[PATCH v2 0/3] pwm: lpc32xx: Add support to control PWM_PIN_LEVEL bit

[Vladimir Zapolskiy]

Hi Sylvain,

On 27.06.2016 16:09, Sylvain Lemieux wrote:
> From: Sylvain Lemieux <slemieux at tycoint.com>
> 
> The PWM_PIN_LEVEL bit is leave unset by the kernel PWM driver.
> 
> Prior to commit 08ee77b5a5de27ad63c92262ebcb4efe0da93b58,
> the PWM_PIN_LEVEL bit was always clear when the PWM was disable
> and a 0 logic level was apply to the output.
> 
> According to the LPC32x0 User Manual [1],
> the default value for bit 30 (PWM_PIN_LEVEL) is 0.
> 
> First patch:
> * initialize the pin level to 0 (default value) and update
>   the register value accordingly.
> 
> Second anf third patches:
> *  provide support to configure the pin output (i.e. PWM_PIN_LEVEL bit)
>    when the PWM is disabled.

a short question, how do you use PWM? Does it serve as a backlight
or something else?

> Note:
> * Follow this URL to access the discussion for version 1 of this
>   patch: http://thread.gmane.org/gmane.linux.pwm/3882
> 
> [1] http://www.nxp.com/documents/user_manual/UM10326.pdf
> 
> Sylvain Lemieux (3):
>   pwm: lpc32xx: Set PWM_PIN_LEVEL bit to default value
>   pwm: lpc32xx: Add support for PWM_PIN_LEVEL bit configuration
>   dt-bindings: pwm: lpc32xx: Add nxp,pwm-disabled-level-high property
> 
>  Documentation/devicetree/bindings/pwm/lpc32xx-pwm.txt |  3 +++
>  drivers/pwm/pwm-lpc32xx.c                             | 11 +++++++++++
>  2 files changed, 14 insertions(+)
> 

--
With best wishes,
Vladimir