diff mbox series

[v9,01/15] dt-bindings: thermal: qcom: add adc-thermal monitor bindings

Message ID 20201102174950.1148498-2-dmitry.baryshkov@linaro.org (mailing list archive)
State New, archived
Headers show
Series qcom: pm8150: add support for thermal monitoring | expand

Commit Message

Dmitry Baryshkov Nov. 2, 2020, 5:49 p.m. UTC
Add bindings for thermal monitor, part of Qualcomm PMIC5 chips. It is a
close counterpart of VADC part of those PMICs.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/thermal/qcom-spmi-adc-tm5.yaml   | 154 ++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml

Comments

Rob Herring (Arm) Nov. 4, 2020, 6:32 p.m. UTC | #1
On Mon, 02 Nov 2020 20:49:36 +0300, Dmitry Baryshkov wrote:
> Add bindings for thermal monitor, part of Qualcomm PMIC5 chips. It is a
> close counterpart of VADC part of those PMICs.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
>  .../bindings/thermal/qcom-spmi-adc-tm5.yaml   | 154 ++++++++++++++++++
>  1 file changed, 154 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml
> 


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

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.example.dt.yaml: adc@3100: 'io-channels' is a dependency of 'io-channel-ranges'
	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/iio/iio-consumer.yaml


See https://patchwork.ozlabs.org/patch/1392425

The base for the patch is generally the last rc1. Any dependencies
should be noted.

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.
Jonathan Cameron Nov. 8, 2020, 3:52 p.m. UTC | #2
On Wed, 4 Nov 2020 12:32:30 -0600
Rob Herring <robh@kernel.org> wrote:

> On Mon, 02 Nov 2020 20:49:36 +0300, Dmitry Baryshkov wrote:
> > Add bindings for thermal monitor, part of Qualcomm PMIC5 chips. It is a
> > close counterpart of VADC part of those PMICs.
> > 
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> > Reviewed-by: Rob Herring <robh@kernel.org>

Ah, this got picked up by the additions I made to dt-schema the other day.

So there are a few existing places where io-channel-ranges is miss provided
in dtsi files for io-channel providers (it's being ignored in most the places
it is specified!)

What it means is that the child nodes may use io-channel entries of their parent.
Hence it should only be specified on the consumer side.
Here we don't actually need it for the consumer either as the io-channels
entry is in the child node, not the parent.

I'm kind of assuming that I'll eventually do the immutable branch for this
series. If so I can clean this up whilst applying if everything else is fine
with v9.

Thanks,

Jonathan


> > ---
> >  .../bindings/thermal/qcom-spmi-adc-tm5.yaml   | 154 ++++++++++++++++++
> >  1 file changed, 154 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml
> >   
> 
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.example.dt.yaml: adc@3100: 'io-channels' is a dependency of 'io-channel-ranges'
> 	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/iio/iio-consumer.yaml
> 
> 
> See https://patchwork.ozlabs.org/patch/1392425
> 
> The base for the patch is generally the last rc1. Any dependencies
> should be noted.
> 
> 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.
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml b/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml
new file mode 100644
index 000000000000..9da2b349030d
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml
@@ -0,0 +1,154 @@ 
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/qcom-spmi-adc-tm5.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm's SPMI PMIC ADC Thermal Monitoring
+maintainers:
+  - Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
+
+properties:
+  compatible:
+    const: qcom,spmi-adc-tm5
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 1
+    description:
+      Number of cells required to uniquely identify the thermal sensors. Since
+      we have multiple sensors this is set to 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  qcom,avg-samples:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Number of samples to be used for measurement.
+    enum:
+      - 1
+      - 2
+      - 4
+      - 8
+      - 16
+    default: 1
+
+  qcom,decimation:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: This parameter is used to decrease ADC sampling rate.
+            Quicker measurements can be made by reducing decimation ratio.
+    enum:
+      - 250
+      - 420
+      - 840
+    default: 840
+
+patternProperties:
+  "^([-a-z0-9]*)@[0-7]$":
+    type: object
+    description:
+      Represent one thermal sensor.
+
+    properties:
+      reg:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Specify the sensor channel. There are 8 channels in PMIC5's ADC TM
+        minimum: 0
+        maximum: 7
+
+      io-channels:
+        description:
+          From common IIO binding. Used to pipe PMIC ADC channel to thermal monitor
+
+      qcom,ratiometric:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description:
+          Channel calibration type.
+          If this property is specified VADC will use the VDD reference
+          (1.875V) and GND for channel calibration. If property is not found,
+          channel will be calibrated with 0V and 1.25V reference channels,
+          also known as absolute calibration.
+
+      qcom,hw-settle-time-us:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Time between AMUX getting configured and the ADC starting conversion.
+        enum: [15, 100, 200, 300, 400, 500, 600, 700, 1000, 2000, 4000, 8000, 16000, 32000, 64000, 128000]
+
+      qcom,pre-scaling:
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        description: Used for scaling the channel input signal before the
+          signal is fed to VADC. The configuration for this node is to know the
+          pre-determined ratio and use it for post scaling. It is a pair of
+          integers, denoting the numerator and denominator of the fraction by
+          which input signal is multiplied. For example, <1 3> indicates the
+          signal is scaled down to 1/3 of its value before ADC measurement.  If
+          property is not found default value depending on chip will be used.
+        items:
+          - const: 1
+          - enum: [ 1, 3, 4, 6, 20, 8, 10 ]
+
+    required:
+      - reg
+      - io-channels
+
+    additionalProperties:
+      false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#address-cells"
+  - "#size-cells"
+  - "#thermal-sensor-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/iio/qcom,spmi-vadc.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spmi_bus {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pm8150b_adc: adc@3100 {
+            reg = <0x3100>;
+            compatible = "qcom,spmi-adc5";
+            #address-cells = <1>;
+            #size-cells = <0>;
+            #io-channel-cells = <1>;
+            io-channel-ranges;
+
+            /* Other propreties are omitted */
+            conn-therm@4f {
+                reg = <ADC5_AMUX_THM3_100K_PU>;
+                qcom,ratiometric;
+                qcom,hw-settle-time = <200>;
+            };
+        };
+
+        pm8150b_adc_tm: adc-tm@3500 {
+            compatible = "qcom,spmi-adc-tm5";
+            reg = <0x3500>;
+            interrupts = <0x2 0x35 0x0 IRQ_TYPE_EDGE_RISING>;
+            #thermal-sensor-cells = <1>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            conn-therm@0 {
+                reg = <0>;
+                io-channels = <&pm8150b_adc ADC5_AMUX_THM3_100K_PU>;
+                qcom,ratiometric;
+                qcom,hw-settle-time-us = <200>;
+            };
+        };
+    };
+...