[PATCH 4/4] dt-bindings: watchdog: samsung-wdt: Split if:then: and constrain more

[Guenter Roeck]

On Sat, Aug 30, 2025 at 12:19:00PM +0200, Krzysztof Kozlowski wrote:
> Binding defined two if:then: blocks covering different conditions but
> not fully constraining the properties per each variant:
> 1. "if:" to require samsung,syscon-phandle,
> 2. "if:" with "else:" to narrow number of clocks and require or disallow
>    samsung,cluster-index.
> 
> This still did not cover following cases:
> 1. Disallow samsung,syscon-phandle when not applicable,
> 2. Narrow samsung,cluster-index to [0, 1], for SoCs with only two
>    clusters.
> 
> Solving this in current format would lead to spaghetti code, so re-write
> entire "if:then:" approach into mutually exclusive cases so each SoC
> appears only in one "if:" block.  This allows to forbid
> samsung,syscon-phandle for S3C6410, and narrow samsung,cluster-index
> to [0, 1].
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

Acked-by: Guenter Roeck <linux at roeck-us.net>