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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gomBk-0005Iz-RR; Wed, 30 Jan 2019 09:29:44 +0000 Received: from relay12.mail.gandi.net ([217.70.178.232]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gomBh-0005IN-3q for linux-arm-kernel@lists.infradead.org; Wed, 30 Jan 2019 09:29:43 +0000 Received: from localhost (aaubervilliers-681-1-27-226.w90-88.abo.wanadoo.fr [90.88.147.226]) (Authenticated sender: maxime.ripard@bootlin.com) by relay12.mail.gandi.net (Postfix) with ESMTPSA id C75B1200010; Wed, 30 Jan 2019 09:29:27 +0000 (UTC) Date: Wed, 30 Jan 2019 10:29:27 +0100 From: Maxime Ripard To: Chen-Yu Tsai Subject: Re: [PATCH 10/10] arm64: dts: allwinner: h5: Add CPU Operating Performance Points table Message-ID: <20190130092927.x65ihy3je5n6324w@flea> References: <20190130084203.25053-1-wens@csie.org> <20190130084203.25053-11-wens@csie.org> MIME-Version: 1.0 In-Reply-To: <20190130084203.25053-11-wens@csie.org> User-Agent: NeoMutt/20180716 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190130_012941_452782_C7E2569C X-CRM114-Status: GOOD ( 10.66 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Sergey Matyukevich , Andre Przywara , linux-kernel@vger.kernel.org, Emmanuel Vadot , linux-sunxi@googlegroups.com, Jagan Teki , Hauke Mehrtens , linux-arm-kernel@lists.infradead.org, Icenowy Zheng Content-Type: multipart/mixed; boundary="===============1949722415091774980==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============1949722415091774980== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="fkao57vkiawei5pc" Content-Disposition: inline --fkao57vkiawei5pc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jan 30, 2019 at 04:42:03PM +0800, Chen-Yu Tsai wrote: > enable-method =3D "psci"; > clocks =3D <&ccu CLK_CPUX>; > clock-latency-ns =3D <244144>; /* 8 32k periods */ > + operating-points-v2 =3D <&cpu_opp_table>; > + #cooling-cells =3D <2>; > + }; > + }; > + > + cpu_opp_table: opp_table { > + compatible =3D "operating-points-v2"; > + opp-shared; > + > + opp@408000000 { > + opp-hz =3D /bits/ 64 <408000000>; > + opp-microvolt =3D <1000000 1000000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@648000000 { > + opp-hz =3D /bits/ 64 <648000000>; > + opp-microvolt =3D <1040000 1040000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@816000000 { > + opp-hz =3D /bits/ 64 <816000000>; > + opp-microvolt =3D <1080000 1080000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@912000000 { > + opp-hz =3D /bits/ 64 <912000000>; > + opp-microvolt =3D <1120000 1120000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@960000000 { > + opp-hz =3D /bits/ 64 <960000000>; > + opp-microvolt =3D <1160000 1160000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@1008000000 { > + opp-hz =3D /bits/ 64 <1008000000>; > + opp-microvolt =3D <1200000 1200000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@1056000000 { > + opp-hz =3D /bits/ 64 <1056000000>; > + opp-microvolt =3D <1240000 1240000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@1104000000 { > + opp-hz =3D /bits/ 64 <1104000000>; > + opp-microvolt =3D <1260000 1260000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ > + }; > + > + opp@1152000000 { > + opp-hz =3D /bits/ 64 <1152000000>; > + opp-microvolt =3D <1300000 1300000 1310000>; > + clock-latency-ns =3D <244144>; /* 8 32k periods */ What is the frequency and voltage that U-Boot sets up? We've had the issue with the A33 that it's started at 1008MHz, with the matching voltage, and ramping up the frequency to 1.2GHz on boards without PMIC support would increase the frequency but not the voltage, resulting in a brownout. Maxime --=20 Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --fkao57vkiawei5pc Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXFFudgAKCRDj7w1vZxhR xdeCAQDoubN0q581tiwZf/MzwZJNZ0WbAH/O2srVCbUsx9c9AQEAtB7i30h+fWwp nA69KJX4vmzX1+aSqHYC43rH6+0KYAY= =lYRw -----END PGP SIGNATURE----- --fkao57vkiawei5pc-- --===============1949722415091774980== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============1949722415091774980==--