linux-kernel - Re: [PATCH v8 0/2] add support for GPIO or IRQ based event counter

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Message-ID: <20210314165504.536d9ba6@archlinux>
Date:   Sun, 14 Mar 2021 16:55:04 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        David Jander <david@...tonic.nl>,
        Robin van der Gracht <robin@...tonic.nl>,
        linux-iio@...r.kernel.org, Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v8 0/2] add support for GPIO or IRQ based event counter

On Mon,  1 Mar 2021 09:03:59 +0100
Oleksij Rempel <o.rempel@...gutronix.de> wrote:

> changes v8:
> - use use enum index instead of enum value for the counter function
> - register signal unconditionally and return error is signal revel is
>   read 
> 
> changes v7:
> - make most of structs dynamically allocatable to assign IRQ based
>   description to the signal
> - assign dev name instead for driver name to the IRQ
> 
> changes v6:
> - rename it to interrupt-counter
> - driver fixes
> - device tree fixes
> 
> changes v5:
> - rename it to event counter, since it support different event sources
> - make it work with gpio-only or irq-only configuration
> - update yaml binding
> 
> changes v4:
> - use IRQ_NOAUTOEN to not enable IRQ by default
> - rename gpio_ from name pattern and make this driver work any IRQ
>   source.
> 
> changes v3:
> - convert counter to atomic_t
> 
> changes v2:
> - add commas
> - avoid possible unhandled interrupts in the enable path
> - do not use of_ specific gpio functions
> 
> Add support for GPIO based pulse counter. For now it can only count
> pulses. With counter char device support, we will be able to attach
> timestamps and measure actual pulse frequency.
> 
> Never the less, it is better to mainline this driver now (before chardev
> patches go mainline), to provide developers additional use case for the counter
> framework with chardev support.
> 
> Oleksij Rempel (2):
>   dt-bindings: counter: add interrupt-counter binding
>   counter: add IRQ or GPIO based counter

Series applied to the togreg branch of iio.git and pushed out as testing.

thanks,

Jonathan

> 
>  .../bindings/counter/interrupt-counter.yaml   |  62 +++++
>  MAINTAINERS                                   |   7 +
>  drivers/counter/Kconfig                       |  10 +
>  drivers/counter/Makefile                      |   1 +
>  drivers/counter/interrupt-cnt.c               | 244 ++++++++++++++++++
>  5 files changed, 324 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/counter/interrupt-counter.yaml
>  create mode 100644 drivers/counter/interrupt-cnt.c
>