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([2001:861:44c0:66c0:1add:1b28:2457:eb46]) by smtp.gmail.com with ESMTPSA id b3-20020adfd1c3000000b00205820686dasm9781330wrd.5.2022.04.04.00.50.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 Apr 2022 00:50:31 -0700 (PDT) Message-ID: Date: Mon, 4 Apr 2022 09:50:30 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH v2 1/2] arm64: dts: meson: remove CPU opps below 1GHz for G12B boards Content-Language: en-US To: Christian Hewitt , Rob Herring , Mark Rutland , Kevin Hilman , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org References: <20220210100638.19130-1-christianshewitt@gmail.com> <20220210100638.19130-2-christianshewitt@gmail.com> From: Neil Armstrong Organization: Baylibre In-Reply-To: <20220210100638.19130-2-christianshewitt@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220404_005036_578005_2A524150 X-CRM114-Status: GOOD ( 15.43 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On 10/02/2022 11:06, Christian Hewitt wrote: > Amlogic G12B devices experience CPU stalls and random board wedges when > the system idles and CPU cores clock down to lower opp points. Recent > vendor kernels include a change to remove 100-250MHz and other distro > sources also remove the 500/667MHz points. Unless all 100-667Mhz opps > are removed or the CPU governor forced to performance stalls are still > observed, so let's remove them to improve stability and uptime. > > Fixes: b96d4e92709b ("arm64: dts: meson-g12b: support a311d and s922x cpu operating points") > Signed-off-by: Christian Hewitt > --- > .../boot/dts/amlogic/meson-g12b-a311d.dtsi | 40 ------------------- > .../boot/dts/amlogic/meson-g12b-s922x.dtsi | 40 ------------------- > 2 files changed, 80 deletions(-) > > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi > index d61f43052a34..8e9ad1e51d66 100644 > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi > @@ -11,26 +11,6 @@ > compatible = "operating-points-v2"; > opp-shared; > > - opp-100000000 { > - opp-hz = /bits/ 64 <100000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-250000000 { > - opp-hz = /bits/ 64 <250000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-500000000 { > - opp-hz = /bits/ 64 <500000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-667000000 { > - opp-hz = /bits/ 64 <667000000>; > - opp-microvolt = <731000>; > - }; > - > opp-1000000000 { > opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <761000>; > @@ -71,26 +51,6 @@ > compatible = "operating-points-v2"; > opp-shared; > > - opp-100000000 { > - opp-hz = /bits/ 64 <100000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-250000000 { > - opp-hz = /bits/ 64 <250000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-500000000 { > - opp-hz = /bits/ 64 <500000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-667000000 { > - opp-hz = /bits/ 64 <667000000>; > - opp-microvolt = <731000>; > - }; > - > opp-1000000000 { > opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <731000>; > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi > index 1e5d0ee5d541..44c23c984034 100644 > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi > @@ -11,26 +11,6 @@ > compatible = "operating-points-v2"; > opp-shared; > > - opp-100000000 { > - opp-hz = /bits/ 64 <100000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-250000000 { > - opp-hz = /bits/ 64 <250000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-500000000 { > - opp-hz = /bits/ 64 <500000000>; > - opp-microvolt = <731000>; > - }; > - > - opp-667000000 { > - opp-hz = /bits/ 64 <667000000>; > - opp-microvolt = <731000>; > - }; > - > opp-1000000000 { > opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <731000>; > @@ -76,26 +56,6 @@ > compatible = "operating-points-v2"; > opp-shared; > > - opp-100000000 { > - opp-hz = /bits/ 64 <100000000>; > - opp-microvolt = <751000>; > - }; > - > - opp-250000000 { > - opp-hz = /bits/ 64 <250000000>; > - opp-microvolt = <751000>; > - }; > - > - opp-500000000 { > - opp-hz = /bits/ 64 <500000000>; > - opp-microvolt = <751000>; > - }; > - > - opp-667000000 { > - opp-hz = /bits/ 64 <667000000>; > - opp-microvolt = <751000>; > - }; > - > opp-1000000000 { > opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <771000>; Reviewed-by: Neil Armstrong _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic