linux-kernel - Re: [PATCH v10 1/6] dt-bindings: mfd: add document bindings for mp2629

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Date:   Sat, 18 Apr 2020 17:01:17 +0200
From:   saravanan sekar <sravanhome@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     lee.jones@...aro.org, andy.shevchenko@...il.com,
        robh+dt@...nel.org, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net, sre@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v10 1/6] dt-bindings: mfd: add document bindings for
 mp2629

Hi Jonathan,

On 18/04/20 4:53 pm, Jonathan Cameron wrote:
> On Fri, 17 Apr 2020 10:49:58 +0200
> Saravanan Sekar <sravanhome@...il.com> wrote:
>
>> Add device tree binding information for mp2629 mfd driver.
>>
>> Signed-off-by: Saravanan Sekar <sravanhome@...il.com>
>> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
>> ---
>>   .../devicetree/bindings/mfd/mps,mp2629.yaml   | 61 +++++++++++++++++++
>>   1 file changed, 61 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/mps,mp2629.yaml b/Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
>> new file mode 100644
>> index 000000000000..b25b29259d67
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
>> @@ -0,0 +1,61 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/mps,mp2629.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: MP2629 Battery Charger PMIC from Monolithic Power System.
>> +
>> +maintainers:
>> +  - Saravanan Sekar <sravanhome@...il.com>
>> +
>> +description: |
>> +  MP2629 is a PMIC providing battery charging and power supply for smartphones,
>> +  wireless camera and portable devices. Chip is controlled over I2C.
>> +
>> +  The battery charge management device handles battery charger controller and
>> +  ADC IIO device for battery, system voltage
>> +
>> +properties:
>> +  compatible:
>> +    const: mps,mp2629
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  interrupt-controller: true
>> +
>> +  "#interrupt-cells":
>> +    const: 2
>> +    description:
>> +      The first cell is the IRQ number, the second cell is the trigger type.
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupts
>> +  - interrupt-controller
>> +  - "#interrupt-cells"
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/interrupt-controller/irq.h>
>> +    #include <dt-bindings/input/linux-event-codes.h>
>> +    i2c@...05000 {
> I thought the general trend for i2c devices was to leave the i2c
> part 'vague'.
>
>      i2c {
>            #address-cells = <1>;
>            #size-cells = <0>;
>           
>            pmic@.... etc
I agree with you and initial patch was as like above, but Lee was 
somehow unhappy and not satisfied with

my explanations. Please find more info on v4.

> Guess it doesn't matter if example contains too much information. Rob?
>
> Otherwise looks good to me.
>
> Thanks,
>
> Jonathan
>   
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +        reg = <0x7e205000 0x200>;
>> +
>> +        pmic@4b {
>> +            compatible = "mps,mp2629";
>> +            reg = <0x4b>;
>> +
>> +            interrupt-controller;
>> +            interrupt-parent = <&gpio2>;
>> +            #interrupt-cells = <2>;
>> +            interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
>> +        };
>> +    };