linux-kernel - Re: [PATCH v4] pwm: bcm2835: Support apply function for atomic configuration

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Message-ID: <X9JZEohJLGiT42lu@ulmo>
Date:   Thu, 10 Dec 2020 18:21:22 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Lino Sanfilippo <LinoSanfilippo@....de>
Cc:     u.kleine-koenig@...gutronix.de, lee.jones@...aro.org,
        nsaenzjulienne@...e.de, f.fainelli@...il.com, rjui@...adcom.com,
        sean@...s.org, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, linux-pwm@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] pwm: bcm2835: Support apply function for atomic
 configuration

On Wed, Dec 09, 2020 at 09:48:25PM +0100, Lino Sanfilippo wrote:
> Use the newer .apply function of pwm_ops instead of .config, .enable,
> .disable and .set_polarity. This guarantees atomic changes of the pwm
> controller configuration. It also reduces the size of the driver.
> 
> Since now period is a 64 bit value, add an extra check to reject periods
> that exceed the possible max value for the 32 bit register.
> 
> This has been tested on a Raspberry PI 4.
> 
> Signed-off-by: Lino Sanfilippo <LinoSanfilippo@....de>
> ---
> 
> v4: Remove a superfluous blank line
>     Remove an unneeded cast (both requested by Uwe Kleine-König)
> v3: Check against period truncation (also based on a review by Uwe)
> v2: Fix compiler error for 64 bit builds
> 
>  drivers/pwm/pwm-bcm2835.c | 69 +++++++++++++++++------------------------------
>  1 file changed, 24 insertions(+), 45 deletions(-) j

Applied, thanks.

Thierry

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