linux-kernel - Re: [PATCH v3 00/11] pwm: imx: Provide atomic operation for IMX PWM driver

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Date:   Tue, 8 Nov 2016 23:24:20 +0100
From:   Lukasz Majewski <l.majewski@...ess.pl>
To:     Thierry Reding <thierry.reding@...il.com>,
        Stefan Agner <stefan@...er.ch>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:     linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Fabio Estevam <fabio.estevam@....com>,
        Fabio Estevam <festevam@...il.com>,
        Lothar Wassmann <LW@...o-electronics.de>,
        Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>,
        kernel@...gutronix.de
Subject: Re: [PATCH v3 00/11] pwm: imx: Provide atomic operation for IMX PWM
 driver

Dear All,

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

Are there any more comments regarding this patch set?

Best regards,
Łukasz Majewski

> 
> 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-rc3 kernel SHA1: a909d3e636995ba7c349e2ca5dbb528154d4ac30
> 
> 
> 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(-)
> 


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