[PATCH v4 0/4] watchdog: rzn1: clean up and drop irq requirement

[PATCH v4 0/4] watchdog: rzn1: clean up and drop irq requirement

[Wolfram Sang]

Changes since v3:
* rebased to v7.1-rc2
* added patches 3+4 to remove irq handling
* added tags for patches 1+2 (Thanks, Guenter!)

For easier dependency handling, I picked up Herve's v3 series and added
my patches on top. Herve's changes to the N1D syscon are now upstream,
so the watchdog can reset the system directly. Leaving only his cleanup
patches to be applied, already reviewed by Guenter. Then, my patches
remove the now unneeded irq handling and make irqs optional in DTs. All
tested on the Renesas RZ/N1D demo board.

Please apply.


Herve Codina (Schneider Electric) (2):
  watchdog: rzn1: Fix reverse xmas tree declaration
  watchdog: rzn1: Use dev_err_probe()

Wolfram Sang (2):
  watchdog: rzn1: remove now obsolete interrupt support
  dt-bindings: watchdog: renesas,rzn1-wdt: interrupts are not required

 .../bindings/watchdog/renesas,rzn1-wdt.yaml   |  1 -
 drivers/watchdog/rzn1_wdt.c                   | 35 +++----------------
 2 files changed, 5 insertions(+), 31 deletions(-)

-- 
2.47.3

[PATCH v4 4/4] dt-bindings: watchdog: renesas,rzn1-wdt: interrupts are not required

[Wolfram Sang]

It is now understood how the watchdog can do its job without the need of
an interrupt. So, it is not required anymore but optional.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml b/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml
index 7e3ee533cd56..0e4b5b529e9c 100644
--- a/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml
@@ -29,7 +29,6 @@ properties:
 required:
   - compatible
   - reg
-  - interrupts
   - clocks
 
 allOf:
-- 
2.47.3

Re: [PATCH v4 4/4] dt-bindings: watchdog: renesas,rzn1-wdt: interrupts are not required

[Herve Codina]

Hi Wolfram,

On Thu,  7 May 2026 12:24:09 +0200
Wolfram Sang <wsa+renesas@sang-engineering.com> wrote:

> It is now understood how the watchdog can do its job without the need of
> an interrupt. So, it is not required anymore but optional.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
>  Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml | 1 -
>  1 file changed, 1 deletion(-)
> 

Reviewed-by: Herve Codina <herve.codina@bootlin.com>

Best regards,
Hervé

Re: [PATCH v4 4/4] dt-bindings: watchdog: renesas,rzn1-wdt: interrupts are not required

[Guenter Roeck]

On Thu, May 07, 2026 at 12:24:09PM +0200, Wolfram Sang wrote:
> It is now understood how the watchdog can do its job without the need of
> an interrupt. So, it is not required anymore but optional.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Reviewed-by: Herve Codina <herve.codina@bootlin.com>

Waiting for DT maintainer approval.

For my reference:

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

Thanks,
Guenter

> ---
>  Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml b/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml
> index 7e3ee533cd56..0e4b5b529e9c 100644
> --- a/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/renesas,rzn1-wdt.yaml
> @@ -29,7 +29,6 @@ properties:
>  required:
>    - compatible
>    - reg
> -  - interrupts
>    - clocks
>  
>  allOf: