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From: Linus Walleij <linus.walleij@linaro.org>
To: "D, Lakshmi Sowjanya" <lakshmi.sowjanya.d@intel.com>,
	"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Lee Jones" <lee.jones@linaro.org>
Cc: "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Mark Gross <mgross@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	"Saha, Tamal" <tamal.saha@intel.com>,
	bala.senthil@intel.com, Dipen Patel <dipenp@nvidia.com>
Subject: Re: [RFC PATCH v1 10/20] tools: gpio: Add GPIO output generation user application
Date: Thu, 16 Sep 2021 23:52:18 +0200	[thread overview]
Message-ID: <CACRpkda5Y-Dxb4SkwyUcqKwsTd_c9Emgt0Z6OME5pQYz-WiC_Q@mail.gmail.com> (raw)
In-Reply-To: <20210824164801.28896-11-lakshmi.sowjanya.d@intel.com>

On Tue, Aug 24, 2021 at 6:48 PM <lakshmi.sowjanya.d@intel.com> wrote:

> From: Christopher Hall <christopher.s.hall@intel.com>
>
> Add GPIO user application - gpio_event_gen - to generate output using
> output methods added to GPIO lib. The output produced is 1 Hz clock
> aligned to the system clock using singly scheduled edges.
>
> gpio_event_gen accepts similar arguments to gpio-event-mon.
>
> Example output:
>         $ gpio-event-gen -n gpiochip0 -o 0 -c 3
>         Generating events on line 0 on gpiochip1
>         clock realtime : 1612453529996832765
>         GPIO EVENT TRIGGER: 1612453531000000000
>         clock realtime 2 2 : 1612453531500000000
>         GPIO EVENT TRIGGER: 1612453531500000000
>         clock realtime 2 2 : 1612453532000000000
>         GPIO EVENT TRIGGER: 1612453532000000000
>         clock realtime 2 2 : 1612453532500000000
>
> Produces 3 events of 1 Hz output on line 0 of chip/device 0.
>
> Signed-off-by: Christopher Hall <christopher.s.hall@intel.com>
> Signed-off-by: Tamal Saha <tamal.saha@intel.com>
> Co-developed-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
> Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
> Reviewed-by: Mark Gross <mgross@linux.intel.com>

To me this looks as very similar to what the PWM subsystem
is doing, just with a restricted number of periods.
Especially with that command line example.

Yours,
Linus Walleij

  reply	other threads:[~2021-09-16 21:52 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 16:47 [RFC PATCH v1 00/20] Review Request: Add support for Intel PMC lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 01/20] gpio: Add basic GPIO driver for Intel PMC Timed I/O device lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 02/20] gpio: Add GPIO polling interface to GPIO lib lakshmi.sowjanya.d
2021-09-22 10:03   ` Bartosz Golaszewski
2021-10-07  2:14     ` Kent Gibson
2021-08-24 16:47 ` [RFC PATCH v1 03/20] arch: x86: Add ART support function to tsc code lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 04/20] gpio: Add input code to Intel PMC Timed I/O Driver lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 05/20] tools: gpio: Add additional polling support to gpio-event-mon lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 06/20] gpio: Add set_input and polling interface to GPIO lib code lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 07/20] gpio: Add output event generation method to GPIOLIB and PMC Driver lakshmi.sowjanya.d
2021-09-16 21:42   ` Linus Walleij
2021-09-17  7:27     ` Uwe Kleine-König
2021-09-19 19:38       ` Linus Walleij
2021-09-19 21:21         ` Clemens Gruber
2021-09-20  7:14           ` Uwe Kleine-König
2021-08-24 16:47 ` [RFC PATCH v1 08/20] kernel: time: Add system time to system counter translation lakshmi.sowjanya.d
2021-09-16 21:48   ` Linus Walleij
2021-08-24 16:47 ` [RFC PATCH v1 09/20] arch: x86: Add TSC to ART translation lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 10/20] tools: gpio: Add GPIO output generation user application lakshmi.sowjanya.d
2021-09-16 21:52   ` Linus Walleij [this message]
2021-08-24 16:47 ` [RFC PATCH v1 11/20] gpio: Add event count interface to gpiolib lakshmi.sowjanya.d
2021-09-22  9:53   ` Bartosz Golaszewski
2021-08-24 16:47 ` [RFC PATCH v1 12/20] gpio: Add event count to Intel(R) PMC Timed I/O driver lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 13/20] tools: gpio: Add event count capability to event monitor application lakshmi.sowjanya.d
2021-09-16 21:57   ` Linus Walleij
2021-08-24 16:47 ` [RFC PATCH v1 14/20] arch/x86: Add ART nanosecond to ART conversion lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 15/20] pwm: Add capability for PWM Driver managed state lakshmi.sowjanya.d
2021-09-16 22:00   ` Linus Walleij
2021-08-24 16:47 ` [RFC PATCH v1 16/20] gpio: Add PWM capabilities to Intel(R) PMC TIO driver lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 17/20] pwm: Add second alignment to the core PWM interface lakshmi.sowjanya.d
2021-08-24 16:47 ` [RFC PATCH v1 18/20] gpio: Add PWM alignment support to the Intel(R) PMC Timed I/O driver lakshmi.sowjanya.d
2021-08-24 16:48 ` [RFC PATCH v1 19/20] gpio: Add GPIO monitor line to Intel(R) Timed I/O Driver lakshmi.sowjanya.d
2021-08-24 16:48 ` [RFC PATCH v1 20/20] tools: gpio: Add PWM monitor application lakshmi.sowjanya.d
2021-09-16 21:21 ` [RFC PATCH v1 00/20] Review Request: Add support for Intel PMC Linus Walleij
2021-10-11 21:14   ` Dipen Patel

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