linux-kernel - Re: [RFC PATCH 3/7] dt-bindings: pwm: add normal PWM polarity flag

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Message-ID: <20200317213627.i2w5a7togr5gh6co@pengutronix.de>
Date:   Tue, 17 Mar 2020 22:36:28 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
Cc:     devicetree@...r.kernel.org, linux-pwm@...r.kernel.org,
        Paul Barker <pbarker@...sulko.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Igor Opaniuk <igor.opaniuk@...adex.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 3/7] dt-bindings: pwm: add normal PWM polarity flag

On Tue, Mar 17, 2020 at 02:32:27PM +0200, Oleksandr Suvorov wrote:
> PWM can have a normal polarity and a reverted one. The reverted polarity
> value is defined.
> Define the PWM_POLARITY_NORMAL to be used further.
> 
> Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
> ---
> 
>  include/dt-bindings/pwm/pwm.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/dt-bindings/pwm/pwm.h b/include/dt-bindings/pwm/pwm.h
> index ab9a077e3c7d..6b58caa6385e 100644
> --- a/include/dt-bindings/pwm/pwm.h
> +++ b/include/dt-bindings/pwm/pwm.h
> @@ -10,6 +10,7 @@
>  #ifndef _DT_BINDINGS_PWM_PWM_H
>  #define _DT_BINDINGS_PWM_PWM_H
>  
> +#define PWM_POLARITY_NORMAL			0
>  #define PWM_POLARITY_INVERTED			(1 << 0)

Maybe define PWM_POLARITY_NORMAL as (0 << 0) to make it more obvious
that it is the inverse of PWM_POLARITY_INVERTED?

But even when kept as is I like hafing PWM_POLARITY_NORMAL in the
binding definitions.

Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |