[PATCH v2 1/3] mtd: spinand: gigadevice: Only one dummy byte in QUADIO

[Hauke Mehrtens]

On 9/1/20 7:22 AM, Chuanhong Guo wrote:
> Hi!
> 
> On Fri, Aug 21, 2020 at 12:53 AM Hauke Mehrtens <hauke at hauke-m.de> wrote:
>>
>> The datasheet only lists one dummy byte in the 0xEH operation for the
>> following chips:
>> * GD5F1GQ4xExxG
>> * GD5F1GQ4xFxxG
>> * GD5F1GQ4UAYIG
>> * GD5F4GQ4UAYIG
>>
>> Fixes: c93c613214ac ("mtd: spinand: add support for GigaDevice GD5FxGQ4xA")
>> Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
> 
> I made myself a QSPI-capable device and verified that QSPI works on
> GD5F1GQ4UAYIG
> after this and the QE bit patch.
> Thanks for the fixes!
> 
> Tested-by: Chuanhong Guo <gch981213 at gmail.com>
> 

Thank you for testing this.

Then I am sure the QSPI mode of my SPI controller driver is broken. The
QSPI support for this controller is anyway not in Linux mainline.

Hauke

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