1、首先用万用表确定好vcc 2.8v和1.8v的供电正常，有的平台2.8v是软件控制打开，有的平台是直接硬件长供的。 2、根据原理图确定好gpio的配置主要包括spi_cs,spi_sck，spi_miso，spi_mosi，还有复位脚rst和中断脚int:，使用的是哪一组SPI通讯等。 3、dts添加cdfinger 的节点，gpio的配置等，注意查看所使用的gpio是否有其他地方有复用: vim kernel-3.18/arch/arm/boot/dts/alongk80_bsp.dts &cdfinger { compatible = "cdfinger,fps1098"; reg = <0>; interrupt-parent = <&eintc>; interrupts = <83 IRQ_TYPE_EDGE_RISING>; debounce = <83 0>; vdd_ldo_enable = <0>; vio_ldo_enable = <0>; config_spi_pin = <1>; spi-max-frequency = <8000000>; pinctrl-names = "fingerprint_reset_high", "fingerprint_reset_low", "fingerprint_spi_miso", "fingerprint_spi_mosi", "fingerprint_spi_sck", "fingerprint_spi_cs", "fingerprint_irq"; pinctrl-0 = <&fps_reset_high>; pinctrl-1 = <&fps_reset_low>; pinctrl-2 = <&fps_spi_miso>; pinctrl-3 = <&fps_spi_mosi>; pinctrl-4 = <&fps_spi_sck>; pinctrl-5 = <&fps_spi_cs>; pinctrl-6 = <&fps_irq>; status = "okay"; }; &pio { fps_reset_high: fps_reset_high { pins_cmd_dat { pins = ; slew-rate = <1>; bias-disable; output-high; }; }; fps_reset_low: fps_reset_low { pins_cmd_dat { pins = ; slew-rate = <1>; bias-disable; output-low; }; }; fps_spi_miso:fps_spi_miso@gpio3{ pins_cmd_dat { pins = ; slew-rate = <0>; bias-pull-up = <11>; output-low; }; }; fps_spi_mosi:fps_spi_mosi@gpio2{ pins_cmd_dat { pins = ; slew-rate = <1>; bias-pull-up = <11>; output-low; }; }; fps_spi_sck:fps_spi_sck@gpio1{ pins_cmd_dat { pins = ; slew-rate = <1>; bias-pull-up = <11>; output-low; }; }; fps_spi_cs:fps_spi_cs@gpio0{ pins_cmd_dat { pins = ; slew-rate = <1>; bias-pull-up = <11>; output-low; }; }; fps_irq: fps_irq { pins_cmd_dat { pins = ; slew-rate = <0>; bias-disable; output-low; }; }; };   4、mt6580.dts添加pmic的配置 vim /kernel-3.18/arch/arm/boot/dts/mt6580.dts @@ -773,6 +773,13 @@                         #size-cells = <0>;                 }; +               +               cdfinger:cdfinger@ { +                       compatible = "cdfinger,fps1098"; +                       finger-supply = <&mt_pmic_vgp1_ldo_reg>; +               }; +               5、defconfig打开要编译驱动的宏配置 vim kernel-3.18/arch/arm/configs/alongk80_bsp_debug_defconfig +# for finger +CONFIG_MTK_FINGERPRINT_SUPPORT=y +CONFIG_CDFINGER_FP_REE_FINGERPRINT=y vim kernel-3.18/arch/arm/configs/alongk80_bsp_defconfig +# for finger +CONFIG_MTK_FINGERPRINT_SUPPORT=y +CONFIG_CDFINGER_FP_REE_FINGERPRINT=y 6、修改Makefile和Kconfig文件: vim /kernel-3.18/drivers/input/fingerprint/Kconfig +config CDFINGER_FP_REE_FINGERPRINT +       bool "Mediatek cdfinger_fp_ree Fingerprint" +       default n +       ---help--- +       Fingerprint mtk driver enable/disable in the kernel. +       Say Y here if you want to use mediatek fingerprint driver, +       fingerprint driver will support fingerprint function + vim kernel-3.18/drivers/input/fingerprint/Makefile obj-$(CONFIG_CDFINGER_FP_REE_FINGERPRINT) += cdfinger_fp_ree/ 把驱动文件放到对应kernel目录: kernel-3.18/drivers/input/fingerprint/cdfinger_fp_ree/ 7、使用gpio工具配置gpio配置文件dws， kernel-3.18/drivers/misc/mediatek/dws/mt6580/alongk80_bsp.dws 把kernel下的dws文件拷贝到其它对应目录，注意名称跟kernel不一样 vendor/mediatek/proprietary/bootable/bootloader/lk/target/alongk80_bsp/dct/dct/codegen.dws vendor/mediatek/proprietary/bootable/bootloader/preloader/custom/alongk80_bsp/dct/dct/codegen.dws vendor/mediatek/proprietary/custom/alongk80_bsp/kernel/dct/dct/codegen.dws 然后编译kernel-3.18,驱动加载运行成功后会生成/dev/fpsdev0 的驱动设备节点。 8、上层的移植: SELinux 权 限 位 于 软 件 包 android/device/cdfinger/sepolicy 目 录 下 , 其 中cdfinger.te 为新增文件,其它文件是在源码上追加。将 cdfinger 整个文件夹放到源 码 device 目 录 下 。 若 需 放 到 其 它 目 录 , 把 Android.mk 和 cdfinger_product_32bit.mk/cdfinger_product_64bit.mk 中 LOCAL_PATH 改成相应目录即可。 编译时 cdfinger 目录下的 Android.mk 中使用 BOARD_SEPOLICY_DIRS 将会把权限加入源码中。加入权限后第一次编译需要删除之前的中间文件,保证改动生效: rm-rf out/target/product/xxxx/obj/ETC/sepolicy_intermediates 即把cdfinger文件夹拷贝到device目录下，注意使用的是64bit还算32bit，一般保留一个即可，本案例使用32bit的驱动，故没有把64bit的库文件放进device/cdfinger目录，而且使用cdfinger_product_32bit.mk文件。 修改device/along/alongk80_bsp/device.mk --- a/device/along/alongk80_bsp/device.mk +++ b/device/along/alongk80_bsp/device.mk @@ -183,3 +183,9 @@ PRODUCT_PACKAGES +=              FactoryTest              MtkSoundRecorder  # end by chengl + +# add for cdfinger start by caizd +PRODUCT_PACKAGES += android.hardware.biometrics.fingerprint@2.1-service + +$(call inherit-product, device/cdfinger/cdfinger_product_32bit.mk) +# add for cdfinger end by caizd vim device/mediatek/mt6580/manifest.xml添加cdfinger在设置的菜单选项:  +         +        android.hardware.biometrics.fingerprint +        hwbinder +        2.1 +         +            IBiometricsFingerprint +            default +         +     9、在system/core/rootdir/init.rc 添加init.cdfinger.rc文件的引用: +++ b/system/core/rootdir/init.rc @@ -11,6 +11,10 @@ import /vendor/etc/init/hw/init.${ro.hardware}.rc  import /init.usb.configfs.rc  import /init.${ro.zygote}.rc +# add for cdfinger start by caizd +import /init.cdfinger.rc +# add for cdfinger end by caizd  +