2024-04-10 09:29:28

by Théo Lebrun

Subject: [PATCH v3 3/9] spi: dt-bindings: cdns,qspi-nor: make cdns,fifo-depth optional

Make cdns,fifo-depth devicetree property optional.
Value can be detected at runtime.

Upper SRAMPARTITION register bits are read-only. Procedure to find FIFO
depth is therefore to write 0xFFFFFFFF and read back to get amount of
writeable bits.

Signed-off-by: Théo Lebrun <[email protected]>
---
Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml | 1 -
1 file changed, 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
index 587baf35e4e3..d48ecd6cd5ad 100644
--- a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
+++ b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
@@ -146,7 +146,6 @@ required:
- reg
- interrupts
- clocks
- - cdns,fifo-depth
- cdns,fifo-width
- cdns,trigger-address
- '#address-cells'

--
2.44.0

2024-04-10 20:25:11

by Rob Herring (Arm)

Subject: Re: [PATCH v3 3/9] spi: dt-bindings: cdns,qspi-nor: make cdns,fifo-depth optional

On Wed, 10 Apr 2024 11:29:06 +0200, Th?o Lebrun wrote:
> Make cdns,fifo-depth devicetree property optional.
> Value can be detected at runtime.
>
> Upper SRAMPARTITION register bits are read-only. Procedure to find FIFO
> depth is therefore to write 0xFFFFFFFF and read back to get amount of
> writeable bits.
>
> Signed-off-by: Th?o Lebrun <[email protected]>
> ---
> Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml | 1 -
> 1 file changed, 1 deletion(-)
>

Acked-by: Rob Herring <[email protected]>