linux-kernel - Re: [PATCH 2/2] pwm: atmel-tcb: fix max time computation for slow clk source

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: <523AA6C4.6000305@atmel.com>
Date:	Thu, 19 Sep 2013 09:24:52 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Boris BREZILLON <b.brezillon@...rkiz.com>,
	Thierry Reding <thierry.reding@...il.com>
CC:	<linux-pwm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/2] pwm: atmel-tcb: fix max time computation for slow
 clk source

On 18/09/2013 17:06, Boris BREZILLON :
> Use the the tcb counter width to compute the maximum time that can be
> represented using the slow clock source instead of the static 16 bit width.
>
> Signed-off-by: Boris BREZILLON <b.brezillon@...rkiz.com>

Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>

> ---
>   drivers/pwm/pwm-atmel-tcb.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
> index 0266969..f3dcd02 100644
> --- a/drivers/pwm/pwm-atmel-tcb.c
> +++ b/drivers/pwm/pwm-atmel-tcb.c
> @@ -307,7 +307,7 @@ static int atmel_tcb_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
>   		i = slowclk;
>   		rate = 32768;
>   		min = div_u64(NSEC_PER_SEC, rate);
> -		max = min << 16;
> +		max = min << tc->tcb_config->counter_width;
>
>   		/* If period is too big return ERANGE error */
>   		if (max < period_ns)
>


-- 
Nicolas Ferre
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/