linux-kernel - [PATCH 4.16 133/161] clk: meson: axg: add the fractional part of the fixed

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Date:   Thu, 24 May 2018 11:39:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jerome Brunet <jbrunet@...libre.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 133/161] clk: meson: axg: add the fractional part of the fixed_pll

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jerome Brunet <jbrunet@...libre.com>

[ Upstream commit 6b71aceceb09918daf37a40a1221077599040be3 ]

The fixed_pll also has a fractional part. On axg s400 board, without
this parameter, the calculated rate is off by ~8Mhz (0,4%). The fixed_pll
being the root of the peripheral clock tree, this error is propagated to
the rest of the clocks

Adding the definition of the parameter fixes the problem

Fixes: 78b4af312f91 ("clk: meson-axg: add clock controller drivers")
Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/clk/meson/axg.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/clk/meson/axg.c
+++ b/drivers/clk/meson/axg.c
@@ -129,6 +129,11 @@ static struct meson_clk_pll axg_fixed_pl
 		.shift   = 16,
 		.width   = 2,
 	},
+	.frac = {
+		.reg_off = HHI_MPLL_CNTL2,
+		.shift   = 0,
+		.width   = 12,
+	},
 	.lock = &meson_clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "fixed_pll",