Re: [PATCH] dt-bindings: arm: rockchip: add Radxa ROCK 5C Lite

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On 2024-12-11 08:02, FUKAUMI Naoki wrote:
just FYI,

https://lore.kernel.org/linux-rockchip/?q=e52c

AFAICT, it isn't too late to introduce "rockchip,rk3582". :)

On 12/11/24 15:44, FUKAUMI Naoki wrote:
On 12/11/24 15:36, Dragan Simic wrote:
On 2024-12-11 07:09, FUKAUMI Naoki wrote:
The Radxa ROCK 5C Lite uses a different SoC (RK3582) compared to the
Radxa ROCK 5C (RK3588S2), but the two are compatible from a software
perspective.

Fixes: df4e08a5eed1 ("dt-bindings: arm: rockchip: add Radxa ROCK 5C")
Signed-off-by: FUKAUMI Naoki <naoki@xxxxxxxxx>
---
 Documentation/devicetree/bindings/arm/rockchip.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml
b/Documentation/devicetree/bindings/arm/rockchip.yaml
index 753199a12923..2254ee079094 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.yaml
+++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
@@ -895,7 +895,7 @@ properties:
           - const: radxa,rock-5b
           - const: rockchip,rk3588

-      - description: Radxa ROCK 5C
+      - description: Radxa ROCK 5C/5C Lite
         items:
           - const: radxa,rock-5c
           - const: rockchip,rk3588s

I think it would be better to use "rockchip,rk3582" here, to allow
us to possibly use that information later.  For example, we might
want to be able to recognize RK3582-based boards in U-Boot without
the need to look into the e-fuses at some point, for which purpose
having a clear designator in the DT would fit perfectly.

It may be okay to introduce "rockchip,rk3582", but reading e-fuse
is still required in U-Boot because which unit (cpu coreX, gpu, etc)
is broken cannot be determined without reading e-fuse at run-time.

As a reminder, using "rockchip,rk3582" would also require a small
addition to drivers/irqchip/irq-gic-v3-its.c.




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