linux-kernel - Re: [RFC PATCH 0/3] pwm: omap: Add PWM support using dual-mode timers

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Date:	Mon, 19 Oct 2015 12:46:55 +1100
From:	Neil Brown <neilb@...e.de>
To:	Neil Armstrong <narmstrong@...libre.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Tony Lindgren <tony@...mide.com>, linux-pwm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org, Grant Erickson <marathon96@...il.com>,
	Joachim Eastwood <manabian@...il.com>
Subject: Re: [RFC PATCH 0/3] pwm: omap: Add PWM support using dual-mode timers

Neil Armstrong <narmstrong@...libre.com> writes:

> This patch is based on an earlier patch by NeilBrown which is based on
> a older patch from Grant Erickson which provided PWM devices using
> the 'legacy' interface.
>
> The pwm driver was renamed to not be confused with the OMAP4 PWM dedicated
> hardware and was cleaned with the review from Thierry Reding.
>
> The first patch introduces a way to select to dmtimer clock source via a
> clocks binding and a dedicated function wit the legacy fallback.
>
> In order to prepare for the future form of the dmtimer (clksource or whatever)
> the first patch introduces the PWM driver with all the dmtimer calls into a
> platform data structure.
>
> The structure is then filled in plat-omap and added as auxdata for the
> ti,pwm-dmtimer-omap compatible nodes.
>
> Cc: Grant Erickson <marathon96@...il.com>
> Cc: NeilBrown <neilb@...e.de>
> Cc: Joachim Eastwood <manabian@...il.com>
> Suggested-by: Tony Lindgren <tony@...mide.com>
>
> Neil Armstrong (3):
>   arm: plat-omap: dmtimer: Add clock source from DT
>   pwm: Add PWM driver for OMAP using dual-mode timers
>   arm: plat-omap: Add PWM dmtimer platforma data quirks
>
>  .../devicetree/bindings/pwm/pwm-omap-dmtimer.txt   |  18 ++
>  arch/arm/mach-omap2/pdata-quirks.c                 |  23 ++
>  arch/arm/plat-omap/dmtimer.c                       |  32 +-
>  drivers/pwm/Kconfig                                |   9 +
>  drivers/pwm/Makefile                               |   1 +
>  drivers/pwm/pwm-omap-dmtimer.c                     | 322 +++++++++++++++++++++
>  include/linux/platform_data/pwm_omap_dmtimer.h     |  69 +++++
>  7 files changed, 472 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pwm/pwm-omap-dmtimer.txt
>  create mode 100644 drivers/pwm/pwm-omap-dmtimer.c
>  create mode 100644 include/linux/platform_data/pwm_omap_dmtimer.h
>

Thanks for much for doing this!
I haven't looked and wont have a chance for a least a couple of weeks,
but I'm very encouraged that someone is pursuing it.

Thanks,
NeilBrown

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