[v3] spi: cadence-qspi: add Mobileye EyeQ5 support

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

Posted by Théo Lebrun 1 year, 10 months ago

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 <theo.lebrun@bootlin.com>
---
 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

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

Posted by Rob Herring 1 year, 10 months ago

On Wed, 10 Apr 2024 11:29:06 +0200, Théo 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: Théo Lebrun <theo.lebrun@bootlin.com>
> ---
>  Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml | 1 -
>  1 file changed, 1 deletion(-)
> 

Acked-by: Rob Herring <robh@kernel.org>