[v5,0/3] Add PM support to STM32 LP Timer drivers
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  • Add PM support to STM32 LP Timer drivers
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Fabrice Gasnier Feb. 20, 2019, 1:07 p.m. UTC
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

---
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(-)

Comments

Fabrice Gasnier March 18, 2019, 2:35 p.m. UTC | #1
On 2/20/19 2:07 PM, 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,

Gentle reminder to review changes I've made in v5.

Thanks in advance,
Best Regards,
Fabrice

> 
> ---
> 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(-)
>