linux-kernel - [PATCH 4.19 162/243] clk: meson: meson8b: fix the offset of vid_pll

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Message-Id: <20191211150350.098521030@linuxfoundation.org>
Date:   Wed, 11 Dec 2019 16:05:24 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jianxin Pan <jianxin.pan@...ogic.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 162/243] clk: meson: meson8b: fix the offset of vid_pll_dcos N value

From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

[ Upstream commit 376d8c45bd6ac79f02ecf9ca1606dc5d1b271bc0 ]

Unlike the other PLLs on Meson8b the N value "vid_pll_dco" (a better
name would be hdmi_pll_dco or - as the datasheet calls it - HPLL) is
located at HHI_VID_PLL_CNTL[14:10] instead of [13:9].
This results in an incorrect calculation of the rate of this PLL because
the value seen by the kernel is double the actual N (divider) value.
Update the offset of the N value to fix the calculation of the PLL rate.

Fixes: 28b9fcd016126e ("clk: meson8b: Add support for Meson8b clocks")
Reported-by: Jianxin Pan <jianxin.pan@...ogic.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
Link: https://lkml.kernel.org/r/20181202214220.7715-2-martin.blumenstingl@googlemail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/meson/meson8b.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 9d79ff857d83e..e90af556ff90f 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -144,7 +144,7 @@ static struct clk_regmap meson8b_vid_pll = {
 		},
 		.n = {
 			.reg_off = HHI_VID_PLL_CNTL,
-			.shift   = 9,
+			.shift   = 10,
 			.width   = 5,
 		},
 		.od = {
-- 
2.20.1