[U-Boot] [PATCH] mtd: add altera quadspi driver

Thomas Chou
2015-11-04T02:36:08Z

Hi Marek,

On 2015?11?04? 01:44, Marek Vasut wrote:
> On Tuesday, November 03, 2015 at 02:22:12 PM, Thomas Chou wrote:
>> Add Altera Generic Quad SPI Controller support. The controller
>> converts SPI NOR flash to parallel flash interface. So it is
>> not like other SPI flash, but rather like CFI flash.
>>
>> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
>> ---
>
> You might want to look at https://lwn.net/Articles/636882/ , it is the
> driver for the same hardware, but for Linux. But keep in mind that the
> driver had some difficulties getting in, you might want to check the
> discussions in linux-mtd .
>

I did check and follow the threads for a while since you pointed me
about it in earlier communication. It is v5 last month. But the author
decided to wait for hardware fix on rdid.

Yet I have a different point as I stated in the patch message. It is NOT
a spi-nor since the hardware converted it to parallel interface. It
should be treated more like cfi flash. I think it might be a mistake to
take it as spi-nor. And this might be the hidden cause to prevent the
linux driver getting in. So I wrote it my way.

Best regards,
Thomas