From: Liu Ying <victor.liu@nxp.com>
To: linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Abel Vesa <abel.vesa@nxp.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH] clk: imx: clk-fracn-gppll: Return rate in rate table properly in ->recalc_rate()
Date: Sun, 29 May 2022 15:11:56 +0800 [thread overview]
Message-ID: <20220529071156.2511568-1-victor.liu@nxp.com> (raw)
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>
---
drivers/clk/imx/clk-fracn-gppll.c | 24 +++++++++++++-----------
1 file changed, 13 insertions(+), 11 deletions(-)
diff --git a/drivers/clk/imx/clk-fracn-gppll.c b/drivers/clk/imx/clk-fracn-gppll.c
index 71c102d950ab..762b07dd5a6d 100644
--- a/drivers/clk/imx/clk-fracn-gppll.c
+++ b/drivers/clk/imx/clk-fracn-gppll.c
@@ -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);
--
2.25.1
next reply other threads:[~2022-05-29 7:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-29 7:11 Liu Ying [this message]
2022-05-30 2:08 ` [PATCH] clk: imx: clk-fracn-gppll: Return rate in rate table properly in ->recalc_rate() Peng Fan
2022-05-30 9:08 ` Peng Fan
2022-05-31 1:45 ` Liu Ying
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