구차니의 잡동사니 모음

$ dtc

프로그램 'dtc'을(를) 설치하지 않습니다. 다음을 입력해 설치할 수 있습니다:

sudo apt-get install device-tree-compiler 

$ fdtdump bcm2709-rpi-2-b.dtb

/dts-v1/;

// magic:               0xd00dfeed

// totalsize:           0x163a (5690)

// off_dt_struct:       0x38

// off_dt_strings:      0x139c

// off_mem_rsvmap:      0x28

// version:             17

// last_comp_version:   16

// boot_cpuid_phys:     0x0

// size_dt_strings:     0x29e

// size_dt_struct:      0x1364

/ {

    #address-cells = <0x00000001>;

    #size-cells = <0x00000001>;

    compatible = "brcm,bcm2709";

    model = "Raspberry Pi 2 Model B";

    interrupt-parent = <0x00000001>;

    chosen {

        bootargs = [00];

    };

    aliases {

        soc = "/soc";

        spi0 = "/soc/spi@7e204000";

        i2c0 = "/soc/i2c@7e205000";

        i2c1 = "/soc/i2c@7e804000";

        i2s = "/soc/i2s@7e203000";

        gpio = "/soc/gpio";

        intc = "/soc/interrupt-controller";

        leds = "/soc/leds";

        sound = "/sound";

    };

    memory {

        device_type = "memory";

        reg = <0x00000000 0x736f6300>;

    };

    soc {

        compatible = "simple-bus";

        #address-cells = <0x00000001>;

        #size-cells = <0x00000001>;

        ranges = <0x7e000000 0x00000004 0x00000004>;

        linux,phandle = <0x00000013>;

        phandle = <0x00000013>;

        interrupt-controller {

            compatible = "brcm,bcm2708-armctrl-ic";

            reg = <0x7e00b200 0x00000097>;

            interrupt-controller;

            #interrupt-cells = <0x00000002>;

            linux,phandle = <0x00000001>;

            phandle = <0x00000001>;

        };

        gpio {

            compatible = "brcm,bcm2835-gpio";

            reg = <0x7e200000 0x000000bd>;

            interrupts = <0x00000002 0x00000003 0x00000004 0x00000000>;

            gpio-controller;

            #gpio-cells = <0x00000002>;

            interrupt-controller;

            #interrupt-cells = <0x00000002>;

            linux,phandle = <0x00000008>;

            phandle = <0x00000008>;

            spi0_pins {

                brcm,pins = <0x00000007 0x0000000b 0x00000004 0x00000004 0x00000004>;

                brcm,function = <0x00000004>;

                linux,phandle = <0x00000004>;

                phandle = <0x00000004>;

            };

            i2c0 {

                brcm,pins = <0x00000000 0x000000ee>;

                brcm,function = <0x00000004>;

                linux,phandle = <0x00000006>;

                phandle = <0x00000006>;

            };

            i2c1 {

                brcm,pins = <0x00000002 0x000000ee>;

                brcm,function = <0x00000004>;

                linux,phandle = <0x00000007>;

                phandle = <0x00000007>;

            };

            i2s {

                brcm,pins = <0x00000012 0x00000003 0x00000003 0x00000003>;

                brcm,function = <0x00000004>;

                linux,phandle = <0x00000002>;

                phandle = <0x00000002>;

            };

        };

        i2s@7e203000 {

            compatible = "brcm,bcm2708-i2s";

            reg = <0x7e203000 0x00000003 0x78000000 0x64697361>;

            dma-names = "tx", "rx";

            status = "disabled";

            #sound-dai-cells = <0x00000000>;

            pinctrl-names = "default";

            pinctrl-0 = <0x00000002>;

            linux,phandle = <0x0000000d>;

            phandle = <0x0000000d>;

        };

        spi@7e204000 {

            compatible = "brcm,bcm2708-spi";

            reg = <0x7e204000 0x000000bd>;

            interrupts = <0x00000002 0x00000136>;

            clocks = <0x00000003>;

            #address-cells = <0x00000001>;

            #size-cells = <0x00000000>;

            status = "disabled";

            pinctrl-names = "default";

            pinctrl-0 = <0x00000004>;

            linux,phandle = <0x0000000e>;

            phandle = <0x0000000e>;

            spidev@0 {

                compatible = "spidev";

                reg = <0x00000000>;

                #address-cells = <0x00000001>;

                #size-cells = <0x00000000>;

                spi-max-frequency = <0x0007a120>;

            };

            spidev@1 {

                compatible = "spidev";

                reg = <0x00000001>;

                #address-cells = <0x00000001>;

                #size-cells = <0x00000000>;

                spi-max-frequency = <0x0007a120>;

            };

        };

        i2c@7e205000 {

            compatible = "brcm,bcm2708-i2c";

            reg = <0x7e205000 0x000000bd>;

            interrupts = <0x00000002 0x00000136>;

            clocks = <0x00000005>;

            #address-cells = <0x00000001>;

            #size-cells = <0x00000000>;

            status = "disabled";

            pinctrl-names = "default";

            pinctrl-0 = <0x00000006>;

            clock-frequency = <0x000186a0>;

            linux,phandle = <0x0000000f>;

            phandle = <0x0000000f>;

        };

        i2c@7e804000 {

            compatible = "brcm,bcm2708-i2c";

            reg = <0x7e804000 0x000000bd>;

            interrupts = <0x00000002 0x00000136>;

            clocks = <0x00000005>;

            #address-cells = <0x00000001>;

            #size-cells = <0x00000000>;

            status = "disabled";

            pinctrl-names = "default";

            pinctrl-0 = <0x00000007>;

            clock-frequency = <0x000186a0>;

            linux,phandle = <0x00000010>;

            phandle = <0x00000010>;

        };

        leds {

            compatible = "gpio-leds";

            linux,phandle = <0x00000014>;

            phandle = <0x00000014>;

            act {

                label = "led0";

                linux,default-trigger = "mmc0";

                gpios = <0x00000008 0x00000004 0x00000004>;

                linux,phandle = <0x00000011>;

                phandle = <0x00000011>;

            };

            pwr {

                label = "led1";

                linux,default-trigger = "input";

                gpios = <0x00000008 0x00000004 0x00000004>;

                linux,phandle = <0x00000012>;

                phandle = <0x00000012>;

            };

        };

        arm-pmu {

            compatible = "arm,cortex-a7-pmu";

            interrupts = <0x00000003 0x00000001>;

        };

    };

    clocks {

        compatible = "simple-bus";

        #address-cells = <0x00000001>;

        #size-cells = <0x00000000>;

        i2c {

            compatible = "fixed-clock";

            reg = <0x00000001>;

            #clock-cells = <0x00000000>;

            clock-frequency = <0x0ee6b280>;

            linux,phandle = <0x00000005>;

            phandle = <0x00000005>;

        };

        clock@2 {

            compatible = "fixed-clock";

            reg = <0x00000002>;

            #clock-cells = <0x00000000>;

            clock-output-names = "spi";

            clock-frequency = <0x0ee6b280>;

            linux,phandle = <0x00000003>;

            phandle = <0x00000003>;

        };

    };

    timer {

        compatible = "arm,armv7-timer";

        clock-frequency = <0x0124f800>;

        interrupts = <0x00000003 0x00000003 0x00000003 0x00000001 0x00000004 0x00000004 0x00000004 0x00000004>;

        always-on;

    };

    cpus {

        #address-cells = <0x00000001>;

        #size-cells = <0x00000000>;

        linux,phandle = <0x00000015>;

        phandle = <0x00000015>;

        cpu@0 {

            device_type = "cpu";

            compatible = "arm,cortex-a7";

            reg = <0x00000f00>;

            clock-frequency = <0x2faf0800>;

            linux,phandle = <0x00000009>;

            phandle = <0x00000009>;

        };

        cpu@1 {

            device_type = "cpu";

            compatible = "arm,cortex-a7";

            reg = <0x00000f01>;

            clock-frequency = <0x2faf0800>;

            linux,phandle = <0x0000000a>;

            phandle = <0x0000000a>;

        };

        cpu@2 {

            device_type = "cpu";

            compatible = "arm,cortex-a7";

            reg = <0x00000f02>;

            clock-frequency = <0x2faf0800>;

            linux,phandle = <0x0000000b>;

            phandle = <0x0000000b>;

        };

        cpu@3 {

            device_type = "cpu";

            compatible = "arm,cortex-a7";

            reg = <0x00000f03>;

            clock-frequency = <0x2faf0800>;

            linux,phandle = <0x0000000c>;

            phandle = <0x0000000c>;

        };

    };

    __overrides__ {

        arm_freq = <0x00000009 0x6e63793a 0x66726571 0x636c6f63 0x30000000 0x75656e63 0x00000059 0x00000003 0x73746174 0x0000004f 0x00000003 0x73746174 0x000001b8 0x65717565 0x00000016 0x6b2d6672 0x00000003 0x6770696f 0x000001e1 0x00000003 0x6c696e75 0x69676765>;

        i2s = [00 00 00 0d 73 74 61 74 75 73 00];

        spi = [00 00 00 0e 73 74 61 74 75 73 00];

        i2c0 = [00 00 00 0f 73 74 61 74 75 73 00];

        i2c1 = [00 00 00 10 73 74 61 74 75 73 00];

        i2c0_baudrate = [00 00 00 0f 63 6c 6f 63 6b 2d 66 72 65 71 75 65 6e 63 79 3a 30 00];

        i2c1_baudrate = [00 00 00 10 63 6c 6f 63 6b 2d 66 72 65 71 75 65 6e 63 79 3a 30 00];

        act_led_gpio = <0x00000011 0x0000000c 0x733a3800>;

        act_led_activelow = <0x00000011 0x0000001a 0x782c6465>;

        act_led_trigger = [00 00 00 11 6c 69 6e 75 78 2c 64 65 66 61 75 6c 74 2d 74 72 69 67 67 65 72 00];

        pwr_led_gpio = <0x00000012 0x0000000c 0x733a3800>;

        pwr_led_activelow = <0x00000012 0x0000001a 0x782c6465>;

        pwr_led_trigger = [00 00 00 12 6c 69 6e 75 78 2c 64 65 66 61 75 6c 74 2d 74 72 69 67 67 65 72 00];

    };

    sound {

        linux,phandle = <0x00000016>;

        phandle = <0x00000016>;

    };

    __symbols__ {

        soc = "/soc";

        intc = "/soc/interrupt-controller";

        gpio = "/soc/gpio";

        spi0_pins = "/soc/gpio/spi0_pins";

        i2c0_pins = "/soc/gpio/i2c0";

        i2c1_pins = "/soc/gpio/i2c1";

        i2s_pins = "/soc/gpio/i2s";

        i2s = "/soc/i2s@7e203000";

        spi0 = "/soc/spi@7e204000";

        i2c0 = "/soc/i2c@7e205000";

        i2c1 = "/soc/i2c@7e804000";

        leds = "/soc/leds";

        act_led = "/soc/leds/act";

        pwr_led = "/soc/leds/pwr";

        clk_i2c = "/clocks/i2c";

        clk_spi = "/clocks/clock@2";

        cpus = "/cpus";

        v7_cpu0 = "/cpus/cpu@0";

        v7_cpu1 = "/cpus/cpu@1";

        v7_cpu2 = "/cpus/cpu@2";

        v7_cpu3 = "/cpus/cpu@3";

        sound = "/sound";

    };

};

overlays$ fdtdump lirc-rpi-overlay.dtb

/dts-v1/;

// magic:               0xd00dfeed

// totalsize:           0x594 (1428)

// off_dt_struct:       0x38

// off_dt_strings:      0x4b4

// off_mem_rsvmap:      0x28

// version:             17

// last_comp_version:   16

// boot_cpuid_phys:     0x0

// size_dt_strings:     0xe0

// size_dt_struct:      0x47c

/ {

    compatible = "brcm,bcm2708";

    fragment@0 {

        target-path = "/";

        __overlay__ {

            lirc_rpi {

                compatible = "rpi,lirc-rpi";

                pinctrl-names = "default";

                pinctrl-0 = <0x00000001>;

                status = "okay";

                rpi,sense = <0xffffffff>;

                rpi,softcarrier = <0x00000001>;

                rpi,invert = <0x00000000>;

                rpi,debug = <0x00000000>;

                linux,phandle = <0x00000002>;

                phandle = <0x00000002>;

            };

        };

    };

    fragment@1 {

        target = <0xdeadbeef>;

        __overlay__ {

            lirc_pins {

                brcm,pins = <0x00000011 0x00000084>;

                brcm,function = <0x00000001 0x00000092>;

                brcm,pull = <0x00000000 0x00000065>;

                linux,phandle = <0x00000001>;

                phandle = <0x00000001>;

            };

        };

    };

    __overrides__ {

        gpio_out_pin = <0x00000001 0x00000003 0x6272636d 0x00000010>;

        gpio_in_pin = <0x00000001 0x00000003 0x6272636d 0x00000010>;

        gpio_in_pull = <0x00000001 0x00000003 0x7270692c 0x00000016>;

        sense = <0x00000002 0x00000003 0x7270692c 0x30000000>;

        softcarrier = [00 00 00 02 72 70 69 2c 73 6f 66 74 63 61 72 72 69 65 72 3a 30 00];

        invert = [00 00 00 02 72 70 69 2c 69 6e 76 65 72 74 3a 30 00];

        debug = <0x00000002 0x00000002 0x735f5f00 0x2f667261>;

    };

    __symbols__ {

        lirc_rpi = "/fragment@0/__overlay__/lirc_rpi";

        lirc_pins = "/fragment@1/__overlay__/lirc_pins";

    };

    __fixups__ {

        gpio = "/fragment@1:target:0";

    };

    __local_fixups__ {

        fixup = "/fragment@0/__overlay__/lirc_rpi:pinctrl-0:0", "/__overrides__:gpio_out_pin:0", "/__overrides__:gpio_in_pin:0", "/__overrides__:gpio_in_pull:0", "/__overrides__:sense:0", "/__overrides__:softcarrier:0", "/__overrides__:invert:0", "/__overrides__:debug:0";

    };

}; 

CONFIG_BLK_DEV_INITRD=y

CONFIG_INITRAMFS_SOURCE="../target_fs"

[링크 : https://github.com/raspberrypi/linux/blob/rpi-patches/arch/arm/configs/bcmrpi_emergency_defconfig] 

[    2.465182] RAMDISK: lzma image found at block 0

[    2.469881] RAMDISK: lzma decompressor not configured!

[    2.475016] Invalid ramdisk decompression routine.  Select appropriate config option.

[    2.482897] Kernel panic - not syncing: Could not decompress initial ramdisk image.

-*- Kernel->user space relay support (formerly relayfs)           

[*] Initial RAM filesystem and RAM disk (initramfs/initrd) support

()    Initramfs source file(s)                                    

[*]   Support initial ramdisks compressed using gzip              

[ ]   Support initial ramdisks compressed using bzip2             

[ ]   Support initial ramdisks compressed using LZMA              

[ ]   Support initial ramdisks compressed using XZ                

[ ]   Support initial ramdisks compressed using LZO               

[ ]   Support initial ramdisks compressed using LZ4               

[ ] Optimize for size                                             

-*- Configure standard kernel features (expert users)  --->       

[*] Embedded system                                               

    Kernel Performance Events And Counters  --->                  

[*] Enable VM event counters for /proc/vmstat                     

[*] Enable SLUB debugging support                                 

2015/04/14 - [개소리 왈왈/라즈베리 파이 2] - 라즈베리 파이 2 커널 바꿔치기.. 실패 ㅠㅠ

$ file *

COPYING.linux:          Pascal source, ASCII text

LICENCE.broadcom:       ASCII text

a:                      directory

b:                      directory

bcm2708-rpi-b-plus.dtb: data

bcm2708-rpi-b.dtb:      data

bootcode.bin:           data

cmdline.txt:            ASCII text

config.txt:             ASCII text

fixup.dat:              data

fixup_cd.dat:           data

fixup_x.dat:            data

initrd.img:             LZMA compressed data, streamed

kernel.img:             Linux kernel ARM boot executable zImage (little-endian)

kernel7.img:            Linux kernel ARM boot executable zImage (little-endian)

overlays:               directory

snappy-system.txt:      ASCII text, with very long lines

start.elf:              ELF 32-bit LSB  executable, version 1 (SYSV), statically linked, stripped

start_cd.elf:           ELF 32-bit LSB  executable, version 1 (SYSV), statically linked, stripped

start_x.elf:            ELF 32-bit LSB  executable, version 1 (SYSV), statically linked, stripped

uEnv.txt:               empty

2015/04/14 - [개소리 왈왈/라즈베리 파이 2] - 라즈베리 파이 2 - RootFS in linux 

Uncompressing Linux... done, booting the kernel.

[    0.000000] Booting Linux on physical CPU 0xf00

[    0.000000] Initializing cgroup subsys cpu

[    0.000000] Initializing cgroup subsys cpuacct

[    0.000000] Linux version 3.18.10-v7+ (minimonk@devdesk) (gcc version 4.8.3 20140106 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.01 - Linaro GCC 2013.11) ) #4 SMP PREEMPT Tue Apr 28 21:20:55 KST 2015

[    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d

[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

[    0.000000] Machine: BCM2709

[    0.000000] cma: Reserved 8 MiB at 0x39800000

[    0.000000] Memory policy: Data cache writealloc

[    0.000000] [bcm2709_smp_init_cpus] enter (8620->f3003010)

[    0.000000] [bcm2709_smp_init_cpus] ncores=4

[    0.000000] PERCPU: Embedded 10 pages/cpu @ba369000 s11456 r8192 d21312 u40960

[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 239776

[    0.000000] Kernel command line: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2709.boardrev=0xa21041 bcm2709.serial=0xa37ce24e smsc95xx.macaddr=B8:27:EB:7C:E2:4E bcm2708_fb.fbswap=1 bcm2709.disk_led_gpio=47 bcm2709.disk_led_active_low=0 sdhci-bcm2708.emmc_clock_freq=250000000 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000  dwc_otg.lpm_enable=0 console=ttyAMA0,115200 root=/dev/disk/by-label/system-a init=/lib/systemd/systemd ro panic=-1 fixrtc elevator=deadline rootwait

[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)

[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

[    0.000000] Memory: 928208K/966656K available (5717K kernel code, 397K rwdata, 1748K rodata, 388K init, 763K bss, 38448K reserved)

[    0.000000] Virtual kernel memory layout:

[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)

[    0.000000]     fixmap  : 0xffc00000 - 0xffe00000   (2048 kB)

[    0.000000]     vmalloc : 0xbb800000 - 0xff000000   (1080 MB)

[    0.000000]     lowmem  : 0x80000000 - 0xbb000000   ( 944 MB)

[    0.000000]     modules : 0x7f000000 - 0x80000000   (  16 MB)

[    0.000000]       .text : 0x80008000 - 0x8075287c   (7467 kB)

[    0.000000]       .init : 0x80753000 - 0x807b4000   ( 388 kB)

[    0.000000]       .data : 0x807b4000 - 0x8081747c   ( 398 kB)

[    0.000000]        .bss : 0x8081747c - 0x808d61d4   ( 764 kB)

[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1

[    0.000000] Preemptible hierarchical RCU implementation.

[    0.000000] NR_IRQS:608

[    0.000000] Architected cp15 timer(s) running at 19.20MHz (virt).

[    0.000014] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 3579139424256ns

[    0.000036] Switching to timer-based delay loop, resolution 52ns

[    0.000313] Console: colour dummy device 80x30

[    0.000349] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)

[    0.000377] pid_max: default: 32768 minimum: 301

[    0.000780] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)

[    0.000803] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)

[    0.002046] Initializing cgroup subsys memory

[    0.002097] Initializing cgroup subsys devices

[    0.002126] Initializing cgroup subsys freezer

[    0.002152] Initializing cgroup subsys net_cls

[    0.002175] Initializing cgroup subsys blkio

[    0.002278] CPU: Testing write buffer coherency: ok

[    0.002361] ftrace: allocating 19590 entries in 58 pages

[    0.050685] missing device node for CPU 0

[    0.050723] missing device node for CPU 1

[    0.050737] missing device node for CPU 2

[    0.050747] missing device node for CPU 3

[    0.050769] CPU0: thread -1, cpu 0, socket 15, mpidr 80000f00

[    0.050784] [bcm2709_smp_prepare_cpus] enter

[    0.050914] Setting up static identity map for 0x527b38 - 0x527b6c

[    0.110660] [bcm2709_boot_secondary] cpu:1 started (0) 18

[    0.110951] CPU1: Booted secondary processor

[    0.110960] [bcm2709_secondary_init] enter cpu:1

[    0.111014] CPU1: thread -1, cpu 1, socket 15, mpidr 80000f01

[    0.130645] [bcm2709_boot_secondary] cpu:2 started (0) 18

[    0.130881] CPU2: Booted secondary processor

[    0.130889] [bcm2709_secondary_init] enter cpu:2

[    0.130922] CPU2: thread -1, cpu 2, socket 15, mpidr 80000f02

[    0.150692] [bcm2709_boot_secondary] cpu:3 started (0) 16

[    0.150917] CPU3: Booted secondary processor

[    0.150924] [bcm2709_secondary_init] enter cpu:3

[    0.150955] CPU3: thread -1, cpu 3, socket 15, mpidr 80000f03

[    0.151048] Brought up 4 CPUs

[    0.151080] SMP: Total of 4 processors activated (153.60 BogoMIPS).

[    0.151091] CPU: All CPU(s) started in SVC mode.

[    0.152103] devtmpfs: initialized

[    0.176863] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5

[    0.178817] pinctrl core: initialized pinctrl subsystem

[    0.179596] NET: Registered protocol family 16

[    0.185269] DMA: preallocated 4096 KiB pool for atomic coherent allocations

[    0.186386] bcm2709.uart_clock = 3000000

[    0.188734] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.

[    0.188751] hw-breakpoint: maximum watchpoint size is 8 bytes.

[    0.188783] mailbox: Broadcom VideoCore Mailbox driver

[    0.188890] bcm2708_vcio: mailbox at f300b880

[    0.189253] bcm_power: Broadcom power driver

[    0.189270] bcm_power_open() -> 0

[    0.189282] bcm_power_request(0, 8)

[    0.689968] bcm_mailbox_read -> 00000080, 0

[    0.689981] bcm_power_request -> 0

[    0.690104] Serial: AMBA PL011 UART driver

[    0.690236] dev:f1: ttyAMA0 at MMIO 0x3f201000 (irq = 83, base_baud = 0) is a PL011 rev3

[    1.195351] console [ttyAMA0] enabled

[    1.263851] SCSI subsystem initialized

[    1.267829] usbcore: registered new interface driver usbfs

[    1.273468] usbcore: registered new interface driver hub

[    1.278913] usbcore: registered new device driver usb

[    1.285800] Switched to clocksource arch_sys_counter

[    1.321396] FS-Cache: Loaded

[    1.324590] CacheFiles: Loaded

[    1.338877] NET: Registered protocol family 2

[    1.344505] TCP established hash table entries: 8192 (order: 3, 32768 bytes)

[    1.351730] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)

[    1.358404] TCP: Hash tables configured (established 8192 bind 8192)

[    1.364854] TCP: reno registered

[    1.368114] UDP hash table entries: 512 (order: 2, 16384 bytes)

[    1.374078] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)

[    1.380781] NET: Registered protocol family 1

[    1.385842] RPC: Registered named UNIX socket transport module.

[    1.391762] RPC: Registered udp transport module.

[    1.396505] RPC: Registered tcp transport module.

[    1.401204] RPC: Registered tcp NFSv4.1 backchannel transport module.

[    1.408004] Trying to unpack rootfs image as initramfs...

[   14.839907] Freeing initrd memory: 12660K (ba393000 - baff0000) 

gpio -g write 16 1

dtoverlay=lirc-rpi,gpio_out_pin=16,gpio_in_pin=17,debug=on

dtoverlay=lirc-rpi,gpio_out_pin=25,gpio_in_pin=18

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=99085] 

File:   lirc-rpi-overlay.dtb

Info:   Configures lirc-rpi (Linux Infrared Remote Control for Raspberry Pi)

        Consult the module documentation for more details.

Load:   dtoverlay=lirc-rpi,<param>=<val>,...

Params: gpio_out_pin             GPIO pin for output (default "17")

        gpio_in_pin              GPIO pin for input (default "18")

        gpio_in_pull             Pull up/down/off on the input pin

                                 (default "down")

        sense                    Override the IR receive auto-detection logic:

                                   "1" = force active high

                                   "0" = force active low

                                   "-1" = use auto-detection

                                 (default "-1")

        softcarrier              Turn the software carrier "on" or "off"

                                 (default "on")

        invert                   "on" = invert the output pin (default "off")

        debug                    "on" = enable additional debug messages

                                 (default "off")

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=97314]

# Uncomment this to enable the lirc-rpi module

#dtoverlay=lirc-rpi

# Uncomment this to override the defaults for the lirc-rpi module

#dtparam=gpio_out_pin=16

#dtparam=gpio_in_pin=17

#dtparam=gpio_in_pull=down

[링크 : https://www.raspberrypi.org/documentation/configuration/device-tree.md] 

dtoverlay=lirc-rpi

dtparam=gpio_out_pin=16

dtparam=gpio_in_pin=17

dtparam=gpio_in_pull=down

or appended to the overlay line like this:

dtoverlay=lirc-rpi:gpio_out_pin=16,gpio_in_pin=17,gpio_in_pull=down 

[링크 : https://www.raspberrypi.org/documentation/configuration/device-tree.md]