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kernel: Build: Split kmod-regmap

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This reduces the needed modifications to the mainline Linux kernel and
also makes the regmap package work with an out of tree kernel which
does not have these modifications.

The regmap-core is only added when it is really build as a module.
The regmap-core is normally bool so it cannot be built as a module in an
unmodified kernel. When it is selected by on other kernel module it will
always be selected as build in and it also does not show up in
$(LINUX_DIR)/modules.builtin as it is not supposed to be a kernel module.
When it is not in $(LINUX_DIR)/modules.builtin the build system expects
it to be built as a .ko file.
Just check if the module is really there and only add it in that case.

This splits the regmap package into multiple packages, one for each bus type.
This way only the bus maps which are really needed have to be added.
This also splits the I2C, SPI and MMIO regmap into separate packages to not
require all these subsystems to build them, on an unmodified upstream kernel
this also causes problems in some situations.

Signed-off-by: Hauke Mehrtens <hauke.mehrtens@intel.com>
This commit is contained in:
Hauke Mehrtens
2019-01-11 18:05:11 +01:00
committed by Hauke Mehrtens
parent 538127cf98
commit fd5c168701
13 changed files with 101 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
package/kernel/linux/modules/other.mk
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@@ -30,7 +30,7 @@ $(eval $(call KernelPackage,6lowpan))
define KernelPackage/bluetooth
SUBMENU:=$(OTHER_MENU)
TITLE:=Bluetooth support
DEPENDS:=@USB_SUPPORT +kmod-usb-core +kmod-crypto-hash +kmod-crypto-ecb +kmod-lib-crc16 +kmod-hid +!LINUX_3_18:kmod-crypto-cmac +!LINUX_3_18:kmod-regmap +!(LINUX_3_18||LINUX_4_9):kmod-crypto-ecdh
DEPENDS:=@USB_SUPPORT +kmod-usb-core +kmod-crypto-hash +kmod-crypto-ecb +kmod-lib-crc16 +kmod-hid +!LINUX_3_18:kmod-crypto-cmac +!LINUX_3_18:kmod-regmap-core +!(LINUX_3_18||LINUX_4_9):kmod-crypto-ecdh
KCONFIG:= \
CONFIG_BT \
CONFIG_BT_BREDR=y \
@@ -172,7 +172,7 @@ define KernelPackage/eeprom-at24
SUBMENU:=$(OTHER_MENU)
TITLE:=EEPROM AT24 support
KCONFIG:=CONFIG_EEPROM_AT24
DEPENDS:=+kmod-i2c-core +kmod-nvmem +LINUX_4_19:kmod-regmap
DEPENDS:=+kmod-i2c-core +kmod-nvmem +LINUX_4_19:kmod-regmap-i2c
FILES:=$(LINUX_DIR)/drivers/misc/eeprom/at24.ko
AUTOLOAD:=$(call AutoProbe,at24)
endef
@@ -219,7 +219,7 @@ $(eval $(call KernelPackage,gpio-dev))
define KernelPackage/gpio-mcp23s08
SUBMENU:=$(OTHER_MENU)
TITLE:=Microchip MCP23xxx I/O expander
DEPENDS:=@GPIO_SUPPORT +kmod-i2c-core +!(LINUX_3_18||LINUX_4_9):kmod-regmap
DEPENDS:=@GPIO_SUPPORT +kmod-i2c-core +!(LINUX_3_18||LINUX_4_9):kmod-regmap-i2c
KCONFIG:= \
CONFIG_GPIO_MCP23S08 \
CONFIG_PINCTRL_MCP23S08
@@ -476,7 +476,7 @@ define KernelPackage/rtc-ds1307
SUBMENU:=$(OTHER_MENU)
TITLE:=Dallas/Maxim DS1307 (and compatible) RTC support
DEFAULT:=m if ALL_KMODS && RTC_SUPPORT
DEPENDS:=+kmod-i2c-core +!(LINUX_3_18||LINUX_4_9):kmod-regmap +!(LINUX_3_18||LINUX_4_9):kmod-hwmon-core
DEPENDS:=+kmod-i2c-core +!(LINUX_3_18||LINUX_4_9):kmod-regmap-i2c +!(LINUX_3_18||LINUX_4_9):kmod-hwmon-core
KCONFIG:=CONFIG_RTC_DRV_DS1307 \
CONFIG_RTC_CLASS=y
FILES:=$(LINUX_DIR)/drivers/rtc/rtc-ds1307.ko
@@ -710,32 +710,71 @@ endef
$(eval $(call KernelPackage,serial-8250-exar))
define KernelPackage/regmap
define KernelPackage/regmap-core
SUBMENU:=$(OTHER_MENU)
TITLE:=Generic register map support
DEPENDS:=+kmod-lib-lzo +kmod-i2c-core
KCONFIG:=CONFIG_REGMAP \
CONFIG_REGMAP_MMIO \
CONFIG_REGMAP_SPI \
CONFIG_REGMAP_I2C \
CONFIG_SPI=y
FILES:= \
$(LINUX_DIR)/drivers/base/regmap/regmap-i2c.ko \
$(LINUX_DIR)/drivers/base/regmap/regmap-mmio.ko \
$(if $(CONFIG_SPI),$(LINUX_DIR)/drivers/base/regmap/regmap-spi.ko)
AUTOLOAD:=$(call AutoLoad,21,regmap-core regmap-i2c regmap-mmio regmap-spi)
ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
FILES += $(LINUX_DIR)/drivers/base/regmap/regmap-core.ko
endif
endif
HIDDEN:=1
KCONFIG:=CONFIG_REGMAP
ifneq ($(wildcard $(LINUX_DIR)/drivers/base/regmap/regmap-core.ko),)
FILES:=$(LINUX_DIR)/drivers/base/regmap/regmap-core.ko
endif
endef
define KernelPackage/regmap/description
define KernelPackage/regmap-core/description
Generic register map support
endef
$(eval $(call KernelPackage,regmap))
$(eval $(call KernelPackage,regmap-core))
define KernelPackage/regmap-spi
SUBMENU:=$(OTHER_MENU)
TITLE:=SPI register map support
DEPENDS:=+kmod-regmap-core
HIDDEN:=1
KCONFIG:=CONFIG_REGMAP_SPI \
CONFIG_SPI=y
FILES:=$(LINUX_DIR)/drivers/base/regmap/regmap-spi.ko
endef
define KernelPackage/regmap-spi/description
SPI register map support
endef
$(eval $(call KernelPackage,regmap-spi))
define KernelPackage/regmap-i2c
SUBMENU:=$(OTHER_MENU)
TITLE:=I2C register map support
DEPENDS:=+kmod-regmap-core +kmod-i2c-core
HIDDEN:=1
KCONFIG:=CONFIG_REGMAP_I2C
FILES:=$(LINUX_DIR)/drivers/base/regmap/regmap-i2c.ko
endef
define KernelPackage/regmap-i2c/description
I2C register map support
endef
$(eval $(call KernelPackage,regmap-i2c))
define KernelPackage/regmap-mmio
SUBMENU:=$(OTHER_MENU)
TITLE:=MMIO register map support
DEPENDS:=+kmod-regmap-core
HIDDEN:=1
KCONFIG:=CONFIG_REGMAP_MMIO
FILES:=$(LINUX_DIR)/drivers/base/regmap/regmap-mmio.ko
endef
define KernelPackage/regmap-mmio/description
MMIO register map support
endef
$(eval $(call KernelPackage,regmap-mmio))
define KernelPackage/ikconfig
SUBMENU:=$(OTHER_MENU)
@@ -996,7 +1035,7 @@ $(eval $(call KernelPackage,echo))
define KernelPackage/bmp085
SUBMENU:=$(OTHER_MENU)
TITLE:=BMP085/BMP18x pressure sensor
DEPENDS:= +kmod-regmap @!LINUX_3_18
DEPENDS:= +kmod-regmap-core @!LINUX_3_18
KCONFIG:= CONFIG_BMP085
FILES:= $(LINUX_DIR)/drivers/misc/bmp085.ko
endef