diff mbox series

[17/22] dt-bindings: serial: document support for SA8255p

Message ID 20240828203721.2751904-18-quic_nkela@quicinc.com (mailing list archive)
State Not Applicable
Headers show
Series arm64: qcom: Introduce SA8255p Ride platform | expand

Commit Message

Nikunj Kela Aug. 28, 2024, 8:37 p.m. UTC
Add compatibles representing UART support on SA8255p.

Clocks and interconnects are being configured in the firmware VM
on SA8255p platform, therefore making them optional.

CC: Praveen Talari <quic_ptalari@quicinc.com>
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
---
 .../serial/qcom,serial-geni-qcom.yaml         | 58 ++++++++++++++++---
 1 file changed, 51 insertions(+), 7 deletions(-)

Comments

Krzysztof Kozlowski Aug. 29, 2024, 7:41 a.m. UTC | #1
On Wed, Aug 28, 2024 at 01:37:16PM -0700, Nikunj Kela wrote:
> Add compatibles representing UART support on SA8255p.
> 
> Clocks and interconnects are being configured in the firmware VM
> on SA8255p platform, therefore making them optional.
> 
> CC: Praveen Talari <quic_ptalari@quicinc.com>
> Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
> ---
>  .../serial/qcom,serial-geni-qcom.yaml         | 58 ++++++++++++++++---
>  1 file changed, 51 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
> index dd33794b3534..dcd43e1353ec 100644
> --- a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
> +++ b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
> @@ -13,11 +13,42 @@ maintainers:
>  allOf:
>    - $ref: /schemas/serial/serial.yaml#

Please move entire allOf: to the place after "required:" block.

>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,sa8255p-geni-uart
> +              - qcom,sa8255p-geni-debug-uart
> +    then:
> +      required:
> +        - power-domains
> +        - power-domain-names
> +      properties:
> +        power-domains:
> +          minItems: 2
> +          maxItems: 2
> +    else:
> +      required:
> +        - clocks
> +        - clock-names
> +      properties:
> +        power-domains:
> +          maxItems: 1
> +        interconnects:
> +          maxItems: 2
> +        interconnect-names:
> +          items:
> +            - const: qup-core
> +            - const: qup-config
> +
>  properties:
>    compatible:
>      enum:
>        - qcom,geni-uart
>        - qcom,geni-debug-uart
> +      - qcom,sa8255p-geni-uart
> +      - qcom,sa8255p-geni-debug-uart

Not compatible with the old ones? Well, it is impossible. Generic
compatible like "qcom,geni-uart" means ALL DEVICES forever will be
compatible, because otherwise it just does not make any sense.  Of
course "all devices forever will be compatible" is impossible as well,
thus DT maintainers are suggesting SoC-specific compatibles all the
time, but if developers decide that they know the future, you should
keep it, right?

>  
>    clocks:
>      maxItems: 1
> @@ -26,12 +57,10 @@ properties:
>      const: se
>  
>    interconnects:
> -    maxItems: 2
> +    description: phandles of interconnect bw provider

Constraints must stay in top-level.

Best regards,
Krzysztof
Nikunj Kela Aug. 29, 2024, 2:27 p.m. UTC | #2
On 8/29/2024 12:41 AM, Krzysztof Kozlowski wrote:
> On Wed, Aug 28, 2024 at 01:37:16PM -0700, Nikunj Kela wrote:
>> Add compatibles representing UART support on SA8255p.
>>
>> Clocks and interconnects are being configured in the firmware VM
>> on SA8255p platform, therefore making them optional.
>>
>> CC: Praveen Talari <quic_ptalari@quicinc.com>
>> Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
>> ---
>>  .../serial/qcom,serial-geni-qcom.yaml         | 58 ++++++++++++++++---
>>  1 file changed, 51 insertions(+), 7 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
>> index dd33794b3534..dcd43e1353ec 100644
>> --- a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
>> +++ b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
>> @@ -13,11 +13,42 @@ maintainers:
>>  allOf:
>>    - $ref: /schemas/serial/serial.yaml#
> Please move entire allOf: to the place after "required:" block.
>
>>  
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - qcom,sa8255p-geni-uart
>> +              - qcom,sa8255p-geni-debug-uart
>> +    then:
>> +      required:
>> +        - power-domains
>> +        - power-domain-names
>> +      properties:
>> +        power-domains:
>> +          minItems: 2
>> +          maxItems: 2
>> +    else:
>> +      required:
>> +        - clocks
>> +        - clock-names
>> +      properties:
>> +        power-domains:
>> +          maxItems: 1
>> +        interconnects:
>> +          maxItems: 2
>> +        interconnect-names:
>> +          items:
>> +            - const: qup-core
>> +            - const: qup-config
>> +
>>  properties:
>>    compatible:
>>      enum:
>>        - qcom,geni-uart
>>        - qcom,geni-debug-uart
>> +      - qcom,sa8255p-geni-uart
>> +      - qcom,sa8255p-geni-debug-uart
> Not compatible with the old ones? Well, it is impossible. Generic
> compatible like "qcom,geni-uart" means ALL DEVICES forever will be
> compatible, because otherwise it just does not make any sense.  Of
> course "all devices forever will be compatible" is impossible as well,
> thus DT maintainers are suggesting SoC-specific compatibles all the
> time, but if developers decide that they know the future, you should
> keep it, right?

Hi Krzysztof,

SA8255p uart is not compatible with generic ones. While I get your
point, could you please advise how to proceed on this? Of course, no one
could predict the future at the time generic compatibles were added but
here we are now with the usecase!

Thanks,

-Nikunj

>>  
>>    clocks:
>>      maxItems: 1
>> @@ -26,12 +57,10 @@ properties:
>>      const: se
>>  
>>    interconnects:
>> -    maxItems: 2
>> +    description: phandles of interconnect bw provider
> Constraints must stay in top-level.
>
> Best regards,
> Krzysztof
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
index dd33794b3534..dcd43e1353ec 100644
--- a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
+++ b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
@@ -13,11 +13,42 @@  maintainers:
 allOf:
   - $ref: /schemas/serial/serial.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sa8255p-geni-uart
+              - qcom,sa8255p-geni-debug-uart
+    then:
+      required:
+        - power-domains
+        - power-domain-names
+      properties:
+        power-domains:
+          minItems: 2
+          maxItems: 2
+    else:
+      required:
+        - clocks
+        - clock-names
+      properties:
+        power-domains:
+          maxItems: 1
+        interconnects:
+          maxItems: 2
+        interconnect-names:
+          items:
+            - const: qup-core
+            - const: qup-config
+
 properties:
   compatible:
     enum:
       - qcom,geni-uart
       - qcom,geni-debug-uart
+      - qcom,sa8255p-geni-uart
+      - qcom,sa8255p-geni-debug-uart
 
   clocks:
     maxItems: 1
@@ -26,12 +57,10 @@  properties:
     const: se
 
   interconnects:
-    maxItems: 2
+    description: phandles of interconnect bw provider
 
   interconnect-names:
-    items:
-      - const: qup-core
-      - const: qup-config
+    description: names of interconnects
 
   interrupts:
     minItems: 1
@@ -51,15 +80,19 @@  properties:
       - const: sleep
 
   power-domains:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
+
+  power-domain-names:
+    items:
+      - const: power
+      - const: perf
 
   reg:
     maxItems: 1
 
 required:
   - compatible
-  - clocks
-  - clock-names
   - interrupts
   - reg
 
@@ -83,4 +116,15 @@  examples:
                         <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_QUP_0 0>;
         interconnect-names = "qup-core", "qup-config";
     };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    serial@990000 {
+        compatible = "qcom,sa8255p-geni-uart";
+        reg = <0x990000 0x4000>;
+        interrupts = <GIC_SPI 531 IRQ_TYPE_LEVEL_HIGH>;
+        power-domains = <&scmi11_pd 4>, <&scmi11_dvfs 4>;
+        power-domain-names = "power", "perf";
+    };
 ...