linux-kernel - [PATCH AUTOSEL 5.5 300/542] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP

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Date:   Fri, 14 Feb 2020 10:44:52 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Sasha Levin <sashal@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.5 300/542] ARM: dts: meson8: use the actual frequency for the GPU's 182.1MHz OPP

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

[ Upstream commit fe634a7a9a57fb736e39fb71aa9adc6448a90f94 ]

The clock setup on Meson8 cannot achieve a Mali frequency of exactly
182.15MHz. The vendor driver uses "FCLK_DIV7 / 2" for this frequency,
which translates to 2550MHz / 7 / 2 = 182142857Hz.
Update the GPU operating point to that specific frequency to not confuse
myself when comparing the frequency from the .dts with the actual clock
rate on the system.

Fixes: 7d3f6b536e72c9 ("ARM: dts: meson8: add the Mali-450 MP6 GPU")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Signed-off-by: Kevin Hilman <khilman@...libre.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/meson8.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index 3c534cd50ee3b..db2033f674c67 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -129,8 +129,8 @@
 	gpu_opp_table: gpu-opp-table {
 		compatible = "operating-points-v2";
 
-		opp-182150000 {
-			opp-hz = /bits/ 64 <182150000>;
+		opp-182142857 {
+			opp-hz = /bits/ 64 <182142857>;
 			opp-microvolt = <1150000>;
 		};
 		opp-318750000 {
-- 
2.20.1