initial buildroot for linux 5.15

package/i2c-tools/Config.in

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+config BR2_PACKAGE_I2C_TOOLS
+	bool "i2c-tools"
+	depends on BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
+	help
+	  Heterogeneous set of I2C tools for Linux
+
+	  This package contains a heterogeneous set of I2C tools for
+	  Linux: a bus probing tool, a chip dumper, register-level
+	  access helpers, EEPROM decoding scripts, and more.
+
+	  https://i2c.wiki.kernel.org/index.php/I2C_Tools

package/i2c-tools/i2c-tools.hash

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+# From https://www.kernel.org/pub/software/utils/i2c-tools/sha256sums.asc
+sha256  1f899e43603184fac32f34d72498fc737952dbc9c97a8dd9467fadfdf4600cf9  i2c-tools-4.3.tar.xz
+
+# License files
+sha256  ab15fd526bd8dd18a9e77ebc139656bf4d33e97fc7238cd11bf60e2b9b8666c6  COPYING
+sha256  dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING.LGPL
+sha256  2293b6e9076984d02184ff620baac557143e16cfa47d88f0a791d05a1271742c  README

package/i2c-tools/i2c-tools.mk

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+################################################################################
+#
+# i2c-tools
+#
+################################################################################
+
+I2C_TOOLS_VERSION = 4.3
+I2C_TOOLS_SOURCE = i2c-tools-$(I2C_TOOLS_VERSION).tar.xz
+I2C_TOOLS_SITE = https://www.kernel.org/pub/software/utils/i2c-tools
+I2C_TOOLS_LICENSE = GPL-2.0+, GPL-2.0 (py-smbus), LGPL-2.1+ (libi2c)
+I2C_TOOLS_LICENSE_FILES = COPYING COPYING.LGPL README
+I2C_TOOLS_CPE_ID_VENDOR = i2c-tools_project
+I2C_TOOLS_MAKE_OPTS = EXTRA=eeprog
+I2C_TOOLS_INSTALL_STAGING = YES
+
+ifeq ($(BR2_PACKAGE_PYTHON),y)
+I2C_TOOLS_DEPENDENCIES += python
+endif
+
+ifeq ($(BR2_PACKAGE_PYTHON3),y)
+I2C_TOOLS_DEPENDENCIES += python3
+endif
+
+ifeq ($(BR2_STATIC_LIBS),y)
+I2C_TOOLS_MAKE_OPTS += BUILD_DYNAMIC_LIB=0 USE_STATIC_LIB=1
+endif
+
+ifeq ($(BR2_SHARED_LIBS),y)
+I2C_TOOLS_MAKE_OPTS += BUILD_STATIC_LIB=0
+endif
+
+# Build/install steps mirror the distutil python package type in the python package
+# infrastructure
+ifeq ($(BR2_PACKAGE_PYTHON)$(BR2_PACKAGE_PYTHON3),y)
+# BASE_ENV taken from PKG_PYTHON_DISTUTILS_ENV in package/pkg-python.mk
+I2C_TOOLS_PYTHON_BASE_ENV = \
+	$(PKG_PYTHON_DISTUTILS_ENV) \
+	CFLAGS="$(TARGET_CFLAGS) -I../include"
+
+define I2C_TOOLS_BUILD_PYSMBUS
+	(cd $(@D)/py-smbus; \
+	$(I2C_TOOLS_PYTHON_BASE_ENV) \
+		$(HOST_DIR)/bin/python setup.py build \
+		$(PKG_PYTHON_DISTUTILS_BUILD_OPTS))
+endef
+
+define I2C_TOOLS_INSTALL_PYSMBUS
+	(cd $(@D)/py-smbus; \
+	$(I2C_TOOLS_PYTHON_BASE_ENV) \
+		$(HOST_DIR)/bin/python setup.py install \
+		$(PKG_PYTHON_DISTUTILS_INSTALL_TARGET_OPTS))
+endef
+
+endif # BR2_PACKAGE_PYTHON
+
+define I2C_TOOLS_BUILD_CMDS
+	$(MAKE) $(TARGET_CONFIGURE_OPTS) $(I2C_TOOLS_MAKE_OPTS) -C $(@D)
+	$(I2C_TOOLS_BUILD_PYSMBUS)
+endef
+
+define I2C_TOOLS_INSTALL_TARGET_CMDS
+	$(MAKE) $(TARGET_CONFIGURE_OPTS) $(I2C_TOOLS_MAKE_OPTS) \
+		DESTDIR="$(TARGET_DIR)" PREFIX=/usr -C $(@D) install
+	$(I2C_TOOLS_INSTALL_PYSMBUS)
+endef
+
+define I2C_TOOLS_INSTALL_STAGING_CMDS
+	$(MAKE) $(TARGET_CONFIGURE_OPTS) $(I2C_TOOLS_MAKE_OPTS) \
+		DESTDIR="$(STAGING_DIR)" PREFIX=/usr -C $(@D) install
+endef
+
+$(eval $(generic-package))