From: Michal Simek <michal.simek@xilinx.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Michal Simek <michal.simek@xilinx.com>
Cc: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>,
"Linus Walleij" <linus.walleij@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-gpio@vger.kernel.org>, <git@xilinx.com>,
<saikrishna12468@gmail.com>
Subject: Re: [PATCH v4 3/3] pinctrl: Add Xilinx ZynqMP pinctrl driver support
Date: Wed, 24 Mar 2021 10:02:53 +0100 [thread overview]
Message-ID: <dabcfe43-568a-66c1-642e-eef065f9b5ab@xilinx.com> (raw)
In-Reply-To: <YFr9GqNmYuEG2OvZ@kroah.com>
On 3/24/21 9:49 AM, Greg Kroah-Hartman wrote:
> On Wed, Mar 24, 2021 at 09:29:12AM +0100, Michal Simek wrote:
>> On 3/23/21 2:42 PM, Greg Kroah-Hartman wrote:
>>> On Wed, Mar 17, 2021 at 01:55:16PM +0530, Sai Krishna Potthuri wrote:
>>>> Adding pinctrl driver for Xilinx ZynqMP platform.
>>>> This driver queries pin information from firmware and registers
>>>> pin control accordingly.
>>>>
>>>> Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
>>>> ---
>>>> drivers/pinctrl/Kconfig | 13 +
>>>> drivers/pinctrl/Makefile | 1 +
>>>> drivers/pinctrl/pinctrl-zynqmp.c | 1030 ++++++++++++++++++++++++++++++
>>>> 3 files changed, 1044 insertions(+)
>>>> create mode 100644 drivers/pinctrl/pinctrl-zynqmp.c
>>>>
>>>> diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
>>>> index 815095326e2d..25d3c7208975 100644
>>>> --- a/drivers/pinctrl/Kconfig
>>>> +++ b/drivers/pinctrl/Kconfig
>>>> @@ -341,6 +341,19 @@ config PINCTRL_ZYNQ
>>>> help
>>>> This selects the pinctrl driver for Xilinx Zynq.
>>>>
>>>> +config PINCTRL_ZYNQMP
>>>> + bool "Pinctrl driver for Xilinx ZynqMP"
>>>
>>> Please make this work as a module.
>>
>> The most of pinctrl drivers are builtin modules now which is not excuse
>> it is just fact.
>> $ git grep module_pla drivers/pinctrl/ | wc -l
>> 40
>> $ git grep builtin_pla drivers/pinctrl/ | wc -l
>> 64
>
> For new ones, we can do better, don't make us have to go back and fix
> this up later.
As I said not a big deal. If this is the way to go then I these rules
should be followed which is not what it is happening based on 3 latest
pinctrl drivers below.
>
>> Also at least last 3 pinctrl drivers which have been merged are not modules.
>> d4c34d09ab03 ("pinctrl: Add RISC-V Canaan Kendryte K210 FPIOA driver")
>> 7e5ea974e61c ("pinctrl: pinctrl-microchip-sgpio: Add pinctrl driver for
>> Microsemi Serial GPIO")
>> a68a7844264e ("pinctrl: visconti: Add Toshiba Visconti SoCs pinctrl
>> support")
>>
>> None is saying that it can't be done but that cases where you use
>> pinctrl as module are really very limited. When you start to use pinctrl
>> and its functionality you need to have it as the part of the kernel to
>> be to get console, mmc, ethernet, usb, etc.
>>
>> That's why I would like to know what functionality and use case you have
>> in mind that this driver should be made module.
>
> The "functionality" of building a kernel image that works on all
> hardware types. Just like x86-64 has been for a very long time :)
ok.
Thanks,
Michal
next prev parent reply other threads:[~2021-03-24 9:06 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 8:25 [PATCH v4 0/3] Add ZynqMP pinctrl driver Sai Krishna Potthuri
2021-03-17 8:25 ` [PATCH v4 1/3] firmware: xilinx: Add pinctrl support Sai Krishna Potthuri
2021-03-17 8:25 ` [PATCH v4 2/3] dt-bindings: pinctrl: Add binding for ZynqMP pinctrl driver Sai Krishna Potthuri
2021-03-25 9:00 ` Linus Walleij
2021-03-17 8:25 ` [PATCH v4 3/3] pinctrl: Add Xilinx ZynqMP pinctrl driver support Sai Krishna Potthuri
2021-03-17 12:55 ` Andy Shevchenko
2021-03-18 14:42 ` Sai Krishna Potthuri
2021-03-19 10:23 ` Andy Shevchenko
2021-03-22 15:25 ` Sai Krishna Potthuri
2021-03-22 17:16 ` Andy Shevchenko
2021-03-23 8:08 ` Sai Krishna Potthuri
2021-03-25 8:57 ` Linus Walleij
2021-03-25 10:15 ` Sai Krishna Potthuri
2021-03-23 13:42 ` Greg Kroah-Hartman
2021-03-24 8:29 ` Michal Simek
2021-03-24 8:49 ` Greg Kroah-Hartman
2021-03-24 9:02 ` Michal Simek [this message]
2021-03-24 9:13 ` Greg Kroah-Hartman
2021-03-24 9:16 ` Michal Simek
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