linux-kernel - Re: [PATCH v2 0/3] Introduce the ACCES IDIO-16 GPIO library module

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Message-ID: <CAMRc=McQa0iDS+6OCOt9R1B-DdR7t1jD3D-Q3DTKbm=zidXpAQ@mail.gmail.com>
Date:   Thu, 20 Oct 2022 14:10:58 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     William Breathitt Gray <william.gray@...aro.org>
Cc:     linus.walleij@...aro.org, linux-kernel@...r.kernel.org,
        andriy.shevchenko@...el.com, linux-gpio@...r.kernel.org
Subject: Re: [PATCH v2 0/3] Introduce the ACCES IDIO-16 GPIO library module

On Sun, Sep 18, 2022 at 9:54 PM William Breathitt Gray
<william.gray@...aro.org> wrote:
>
> Changes in v2:
>  - Added offset check for last byte of inputs in idio_16_get() for
>    robustness
>  - Replaced hardcoded '16' with IDIO_16_NOUT constant in idio_16_get*()
>  - Renamed IDIO_16 namespace to GPIO_IDIO_16; adjusted 104-idio-16 and
>    pci-idio-16 drivers accordingly
>  - Utilized DEFAULT_SYMBOL_NAMESPACE to simplify namespace exports
>  - Refactored callbacks to utilize cached output states; idio_16_get()
>    callback now requires struct idio_16_state state; adjusted
>    104-idio-16 and pci-idio-16 drivers accordingly
>  - Moved bitmap_fill() to after idio_16_state_init() in idio_16_probe()
>    to prevent clobbering out_state if the implementation of
>    idio_16_state_init changes in the future
>  - Adjusted offset checks in idio_16_set() and idio_16_get_direction()
>    to ">= IDIO_16_NOUT" for consistency
>  - Utilized __assign_bit() in idio_16_set()
>  - Refactored idio_16_*_multiple() callbacks to utilize bitmap_replace()
>
> In a similar vein as the Intel 8255 interface library module [0], the
> ACCES IDIO-16 GPIO library module is introduced to consolidate much of
> the shared code between the existing 104-IDIO-16 and PCI-IDIO-16 GPIO
> drivers.
>
> The idio-16 module exposes consumer library functions to facilitate
> communication with devices within the ACCES IDIO-16 family such as the
> 104-IDIO-16 and the PCI-IDIO-16.
>
> A CONFIG_GPIO_IDIO_16 Kconfig option is introduced by this patch.
> Modules wanting access to these idio-16 library functions should select
> this Kconfig option and import the GPIO_IDIO_16 symbol namespace.
>
> [0] https://lore.kernel.org/all/d1a24895f2ea67f689c24c34a20ddb43cd7246af.1658324498.git.william.gray@linaro.org/
>
> William Breathitt Gray (3):
>   gpio: idio-16: Introduce the ACCES IDIO-16 GPIO library module
>   gpio: 104-idio-16: Utilize the idio-16 GPIO library
>   gpio: pci-idio-16: Utilize the idio-16 GPIO library
>
>  MAINTAINERS                     |   7 ++
>  drivers/gpio/Kconfig            |  11 +++
>  drivers/gpio/Makefile           |   1 +
>  drivers/gpio/gpio-104-idio-16.c |  88 ++++---------------
>  drivers/gpio/gpio-idio-16.c     | 146 ++++++++++++++++++++++++++++++++
>  drivers/gpio/gpio-idio-16.h     |  71 ++++++++++++++++
>  drivers/gpio/gpio-pci-idio-16.c | 119 +++-----------------------
>  7 files changed, 265 insertions(+), 178 deletions(-)
>  create mode 100644 drivers/gpio/gpio-idio-16.c
>  create mode 100644 drivers/gpio/gpio-idio-16.h
>
>
> base-commit: d9e7f0e320516c660d6f33e6c16a3d99970eb14e
> --
> 2.37.3
>

This series looks good to me, Andy do you have any objections?
Otherwise, I'll queue it soon.

Bartosz