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Message-Id: <20240510-imx-clk-v2-4-c998f315d29c@nxp.com>
Date: Fri, 10 May 2024 17:18:59 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Abel Vesa <abelvesa@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>, Jacky Bai <ping.bai@....com>,
Ye Li <ye.li@....com>, Dong Aisheng <aisheng.dong@....com>
Cc: linux-clk@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Abel Vesa <abel.vesa@...aro.org>, Peng Fan <peng.fan@....com>,
Pengfei Li <pengfei.li_1@....com>
Subject: [PATCH v2 04/17] clk: imx: fracn-gppll: fix fractional part of PLL
getting lost
From: Pengfei Li <pengfei.li_1@....com>
Fractional part of PLL gets lost after re-enabling the PLL. the
MFN can NOT be automatically loaded when doing frac PLL enable/disable,
So when re-enable PLL, configure mfn explicitly.
Fixes: 1b26cb8a77a4 ("clk: imx: support fracn gppll")
Signed-off-by: Pengfei Li <pengfei.li_1@....com>
Reviewed-by: Jacky Bai <ping.bai@....com>
Signed-off-by: Peng Fan <peng.fan@....com>
---
drivers/clk/imx/clk-fracn-gppll.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/clk/imx/clk-fracn-gppll.c b/drivers/clk/imx/clk-fracn-gppll.c
index 44462ab50e51..1becba2b62d0 100644
--- a/drivers/clk/imx/clk-fracn-gppll.c
+++ b/drivers/clk/imx/clk-fracn-gppll.c
@@ -291,6 +291,10 @@ static int clk_fracn_gppll_prepare(struct clk_hw *hw)
if (val & POWERUP_MASK)
return 0;
+ if (pll->flags & CLK_FRACN_GPPLL_FRACN)
+ writel_relaxed(readl_relaxed(pll->base + PLL_NUMERATOR),
+ pll->base + PLL_NUMERATOR);
+
val |= CLKMUX_BYPASS;
writel_relaxed(val, pll->base + PLL_CTRL);
--
2.37.1
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