Hi,
thanks your reply.
it seems the g_serial is not loaded;
root@orangepipc2:~# lsmod
Module Size Used by
rc_cec 16384 0
ir_lirc_codec 16384 0
snd_soc_hdmi_codec 16384 1
lirc_dev 20480 1 ir_lirc_codec
dw_hdmi_i2s_audio 16384 0
dw_hdmi_cec 16384 0
snd_soc_simple_card 16384 0
sun8i_codec_analog 28672 1
snd_soc_simple_card_utils 16384 1 snd_soc_simple_card
sun4i_codec 49152 3
sun4i_i2s 20480 2
snd_soc_core 155648 6 sun4i_i2s,sun8i_codec_analog,snd_soc_hdmi_codec,sun4i_codec,snd_soc_simple_card_utils,snd_soc_simple_card
snd_pcm_dmaengine 16384 1 snd_soc_core
sunxi_cir 16384 0
snd_pcm 106496 4 sun4i_i2s,snd_soc_hdmi_codec,snd_soc_core,snd_pcm_dmaengine
sun8i_dw_hdmi 16384 0
snd_timer 32768 1 snd_pcm
dw_hdmi 28672 2 dw_hdmi_i2s_audio,sun8i_dw_hdmi
cec 53248 2 dw_hdmi_cec,dw_hdmi
rc_core 32768 7 rc_cec,lirc_dev,ir_lirc_codec,sunxi_cir,cec
sun4i_gpadc_iio 16384 0
sun8i_mixer 16384 0
sun4i_tcon 28672 1 sun8i_dw_hdmi
iio_hwmon 16384 0
sun4i_drm 16384 0
industrialio 65536 2 sun4i_gpadc_iio,iio_hwmon
zram 28672 5
sy8106a_regulator 16384 1
sunxi 20480 0
musb_hdrc 98304 1 sunxi
i tried reboot the board with my USB connected to board microUSB OTG port, but still no g_serial loaded.
how can i configure it to load g_serial?