linux-kernel - Re: [PATCH v2 2/3] pinctrl: meson: Add driver support for Amlogic A4 SoCs

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Message-ID: <9c7f0c20-aafe-45b2-aa3e-c2c21e3a5b71@kernel.org>
Date: Tue, 15 Oct 2024 09:59:53 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Xianwei Zhao <xianwei.zhao@...ogic.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Neil Armstrong <neil.armstrong@...aro.org>,
 Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>,
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
 Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] pinctrl: meson: Add driver support for Amlogic A4
 SoCs

On 15/10/2024 09:54, Xianwei Zhao wrote:
> Hi Krzysztof,
>      Thanks for your reply.
> 
> On 2024/10/15 14:01, Krzysztof Kozlowski wrote:
>> [ EXTERNAL EMAIL ]
>>
>> On Mon, Oct 14, 2024 at 05:05:52PM +0800, Xianwei Zhao wrote:
>>> Add a new pinctrl driver for Amlogic A4 SoCs which share
>>> the same register layout as the previous Amlogic S4.
>>>
>>> Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
>>> ---
>>>   drivers/pinctrl/meson/Kconfig              |    6 +
>>>   drivers/pinctrl/meson/Makefile             |    1 +
>>>   drivers/pinctrl/meson/pinctrl-amlogic-a4.c | 1176 ++++++++++++++++++++++++++++
>>>   3 files changed, 1183 insertions(+)
>>>
>>> diff --git a/drivers/pinctrl/meson/Kconfig b/drivers/pinctrl/meson/Kconfig
>>> index cc397896762c..3e90bb5ec442 100644
>>> --- a/drivers/pinctrl/meson/Kconfig
>>> +++ b/drivers/pinctrl/meson/Kconfig
>>> @@ -67,6 +67,12 @@ config PINCTRL_MESON_S4
>>>        select PINCTRL_MESON_AXG_PMX
>>>        default y
>>>
>>> +config PINCTRL_AMLOGIC_A4
>>> +     tristate "Amlogic A4 SoC pinctrl driver"
>>> +     depends on ARM64
>>> +     select PINCTRL_MESON_AXG_PMX
>>> +     default y
>>> +
>>>   config PINCTRL_AMLOGIC_C3
>>>        tristate "Amlogic C3 SoC pinctrl driver"
>>>        depends on ARM64
>>> diff --git a/drivers/pinctrl/meson/Makefile b/drivers/pinctrl/meson/Makefile
>>> index 9e538b9ffb9b..c92a65a83344 100644
>>> --- a/drivers/pinctrl/meson/Makefile
>>> +++ b/drivers/pinctrl/meson/Makefile
>>> @@ -10,5 +10,6 @@ obj-$(CONFIG_PINCTRL_MESON_AXG) += pinctrl-meson-axg.o
>>>   obj-$(CONFIG_PINCTRL_MESON_G12A) += pinctrl-meson-g12a.o
>>>   obj-$(CONFIG_PINCTRL_MESON_A1) += pinctrl-meson-a1.o
>>>   obj-$(CONFIG_PINCTRL_MESON_S4) += pinctrl-meson-s4.o
>>> +obj-$(CONFIG_PINCTRL_AMLOGIC_A4) += pinctrl-amlogic-a4.o
>>>   obj-$(CONFIG_PINCTRL_AMLOGIC_C3) += pinctrl-amlogic-c3.o
>>>   obj-$(CONFIG_PINCTRL_AMLOGIC_T7) += pinctrl-amlogic-t7.o
>>> diff --git a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
>>> new file mode 100644
>>> index 000000000000..dee1ae43edb5
>>> --- /dev/null
>>> +++ b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
>>> @@ -0,0 +1,1176 @@
>>> +// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
>>> +/*
>>> + * Pin controller and GPIO driver for Amlogic A4 SoC.
>>> + *
>>> + * Copyright (c) 2024 Amlogic, Inc. All rights reserved.
>>> + * Author: Xianwei Zhao <xianwei.zhao@...ogic.com>
>>> + *         Huqiang Qin <huqiang.qin@...ogic.com>
>>> + */
>>> +
>>> +#include <dt-bindings/gpio/amlogic-a4-gpio.h>
>>
>> I do not see any usage of it.
>>
> 
> The header file "amlogic-a4-gpio.h"  is used by AMLOGIC_PIN and 
> GPIO_GROUP_V2, The code used  is  AMLOGIC_GPIO().
> This is binding definition.

Then all other defines are not used. AMLOGIC_GPIO is not used by DTS, so
how is that a binding? Don't stuff random defines into the bindings.

Best regards,
Krzysztof