[PATCH v1 1/2] spi: cadence: Add driver for xSPI

[Tom Rini]

On Tue, Oct 14, 2025 at 06:13:53PM +0800, Boon Khai Ng wrote:

> This patch ports the Cadence xSPI controller driver from
> the Linux kernel. The controller supports three operating modes:
> 
> 1. ACMD (Auto Command) mode
>    - Includes PIO and CDMA submodes.
>    - CDMA mode uses linked descriptors for high-performance,
>      low-overhead operation.
>    - PIO mode is suitable for simple, single-command transactions.
> 
> 2. STIG (Software Triggered Instruction Generator) mode
>    - Issues low-level 128-bit instructions to memory.
>    - Uses the Slave DMA interface for data transfers.
> 
> 3. Direct mode
>    - Enables direct data access through the slave interface
>      without commands.
> 
> Currently, only the STIG work mode is enabled. Additional modes will be
> supported in future updates.
> 
> This driver has been ported and functionally verified on the Intel Simics
> platform. It is intended for evaluation and experimental use at this stage.
> 
> Link: https://lore.kernel.org/all/1632038734-23999-1-git-send-email-pthombar@cadence.com/
> 
> Signed-off-by: Boon Khai Ng <boon.khai.ng at altera.com>

What's the status of the related binding in the linux kernel?

-- 
Tom
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