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[82.243.161.21]) by smtp.gmail.com with ESMTPSA id s12sm14045158wmc.7.2020.04.27.02.06.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Apr 2020 02:06:28 -0700 (PDT) References: <20200426162119.GA23268@imac> User-agent: mu4e 1.3.3; emacs 26.3 From: Jerome Brunet To: elatllat@gmail.com Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, joy.cho@hardkernel.com, narmstrong@baylibre.com, khilman@baylibre.com, christianshewitt@gmail.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, tobetter@gmail.com, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v4] arm64: dts: meson: S922X: extend cpu opp-points In-reply-to: <20200426162119.GA23268@imac> Date: Mon, 27 Apr 2020 11:06:27 +0200 Message-ID: <1ja72x2t7w.fsf@starbuckisacylon.baylibre.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun 26 Apr 2020 at 18:21, Tim Lewis wrote: > Add extra cpu pop points to allow mild overclock on S922X. The opp > points are found in Hardkernel N2 sources [1] and testing shows no > obvious issues on other S922X devices. Thermal throttling should > keep things in-check if needed. The Odroid-N2 has a massive heatsink mounted. Do we have any idea if this applies (is safe) on any other S922x device ? It would be nice to get some input (review) from Amlogic is this to included for any devices using the SoC. In the meantime, I think this should be applied to odroid-n2 dt only. > > [1] https://github.com/hardkernel/linux/commit/f86cd9487c7483b2a05f448b9ebacf6bd5a2ad2f > Tested-by: Christian Hewitt > Reviewed-by: Neil Armstrong > Signed-off-by: Tim Lewis > > --- > arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi | 15 +++++++++++++++ > 1 files changed, 15 insertions(+) > > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi > index 046cc332d..1e5d0ee5d 100644 > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi > @@ -65,6 +65,11 @@ > opp-hz = /bits/ 64 <1896000000>; > opp-microvolt = <981000>; > }; > + > + opp-1992000000 { > + opp-hz = /bits/ 64 <1992000000>; > + opp-microvolt = <1001000>; > + }; > }; > > cpub_opp_table_1: opp-table-1 { > @@ -120,5 +125,15 @@ > opp-hz = /bits/ 64 <1704000000>; > opp-microvolt = <891000>; > }; > + > + opp-1800000000 { > + opp-hz = /bits/ 64 <1800000000>; > + opp-microvolt = <981000>; > + }; > + > + opp-1908000000 { > + opp-hz = /bits/ 64 <1908000000>; > + opp-microvolt = <1022000>; > + }; > }; > };