linux-kernel - Re: [RESEND PATCH v5 0/3] Add PM support to STM32 LP Timer drivers

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Message-ID: <45e934af-d677-d7d4-09ea-3ed01872dab6@st.com>
Date:   Fri, 10 May 2019 09:51:01 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     <thierry.reding@...il.com>
CC:     <robh+dt@...nel.org>, <u.kleine-koenig@...gutronix.de>,
        <tduszyns@...il.com>, <mark.rutland@....com>,
        <alexandre.torgue@...com>, <mcoquelin.stm32@...il.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pwm@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Loic PALLARDY <loic.pallardy@...com>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [RESEND PATCH v5 0/3] Add PM support to STM32 LP Timer drivers

On 4/18/19 11:37 AM, Fabrice Gasnier wrote:
> This patch series adds power management support for STM32 LP Timer:
> - PWM driver
> - Document the pinctrl states for sleep mode
> 
> It also adds device link between the PWM consumer and the PWM provider.
> This allows proper sequencing for suspend/resume (e.g. user will likely
> do a pwm_disable() before the PWM provider suspend executes), see [1].
> 
> [1] https://lkml.org/lkml/2019/2/5/770
> 

Hi Thierry,

Please let me know if you have some more comments on this series. It's
been under review since quite some time now.

Thanks in advance,
Best Regards,
Fabrice

> ---
> resend v5:
> - update collected acks
> 
> Changes in v5:
> - improve a warning message, fix a style issue.
> 
> Changes in v4:
> - improve error handling when adding the PWM consumer device link.
> 
> Changes in v3:
> - Move the device_link_add() call to of_pwm_get() as discussed with Uwe.
> 
> Changes in v2:
> - Don't disable PWM channel in PWM provider: rather refuse to suspend
>   and report an error as suggested by Uwe and Thierry.
> - Add patch 3/3 to propose device link addition.
> - No updates for STM32 LP Timer IIO driver. Patches can be send separately.
> 
> Fabrice Gasnier (3):
>   dt-bindings: pwm-stm32-lp: document pinctrl sleep state
>   pwm: stm32-lp: Add power management support
>   pwm: core: add consumer device link
> 
>  .../devicetree/bindings/pwm/pwm-stm32-lp.txt       |  9 ++--
>  drivers/pwm/core.c                                 | 50 ++++++++++++++++++++--
>  drivers/pwm/pwm-stm32-lp.c                         | 25 +++++++++++
>  include/linux/pwm.h                                |  6 ++-
>  4 files changed, 82 insertions(+), 8 deletions(-)
>