linux-kernel - Re: [PATCH 1/2] pwm: atmel-tcb: add missing clk source config

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Message-ID: <523AA6A1.4070000@atmel.com>
Date:	Thu, 19 Sep 2013 09:24:17 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Boris BREZILLON <b.brezillon@...rkiz.com>
CC:	Thierry Reding <thierry.reding@...il.com>,
	<linux-pwm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] pwm: atmel-tcb: add missing clk source config

On 18/09/2013 17:06, Boris BREZILLON :
> Clock source changes are never applied to the CMR register.
> This may lead to wrong period/duty cycle configuration.
>
> 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, 2 insertions(+)
>
> diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
> index ba6ce01..0266969 100644
> --- a/drivers/pwm/pwm-atmel-tcb.c
> +++ b/drivers/pwm/pwm-atmel-tcb.c
> @@ -249,6 +249,8 @@ static int atmel_tcb_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
>   		}
>   	}
>
> +	cmr |= (tcbpwm->div & ATMEL_TC_TCCLKS);
> +
>   	__raw_writel(cmr, regs + ATMEL_TC_REG(group, CMR));
>
>   	if (index == 0)
>


-- 
Nicolas Ferre
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