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Fri, 14 Jun 2019 09:53:25 +0000 (GMT) From: Lukasz Luba To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org Cc: mturquette@baylibre.com, sboyd@kernel.org, b.zolnierkie@samsung.com, krzk@kernel.org, kgene@kernel.org, cw00.choi@samsung.com, kyungmin.park@samsung.com, m.szyprowski@samsung.com, s.nawrocki@samsung.com, myungjoo.ham@samsung.com, keescook@chromium.org, tony@atomide.com, jroedel@suse.de, treding@nvidia.com, digetx@gmail.com, gregkh@linuxfoundation.org, willy.mh.wolff.ml@gmail.com, Lukasz Luba Subject: [PATCH v10 07/13] dt-bindings: memory-controllers: add Exynos5422 DMC device description Date: Fri, 14 Jun 2019 11:53:03 +0200 Message-Id: <20190614095309.24100-8-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190614095309.24100-1-l.luba@partner.samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSayyVYRzveW/npQ6vw/IkS52pZEuaLg+nRZvWu+aD1taHynTiHZZz6Lzo otVB7k6UDR33+eA+HJcwcztKURxqJaKLlVZopaQJOd5Tffv9f5f/5dlD45K3pB0doozgVEp5 qJQyJ5oe/BrYna3E/Vzn725CdTk1JHrxfYpEhT0DJKr8OglQXEkNhTL78jH0OFWB0ic/42hw sFaEnsROi9Co2h59TZsg0dPWPArNaXoAyhlsx1B1z7gIDfUdRWMxZRTSTyeSaPl5HYE6nh1H Y4sWaP7hO+Bly87/uEOwX0biRWyueohgW7TjIlZXkUyxHflVIlYTN0uxXbNtGHuroQKw9f3R 7Jxui+/60+aHArnQkChOtefwOfPg9+XxRPiiw+XUnwmkGnTZpQCahsw+WKT1SAHmtIQpA3Cq fIQSiu8AZqQ1YUIxB+DL2HEiBZitJUZH0ghBKAXQMFWG/YsULH8Axr4U4wKbKy4aAzZMDoC5 H08aPThzD4czY6+AUbBmAmBe+xBpxASzHU7ezV3jxYwnfBJz2zTNAVbWduJGbMZ4wfuF02v7 QUZDw9iMfko4whumzNkLfmv4qbdBJGB7uNJSiAmYh2pNMRDwNTiZnm/yyKC+17gDvbrcLljT ukegj0B1nd7U3QKOzFgZaXwV3mnKxgVaDJMSJILbCTakGUyDNsLSqixTcxYmN9WaXicTwIYP S1QGcND+H1YEQAWw5SJ5RRDHuym5Sy68XMFHKoNcAsIUOrD68fqXe380g/bf57sBQwPpBnGn B+YnIeVR/BVFN4A0LrURF8hwP4k4UH7lKqcK81dFhnJ8N9hME1JbcfS6N2ckTJA8grvAceGc 6q+K0WZ2anAq2yBznLEY190o+fZoIfOa7KxO7EEVl7kHk9WyEzcN5ZYR7hhQ8Ve3fT4Q7Omm JKZiuRLr4h0JR2/oXZfGspxaZoOKHZ31w20xiZoJm95j9X2+W60uvLaUZPmkeg/s3F/amLRw PZX29nNQ1DprvH0CDlpHb1qp0w77FxiuLzRKCT5YvtcZV/HyP4Mxd2x0AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrKIsWRmVeSWpSXmKPExsVy+t/xe7rT8phjDf5+ULTYOGM9q8X1L89Z LeYfOcdqsfrjY0aL5sXr2Swmn5rLZHGmO9ei//FrZovz5zewW5xtesNucatBxuJjzz1Wi8u7 5rBZfO49wmgx4/w+Jou1R+6yW1w85Wpxu3EFm8XhN+2sFv+ubWSx2H/Fy+L2bz6LbyceMTqI e3z7OonF4/2NVnaP2Q0XWTx2zrrL7rFpVSebx/65a9g9epvfsXkcfLeHyaNvyypGj82nqz0+ b5IL4I7SsynKLy1JVcjILy6xVYo2tDDSM7S00DMysdQzNDaPtTIyVdK3s0lJzcksSy3St0vQ y3i6spWl4Ld8Rff3NtYGxoNSXYycHBICJhK3bvSwdDFycQgJLGWUeLPlBjNEQkxi0r7t7BC2 sMSfa11sEEWfGCWe3rnB2MXIwcEmoCexY1UhSFxEYA6jxM+ubYwgDrPAWWaJ3SveMIF0Cwsk ShzZ9oANxGYRUJV4PHM2I4jNK2AvcbZxIgvEBnmJ1RsOgG3mFHCQODr/DRvIAiGgmu8z+Ccw 8i1gZFjFKJJaWpybnltspFecmFtcmpeul5yfu4kRGIXbjv3csoOx613wIUYBDkYlHt4DVkyx QqyJZcWVuYcYJTiYlUR451kzxwrxpiRWVqUW5ccXleakFh9iNAW6aSKzlGhyPjBB5JXEG5oa mltYGpobmxubWSiJ83YIHIwREkhPLEnNTk0tSC2C6WPi4JRqYDymd+9u8nmnlIWZFW5lUk3G UvO/W1zVKej6lHTlitt9tmtVN+ccnzfrcc/XLTG1HVcK9/fvW5v8afXqZoEzrT7hUw9zBAl9 nGMj2LJnkZu6vs0+DX9LdweTY53CP7K9vb7NZ0txXnO+4PCS0tS+5/m6yau/h/w6vc+AuYdB qckocYZsbMFcHyWW4oxEQy3mouJEAFTe3TLYAgAA X-CMS-MailID: 20190614095326eucas1p22e27d86d886d7a33acdd59c7f0f6d7d8 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20190614095326eucas1p22e27d86d886d7a33acdd59c7f0f6d7d8 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190614095326eucas1p22e27d86d886d7a33acdd59c7f0f6d7d8 References: <20190614095309.24100-1-l.luba@partner.samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The patch adds description for DT binding for a new Exynos5422 Dynamic Memory Controller device. Acked-by: Krzysztof Kozlowski Reviewed-by: Rob Herring Signed-off-by: Lukasz Luba --- .../memory-controllers/exynos5422-dmc.txt | 75 +++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt diff --git a/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt b/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt new file mode 100644 index 000000000000..3d9bfecf573b --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt @@ -0,0 +1,75 @@ +* Exynos5422 frequency and voltage scaling for Dynamic Memory Controller device + +The Samsung Exynos5422 SoC has DMC (Dynamic Memory Controller) to which the DRAM +memory chips are connected. The driver is to monitor the controller in runtime +and switch frequency and voltage. To monitor the usage of the controller in +runtime, the driver uses the PPMU (Platform Performance Monitoring Unit), which +is able to measure the current load of the memory. +When 'userspace' governor is used for the driver, an application is able to +switch the DMC and memory frequency. + +Required properties for DMC device for Exynos5422: +- compatible: Should be "samsung,exynos5422-dmc". +- clocks : list of clock specifiers, must contain an entry for each + required entry in clock-names for CLK_FOUT_SPLL, CLK_MOUT_SCLK_SPLL, + CLK_FF_DOUT_SPLL2, CLK_FOUT_BPLL, CLK_MOUT_BPLL, CLK_SCLK_BPLL, + CLK_MOUT_MX_MSPLL_CCORE, CLK_MOUT_MX_MSPLL_CCORE_PHY, CLK_MOUT_MCLK_CDREX, +- clock-names : should include "fout_spll", "mout_sclk_spll", "ff_dout_spll2", + "fout_bpll", "mout_bpll", "sclk_bpll", "mout_mx_mspll_ccore", + "mout_mx_mspll_ccore_phy", "mout_mclk_cdrex" entries +- devfreq-events : phandles for PPMU devices connected to this DMC. +- vdd-supply : phandle for voltage regulator which is connected. +- reg : registers of two CDREX controllers. +- operating-points-v2 : phandle for OPPs described in v2 definition. +- device-handle : phandle of the connected DRAM memory device. For more + information please refer to documentation file: + Documentation/devicetree/bindings/ddr/lpddr3.txt +- devfreq-events : phandles of the PPMU events used by the controller. +- samsung,syscon-clk : phandle of the clock register set used by the controller, + these registers are used for enabling a 'pause' feature and are not + exposed by clock framework but they must be used in a safe way. + The register offsets are in the driver code and specyfic for this SoC + type. + +Example: + + ppmu_dmc0_0: ppmu@10d00000 { + compatible = "samsung,exynos-ppmu"; + reg = <0x10d00000 0x2000>; + clocks = <&clock CLK_PCLK_PPMU_DREX0_0>; + clock-names = "ppmu"; + events { + ppmu_event_dmc0_0: ppmu-event3-dmc0_0 { + event-name = "ppmu-event3-dmc0_0"; + }; + }; + }; + + dmc: memory-controller@10c20000 { + compatible = "samsung,exynos5422-dmc"; + reg = <0x10c20000 0x100>, <0x10c30000 0x100>, + clocks = <&clock CLK_FOUT_SPLL>, + <&clock CLK_MOUT_SCLK_SPLL>, + <&clock CLK_FF_DOUT_SPLL2>, + <&clock CLK_FOUT_BPLL>, + <&clock CLK_MOUT_BPLL>, + <&clock CLK_SCLK_BPLL>, + <&clock CLK_MOUT_MX_MSPLL_CCORE>, + <&clock CLK_MOUT_MX_MSPLL_CCORE_PHY>, + <&clock CLK_MOUT_MCLK_CDREX>, + clock-names = "fout_spll", + "mout_sclk_spll", + "ff_dout_spll2", + "fout_bpll", + "mout_bpll", + "sclk_bpll", + "mout_mx_mspll_ccore", + "mout_mx_mspll_ccore_phy", + "mout_mclk_cdrex", + operating-points-v2 = <&dmc_opp_table>; + devfreq-events = <&ppmu_event3_dmc0_0>, <&ppmu_event3_dmc0_1>, + <&ppmu_event3_dmc1_0>, <&ppmu_event3_dmc1_1>; + device-handle = <&samsung_K3QF2F20DB>; + vdd-supply = <&buck1_reg>; + samsung,syscon-clk = <&clock>; + }; -- 2.17.1