linux-kernel - [PATCHv2 resend 00/11] improve PWM lookup support without device tree

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Date:	Mon, 19 May 2014 22:42:31 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Tony Lindgren <tony@...mide.com>,
	Philipp Zabel <philipp.zabel@...il.com>,
	Paul Parsons <lost.distance@...oo.com>,
	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Bryan Wu <cooloney@...il.com>,
	Jingoo Han <jg1.han@...sung.com>,
	Lee Jones <lee.jones@...aro.org>, linux-pwm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org, linux-sh@...r.kernel.org,
	linux-leds@...r.kernel.org, linux-fbdev@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCHv2 resend 00/11] improve PWM lookup support without device tree

Hi,

Originally sent on Apr 14th, note that this series is blocking another 16
patches series, I would like it to be taken in 3.16 if we can agree on this
implementation.

A patch set as suggested by Thierry to make lookup with the lookup table
instead of device tree behave more like when using device tree.

The first patch adds a period and a polarity member to the lookup table and use
those to set period and polarity.

Patch 2, 4 and 5 are making use of those new members from the board files.
Patch 3 removes useless code since setting the polarity is now handled by the
PWM core.

I couldn't decide on a good name for the extended PWM_LOOKUP macro and I believe
we won't have to add members to that structure soon so:
Patch 6 modifies the PWM_LOOKUP macro to also initialize period and polarity
and
Patch 7-9 are making use of the new PWM_LOOKUP macro in the board files

Patch 10 and 11 are making the leds-pwm and pwm_bl drivers get the period from
the PWM before using pwm_period_ns if it is not already set.

Patch 10 will obviously conflict with the series of Russell reworking the
leds-pwm probing. I can rebase if necessary

The final goal would be to get rid of .pwm_period_ns in leds-pwm and pwm_bl
after moving all the remaining users (still around 25) to pwm_lookup.

Changes in v2:
 - correctly unlock the pwm_lookup_lock mutex before returning.
 - don't change PWM_LOOKUP atomically
 - remove tpu_pwm_platform_data and the associated header file
 - make the leds-pwm and pwm_bl drivers get the period from the PWM

Alexandre Belloni (11):
  pwm: add period and polarity to struct pwm_lookup
  ARM: shmobile: Armadillo 800 EVA: initialize all struct pwm_lookup
    members
  pwm: renesas-tpu: remove useless struct tpu_pwm_platform_data
  ARM: OMAP3: Beagle: initialize all the struct pwm_lookup members
  ARM: pxa: hx4700: initialize all the struct pwm_lookup members
  pwm: modify PWM_LOOKUP to initialize all struct pwm_lookup members
  ARM: OMAP3: Beagle: use PWM_LOOKUP to initialize struct pwm_lookup
  ARM: shmobile: Armadillo 800 EVA: use PWM_LOOKUP to initialize struct
    pwm_lookup
  ARM: pxa: hx4700: use PWM_LOOKUP to initialize struct pwm_lookup
  leds: leds-pwm: retrieve configured pwm period
  backlight: pwm_bl: retrieve configured pwm period

 Documentation/pwm.txt                          |  3 ++-
 arch/arm/mach-omap2/board-omap3beagle.c        |  3 ++-
 arch/arm/mach-pxa/hx4700.c                     |  3 ++-
 arch/arm/mach-shmobile/board-armadillo800eva.c | 14 +++-----------
 drivers/leds/leds-pwm.c                        |  5 ++++-
 drivers/pwm/core.c                             |  8 +++++++-
 drivers/pwm/pwm-renesas-tpu.c                  | 19 +++----------------
 drivers/video/backlight/pwm_bl.c               |  8 +++++---
 include/linux/platform_data/pwm-renesas-tpu.h  | 16 ----------------
 include/linux/pwm.h                            |  6 +++++-
 10 files changed, 33 insertions(+), 52 deletions(-)
 delete mode 100644 include/linux/platform_data/pwm-renesas-tpu.h

-- 
1.9.1

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