diff mbox series

[RFC,5/7] dt-bindings: regulator: bd9576 add FET ON-resistance for OCW

Message ID b7025d14fc8eb0eac95437ac62e74f64a7cf2b4c.1613042245.git.matti.vaittinen@fi.rohmeurope.com (mailing list archive)
State Superseded
Headers show
Series Extend regulator notification support | expand

Commit Message

Vaittinen, Matti Feb. 11, 2021, 12:35 p.m. UTC
BD9576MUF provides over-current protection and detection. Current is
measured as voltage loss over external FET. Allow specifying FET's on
resistance so current monitoring limits can be converted to voltages.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
---
 .../devicetree/bindings/regulator/rohm,bd9576-regulator.yaml | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Rob Herring (Arm) Feb. 11, 2021, 2:56 p.m. UTC | #1
On Thu, 11 Feb 2021 14:35:41 +0200, Matti Vaittinen wrote:
> BD9576MUF provides over-current protection and detection. Current is
> measured as voltage loss over external FET. Allow specifying FET's on
> resistance so current monitoring limits can be converted to voltages.
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> ---
>  .../devicetree/bindings/regulator/rohm,bd9576-regulator.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:
./Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml:31:34: [error] empty value in block mapping (empty-values)

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml: patternProperties:regulator-.+:properties:description: "External FET's ON-resistance. Required if VoutS1 OCP/OCW is to be set." is not of type 'object', 'boolean'
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml: patternProperties:regulator-.+:properties:rohm,ocw-fet-ron-milliohms: None is not of type 'object', 'boolean'
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml: patternProperties:regulator-.+:properties: {'enum': ['$ref', 'additionalItems', 'additionalProperties', 'allOf', 'anyOf', 'const', 'contains', 'default', 'dependencies', 'deprecated', 'description', 'else', 'enum', 'if', 'items', 'maxItems', 'maximum', 'minItems', 'minimum', 'multipleOf', 'not', 'oneOf', 'pattern', 'patternProperties', 'properties', 'propertyNames', 'required', 'then', 'unevaluatedProperties']} is not allowed for 'description'
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml: patternProperties:regulator-.+:properties:rohm,ocw-fet-ron-milliohms: None is not of type 'object'
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml: ignoring, error in schema: patternProperties: regulator-.+: properties: rohm,ocw-fet-ron-milliohms
warning: no schema found in file: ./Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml

See https://patchwork.ozlabs.org/patch/1439442

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.
Rob Herring (Arm) Feb. 17, 2021, 9:34 p.m. UTC | #2
On Thu, Feb 11, 2021 at 02:35:41PM +0200, Matti Vaittinen wrote:
> BD9576MUF provides over-current protection and detection. Current is
> measured as voltage loss over external FET. Allow specifying FET's on
> resistance so current monitoring limits can be converted to voltages.
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> ---
>  .../devicetree/bindings/regulator/rohm,bd9576-regulator.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml b/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
> index b6515a0cee62..ad3f57e9cd9b 100644
> --- a/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
> +++ b/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
> @@ -27,6 +27,11 @@ patternProperties:
>        Properties for single regulator.
>      $ref: "regulator.yaml#"
>  
> +    properties:
> +      rohm,ocw-fet-ron-milliohms:

We have '-ohms' and '-micro-ohms' already. Neither range works for you?

> +      description: External FET's ON-resistance. Required if VoutS1 OCP/OCW is
> +        to be set.
> +
>      required:
>        - regulator-name
>  
> -- 
> 2.25.4
> 
> 
> -- 
> Matti Vaittinen, Linux device drivers
> ROHM Semiconductors, Finland SWDC
> Kiviharjunlenkki 1E
> 90220 OULU
> FINLAND
> 
> ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
> Simon says - in Latin please.
> ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
> Thanks to Simon Glass for the translation =]
Vaittinen, Matti Feb. 18, 2021, 6:15 a.m. UTC | #3
Morning Rob,

On Wed, 2021-02-17 at 15:34 -0600, Rob Herring wrote:
> On Thu, Feb 11, 2021 at 02:35:41PM +0200, Matti Vaittinen wrote:
> > BD9576MUF provides over-current protection and detection. Current
> > is
> > measured as voltage loss over external FET. Allow specifying FET's
> > on
> > resistance so current monitoring limits can be converted to
> > voltages.
> > 
> > Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> > ---
> >  .../devicetree/bindings/regulator/rohm,bd9576-regulator.yaml | 5
> > +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/regulator/rohm,bd9576-
> > regulator.yaml
> > b/Documentation/devicetree/bindings/regulator/rohm,bd9576-
> > regulator.yaml
> > index b6515a0cee62..ad3f57e9cd9b 100644
> > --- a/Documentation/devicetree/bindings/regulator/rohm,bd9576-
> > regulator.yaml
> > +++ b/Documentation/devicetree/bindings/regulator/rohm,bd9576-
> > regulator.yaml
> > @@ -27,6 +27,11 @@ patternProperties:
> >        Properties for single regulator.
> >      $ref: "regulator.yaml#"
> >  
> > +    properties:
> > +      rohm,ocw-fet-ron-milliohms:
> 
> We have '-ohms' and '-micro-ohms' already. Neither range works for
> you?

Thanks for taking a look at this :)

I expect values to be magnitude of few hundred milliohms - which means
micro-ohms should be usable. I'll try to still check this as I am far
from being HW-expert. I probably can convert this to micro-ohms for v2.

Best Regards
	Matti Vaittinen

--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland
SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~

Simon says - in Latin please.
"non cogito me" dixit Rene Descarte, deinde evanescavit

(Thanks for the translation Simon)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml b/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
index b6515a0cee62..ad3f57e9cd9b 100644
--- a/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
@@ -27,6 +27,11 @@  patternProperties:
       Properties for single regulator.
     $ref: "regulator.yaml#"
 
+    properties:
+      rohm,ocw-fet-ron-milliohms:
+      description: External FET's ON-resistance. Required if VoutS1 OCP/OCW is
+        to be set.
+
     required:
       - regulator-name