[PATCH v3 RESEND 00/11] pwm: imx: Provide atomic operation for IMX PWM driver

From: Lukasz Majewski <l.majewski@majess.pl>
To: Thierry Reding <thierry.reding@gmail.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Stefan Agner <stefan@agner.ch>,
	linux-pwm@vger.kernel.org,
	Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>,
	linux-kernel@vger.kernel.org
Cc: Fabio Estevam <fabio.estevam@nxp.com>,
	Fabio Estevam <festevam@gmail.com>,
	Boris Brezillon <boris.brezillon@free-electrons.com>,
	Lothar Wassmann <LW@karo-electronics.de>,
	kernel@pengutronix.de, Lukasz Majewski <l.majewski@majess.pl>
Subject: [PATCH v3 RESEND 00/11] pwm: imx: Provide atomic operation for IMX PWM driver
Date: Mon, 26 Dec 2016 23:55:50 +0100	[thread overview]
Message-ID: <1482792961-12702-1-git-send-email-l.majewski@majess.pl> (raw)
In-Reply-To: <1477259146-19167-1-git-send-email-l.majewski@majess.pl>

This patch set brings atomic operation to i.MX's PWMv2 driver.

This work has been supported and suggested by Boris Brezillon [1] and 
Stefan Agner, by showing how simple the transition could be :-).

It has been divided into several steps:

- Remove ipg clock enable/disable code (as proposed by Sascha Hauer) - this
  is the most notable change for v3

- Provide different pwm ops for PWMv1 and PWMv2

- Separate PWMv1 commits from "generic" and non atomic PWM code

  NOTE: Since I do _not_ have board with PWMv1, I would like to ask somebody
        for testing

- Move some imx_config_v2 code to separate functions

- Provide PWM atomic implementation (the ->apply() driver) for PWMv2 in a
  single patch for better readability.

- Remove redundant PWM code (disable, enable, config callbacks)

- Update proper documentation entries

- Provide support for polarity inversion on top of atomic PWM rework

Test HW:
--------
This patch set has been tested on i.MX6q board with
v4.9 vanila kernel SHA1: 69973b830859bc6529a7a0468ba0d80ee5117826

The PWM operation has been tested with pwm_bl backlight driver by changing
its brightness.

[1]: http://patchwork.ozlabs.org/patch/685402/

Lothar Wassmann (2):
  pwm: print error messages with pr_err() instead of pr_debug()
  pwm: core: make the PWM_POLARITY flag in DTB optional

Lukasz Majewski (8):
  pwm: imx: Add separate set of pwm ops for PWMv1 and PWMv2
  pwm: imx: Rewrite imx_pwm_*_v1 code to facilitate switch to atomic pwm
    operation
  pwm: imx: Move PWMv2 software reset code to a separate function
  pwm: imx: Move PWMv2 wait for fifo slot code to a separate function
  pwm: imx: Provide atomic PWM support for i.MX PWMv2
  pwm: imx: Remove redundant i.MX PWMv2 code
  pwm: imx: doc: Update imx-pwm.txt documentation entry
  pwm: imx: Add polarity inversion support to i.MX's PWMv2

Sascha Hauer (1):
  pwm: imx: remove ipg clock

 Documentation/devicetree/bindings/pwm/imx-pwm.txt |   6 +-
 drivers/pwm/core.c                                |  26 +--
 drivers/pwm/pwm-imx.c                             | 247 ++++++++++------------
 3 files changed, 134 insertions(+), 145 deletions(-)

-- 
2.1.4