SPI: DUAL/QUAD support

[Sourav Poddar]

On Friday 05 July 2013 02:37 PM, yuhang wang wrote:
>>                      if (!quad_mode)
>>                              dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_SNGL,
>>                                              QSPI_SPI_CMD_REG);
>>                      else
>>                              dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_QUAD,
>>                                              QSPI_SPI_CMD_REG);
>>                   .......
>>                  }
> So what do you based on to set variable quad_mode.
Best way should be to check for flash device id and manufacture data. 
Based on which you
can decide whether your flash supports quad bits or not.