MCP3911_REG_STATUSCOM
return mcp3911_update(adc, MCP3911_REG_STATUSCOM, mask, value, 2);
ret = mcp3911_read(adc, MCP3911_REG_STATUSCOM, ®val, 2);
ret = mcp3911_write(adc, MCP3911_REG_STATUSCOM, regval, 2);