ADC_TM_GEN2_TM_CH_SEL
val &= ~ADC_TM_GEN2_TM_CH_SEL;
val |= FIELD_PREP(ADC_TM_GEN2_TM_CH_SEL, channel->channel);
buf[1] &= ~ADC_TM_GEN2_TM_CH_SEL;
buf[1] |= FIELD_PREP(ADC_TM_GEN2_TM_CH_SEL, channel->channel);