Dear Mark, On Wed, 23 Dec 2015 12:15:12 +0000 Mark Brown wrote:
> On Wed, Dec 23, 2015 at 07:23:38PM +0800, Jisheng Zhang wrote: > > > Currently the spi-dw tmode is fixed to SPI_TMOD_TR if cs_control is NULL, > > but we > > need to set it as SPI_TMOD_EPROMREAD to read nor flash, my solution is to > > add and > > export one functions to set the tmode, then the nor flash driver call it > > before reading and set back to SPI_TMOD_TR after done. > > What does this mean - what is TMOD and why do we need to set it to read > NOR flash? I've no information on this controller... TMOD is one field of DW_SPI_CTRL0. Its available value could be: 0: Transmit and Receive 1: Transmit only 2: Receive only 3: EEPROM Read If the one spi nor flash is connected to the SPI host, so far I can only succeed to read the nor flash content after setting the TMOD field as 3. Thanks, Jisheng -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
