linux-kernel - Re: [PATCH v11 2/2] mfd: max597x: Add support for MAX5970 and MAX5978

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Message-ID: <921915e5-6b36-9d2d-ebd7-632403e3086a@9elements.com>
Date:   Wed, 14 Dec 2022 14:10:08 +0530
From:   Naresh Solanki <naresh.solanki@...ements.com>
To:     Lee Jones <lee@...nel.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        Marcello Sylvester Bauer <sylv@...v.io>
Subject: Re: [PATCH v11 2/2] mfd: max597x: Add support for MAX5970 and MAX5978

Hi Lee

On 08-12-2022 05:53 pm, Lee Jones wrote:
> On Fri, 18 Nov 2022, Naresh Solanki wrote:
> 
>>
>>
>> On 17-11-2022 03:45 pm, Lee Jones wrote:
>>> On Wed, 16 Nov 2022, Naresh Solanki wrote:
>>>
>>>> From: Patrick Rudolph <patrick.rudolph@...ements.com>
>>>>
>>>> Implement a regulator driver with IRQ support for fault management.
>>>> Written against documentation [1] and [2] and tested on real hardware.
>>>>
>>>> Every channel has its own regulator supplies nammed 'vss1-supply' and
>>>> 'vss2-supply'. The regulator supply is used to determine the output
>>>> voltage, as the smart switch provides no output regulation.
>>>> The driver requires the 'shunt-resistor-micro-ohms' property to be
>>>> present in Device Tree to properly calculate current related
>>>> values.
>>>>
>>>> Datasheet links:
>>>> 1: https://datasheets.maximintegrated.com/en/ds/MAX5970.pdf
>>>> 2: https://datasheets.maximintegrated.com/en/ds/MAX5978.pdf
>>>>
>>>> Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
>>>> Co-developed-by: Marcello Sylvester Bauer <sylv@...v.io>
>>>> Signed-off-by: Marcello Sylvester Bauer <sylv@...v.io>
>>>> Co-developed-by: Naresh Solanki <Naresh.Solanki@...ements.com>
>>>> Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
>>>> ---
>>>>    drivers/mfd/Kconfig         |  12 +++++
>>>>    drivers/mfd/Makefile        |   1 +
>>>>    drivers/mfd/max597x.c       |  93 +++++++++++++++++++++++++++++++++
>>>>    include/linux/mfd/max597x.h | 101 ++++++++++++++++++++++++++++++++++++
>>>>    4 files changed, 207 insertions(+)
>>>>    create mode 100644 drivers/mfd/max597x.c
>>>>    create mode 100644 include/linux/mfd/max597x.h
>>>
>>> Ignoring my comments won't make them go away. :)
>>>
>>> Please tell me why you need a whole new driver, instead of adding
>>> support to simple-mfd-i2c?
>>>
>> I felt current implementation to be simpler, clearer & straight forward.
> 
> If you can make it work with simple-mfd-i2c, please do so.
simple-mfd-i2c doesn't has mechanism to pass device type(max5978 vs 
max5970).
> 
> No need to submit an entirely new driver for these simple use-cases.
> 
Regards,
Naresh