まず、何も接続していない状態で i2c2detect コマンドを使って I2C2 バスの状態を見ると、このようにタイムアウトエラーになる。 # i2cdetect -r -y 3 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: [ 98.424914] omap_i2c omap_i2c.3: controller timed out -- [ 99.424914] omap_i2c omap_i2c.3: controller timed out -- [ 100.424911] omap_i2c omap_i2c.3: controller timed out -- [ 101.424916] omap_i2c omap_i2c.3: controller timed out -- [ 102.424908] omap_i2c omap_i2c.3: contr