MCP3564_CONFIG2_BOOST_CURRENT_MASK
tmp_reg = FIELD_PREP(MCP3564_CONFIG2_BOOST_CURRENT_MASK, MCP3564_BOOST_CURRENT_x1_00);
ret = mcp3564_update_8bits(adc, MCP3564_CONFIG2_REG, MCP3564_CONFIG2_BOOST_CURRENT_MASK,
FIELD_PREP(MCP3564_CONFIG2_BOOST_CURRENT_MASK, mode));