mcp3564_write_8bits
ret = mcp3564_write_8bits(adc, MCP3564_LOCK_REG, MCP3564_LOCK_WRITE_ACCESS_PASSWORD);
ret = mcp3564_write_8bits(adc, MCP3564_IRQ_REG, 0x03);
ret = mcp3564_write_8bits(adc, MCP3564_MUX_REG, MCP3564_MUX_SET(MCP3564_CH0, MCP3564_CH1));
ret = mcp3564_write_8bits(adc, MCP3564_IRQ_REG,
ret = mcp3564_write_8bits(adc, MCP3564_CONFIG3_REG, tmp_reg);
ret = mcp3564_write_8bits(adc, MCP3564_CONFIG2_REG, tmp_reg);
ret = mcp3564_write_8bits(adc, MCP3564_CONFIG1_REG, tmp_reg);
ret = mcp3564_write_8bits(adc, MCP3564_CONFIG0_REG, tmp_reg);
return mcp3564_write_8bits(adc, reg, tmp);
ret = mcp3564_write_8bits(adc, MCP3564_MUX_REG, channel->address);