ブート中のGPIO設定変更

2020年10月3日 Raspberry Pi

詳細はOpenPLCハット作成を参照だが、
GPIO14とGPIO15は、デフォルトではUART TXD, RXDに割り付けられており、
ブート中TXDはOutput w/ Highドライブ、RXDはInput w/内蔵プルアップとなり、
Raspberry Pi OS起動後に両方ともInput w/内蔵プルダウンとなる。

RXD側は外部プルダウン抵抗で対応できるけど、
TXD側は対応できないため、ブート中のGPIO設定を変更したい。

ラズパイ公式に記載されてるdt-blob.binを作成する方法を試してみる。

Contents

ファームウェアバージョン確認

2014年7月15日以降のファームウェアでこの方法、user-provided Device Tree blob fileでのデフォルトのピン設定、が有効とのこと。

$ vcgencmd version
Aug 24 2020 18:52:38
Copyright (c) 2012 Broadcom
version 8d19c1935e67d8ac2fe87c639d4e8b8ef250813b (clean) (release) (start)

$ vcgencmd version

Aug 24 2020 18:52:38

version 8d19c1935e67d8ac2fe87c639d4e8b8ef250813b (clean) (release) (start)

2020年8月24日版のファームウェアなので使える。

Device Tree blobファイル作成

GitのExampleファイルを参考に作成する。

このファイルには全てのラズパイモデル分が入ってるため、
自分の使用しているモデルのみ抜き出すことにする。

ラズパイモデル確認

以下のようにコマンドで確認できる。

$ cat /proc/device-tree/model
Raspberry Pi 3 Model B Rev 1.2

1 2	$ cat /proc/device-tree/model Raspberry Pi 3 Model B Rev 1.2

Pi 3 Model B rev 1.2なので、pins_3b2のみをコピーして作成する。

dtsファイル作成

dt-blob.dtsファイルにGitのExampleファイルの内容をコピーしていく。

修正するのはpin@p14とpin@p15のみ。
GPIO以外のピン情報はラズパイ公式の回路図には記載されていないのでわからない。公開予定もない模様。

Exampleファイル：

pin@p14 { function = "uart0";  termination = "no_pulling"; drive_strength_mA = &lt; 8 >; }; // TX uart0
pin@p15 { function = "uart0";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // RX uart0

1 2	pin@p14 { function = "uart0"; termination = "no_pulling"; drive_strength_mA = < 8 >; }; // TX uart0 pin@p15 { function = "uart0"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // RX uart0

これをコメントアウトすべきか、function=inputまたはoutputにするか迷う。
Exampleファイルにはpin@defaultが以下のように設定されているのでコメントアウトで良い気がする。

pin@default {
   polarity = "active_high";
   termination = "pull_down";
   startup_state = "inactive";
   function = "input";
}; // pin

pin@default {

polarity = "active_high";

termination = "pull_down";

startup_state = "inactive";

function = "input";

}; // pin

まずはコメントアウトしてdt-blob.binを作成して確認してみる。
以下が全文。

/dts-v1/;

/ {
   videocore {
      pins_3b2 { // Pi 3 Model B rev 1.2
         pin_config {
            pin@default {
               polarity = "active_high";
               termination = "pull_down";
               startup_state = "inactive";
               function = "input";
            }; // pin
            //pin@p14 { function = "uart0";  termination = "no_pulling"; drive_strength_mA = &lt; 8 >; }; // TX uart0
            //pin@p15 { function = "uart0";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // RX uart0
            pin@p34 { function = "input";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; };
            pin@p35 { function = "input";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; };
            pin@p36 { function = "input";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; };
            pin@p37 { function = "input";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; };
            pin@p38 { function = "input";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; };
            pin@p39 { function = "input";  termination = "pull_up";    drive_strength_mA = &lt; 8 >; };
            pin@p40 { function = "pwm";    termination = "no_pulling"; drive_strength_mA = &lt; 16 >; }; // Right audio
            pin@p41 { function = "pwm";    termination = "no_pulling"; drive_strength_mA = &lt; 16 >; }; // Left audio
            pin@p42 { function = "gp_clk"; termination = "pull_down"; }; // ETH_CLK - Ethernet 25MHz output
            pin@p43 { function = "gp_clk"; termination = "pull_down"; }; // WIFI_CLK - Wifi 32kHz output
            pin@p44 { function = "input";   termination = "pull_up";    }; // I2C 0 SDA
            pin@p45 { function = "input";   termination = "pull_up";    }; // I2C 0 SCL
            pin@p46 { function = "input";   termination = "pull_up";    }; // SMPS_SCL
            pin@p47 { function = "input";   termination = "pull_up";    }; // SMPS_SDA
            pin@p48 { function = "sdcard"; termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // SD CLK
            pin@p49 { function = "sdcard"; termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // SD CMD
            pin@p50 { function = "sdcard"; termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // SD D0
            pin@p51 { function = "sdcard"; termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // SD D1
            pin@p52 { function = "sdcard"; termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // SD D2
            pin@p53 { function = "sdcard"; termination = "pull_up";    drive_strength_mA = &lt; 8 >; }; // SD D3
            pin@p128 { function = "output"; termination = "no_pulling"; }; // BT_ON
            pin@p129 { function = "output"; termination = "no_pulling"; }; // WL_ON
            pin@p130 { function = "output"; termination = "no_pulling"; }; // ACT_LED
            pin@p131 { function = "output"; termination = "no_pulling"; startup_state = "active"; }; // LAN_RUN
            pin@p132 { function = "input";  termination = "no_pulling"; polarity = "active_low"; }; // Hotplug
            pin@p133 { function = "output"; termination = "no_pulling"; }; // Camera shutdown
            pin@p134 { function = "output"; termination = "no_pulling"; }; // Camera LED
            pin@p135 { function = "input";  termination = "no_pulling"; polarity = "active_low"; }; // Power low
         }; // pin_config

         pin_defines {
            pin_define@HDMI_CONTROL_ATTACHED {
               type = "external";
               number = &lt;4>;
            };
            pin_define@NUM_CAMERAS {
               type = "internal";
               number = &lt;1>;
            };
            pin_define@CAMERA_0_I2C_PORT {
               type = "internal";
               number = &lt;0>;
            };
            pin_define@CAMERA_0_SDA_PIN {
               type = "internal";
               number = &lt;44>;
            };
            pin_define@CAMERA_0_SCL_PIN {
               type = "internal";
               number = &lt;45>;
            };
            pin_define@CAMERA_0_SHUTDOWN {
               type = "external";
               number = &lt;5>;
            };
            pin_define@CAMERA_0_UNICAM_PORT {
               type = "internal";
               number = &lt;1>;
            };
            pin_define@CAMERA_0_LED {
               type = "external";
               number = &lt;6>;
            };
            pin_define@FLASH_0_ENABLE {
               type = "absent";
            };
            pin_define@FLASH_0_INDICATOR {
               type = "absent";
            };
            pin_define@FLASH_1_ENABLE {
               type = "absent";
            };
            pin_define@FLASH_1_INDICATOR {
               type = "absent";
            };
            pin_define@POWER_LOW {
               type = "external";
               number = &lt;7>;
            };
            pin_define@LEDS_DISK_ACTIVITY {
               type = "external";
               number = &lt;2>;
            };
            pin_define@LAN_RUN {
               type = "external";
               number = &lt;3>;
            };
            pin_define@LAN_RUN_BOOT {
               type = "internal";
               number = &lt;29>;
            };
            pin_define@BT_ON {
               type = "external";
               number = &lt;0>;
            };
            pin_define@WL_ON {
               type = "external";
               number = &lt;1>;
            };
            pin_define@SMPS_SDA {
               type = "internal";
               number = &lt;46>;
            };
            pin_define@SMPS_SCL {
               type = "internal";
               number = &lt;47>;
            };
            pin_define@ETH_CLK {
               type = "internal";
               number = &lt;42>;
            };
            pin_define@WL_LPO_CLK {
               type = "internal";
               number = &lt;43>;
            };
            pin_define@USB_LIMIT_1A2 {
               type = "absent";
            };
            pin_define@SIO_1V8_SEL {
               type = "absent";
            };
            pin_define@PWML {
               type = "internal";
               number = &lt;41>;
            };
            pin_define@PWMR {
               type = "internal";
               number = &lt;40>;
            };
            pin_define@SAFE_MODE {
               type = "absent";
            };
            pin_define@SD_CARD_DETECT {
               type = "absent";
            };
            pin_define@ID_SDA {
               type = "internal";
               number = &lt;0>;
            };
            pin_define@ID_SCL {
               type = "internal";
               number = &lt;1>;
            };
            pin_define@DISPLAY_I2C_PORT {
               type = "internal";
               number = &lt;0>;
            };
            pin_define@DISPLAY_SDA {
               type = "internal";
               number = &lt;44>;
            };
            pin_define@DISPLAY_SCL {
               type = "internal";
               number = &lt;45>;
            };
         }; // pin_defines
      }; // pins
   };
};

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/dts-v1/;

/ {

videocore {

pins_3b2 { // Pi 3 Model B rev 1.2

pin_config {

pin@default {

polarity = "active_high";

termination = "pull_down";

startup_state = "inactive";

function = "input";

}; // pin

//pin@p14 { function = "uart0"; termination = "no_pulling"; drive_strength_mA = < 8 >; }; // TX uart0

//pin@p15 { function = "uart0"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // RX uart0

pin@p34 { function = "input"; termination = "pull_up"; drive_strength_mA = < 8 >; };

pin@p35 { function = "input"; termination = "pull_up"; drive_strength_mA = < 8 >; };

pin@p36 { function = "input"; termination = "pull_up"; drive_strength_mA = < 8 >; };

pin@p37 { function = "input"; termination = "pull_up"; drive_strength_mA = < 8 >; };

pin@p38 { function = "input"; termination = "pull_up"; drive_strength_mA = < 8 >; };

pin@p39 { function = "input"; termination = "pull_up"; drive_strength_mA = < 8 >; };

pin@p40 { function = "pwm"; termination = "no_pulling"; drive_strength_mA = < 16 >; }; // Right audio

pin@p41 { function = "pwm"; termination = "no_pulling"; drive_strength_mA = < 16 >; }; // Left audio

pin@p42 { function = "gp_clk"; termination = "pull_down"; }; // ETH_CLK - Ethernet 25MHz output

pin@p43 { function = "gp_clk"; termination = "pull_down"; }; // WIFI_CLK - Wifi 32kHz output

pin@p44 { function = "input"; termination = "pull_up"; }; // I2C 0 SDA

pin@p45 { function = "input"; termination = "pull_up"; }; // I2C 0 SCL

pin@p46 { function = "input"; termination = "pull_up"; }; // SMPS_SCL

pin@p47 { function = "input"; termination = "pull_up"; }; // SMPS_SDA

pin@p48 { function = "sdcard"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // SD CLK

pin@p49 { function = "sdcard"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // SD CMD

pin@p50 { function = "sdcard"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // SD D0

pin@p51 { function = "sdcard"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // SD D1

pin@p52 { function = "sdcard"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // SD D2

pin@p53 { function = "sdcard"; termination = "pull_up"; drive_strength_mA = < 8 >; }; // SD D3

pin@p128 { function = "output"; termination = "no_pulling"; }; // BT_ON

pin@p129 { function = "output"; termination = "no_pulling"; }; // WL_ON

pin@p130 { function = "output"; termination = "no_pulling"; }; // ACT_LED

pin@p131 { function = "output"; termination = "no_pulling"; startup_state = "active"; }; // LAN_RUN

pin@p132 { function = "input"; termination = "no_pulling"; polarity = "active_low"; }; // Hotplug

pin@p133 { function = "output"; termination = "no_pulling"; }; // Camera shutdown

pin@p134 { function = "output"; termination = "no_pulling"; }; // Camera LED

pin@p135 { function = "input"; termination = "no_pulling"; polarity = "active_low"; }; // Power low

}; // pin_config

pin_defines {

pin_define@HDMI_CONTROL_ATTACHED {

type = "external";

number = <4>;

};

pin_define@NUM_CAMERAS {

type = "internal";

number = <1>;

};

pin_define@CAMERA_0_I2C_PORT {

type = "internal";

number = <0>;

};

pin_define@CAMERA_0_SDA_PIN {

type = "internal";

number = <44>;

};

pin_define@CAMERA_0_SCL_PIN {

type = "internal";

number = <45>;

};

pin_define@CAMERA_0_SHUTDOWN {

type = "external";

number = <5>;

};

pin_define@CAMERA_0_UNICAM_PORT {

type = "internal";

number = <1>;

};

pin_define@CAMERA_0_LED {

type = "external";

number = <6>;

};

pin_define@FLASH_0_ENABLE {

type = "absent";

};

pin_define@FLASH_0_INDICATOR {

type = "absent";

};

pin_define@FLASH_1_ENABLE {

type = "absent";

};

pin_define@FLASH_1_INDICATOR {

type = "absent";

};

pin_define@POWER_LOW {

type = "external";

number = <7>;

};

pin_define@LEDS_DISK_ACTIVITY {

type = "external";

number = <2>;

};

pin_define@LAN_RUN {

type = "external";

number = <3>;

};

pin_define@LAN_RUN_BOOT {

type = "internal";

number = <29>;

};

pin_define@BT_ON {

type = "external";

number = <0>;

};

pin_define@WL_ON {

type = "external";

number = <1>;

};

pin_define@SMPS_SDA {

type = "internal";

number = <46>;

};

pin_define@SMPS_SCL {

type = "internal";

number = <47>;

};

pin_define@ETH_CLK {

type = "internal";

number = <42>;

};

pin_define@WL_LPO_CLK {

type = "internal";

number = <43>;

};

pin_define@USB_LIMIT_1A2 {

type = "absent";

};

pin_define@SIO_1V8_SEL {

type = "absent";

};

pin_define@PWML {

type = "internal";

number = <41>;

};

pin_define@PWMR {

type = "internal";

number = <40>;

};

pin_define@SAFE_MODE {

type = "absent";

};

pin_define@SD_CARD_DETECT {

type = "absent";

};

pin_define@ID_SDA {

type = "internal";

number = <0>;

};

pin_define@ID_SCL {

type = "internal";

number = <1>;

};

pin_define@DISPLAY_I2C_PORT {

type = "internal";

number = <0>;

};

pin_define@DISPLAY_SDA {

type = "internal";

number = <44>;

};

pin_define@DISPLAY_SCL {

type = "internal";

number = <45>;

};

}; // pin_defines

}; // pins

};

dt-blob.bin作成

dtcコマンドで作成

$ sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob.dts
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@default: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p34: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p35: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p36: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p37: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p38: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p39: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p40: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p41: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p42: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p43: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p44: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p45: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p46: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p47: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p48: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p49: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p50: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p51: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p52: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p53: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p128: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p129: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p130: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p131: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p132: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p133: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p134: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p135: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@HDMI_CONTROL_ATTACHED: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@NUM_CAMERAS: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_I2C_PORT: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_SDA_PIN: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_SCL_PIN: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_SHUTDOWN: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_UNICAM_PORT: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_LED: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_0_ENABLE: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_0_INDICATOR: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_1_ENABLE: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_1_INDICATOR: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@POWER_LOW: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@LEDS_DISK_ACTIVITY: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@LAN_RUN: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@LAN_RUN_BOOT: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@BT_ON: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@WL_ON: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SMPS_SDA: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SMPS_SCL: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@ETH_CLK: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@WL_LPO_CLK: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@USB_LIMIT_1A2: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SIO_1V8_SEL: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@PWML: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@PWMR: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SAFE_MODE: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SD_CARD_DETECT: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@ID_SDA: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@ID_SCL: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@DISPLAY_I2C_PORT: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@DISPLAY_SDA: node has a unit name, but no reg property
/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@DISPLAY_SCL: node has a unit name, but no reg property

$ sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob.dts

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@default: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p34: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p35: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p36: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p37: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p38: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p39: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p40: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p41: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p42: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p43: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p44: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p45: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p46: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p47: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p48: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p49: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p50: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p51: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p52: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p53: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p128: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p129: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p130: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p131: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p132: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p133: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p134: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_config/pin@p135: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@HDMI_CONTROL_ATTACHED: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@NUM_CAMERAS: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_I2C_PORT: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_SDA_PIN: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_SCL_PIN: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_SHUTDOWN: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_UNICAM_PORT: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@CAMERA_0_LED: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_0_ENABLE: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_0_INDICATOR: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_1_ENABLE: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@FLASH_1_INDICATOR: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@POWER_LOW: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@LEDS_DISK_ACTIVITY: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@LAN_RUN: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@LAN_RUN_BOOT: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@BT_ON: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@WL_ON: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SMPS_SDA: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SMPS_SCL: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@ETH_CLK: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@WL_LPO_CLK: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@USB_LIMIT_1A2: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SIO_1V8_SEL: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@PWML: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@PWMR: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SAFE_MODE: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@SD_CARD_DETECT: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@ID_SDA: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@ID_SCL: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@DISPLAY_I2C_PORT: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@DISPLAY_SDA: node has a unit name, but no reg property

/boot/dt-blob.bin: Warning (unit_address_vs_reg): /videocore/pins_3b2/pin_defines/pin_define@DISPLAY_SCL: node has a unit name, but no reg property

すごい数のwarningが出てるけどまずは無視。

リブートして確認。

成功

ブート中にGPIO14がHighになることはなくなった。
正常にOpenPLCも動作しているし問題なさそう。

ブート中のGPIO設定変更

ファームウェアバージョン確認

Device Tree blobファイル作成

ラズパイモデル確認

dtsファイル作成

dt-blob.bin作成

成功

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