[PATCH] dt-bindings: iio: adc: rockchip-saradc: Fix RV1106 compatible

[PATCH] dt-bindings: iio: adc: rockchip-saradc: Fix RV1106 compatible

[Vladislav Leonov]

rockchip,rv1106-saradc was folded into the fallback enum together
with rockchip,rk3576-saradc, falling back to rockchip,rk3588-saradc.
The two IP blocks are not equivalent, though: per the RV1106 TRM v0.3,
chapter 20 (SAR-ADC), RV1106 only has 2 channels at 10-bit resolution,
versus 8 channels at 12-bit on RK3588. Documenting it as falling back
to rk3588-saradc allows device trees that would bind against the wrong
channel table and report an incorrect voltage scale.

Remove rockchip,rv1106-saradc from the RK3588 fallback enum and give
it its own standalone compatible entry, matching the dedicated match
table entry added by the driver patch.

Fixes: bdba14f6122c ("dt-bindings: iio: adc: rockchip-saradc: Add RV1106 compatible")
Link: https://lore.kernel.org/all/20260810090826.146758-1-vlad@zlab.su
Signed-off-by: Vladislav Leonov <vlad@zlab.su>
---
 .../devicetree/bindings/iio/adc/rockchip-saradc.yaml         | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
index f0551d665916..dc56855527b8 100644
--- a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
@@ -22,9 +22,7 @@ properties:
       - const: rockchip,rk3562-saradc
       - const: rockchip,rk3588-saradc
       - items:
-          - enum:
-              - rockchip,rk3576-saradc
-              - rockchip,rv1106-saradc
+          - const: rockchip,rk3576-saradc
           - const: rockchip,rk3588-saradc
       - items:
           - enum:
@@ -35,6 +33,7 @@ properties:
               - rockchip,rv1108-saradc
               - rockchip,rv1126-saradc
           - const: rockchip,rk3399-saradc
+      - const: rockchip,rv1106-saradc
 
   reg:
     maxItems: 1
-- 
2.47.3

Re: [PATCH] dt-bindings: iio: adc: rockchip-saradc: Fix RV1106 compatible

[Joshua Crofts]

On Sun, 16 Aug 2026 14:36:36 +0300
Vladislav Leonov <vlad@zlab.su> wrote:

> rockchip,rv1106-saradc was folded into the fallback enum together
> with rockchip,rk3576-saradc, falling back to rockchip,rk3588-saradc.
> The two IP blocks are not equivalent, though: per the RV1106 TRM v0.3,
> chapter 20 (SAR-ADC), RV1106 only has 2 channels at 10-bit resolution,
> versus 8 channels at 12-bit on RK3588. Documenting it as falling back
> to rk3588-saradc allows device trees that would bind against the wrong
> channel table and report an incorrect voltage scale.
> 
> Remove rockchip,rv1106-saradc from the RK3588 fallback enum and give
> it its own standalone compatible entry, matching the dedicated match
> table entry added by the driver patch.
> 
> Fixes: bdba14f6122c ("dt-bindings: iio: adc: rockchip-saradc: Add RV1106 compatible")
> Link: https://lore.kernel.org/all/20260810090826.146758-1-vlad@zlab.su
> Signed-off-by: Vladislav Leonov <vlad@zlab.su>
> ---

Looking at the link provided, it seems that there should be a Suggested-by
tag for Jonathan?

Otherwise LGTM

Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>

-- 
Kind regards,
Joshua Crofts

Re: [PATCH] dt-bindings: iio: adc: rockchip-saradc: Fix RV1106 compatible

[Vladislav Leonov]

Hi Joshua,

Sorry, I forgot the Suggested-by tag. Should I send a v2, or can the tag be added when applying the patch?

Regards,
Vladislav

Re: [PATCH] dt-bindings: iio: adc: rockchip-saradc: Fix RV1106 compatible

[Joshua Crofts]

On Wed, 19 Aug 2026 10:59:21 +0300
Vladislav Leonov <vlad@zlab.su> wrote:

> Hi Joshua,
> 
> Sorry, I forgot the Suggested-by tag. Should I send a v2, or can the tag be added when applying the patch?
> 
> Regards,
> Vladislav

I think that Jonathan can just add it while applying. No need to
send a v2 unless explicitly asked.

-- 
Kind regards,
Joshua Crofts