#############################################################
+
+EQ3_CHAR_LOOP_VERSION = 8cb51174c2bc8c4b33df50a96b82c90e8092f79c
+EQ3_CHAR_LOOP_SITE = $(call github,eq-3,occu,$(EQ3_CHAR_LOOP_VERSION))
+EQ3_CHAR_LOOP_LICENSE = GPL2
+#EQ3_CHAR_LOOP_LICENSE_FILES = LICENSE
+EQ3_CHAR_LOOP_MODULE_SUBDIRS = KernelDrivers
+
+$(eval $(kernel-module))
+$(eval $(generic-package))

buildroot-external/package/generic_raw_uart/0001-kernel-Makefile.patch

@@ -0,0 +1,39 @@
+--- ./kernel/Makefile.orig	2020-12-14 13:09:44.406823210 +0100
++++ ./kernel/Makefile	2021-01-14 11:37:37.524474444 +0100
+@@ -1,17 +1,26 @@
+-obj-m += eq3_char_loop.o
+-obj-m += plat_eq3ccu2.o
++#obj-m += eq3_char_loop.o
++#obj-m += plat_eq3ccu2.o
+ obj-m += generic_raw_uart.o
++ifeq ($(CONFIG_ARCH_BCM2835),y)
+ obj-m += pl011_raw_uart.o
++endif
++ifeq ($(CONFIG_ARCH_ROCKCHIP),y)
+ obj-m += dw_apb_raw_uart.o
++endif
++ifeq ($(CONFIG_ARCH_MESON64_ODROIDC2),y)
+ obj-m += meson_raw_uart.o
+-obj-m += fake_hmrf.o
++endif
++#obj-m += fake_hmrf.o
+ obj-m += rpi_rf_mod_led.o
+ obj-m += dummy_rx8130.o
+-obj-m += led_trigger_timer.o
++#obj-m += led_trigger_timer.o
+ obj-m += hb_rf_usb.o
+ obj-m += hb_rf_usb-2.o
+ obj-m += hb_rf_eth.o
+-obj-m += rtc-rx8130.o
++#obj-m += rtc-rx8130.o
++
++# disable
++ifeq (0,1)
+ 
+ ifeq ($(KERNELRELEASE),)
+   KERNELRELEASE := $(shell uname -r)
+@@ -32,3 +41,4 @@
+ clean:
+ 	$(MAKE) -C $(KERNEL_DIR) M=$(PWD) clean
+ 
++endif

buildroot-external/package/generic_raw_uart/Config.in

@@ -0,0 +1,7 @@
+config BR2_PACKAGE_GENERIC_RAW_UART
+  bool "Support for Generic RAW UART kernel module"
+  help
+    Adds support for generic-raw-uart kernel module
+
+    Alexander Reinert <alex@areinert.de>
+    https://github.com/alexreinert/piVCCU/tree/master/kernel

buildroot-external/package/generic_raw_uart/generic_raw_uart.mk

@@ -0,0 +1,23 @@
+#############################################################
+#
+# Generic raw uart kernel module for low-latency uart
+# communication with a RPI-RF-MOD/HM-MOD-RPI-PCB
+#
+# Copyright (c) 2021 Alexander Reinert
+# https://github.com/alexreinert/piVCCU/tree/master/kernel
+#
+# Uses parts of bcm2835_raw_uart.c
+# Copyright (c) 2015 eQ-3 Entwicklung GmbH
+# https://github.com/eq-3/occu/tree/master/KernelDrivers
+# https://github.com/jens-maus/RaspberryMatic/tree/master/buildroot-external/package/bcm2835_raw_uart
+#
+#############################################################
+
+GENERIC_RAW_UART_VERSION = dab76ddd1d568cc4925dc778e43d70fccffdc0e8
+GENERIC_RAW_UART_SITE = $(call github,alexreinert,piVCCU,$(GENERIC_RAW_UART_VERSION))
+GENERIC_RAW_UART_LICENSE = GPL2
+#GENERIC_RAW_UART_LICENSE_FILES = LICENSE
+GENERIC_RAW_UART_MODULE_SUBDIRS = kernel
+
+$(eval $(kernel-module))
+$(eval $(generic-package))

buildroot-external/package/rpi-rf-mod/Config.in

@@ -0,0 +1,31 @@
+config BR2_PACKAGE_RPI_RF_MOD
+  select BR2_PACKAGE_EQ3_CHAR_LOOP
+  select BR2_PACKAGE_GENERIC_RAW_UART
+  bool "Support for RPI-RF-MOD/HM-MOD-RPI-PCB GPIO HAT"
+
+if BR2_PACKAGE_RPI_RF_MOD
+
+config BR2_PACKAGE_RPI_RF_MOD_DTS
+  bool "Compile Device Tree Overlay"
+
+if BR2_PACKAGE_RPI_RF_MOD_DTS
+
+choice
+  prompt "For Target"
+  default BR2_PACKAGE_RPI_RF_MOD_DTS_RPI
+
+config BR2_PACKAGE_RPI_RF_MOD_DTS_RPI
+  bool "RaspberryPi"
+  help
+    For the RaspberryPi
+
+config BR2_PACKAGE_RPI_RF_MOD_DTS_TINKER
+  bool "ASUS Tinkerboard"
+  help
+    For the ASUS Tinkerboard
+
+endchoice
+
+endif
+
+endif

buildroot-external/package/rpi-rf-mod/rpi-rf-mod.mk

@@ -0,0 +1,40 @@
+#############################################################
+#
+# Meta package for RPI-RF-MOD/HM-MOD-RPI-PCB device support
+# for HomeMatic/homematicIP connectivity.
+#
+# This includes compiling of required device tree overlays for
+# selected platforms
+#
+# Copyright (c) 2018-2021 Jens Maus <mail@jens-maus.de>
+# https://github.com/jens-maus/RaspberryMatic/tree/master/buildroot-external/package/rpi-rf-mod
+#
+#############################################################
+
+RPI_RF_MOD_VERSION = 97bd31203445d14e3d97e1d6e7a0bcf93b400c2e
+RPI_RF_MOD_SITE = $(call github,jens-maus,RaspberryMatic,$(RPI_RF_MOD_VERSION))
+RPI_RF_MOD_LICENSE = Apache-2.0
+RPI_RF_MOD_DEPENDENCIES = host-dtc
+#RPI_RF_MOD_LICENSE_FILES = LICENSE
+
+ifeq ($(BR2_PACKAGE_RPI_RF_MOD_DTS_RPI),y)
+  # RaspberryPi DTS file
+  RPI_RF_MOD_DTS_FILE = rpi-rf-mod
+else ifeq ($(BR2_PACKAGE_RPI_RF_MOD_DTS_TINKER),y)
+  # ASUS Tinkerboard DTS file
+  RPI_RF_MOD_DTS_FILE = rpi-rf-mod-tinker
+endif
+
+define RPI_RF_MOD_BUILD_CMDS
+  if [[ -n "$(RPI_RF_MOD_DTS_FILE)" ]]; then \
+    $(HOST_DIR)/bin/dtc -@ -I dts -O dtb -W no-unit_address_vs_reg -o $(@D)/buildroot-external/package/rpi-rf-mod/dts/rpi-rf-mod.dtbo $(@D)/buildroot-external/package/rpi-rf-mod/dts/$(RPI_RF_MOD_DTS_FILE).dts; \
+  fi
+endef
+
+define RPI_RF_MOD_INSTALL_TARGET_CMDS
+  if [[ -n "$(RPI_RF_MOD_DTS_FILE)" ]]; then \
+    $(INSTALL) -D -m 0644 $(@D)/buildroot-external/package/rpi-rf-mod/dts/rpi-rf-mod.dtbo $(BINARIES_DIR)/; \
+  fi
+endef
+
+$(eval $(generic-package))