linux-kernel - Re: [RESEND 10/11] pwm: sti: Enable PWM Capture

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20160412105609.GF18882@ulmo.ba.sec>
Date:	Tue, 12 Apr 2016 12:56:09 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, maxime.coquelin@...com,
	linux-pwm@...r.kernel.org, ajitpal.singh@...com
Subject: Re: [RESEND 10/11] pwm: sti: Enable PWM Capture

On Wed, Mar 02, 2016 at 03:32:08PM +0000, Lee Jones wrote:
> Once all functionality is in place, we provide the means to
> enable PWM Capture.  Here we are simply obtaining the
> associated regmap and twiddling the relevant enable register
> bits.
> 
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/pwm/pwm-sti.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c
> index 8de9b4a..93cf20e 100644
> --- a/drivers/pwm/pwm-sti.c
> +++ b/drivers/pwm/pwm-sti.c
> @@ -279,6 +279,13 @@ static int sti_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
>  				pwm->hwpwm);
>  			goto out;
>  		}
> +
> +		ret = regmap_field_write(pc->pwm_cpt_en, 1);
> +		if (ret) {
> +			dev_err(dev, "failed to enable PWM capture:%d\n",
> +				pwm->hwpwm);
> +			goto out;
> +		}

Should this perhaps be part of the driver's ->capture() implementation?
It seems redundant to have this logic enabled if we may never use it.

Thierry

Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)