From: Chi-Wen Weng <cwweng@nuvoton.com>

The generic SPI controller binding allows GPIO-based chip selects, but
the MA35D1 QSPI driver currently supports only the controller's two
native chip selects.

This series enables GPIO descriptor-based chip-select handling in the
driver and updates the binding so that num-cs can describe the total
number of native and GPIO chip selects.

Patch 1 removes the native hardware limit from the binding's num-cs
property.

Patch 2 enables GPIO chip selects in the driver while retaining the
hardware limit of two native chip selects.

Changes in v3:

* Split the binding and driver changes into a two-patch series.
* Allow num-cs to exceed the two native chip selects when GPIO chip
  selects are present.
* Remove the driver's upper limit of two from num-cs.
* Rename the native chip-select limit for clarity.
* Reject out-of-range native chip-select indices in the setup callback.
* Retain active-high support for GPIO chip selects only.

Changes in v2:

* Enable GPIO descriptor-based chip-select handling in the driver
  instead of disallowing cs-gpios in the binding.
* Set the maximum number of native chip selects to two.
* Reject active-high polarity only for native chip selects.

Chi-Wen Weng (2):
  dt-bindings: spi: nuvoton,ma35d1-qspi: Allow additional GPIO chip
    selects
  spi: ma35d1-qspi: Enable GPIO chip selects

 .../bindings/spi/nuvoton,ma35d1-qspi.yaml     |  1 -
 drivers/spi/spi-ma35d1-qspi.c                 | 32 ++++++++++++++++---
 2 files changed, 28 insertions(+), 5 deletions(-)

-- 
2.25.1

On Mon, Aug 03, 2026 at 03:49:11PM +0800, Chi-Wen Weng wrote:
> From: Chi-Wen Weng <cwweng@nuvoton.com>
> 
> The generic SPI controller binding allows GPIO-based chip selects, but
> the MA35D1 QSPI driver currently supports only the controller's two
> native chip selects.

Please don't send new patches in reply to old patches or serieses, this
makes it harder for both people and tools to understand what is going
on - it can bury things in mailboxes and make it difficult to keep track
of what current patches are, both for the new patches and the old ones.

Mark Brown 於 2026/8/3 下午 08:30 寫道:
> On Mon, Aug 03, 2026 at 03:49:11PM +0800, Chi-Wen Weng wrote:
>> From: Chi-Wen Weng <cwweng@nuvoton.com>
>>
>> The generic SPI controller binding allows GPIO-based chip selects, but
>> the MA35D1 QSPI driver currently supports only the controller's two
>> native chip selects.
> Please don't send new patches in reply to old patches or serieses, this
> makes it harder for both people and tools to understand what is going
> on - it can bury things in mailboxes and make it difficult to keep track
> of what current patches are, both for the new patches and the old ones.

Hi Mark,

Understood. I will send future revisions and new patch series as new 
top-level threads rather than replying to older patches or series.

Sorry for the confusion, and thanks for the clarification.

Best regards,
Chi-Wen