From 7e4db0c2836e892766565965207eee051c8037b9 Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Fri, 16 Feb 2018 15:57:52 +0100 Subject: [PATCH] clk: samsung: exynos7: Fix PLL rates Rates declared in PLL rate tables should match exactly rates calculated from the PLL coefficients. If that is not the case, rate of the PLL's child clock might be set not as expected. For instance, if in the PLL rates table we have a 393216000 Hz entry and the real value as returned by the PLL's recalc_rate callback is 393216003, after setting PLL's clk rate to 393216000 clk_get_rate will return 393216003. If we now attempt to set rate of a PLL's child divider clock to 393216000/2 its rate will be 131072001, rather than 196608000. That is, the divider will be set to 3 instead of 2, because 393216003/2 is greater than 196608000. To fix this issue declared rates are changed to exactly match rates generated by the PLL, as calculated from the P, M, S, K coefficients. Signed-off-by: Andrzej Hajda Acked-by: Tomasz Figa Acked-by: Chanwoo Choi Signed-off-by: Sylwester Nawrocki --- drivers/clk/samsung/clk-exynos7.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/samsung/clk-exynos7.c b/drivers/clk/samsung/clk-exynos7.c index 5931a41..bbfa57b 100644 --- a/drivers/clk/samsung/clk-exynos7.c +++ b/drivers/clk/samsung/clk-exynos7.c @@ -140,7 +140,7 @@ static const struct samsung_div_clock topc_div_clks[] __initconst = { }; static const struct samsung_pll_rate_table pll1460x_24mhz_tbl[] __initconst = { - PLL_36XX_RATE(491520000, 20, 1, 0, 31457), + PLL_36XX_RATE(491519897, 20, 1, 0, 31457), {}, }; -- 2.7.4