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clk: imx: clk-fracn-gppll: Return rate in rate table properly in ->recalc_rate()

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The PLL parameters in rate table should be directly compared with
those read from PLL registers instead of the cooked ones.

Fixes: 1b26cb8a77a4 ("clk: imx: support fracn gppll")
Cc: Abel Vesa <abel.vesa@nxp.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20220609132902.3504651-6-peng.fan@oss.nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
This commit is contained in:
Liu Ying 2022-06-09 21:29:00 +08:00 committed by Abel Vesa
parent 044034efbe
commit 5ebaf9f7da
1 changed files with 13 additions and 11 deletions
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24
drivers/clk/imx/clk-fracn-gppll.c
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@ -131,18 +131,7 @@ static unsigned long clk_fracn_gppll_recalc_rate(struct clk_hw *hw, unsigned lon
mfi = FIELD_GET(PLL_MFI_MASK, pll_div);
rdiv = FIELD_GET(PLL_RDIV_MASK, pll_div);
rdiv = rdiv + 1;
odiv = FIELD_GET(PLL_ODIV_MASK, pll_div);
switch (odiv) {
case 0:
odiv = 2;
break;
case 1:
odiv = 3;
break;
default:
break;
}
/*
* Sometimes, the recalculated rate has deviation due to
@ -160,6 +149,19 @@ static unsigned long clk_fracn_gppll_recalc_rate(struct clk_hw *hw, unsigned lon
if (rate)
return (unsigned long)rate;
rdiv = rdiv + 1;
switch (odiv) {
case 0:
odiv = 2;
break;
case 1:
odiv = 3;
break;
default:
break;
}
/* Fvco = Fref * (MFI + MFN / MFD) */
fvco = fvco * mfi * mfd + fvco * mfn;
do_div(fvco, mfd * rdiv * odiv);