linux-kernel - Re: [PATCH 3/6] gpio: Add Delta TN48M CPLD GPIO driver

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Date:   Thu, 06 May 2021 18:40:37 +0200
From:   Michael Walle <michael@...le.cc>
To:     Rob Herring <robh@...nel.org>
Cc:     Robert Marko <robert.marko@...tura.hr>, lee.jones@...aro.org,
        linus.walleij@...aro.org, bgolaszewski@...libre.com,
        jdelvare@...e.com, linux@...ck-us.net, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-hwmon@...r.kernel.org, luka.perkov@...tura.hr,
        jmp@...phyte.org, pmenzel@...gen.mpg.de, buczek@...gen.mpg.de
Subject: Re: [PATCH 3/6] gpio: Add Delta TN48M CPLD GPIO driver

Am 2021-05-06 16:00, schrieb Rob Herring:
> On Fri, Apr 30, 2021 at 02:35:08PM +0200, Robert Marko wrote:
>> Delta TN48M CPLD is used as a GPIO expander for the SFP GPIOs.
>> 
>> It is a mix of input only and output only pins.
>> 
>> Since there is no logical GPIO numbering arbitrary one is used
>> along dt-bindings to make it humanly readable.
>> 
>> Signed-off-by: Robert Marko <robert.marko@...tura.hr>
>> ---
>>  drivers/gpio/Kconfig      |  12 +++
>>  drivers/gpio/Makefile     |   1 +
>>  drivers/gpio/gpio-tn48m.c | 191 
>> ++++++++++++++++++++++++++++++++++++++
>>  drivers/mfd/tn48m-cpld.c  |   6 +-
>>  include/linux/mfd/tn48m.h |   3 +
>>  5 files changed, 212 insertions(+), 1 deletion(-)
>>  create mode 100644 drivers/gpio/gpio-tn48m.c
> 
> 
>> +static const struct platform_device_id tn48m_gpio_id_table[] = {
>> +	{ "delta,tn48m-gpio", },
> 
> Looks like a compatible, but is not. I think you can drop this and just
> use 'tm48m-gpio' (the driver name).

I'm just curious, why isn't the vendor included here (as there
might be a chance for name clashes in the future).

-michael