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Wed, 17 Jul 2019 10:41:33 +0000 (GMT) Subject: Re: [PATCH v1 26/50] ARM: dts: exynos: align NOC100 bus OPPs in Exynos5420 To: Krzysztof Kozlowski Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "linux-samsung-soc@vger.kernel.org" , linux-clk@vger.kernel.org, mturquette@baylibre.com, sboyd@kernel.org, =?UTF-8?Q?Bart=c5=82omiej_=c5=bbo=c5=82nierkiewicz?= , kgene@kernel.org, mark.rutland@arm.com, robh+dt@kernel.org, Chanwoo Choi , kyungmin.park@samsung.com, Andrzej Hajda , Marek Szyprowski , s.nawrocki@samsung.com, myungjoo.ham@samsung.com From: Lukasz Luba Message-ID: <4d91a2fd-b6cf-37cc-d453-eb147ea6a1da@partner.samsung.com> Date: Wed, 17 Jul 2019 12:41:32 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrIKsWRmVeSWpSXmKPExsWy7djP87rxv/ViDY68FLS4te4cq8XGGetZ La5/ec5qMf8IkNv/+DWzxfnzG9gtzja9YbfY9Pgaq8XHnnusFpd3zWGzmHF+H5PF2iN32S2W Xr/IZHHxlKvF7cYVbBate4+wWxx+085q8e/aRhYHIY8189Ywery/0crusWlVJ5vH5iX1Hn1b VjF6fN4kF8AWxWWTkpqTWZZapG+XwJVx8MFJloLDnBVXV61hbWDcxd7FyMkhIWAi8fZPNwuI LSSwglHi1UqmLkYuIPsLo8SMs1PZIJzPjBKf5y1hgum43HSXFaJjOaPEriYpiKK3jBKH3t0E GyssECoxYVYPmC0ioClx/e93VpAiZoGrLBI/7n8H2sfBwSagJ7FjVSFIDa+Am0TjpEawM1gE VCWmXd8EtkxUIELi8pZdjBA1ghInZz4Bq+EUCJTYfnsWWJxZQFzi1pP5TBC2vMT2t3OYIQ7t 5JBo310OYbtIfOqYBfWAsMSr41ug3peROD25hwXCLpZo6F3ICGHXSDzunwtVYy1x+PhFVpCT mYF+Wb9LHyLsKPH98F92kLCEAJ/EjbeCEBfwSUzaNp0ZIswr0dEmBFGtIbGl5wLUAWISy9dM Y5/AqDQLyV+zkPwyC8kvsxD2LmBkWcUonlpanJueWmyYl1quV5yYW1yal66XnJ+7iRGY8E7/ O/5pB+PXS0mHGAU4GJV4eD0O68YKsSaWFVfmHmKU4GBWEuG1/aodK8SbklhZlVqUH19UmpNa fIhRmoNFSZy3muFBtJBAemJJanZqakFqEUyWiYNTqoHRk8s09Yo1T4vQebYf7TXXNtZZ3Xsj nr54nsyy6h3uNjb91RrP9Pk2bZrDnLWgyefUTNE9jTyFC93OzuxnMTr+xsHt58GFJspSve97 lket73mxZup+5S9aPBcFZswqd4y6Ja/Z4Hoydh5vdO7OWWIRu2fm/3i/oZIrIU6zOLLvYaLJ Sv4fYqxKLMUZiYZazEXFiQDN73wsdAMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrGIsWRmVeSWpSXmKPExsVy+t/xu7pxv/ViDZ4s5Le4te4cq8XGGetZ La5/ec5qMf8IkNv/+DWzxfnzG9gtzja9YbfY9Pgaq8XHnnusFpd3zWGzmHF+H5PF2iN32S2W Xr/IZHHxlKvF7cYVbBate4+wWxx+085q8e/aRhYHIY8189Ywery/0crusWlVJ5vH5iX1Hn1b VjF6fN4kF8AWpWdTlF9akqqQkV9cYqsUbWhhpGdoaaFnZGKpZ2hsHmtlZKqkb2eTkpqTWZZa pG+XoJdx8MFJloLDnBVXV61hbWDcxd7FyMkhIWAicbnpLiuILSSwlFFi/6IsiLiYxKR926Fq hCX+XOtig6h5zSgxo80JxBYWCJWYMKsHrEZEQFPi+t/vQHO4OJgFrrJITHm1kR3EERKYzCwx +8oC5i5GDg42AT2JHasKQRp4BdwkGic1soDYLAKqEtOub2ICsUUFIiT62mazQdQISpyc+QSs hlMgUGL77VmMIDazgJnEvM0PmSFscYlbT+YzQdjyEtvfzmGewCg0C0n7LCQts5C0zELSsoCR ZRWjSGppcW56brGhXnFibnFpXrpecn7uJkZgnG879nPzDsZLG4MPMQpwMCrx8Hoc1o0VYk0s K67MPcQowcGsJMJr+1U7Vog3JbGyKrUoP76oNCe1+BCjKdBzE5mlRJPzgSkoryTe0NTQ3MLS 0NzY3NjMQkmct0PgYIyQQHpiSWp2ampBahFMHxMHp1QDo8dqjkeJkYbLlxnLFn92XsTvz1u7 +myzgbfS6dkrr4nt7099dq+udud79YduFnea5sS264uJ7l68zIPtgNgDc8YyUd1GewkBl5/L HpuqRXPPjgxN4TL9o6Q9+9nFR1uMuP6V59RGm/qpmM2I9fd7Zj7rmJnvDe80cfY/+418/ZZd i5hxVadKiaU4I9FQi7moOBEAzmjlkQkDAAA= X-CMS-MailID: 20190717104134eucas1p2a35d37e96f71333e4be84bf4d5029aba X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20190715124455eucas1p13bfc0c1d113225db9607e4c0dbac353c X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190715124455eucas1p13bfc0c1d113225db9607e4c0dbac353c References: <20190715124417.4787-1-l.luba@partner.samsung.com> <20190715124417.4787-27-l.luba@partner.samsung.com> <8ed83c77-57f7-78a4-e437-714cfc7b5c58@partner.samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/17/19 12:38 PM, Krzysztof Kozlowski wrote: > On Wed, 17 Jul 2019 at 12:27, Lukasz Luba wrote: >> >> >> On 7/17/19 12:10 PM, Krzysztof Kozlowski wrote: >>> On Mon, 15 Jul 2019 at 14:44, Lukasz Luba wrote: >>>> >>>> The NOC100 has a parent which clock rate is set tot 400MHz. The OPPs which >>>> are not possible to set are removed and new one is added. >>> >>> I think it is just NOC bus... or are there more of such and this is 100 MHz one? >> Yes, there is a bus NOC100 with a dedicated clock tree in the HW (with >> 3 muxes and one divider), which makes possible to take different PLL as >> a source then WCORE have, divide the rate from it and even switch for a >> while to alternative stable PLL (on the 2nd mux to SPLL (after a >> divider)) to wait for main PLL rate change stability delay. Max rate is >> limited to 100MHz for this NOC100 bus. > > I think we misunderstood each other. I am saying, that the bus is > called "NOC" in the DTSI. Not NOC100. So unless there are more of > NOCs, stick to existing name NOC, even if it is not the most accurate. OK, got it, thanks! Lukasz > > Best regards, > Krzysztof > > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB181C76186 for ; Wed, 17 Jul 2019 10:41:49 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 786BF2173B for ; Wed, 17 Jul 2019 10:41:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cOqKlaDg"; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 7/17/19 12:38 PM, Krzysztof Kozlowski wrote: > On Wed, 17 Jul 2019 at 12:27, Lukasz Luba wrote: >> >> >> On 7/17/19 12:10 PM, Krzysztof Kozlowski wrote: >>> On Mon, 15 Jul 2019 at 14:44, Lukasz Luba wrote: >>>> >>>> The NOC100 has a parent which clock rate is set tot 400MHz. The OPPs which >>>> are not possible to set are removed and new one is added. >>> >>> I think it is just NOC bus... or are there more of such and this is 100 MHz one? >> Yes, there is a bus NOC100 with a dedicated clock tree in the HW (with >> 3 muxes and one divider), which makes possible to take different PLL as >> a source then WCORE have, divide the rate from it and even switch for a >> while to alternative stable PLL (on the 2nd mux to SPLL (after a >> divider)) to wait for main PLL rate change stability delay. Max rate is >> limited to 100MHz for this NOC100 bus. > > I think we misunderstood each other. I am saying, that the bus is > called "NOC" in the DTSI. Not NOC100. So unless there are more of > NOCs, stick to existing name NOC, even if it is not the most accurate. OK, got it, thanks! Lukasz > > Best regards, > Krzysztof > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel