linux-kernel - Re: [PATCH] clk: rockchip: rk3568: Add PLL rate for 101MHz

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Message-ID: <20230626093859.GS18491@pengutronix.de>
Date:   Mon, 26 Jun 2023 11:38:59 +0200
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     Alibek Omarov <a1ba.omarov@...il.com>
Cc:     linux-rockchip@...ts.infradead.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: rockchip: rk3568: Add PLL rate for 101MHz

On Wed, Jun 14, 2023 at 04:47:16PM +0300, Alibek Omarov wrote:
> This patch adds PLL setting for not so common resolution as 1920x720-50.00,
> which can be set using 2500 horizontal signals and 808 vertical.
> 
> Signed-off-by: Alibek Omarov <a1ba.omarov@...il.com>

Reviewed-by: Sascha Hauer <s.hauer@...gutronix.de>


> ---
>  drivers/clk/rockchip/clk-rk3568.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/rockchip/clk-rk3568.c b/drivers/clk/rockchip/clk-rk3568.c
> index f85902e2590c..5dae960af4ce 100644
> --- a/drivers/clk/rockchip/clk-rk3568.c
> +++ b/drivers/clk/rockchip/clk-rk3568.c
> @@ -79,6 +79,7 @@ static struct rockchip_pll_rate_table rk3568_pll_rates[] = {
>  	RK3036_PLL_RATE(135000000, 2, 45, 4, 1, 1, 0),
>  	RK3036_PLL_RATE(119000000, 3, 119, 4, 2, 1, 0),
>  	RK3036_PLL_RATE(108000000, 2, 45, 5, 1, 1, 0),
> +	RK3036_PLL_RATE(101000000, 1, 101, 6, 4, 1, 0),

refdiv = 1
fbdiv = 101
postdiv1 = 6
postdiv2 = 4

((24000000/1)*101)/6/4 = 101000000

Ok.

Sascha

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