mbox series

[v7,0/2] thermal: k3_j72xx_bandgap: Add the bandgap driver support

Message ID 20220511110657.16305-1-j-keerthy@ti.com
Headers show
Series thermal: k3_j72xx_bandgap: Add the bandgap driver support | expand

Message

J, KEERTHY May 11, 2022, 11:06 a.m. UTC
Add VTM thermal support. In the Voltage Thermal Management
Module(VTM), K3 J72XX 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.

Currently reading temperatures only is supported.  There are no
active/passive cooling agent supported.

J721e SoCs have errata i2128: https://www.ti.com/lit/pdf/sprz455

The series also incorporates workaround for Errata i2128.

Changes in v7:

  * Separated the DT patches from this series.
  * Fixed description of reg property in the DT documentation patch.

Changes in v6:

  * Fixed the DT comments that were missed in v5.
  * Changed the offsets, bit masks to 2-D array.
  * Clean up

Changes in v5:

  * Simplified the computation of the table.
  * Removed unnecessary members in the structures.

Changes in v4:

  * Fixed compilation warning with W=1.

Changes in v3:

  * Removed static look up tables & added functions to dynamically generate them.

Changes in v2:

  * Fixed DT binding errors.
 

Keerthy (2):
  dt-bindings: thermal: k3-j72xx: Add VTM bindings documentation
  thermal: k3_j72xx_bandgap: Add the bandgap driver support

 .../bindings/thermal/ti,j72xx-thermal.yaml    |  64 ++
 drivers/thermal/Makefile                      |   2 +-
 drivers/thermal/k3_j72xx_bandgap.c            | 566 ++++++++++++++++++
 3 files changed, 631 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
 create mode 100644 drivers/thermal/k3_j72xx_bandgap.c

Comments

Daniel Lezcano May 16, 2022, 10:32 a.m. UTC | #1
Cc'ing krzysztof.kozlowski@linaro.org

On 11/05/2022 13:06, Keerthy wrote:
> Add VTM bindings documentation. In the Voltage Thermal
> Management Module(VTM), K3 J72XX 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@ti.com>
> ---
>   .../bindings/thermal/ti,j72xx-thermal.yaml    | 64 +++++++++++++++++++
>   1 file changed, 64 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
> 
> diff --git a/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
> new file mode 100644
> index 000000000000..83f8f444a133
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/ti,j72xx-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments J72XX VTM (DTS) binding
> +
> +maintainers:
> +  - Keerthy <j-keerthy@ti.com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - ti,j721e-vtm
> +          - ti,j7200-vtm
> +
> +  reg:
> +    items:
> +      - description: VTM cfg1 register space
> +      - description: VTM cfg2 register space
> +      - description: VTM efuse register space
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  "#thermal-sensor-cells":
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +  - "#thermal-sensor-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +    wkup_vtm0: thermal-sensor@42040000 {
> +        compatible = "ti,j721e-vtm";
> +        reg = <0x42040000 0x350>,
> +            <0x42050000 0x350>,
> +            <0x43000300 0x10>;
> +        power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;
> +        #thermal-sensor-cells = <1>;
> +    };
> +
> +    mpu_thermal: mpu-thermal {
> +        polling-delay-passive = <250>; /* milliseconds */
> +        polling-delay = <500>; /* milliseconds */
> +        thermal-sensors = <&wkup_vtm0 0>;
> +
> +        trips {
> +                mpu_crit: mpu-crit {
> +                        temperature = <125000>; /* milliCelsius */
> +                        hysteresis = <2000>; /* milliCelsius */
> +                        type = "critical";
> +                };
> +        };
> +    };
> +...
Krzysztof Kozlowski May 16, 2022, 10:40 a.m. UTC | #2
On 16/05/2022 12:32, Daniel Lezcano wrote:
> 
> Cc'ing krzysztof.kozlowski@linaro.org

Eh, I wished people used automatically scripts/get_maintainers.pl, so
there will be no need to Cc someone. It's actually a bit weird because I
was reviewing v6...

> 
> On 11/05/2022 13:06, Keerthy wrote:
>> Add VTM bindings documentation. In the Voltage Thermal
>> Management Module(VTM), K3 J72XX 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@ti.com>


In any case this misses all the review-tags, so I don't know what we are
supposed to do here.


Keerthy,
Please add Acked-by/Reviewed-by tags when posting new versions. However,
there's no need to repost patches *only* to add the tags. The upstream
maintainer will do that for acks received on the version they apply.

https://elixir.bootlin.com/linux/v5.13/source/Documentation/process/submitting-patches.rst#L543

If a tag was not added on purpose, please state why and what changed.

>> ---
>>   .../bindings/thermal/ti,j72xx-thermal.yaml    | 64 +++++++++++++++++++
>>   1 file changed, 64 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
>> new file mode 100644
>> index 000000000000..83f8f444a133
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml
>> @@ -0,0 +1,64 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/thermal/ti,j72xx-thermal.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Texas Instruments J72XX VTM (DTS) binding
>> +
>> +maintainers:
>> +  - Keerthy <j-keerthy@ti.com>
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - enum:
>> +          - ti,j721e-vtm
>> +          - ti,j7200-vtm

No items, you have only one item.


Best regards,
Krzysztof