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Wed, 17 Jul 2019 10:27:39 +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: <8ed83c77-57f7-78a4-e437-714cfc7b5c58@partner.samsung.com> Date: Wed, 17 Jul 2019 12:27:38 +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: H4sIAAAAAAAAA01Sa0iTYRjt3XdVnH3Oygcro4FQicsi6IWsVljsV2QQSKK16kMjnbZPTbPL ilZW3ohIW2ZqmbbMy1pLJ2boSMps2UXNMA0XYToiL2iEq81vkf/Oc57zvOcceFlC5qCC2SOa NF6rUSfJaV/S8vyXPXz5jCIuouk9i/trX1O4obiOwr2T3yh82+YeC4ZHCWy31zO469wYg03D PRT+mfuZwu+sJTQutj+V4Ie2AQZX9nZLcPfLHfjT2Woa61tsDG4fu0hhV08DqZSpakprkOpH n55RmYyXaNWju2dU+WYjUk2YQnbT+3wjD/NJRzJ47dotB3wTmybGJakWOvP3SA6tQzrqMvJh gdsALZaLksvIl5Vx1QhuNn5C4jCJoNVh8G4mEDSP3SH/nXyZzSPERRUC/WsjIw5OBPambolH FcjthUJDLuPBi7jV0Ds7TXlEBPeBhJnBafdTLEtzCmg0HvNopNxOGCi00R5McqHw6P6NObfF XAy8M1uRqAmAFzccc7wPFw2VQ2VzeoILgn7HbYmIV8ATZ8lcOuAusVD07Lk3dhSUXzN5cSB8 7zAzIl4Gf5rEY+AE0OWVIxGfhOGCW17NJmjv6KY8mQl3mTrrWpHeBtPts4yHBs4f+pwBYgR/ uGopIkRaCjkXZKJ6FZhz33iNlkBVzXWmEMkN84oZ5pUxzCtj+O9bhkgjCuLTheQEXlin4Y8r BHWykK5JUBxKSTYh99/rdHWMN6KptwfbEMciuZ9U1R4eJ6PUGUJWchsClpAvkm6eCouTSQ+r s07w2pT92vQkXmhDS1lSHiTNXjAUK+MS1Gn8UZ5P5bX/thLWJ1iHFv/uqvg889HxvlSqLE0v FgwrH3ReyX4aPzCuZFr8opb3nl5oCW1ef60i7064Ky1yJGN06OF21Bkf/3hv5J6jzl3W1nrb vZCvro2Ndy0xtba6vtjo3LD8j61kR6p1LO9YTERRc6BfT8+gU6+SbH0VcYqY6o86jzJz0iqj Sz4o9/NyUkhUr1tDaAX1XwLB7od3AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrBIsWRmVeSWpSXmKPExsVy+t/xu7oyP/RiDWY/5LC4te4cq8XGGetZ La5/ec5qMf8IkNv/+DWzxfnzG9gtzja9YbfY9Pgaq8XHnnusFpd3zWGzmHF+H5PF2iN32S2W Xr/IZHHxlKvF7cYVbBate4+wWxx+085q8e/aRhYHIY8189Ywery/0crusWlVJ5vH5iX1Hn1b VjF6fN4kF8AWpWdTlF9akqqQkV9cYqsUbWhhpGdoaaFnZGKpZ2hsHmtlZKqkb2eTkpqTWZZa pG+XoJex8/MnpoJtbBW/X3awNTA2sHYxcnJICJhIPPzby9zFyMUhJLCUUeLj6RdQCTGJSfu2 s0PYwhJ/rnWxQRS9ZpS4u7aXDSQhLBAqMWFWD1iRiICmxPW/31lBipgFrrJITHm1kR2io59J 4sfESSxdjBwcbAJ6EjtWFYI08Aq4SdydcARsEIuAqsTmlTNZQGxRgQiJvrbZbBA1ghInZz4B i3MKBEosfbAALM4sYCYxb/NDZghbXOLWk/lMELa8xPa3c5gnMArNQtI+C0nLLCQts5C0LGBk WcUoklpanJueW2ykV5yYW1yal66XnJ+7iREY69uO/dyyg7HrXfAhRgEORiUeXo/DurFCrIll xZW5hxglOJiVRHhtv2rHCvGmJFZWpRblxxeV5qQWH2I0BXpuIrOUaHI+MA3llcQbmhqaW1ga mhubG5tZKInzdggcjBESSE8sSc1OTS1ILYLpY+LglGpgFA2/NX9/W6Na69v9PGym0zU/7X2f H/BOi71vYcbmcJf2izfe31uw+8MaM+MTHpOvpoWe/jApuvPpG40PKwod5U3zLWv2bNg7nfGo 5Ip1RUd6qnor9vJmzAtc3m370VxjavrFqt+/RCIrAk40mju8EX1/xTdO7uRhtv2/pibbHugq SGef0rfrjRJLcUaioRZzUXEiAHEFoU0LAwAA X-CMS-MailID: 20190717102740eucas1p17ffdf3b1560ad6d56311b5a92e9a5e7a 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> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Regards, Lukasz > > Best regards, > Krzysztof > >