[PATCH v2 0/4] MIPS: dts: ralink: mt7628a: Tweak for GARDENA smart Gateway

[PATCH v2 0/4] MIPS: dts: ralink: mt7628a: Tweak for GARDENA smart Gateway

[Ezra Buehler]

From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>

Various devicetree changes needed for the MT7688-based GARDENA smart
Gateway.

Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
---
Changes in v2:
- Add patch for mediatek,mtmips-sysc DT binding
- Add Reviewed-by tags
- Link to v1: https://lore.kernel.org/20250611194716.302126-1-ezra@easyb.ch

---
Ezra Buehler (4):
  dt-bindings: clock: mediatek,mtmips-sysc: Adapt compatible for MT7688
    boards
  MIPS: dts: ralink: mt7628a: Fix sysc's compatible property for MT7688
  MIPS: dts: ralink: mt7628a: Update watchdog node according to bindings
  MIPS: dts: ralink: gardena_smart_gateway_mt7688: Fix power LED

 .../bindings/clock/mediatek,mtmips-sysc.yaml  | 29 +++++++++++--------
 .../ralink/gardena_smart_gateway_mt7688.dts   |  2 +-
 arch/mips/boot/dts/ralink/mt7628a.dtsi        | 11 ++-----
 3 files changed, 21 insertions(+), 21 deletions(-)

--
2.43.0

[PATCH v2 1/4] dt-bindings: clock: mediatek,mtmips-sysc: Adapt compatible for MT7688 boards

[Ezra Buehler]

From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>

As the MT7628 and MT7688 are identical in most respects, mt7628a.dtsi is
used for both SoCs. To prevent "Kernel panic - not syncing: unable to
get CPU clock, err=-2" and allow an MT7688-based board to boot, the
following must be allowed:

    compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";

Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
---
 .../bindings/clock/mediatek,mtmips-sysc.yaml  | 29 +++++++++++--------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
index 83c1803ffd16..550807301fc5 100644
--- a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
+++ b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
@@ -26,18 +26,23 @@ description: |
 
 properties:
   compatible:
-    items:
-      - enum:
-          - ralink,mt7620-sysc
-          - ralink,mt7628-sysc
-          - ralink,mt7688-sysc
-          - ralink,rt2880-sysc
-          - ralink,rt3050-sysc
-          - ralink,rt3052-sysc
-          - ralink,rt3352-sysc
-          - ralink,rt3883-sysc
-          - ralink,rt5350-sysc
-      - const: syscon
+    oneOf:
+      - items:
+          - enum:
+              - ralink,mt7620-sysc
+              - ralink,mt7628-sysc
+              - ralink,mt7688-sysc
+              - ralink,rt2880-sysc
+              - ralink,rt3050-sysc
+              - ralink,rt3052-sysc
+              - ralink,rt3352-sysc
+              - ralink,rt3883-sysc
+              - ralink,rt5350-sysc
+          - const: syscon
+      - items:
+          - const: ralink,mt7628-sysc
+          - const: ralink,mt7688-sysc
+          - const: syscon
 
   reg:
     maxItems: 1
-- 
2.43.0

Re: [PATCH v2 1/4] dt-bindings: clock: mediatek,mtmips-sysc: Adapt compatible for MT7688 boards

[Krzysztof Kozlowski]

On 17/06/2025 12:30, Ezra Buehler wrote:
> From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> 
> As the MT7628 and MT7688 are identical in most respects, mt7628a.dtsi is
> used for both SoCs. To prevent "Kernel panic - not syncing: unable to
> get CPU clock, err=-2" and allow an MT7688-based board to boot, the
> following must be allowed:
> 
>     compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";
> 
> Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> ---
>  .../bindings/clock/mediatek,mtmips-sysc.yaml  | 29 +++++++++++--------
>  1 file changed, 17 insertions(+), 12 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
> index 83c1803ffd16..550807301fc5 100644
> --- a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
> +++ b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
> @@ -26,18 +26,23 @@ description: |
>  
>  properties:
>    compatible:
> -    items:
> -      - enum:
> -          - ralink,mt7620-sysc
> -          - ralink,mt7628-sysc
> -          - ralink,mt7688-sysc
> -          - ralink,rt2880-sysc
> -          - ralink,rt3050-sysc
> -          - ralink,rt3052-sysc
> -          - ralink,rt3352-sysc
> -          - ralink,rt3883-sysc
> -          - ralink,rt5350-sysc
> -      - const: syscon
> +    oneOf:
> +      - items:
> +          - enum:
> +              - ralink,mt7620-sysc
> +              - ralink,mt7628-sysc

It's here already, so this must be dropped.


Best regards,
Krzysztof

Re: [PATCH v2 1/4] dt-bindings: clock: mediatek,mtmips-sysc: Adapt compatible for MT7688 boards

[Krzysztof Kozlowski]

On 17/06/2025 13:40, Krzysztof Kozlowski wrote:
> On 17/06/2025 12:30, Ezra Buehler wrote:
>> From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
>>
>> As the MT7628 and MT7688 are identical in most respects, mt7628a.dtsi is
>> used for both SoCs. To prevent "Kernel panic - not syncing: unable to
>> get CPU clock, err=-2" and allow an MT7688-based board to boot, the
>> following must be allowed:
>>
>>     compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";
>>
>> Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
>> ---
>>  .../bindings/clock/mediatek,mtmips-sysc.yaml  | 29 +++++++++++--------
>>  1 file changed, 17 insertions(+), 12 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
>> index 83c1803ffd16..550807301fc5 100644
>> --- a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
>> +++ b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
>> @@ -26,18 +26,23 @@ description: |
>>  
>>  properties:
>>    compatible:
>> -    items:
>> -      - enum:
>> -          - ralink,mt7620-sysc
>> -          - ralink,mt7628-sysc
>> -          - ralink,mt7688-sysc
>> -          - ralink,rt2880-sysc
>> -          - ralink,rt3050-sysc
>> -          - ralink,rt3052-sysc
>> -          - ralink,rt3352-sysc
>> -          - ralink,rt3883-sysc
>> -          - ralink,rt5350-sysc
>> -      - const: syscon
>> +    oneOf:
>> +      - items:
>> +          - enum:
>> +              - ralink,mt7620-sysc
>> +              - ralink,mt7628-sysc
> 
> It's here already, so this must be dropped.


I meant mt7628 is here already and you are adding it again further, so
it is now in two places.


Best regards,
Krzysztof

Re: [PATCH v2 1/4] dt-bindings: clock: mediatek,mtmips-sysc: Adapt compatible for MT7688 boards

[Ezra Buehler]

On Tue, Jun 17, 2025 at 2:05 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> On 17/06/2025 13:40, Krzysztof Kozlowski wrote:
> > On 17/06/2025 12:30, Ezra Buehler wrote:
> >> From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> >>
> >> As the MT7628 and MT7688 are identical in most respects, mt7628a.dtsi is
> >> used for both SoCs. To prevent "Kernel panic - not syncing: unable to
> >> get CPU clock, err=-2" and allow an MT7688-based board to boot, the
> >> following must be allowed:
> >>
> >>     compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";
> >>
> >> Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> >> ---
> >>  .../bindings/clock/mediatek,mtmips-sysc.yaml  | 29 +++++++++++--------
> >>  1 file changed, 17 insertions(+), 12 deletions(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
> >> index 83c1803ffd16..550807301fc5 100644
> >> --- a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
> >> +++ b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
> >> @@ -26,18 +26,23 @@ description: |
> >>
> >>  properties:
> >>    compatible:
> >> -    items:
> >> -      - enum:
> >> -          - ralink,mt7620-sysc
> >> -          - ralink,mt7628-sysc
> >> -          - ralink,mt7688-sysc
> >> -          - ralink,rt2880-sysc
> >> -          - ralink,rt3050-sysc
> >> -          - ralink,rt3052-sysc
> >> -          - ralink,rt3352-sysc
> >> -          - ralink,rt3883-sysc
> >> -          - ralink,rt5350-sysc
> >> -      - const: syscon
> >> +    oneOf:
> >> +      - items:
> >> +          - enum:
> >> +              - ralink,mt7620-sysc
> >> +              - ralink,mt7628-sysc
> >
> > It's here already, so this must be dropped.
>
>
> I meant mt7628 is here already and you are adding it again further, so
> it is now in two places.

My idea was to support these variants, as they are all valid:

compatible = "ralink,mt7628-sysc", "syscon";
compatible = "ralink,mt7688-sysc", "syscon";
compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";

And, for simplicity, I decided not to support:

compatible = "ralink,mt7688-sysc", "ralink,mt7628-sysc", "syscon";

Excuse my ignorance, but I do not know how to do that differently. Or,
is the idea to only support what we are actually using (within Linux)?

Cheers,
Ezra.

Re: [PATCH v2 1/4] dt-bindings: clock: mediatek,mtmips-sysc: Adapt compatible for MT7688 boards

[Krzysztof Kozlowski]

On 17/06/2025 17:29, Ezra Buehler wrote:
> On Tue, Jun 17, 2025 at 2:05 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>>
>> On 17/06/2025 13:40, Krzysztof Kozlowski wrote:
>>> On 17/06/2025 12:30, Ezra Buehler wrote:
>>>> From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
>>>>
>>>> As the MT7628 and MT7688 are identical in most respects, mt7628a.dtsi is
>>>> used for both SoCs. To prevent "Kernel panic - not syncing: unable to
>>>> get CPU clock, err=-2" and allow an MT7688-based board to boot, the
>>>> following must be allowed:
>>>>
>>>>     compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";
>>>>
>>>> Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
>>>> ---
>>>>  .../bindings/clock/mediatek,mtmips-sysc.yaml  | 29 +++++++++++--------
>>>>  1 file changed, 17 insertions(+), 12 deletions(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
>>>> index 83c1803ffd16..550807301fc5 100644
>>>> --- a/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
>>>> +++ b/Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
>>>> @@ -26,18 +26,23 @@ description: |
>>>>
>>>>  properties:
>>>>    compatible:
>>>> -    items:
>>>> -      - enum:
>>>> -          - ralink,mt7620-sysc
>>>> -          - ralink,mt7628-sysc
>>>> -          - ralink,mt7688-sysc
>>>> -          - ralink,rt2880-sysc
>>>> -          - ralink,rt3050-sysc
>>>> -          - ralink,rt3052-sysc
>>>> -          - ralink,rt3352-sysc
>>>> -          - ralink,rt3883-sysc
>>>> -          - ralink,rt5350-sysc
>>>> -      - const: syscon
>>>> +    oneOf:
>>>> +      - items:
>>>> +          - enum:
>>>> +              - ralink,mt7620-sysc
>>>> +              - ralink,mt7628-sysc
>>>
>>> It's here already, so this must be dropped.
>>
>>
>> I meant mt7628 is here already and you are adding it again further, so
>> it is now in two places.
> 
> My idea was to support these variants, as they are all valid:
> 
> compatible = "ralink,mt7628-sysc", "syscon";
> compatible = "ralink,mt7688-sysc", "syscon";
> compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";

How is it valid? Provide arguments because this defies logic. Device is
and is not compatible with 7688? The same time? How, really how?


Best regards,
Krzysztof

[PATCH v2 2/4] MIPS: dts: ralink: mt7628a: Fix sysc's compatible property for MT7688

[Ezra Buehler]

From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>

Otherwise, the MT7688-based GARDENA smart Gateway will fail to boot
printing "Kernel panic - not syncing: unable to get CPU clock, err=-2".

Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
Reviewed-by: Stefan Roese <sr@denx.de>
---
 arch/mips/boot/dts/ralink/mt7628a.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/boot/dts/ralink/mt7628a.dtsi b/arch/mips/boot/dts/ralink/mt7628a.dtsi
index 0212700c4fb4..10221a41f02a 100644
--- a/arch/mips/boot/dts/ralink/mt7628a.dtsi
+++ b/arch/mips/boot/dts/ralink/mt7628a.dtsi
@@ -33,7 +33,7 @@ palmbus@10000000 {
 		#size-cells = <1>;
 
 		sysc: syscon@0 {
-			compatible = "ralink,mt7628-sysc", "syscon";
+			compatible = "ralink,mt7628-sysc", "ralink,mt7688-sysc", "syscon";
 			reg = <0x0 0x60>;
 			#clock-cells = <1>;
 			#reset-cells = <1>;
-- 
2.43.0

[PATCH v2 3/4] MIPS: dts: ralink: mt7628a: Update watchdog node according to bindings

[Ezra Buehler]

From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>

Most notably, add the mediatek,sysctl phandle and remove the redundant
reset/interrupt-related properties from the watchdog node. This is in
line with the corresponding devicetree (mt7628an.dtsi) used by the
OpenWrt project.

This has been tested on the MT7688-based GARDENA smart Gateway.

Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
---
 arch/mips/boot/dts/ralink/mt7628a.dtsi | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/arch/mips/boot/dts/ralink/mt7628a.dtsi b/arch/mips/boot/dts/ralink/mt7628a.dtsi
index 10221a41f02a..5d7a6cfa9e2b 100644
--- a/arch/mips/boot/dts/ralink/mt7628a.dtsi
+++ b/arch/mips/boot/dts/ralink/mt7628a.dtsi
@@ -134,13 +134,8 @@ pinmux_p4led_an_gpio: p4led-an-gpio-pins {
 
 		watchdog: watchdog@100 {
 			compatible = "mediatek,mt7621-wdt";
-			reg = <0x100 0x30>;
-
-			resets = <&sysc 8>;
-			reset-names = "wdt";
-
-			interrupt-parent = <&intc>;
-			interrupts = <24>;
+			reg = <0x100 0x100>;
+			mediatek,sysctl = <&sysc>;
 
 			status = "disabled";
 		};
-- 
2.43.0

[PATCH v2 4/4] MIPS: dts: ralink: gardena_smart_gateway_mt7688: Fix power LED

[Ezra Buehler]

From: Ezra Buehler <ezra.buehler@husqvarnagroup.com>

When starting up, the GARDENA smart Gateway's power LED should be
flashing green. It is unclear why it was initially set to "off".

The LED frequency cannot be configured in the devicetree. Luckily, the
default is 1 Hz, which is what we want.

Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
---
 arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts b/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts
index 7743d014631a..0bfb1dde9764 100644
--- a/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts
+++ b/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts
@@ -56,7 +56,7 @@ led-power-blue {
 		led-power-green {
 			label = "smartgw:power:green";
 			gpios = <&gpio 19 GPIO_ACTIVE_HIGH>;
-			default-state = "off";
+			linux,default-trigger = "timer";
 		};
 
 		led-power-red {
-- 
2.43.0