linux-kernel - [PATCH] clk: rockchip: rk3568: Fix PLL rate setting for 78.75MHz

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Message-Id: <20230614134750.1056293-1-a1ba.omarov@gmail.com>
Date:   Wed, 14 Jun 2023 16:47:50 +0300
From:   Alibek Omarov <a1ba.omarov@...il.com>
To:     linux-rockchip@...ts.infradead.org
Cc:     a1ba.omarov@...il.com, Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] clk: rockchip: rk3568: Fix PLL rate setting for 78.75MHz

PLL rate on RK356x is calculated through the simple formula:
((24000000 / _refdiv) * _fbdiv) / (_postdiv1 * _postdiv2)

The PLL rate setting for 78.75MHz seems to be copied from 96MHz
so this patch fixes it and configures it properly.

Signed-off-by: Alibek Omarov <a1ba.omarov@...il.com>
Fixes: 842f4cb72639 ("clk: rockchip: Add more PLL rates for rk3568")
---
 drivers/clk/rockchip/clk-rk3568.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/rockchip/clk-rk3568.c b/drivers/clk/rockchip/clk-rk3568.c
index 5dae960af4ce..48b8d06c305c 100644
--- a/drivers/clk/rockchip/clk-rk3568.c
+++ b/drivers/clk/rockchip/clk-rk3568.c
@@ -82,7 +82,7 @@ static struct rockchip_pll_rate_table rk3568_pll_rates[] = {
 	RK3036_PLL_RATE(101000000, 1, 101, 6, 4, 1, 0),
 	RK3036_PLL_RATE(100000000, 1, 150, 6, 6, 1, 0),
 	RK3036_PLL_RATE(96000000, 1, 96, 6, 4, 1, 0),
-	RK3036_PLL_RATE(78750000, 1, 96, 6, 4, 1, 0),
+	RK3036_PLL_RATE(78750000, 4, 315, 6, 4, 1, 0),
 	RK3036_PLL_RATE(74250000, 2, 99, 4, 4, 1, 0),
 	{ /* sentinel */ },
 };
-- 
2.34.1