linux-kernel - Re: [PATCH 4/4] dt-bindings: tas2562: Convert the tas2562 binding to yaml

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Date:   Mon, 20 Jul 2020 13:22:25 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Rob Herring <robh@...nel.org>
CC:     <lgirdwood@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
        <tiwai@...e.com>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH 4/4] dt-bindings: tas2562: Convert the tas2562 binding to
 yaml

Rob

On 7/15/20 3:15 PM, Rob Herring wrote:
> On Fri, Jun 26, 2020 at 10:41:43AM -0500, Dan Murphy wrote:
>> Convert the TAS2562 text file to yaml format.
>>
>> Signed-off-by: Dan Murphy <dmurphy@...com>
>> ---
>>   .../devicetree/bindings/sound/tas2562.txt     | 37 ---------
>>   .../devicetree/bindings/sound/tas2562.yaml    | 77 +++++++++++++++++++
>>   2 files changed, 77 insertions(+), 37 deletions(-)
>>   delete mode 100644 Documentation/devicetree/bindings/sound/tas2562.txt
>>   create mode 100644 Documentation/devicetree/bindings/sound/tas2562.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/sound/tas2562.txt b/Documentation/devicetree/bindings/sound/tas2562.txt
>> deleted file mode 100644
>> index dc6d7362ded7..000000000000
>> --- a/Documentation/devicetree/bindings/sound/tas2562.txt
>> +++ /dev/null
>> @@ -1,37 +0,0 @@
>> -Texas Instruments TAS2562 Smart PA
>> -
>> -The TAS2562 is a mono, digital input Class-D audio amplifier optimized for
>> -efficiently driving high peak power into small loudspeakers.
>> -Integrated speaker voltage and current sense provides for
>> -real time monitoring of loudspeaker behavior.
>> -
>> -Required properties:
>> - - #address-cells  - Should be <1>.
>> - - #size-cells     - Should be <0>.
>> - - compatible:	   - Should contain "ti,tas2562", "ti,tas2563".
>> - - reg:		   - The i2c address. Should be 0x4c, 0x4d, 0x4e or 0x4f.
>> - - ti,imon-slot-no:- TDM TX current sense time slot.
>> - - ti,vmon-slot-no:- TDM TX voltage sense time slot. This slot must always be
>> -		     greater then ti,imon-slot-no.
>> -
>> -Optional properties:
>> -- interrupt-parent: phandle to the interrupt controller which provides
>> -                    the interrupt.
>> -- interrupts: (GPIO) interrupt to which the chip is connected.
>> -- shut-down-gpio: GPIO used to control the state of the device.
>> -
>> -Examples:
>> -tas2562@4c {
>> -        #address-cells = <1>;
>> -        #size-cells = <0>;
>> -        compatible = "ti,tas2562";
>> -        reg = <0x4c>;
>> -
>> -        interrupt-parent = <&gpio1>;
>> -        interrupts = <14>;
>> -
>> -	shut-down-gpio = <&gpio1 15 0>;
>> -        ti,imon-slot-no = <0>;
>> -        ti,vmon-slot-no = <1>;
>> -};
>> -
>> diff --git a/Documentation/devicetree/bindings/sound/tas2562.yaml b/Documentation/devicetree/bindings/sound/tas2562.yaml
>> new file mode 100644
>> index 000000000000..1fb467e14d4c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/sound/tas2562.yaml
>> @@ -0,0 +1,77 @@
>> +# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
> Same licensing comment here as tas2770

OK I will fix it like I did with the other TAS2770 patches


>> +# Copyright (C) 2019 Texas Instruments Incorporated
>> +%YAML 1.2
>> +---
>> +$id: "http://devicetree.org/schemas/sound/tas2562.yaml#"
>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
>> +
>> +title: Texas Instruments TAS2562 Smart PA
>> +
>> +maintainers:
>> +  - Dan Murphy <dmurphy@...com>
>> +
>> +description: |
>> +  The TAS2562 is a mono, digital input Class-D audio amplifier optimized for
>> +  efficiently driving high peak power into small loudspeakers.
>> +  Integrated speaker voltage and current sense provides for
>> +  real time monitoring of loudspeaker behavior.
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - ti,tas2562
>> +      - ti,tas2563
>> +
>> +  reg:
>> +    maxItems: 1
>> +    description: |
>> +       I2C address of the device can be one of these 0x4c, 0x4d, 0x4e or 0x4f
>> +
>> +  shut-down-gpio:
>> +    description: GPIO used to control the state of the device.
>> +    deprecated: true
> Why do we need this as the driver never worked?

Not sure what you are asking.

Driver has been fixed for this specific binding in sound for-next.

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/commit/sound/soc/codecs/tas2562.c?h=for-next&id=bc07b54459cbb3a572a78b5c200ff79ef11b8158

>
>> +
>> +  shutdown-gpio:
>> +    description: GPIO used to control the state of the device.
> -gpios is the preferred form: shutdown-gpios

So the plural form of gpio is preferred even if the gpio is singular?  I 
would think gpio would be plural if this was an array of gpios.

I am waiting for the yaml to be accepted before adding this shutdown 
property to the driver.

Dan