linux-kernel - Re: [PATCH v3 1/4] dt-bindings: thermal: k3: Add VTM bindings documentation

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Date:   Thu, 20 Feb 2020 13:40:49 -0600
From:   Rob Herring <robh@...nel.org>
To:     Keerthy <j-keerthy@...com>
Cc:     Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        Tero Kristo <t-kristo@...com>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:THERMAL" <linux-pm@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v3 1/4] dt-bindings: thermal: k3: Add VTM bindings documentation

On Wed, Feb 19, 2020 at 10:13 PM Keerthy <j-keerthy@...com> wrote:
>
>
>
> On 19/02/20 8:22 pm, Rob Herring wrote:
> > On Wed, Feb 19, 2020 at 01:13:11PM +0530, Keerthy wrote:
> >> Add VTM bindings documentation. In the Voltage Thermal
> >> Management Module(VTM), K3 AM654 supplies a voltage
> >> reference and a temperature sensor feature that are gathered in the band
> >> gap voltage and temperature sensor (VBGAPTS) module. The band
> >> gap provides current and voltage reference for its internal
> >> circuits and other analog IP blocks. The analog-to-digital
> >> converter (ADC) produces an output value that is proportional
> >> to the silicon temperature.
> >>
> >> Signed-off-by: Keerthy <j-keerthy@...com>
> >> ---
> >>
> >> Changes in v3:
> >>
> >>    * Fixed errors seen with:
> >>      dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
> >>
> >>   .../bindings/thermal/ti,am654-thermal.yaml    | 57 +++++++++++++++++++
> >>   1 file changed, 57 insertions(+)
> >>   create mode 100644 Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
> >>
> >> diff --git a/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
> >> new file mode 100644
> >> index 000000000000..b6dc95c3acab
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml
> >> @@ -0,0 +1,57 @@
> >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> >> +%YAML 1.2
> >> +---
> >> +$id: http://devicetree.org/schemas/thermal/ti,am654-thermal.yaml#
> >> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >> +
> >> +title: Texas Instruments AM654 VTM (DTS) binding
> >> +
> >> +maintainers:
> >> +  - Keerthy <j-keerthy@...com>
> >> +
> >> +properties:
> >> +  compatible:
> >> +    const: ti,am654-vtm
> >> +
> >> +  reg:
> >> +    maxItems: 1
> >> +
> >> +  power-domains:
> >> +    maxItems: 1
> >> +    description: phandle to the associated power domain
> >
> > No need to redefine a standard property description.
>
> Okay.
>
> >
> >> +
> >> +  "#thermal-sensor-cells":
> >> +    const: 1
> >> +
> >> +required:
> >> +  - "#thermal-sensor-cells"
> >> +  - compatible
> >> +  - reg
> >> +  - power-domains
> >> +
> >> +additionalProperties: false
> >> +
> >> +examples:
> >> +  - |
> >> +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
> >> +    vtm: wkup_vtm0@...50000 {
> >
> > thermal-sensor@...
> >
> > Use generic node names and don't use '_' in node names
>
> vtm stands for voltage thermal manager and comprises of multiple
> sensors. This is similar to omap bandgap. Should i replace vtm with more
> generic name like thermal? as used in:

'vtm' is a label and source construct only (until you do overlays), so
I don't care what you put really.

Rob