The worst is when you have lines in a similar pattern across your formatter's line length boundary and you end up with

  setup_spi(&adc, mode=SPI_01, rate=15, cs_control=CS_MUXED, cs=0x01);
  setup_spi(&eeprom,
      mode=SPI_10,
      rate=13,
      cs_control=CS_MUXED,
      cs=0x02);
  setup_spi(&mram, mode=SPI_10, rate=50, cs_control=CS_DIRECT, cs=0x08);