linux-kernel - Re: [PATCH v5 10/15] clk: at91: clk-master: fix prescaler logic

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Date:   Fri, 15 Oct 2021 09:58:34 +0200
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>,
        <mturquette@...libre.com>, <sboyd@...nel.org>,
        <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>
CC:     <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 10/15] clk: at91: clk-master: fix prescaler logic

On 11/10/2021 at 13:27, Claudiu Beznea wrote:
> When prescaler value read from register is MASTER_PRES_MAX it means
> that the input clock will be divided by 3. Fix the code to reflect
> this.
> 
> Fixes: 7a110b9107ed8 ("clk: at91: clk-master: re-factor master clock")
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>

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

> ---
>   drivers/clk/at91/clk-master.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
> index 6da9ae34313a..e67bcd03a827 100644
> --- a/drivers/clk/at91/clk-master.c
> +++ b/drivers/clk/at91/clk-master.c
> @@ -386,7 +386,7 @@ static unsigned long clk_master_pres_recalc_rate(struct clk_hw *hw,
>   
>   	val &= master->layout->mask;
>   	pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK;
> -	if (pres == 3 && characteristics->have_div3_pres)
> +	if (pres == MASTER_PRES_MAX && characteristics->have_div3_pres)
>   		pres = 3;
>   	else
>   		pres = (1 << pres);
> 


-- 
Nicolas Ferre