[PATCH v3 0/8] Add the Quadspi driver for vf610-twr

[Huang Shijie]

于 2013年09月11日 19:30, Mark Brown 写道:
> Indeed - what I was wondering was if those opcodes could be requested
> from the flash driver rather than coded in there.  The driver needs to
> write the commands to the device but it's not clear to me if it really
> needs to know the specific commands.
yes. The driver uses the commands to find the _right_ LUT index, and
uses the LUT index to
trigger the controller.

For example, LUT0-LUT3 is used for the READ_STATUS, the driver will
match the
0 index for the NOR's read status operation (0x05), and then the driver
write 0 to the QSPI_IPCR
register to trigger the operation.

thanks
Huang Shijie