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Wed, 21 Aug 2019 10:43:17 +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, mark.rutland@arm.com, robh+dt@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 v13 2/8] dt-bindings: ddr: add LPDDR3 memories Date: Wed, 21 Aug 2019 12:42:57 +0200 Message-Id: <20190821104303.32079-3-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190821104303.32079-1-l.luba@partner.samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSa1CMYRTHPfte22nNa4XjFtYwruU25nEZYlye8cGYCR80YfFOpXbLvoow ZlnXVSFNorJkyGybLppUE6V2RKXk1tII5bKzym3TjMFiexfffuec//n/zzzz8JT6EzOMj9Jv Fw16bYyGVdKlt781TV0+Ojx8mss5BxdlFDC4tecdgy32Jgbnfe5E2HSxgMWn6rMVuPGYDh/v fE/h5uZCDt/b38XhZ8YR+HNSO4MfVmSx2J1sRzij+aYC59ufc/hSa4sCt9QvxW37rrD44A07 h2u7DjPY86SIxlWPVuC27/1x750OFDKU2M7ZEOn9mkqTj46DHMk0ttCk/OxzjhRbj7KkKtvG kWTTB5bc+lCpICklVkSuNewm7uLAVf7rlPO3iDFRCaIheMFGZWRyRgMbVzR+50/XD86IXgSa kR8PwiyorKllzUjJq4UrCF7fuuErehA4O9IouXAjSHd/RGbE96007tsm93MRnHQ70L+N7O63 fSJWCIIy6zZvRICQgSDTGerVUMIrClLys5B3MFBYACntXxgv08I46LGk97FKWAiWtExavm8U 5BVWU172E0LAc+Iu4zUC4QIPrxxtlHzREnj8YrWsHwiuuhJO5hHwq9yikFkCY/IFJPMe6Dye 7dPMg9q6FsZrQwkToaAiWG4vgpL6HEZ27w+O7gHeNvUHU0tP+0JVcOSQWlZPgJKk+76gwZBr S/eZE8jx5Pue8BSCXkc1fQKNOvs/7DxCVjREjJd0EaI0Qy/uCJK0OileHxG0OVZXjP78wwZP XU8ZqvixqQYJPNL4q8qehoWrGW2ClKirQcBTmgDVzqx14WrVFm3iLtEQu8EQHyNKNWg4T2uG qHb3exmmFiK028VoUYwTDX+nCt5vmBEdDU2LTNy7VYDmkJxWTc65VXbF17wgDKlR0ctYK0o4 9qZh6GzPmY6AkSbTgZFjnF2XmhpdsfujJn9f7CxNW7po9ZwplcHUmfa3l7vWF1omx4XN6J4b ekRZ3FhlWRhpJrZq84Hocv/xSabc6ysfEG3g3ZV3yKA19NqwqzNd7fqxRENLkdrpkyiDpP0N VCdrOYMDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrCIsWRmVeSWpSXmKPExsVy+t/xe7ruCrGxBhu3MFlsnLGe1eL6l+es FvOPnGO1WP3xMaNF8+L1bBaTT81lsjjTnWvR//g1s8X58xvYLc42vWG3uNUgY/Gx5x6rxeVd c9gsPvceYbSYcX4fk8XaI3fZLZZev8hkcfGUq8XtxhVsFq17j7BbHH7Tzmrx79pGFov9V7ws bv/ms/h24hGjg6THmnlrGD2+fZ3E4vH+Riu7x+yGiyweO2fdZffYtKqTzWP/3DXsHr3N79g8 Dr7bw+TRt2UVo8fm09UenzfJBfBE6dkU5ZeWpCpk5BeX2CpFG1oY6RlaWugZmVjqGRqbx1oZ mSrp29mkpOZklqUW6dsl6GX0zjjNVrBRreLvqz/sDYz35boYOTgkBEwkzjQWdjFycQgJLGWU WLntCmMXIydQXExi0r7t7BC2sMSfa11sEEWfGCW+ze1gA2lmE9CT2LEKrFlEYA6jxM+ubYwg DrPAb2aJg3f7wbqFBewk+u59YgWxWQRUJb7MnwZm8wrYS8yfMpsFYoO8xOoNB5hBbE4BB4l/ E06C1QgB1Uzd8JZ1AiPfAkaGVYwiqaXFuem5xUZ6xYm5xaV56XrJ+bmbGIExuu3Yzy07GLve BR9iFOBgVOLh3XEzOlaINbGsuDL3EKMEB7OSCG/FnKhYId6UxMqq1KL8+KLSnNTiQ4ymQEdN ZJYSTc4Hpo+8knhDU0NzC0tDc2NzYzMLJXHeDoGDMUIC6YklqdmpqQWpRTB9TBycUg2MOnNs S59YTOf80THJQfdoRlpCqOTqYIFjT79OzEy8sFzzwazHJ4oFs43KjcrXGe6/x+ThtaktwPXS HE6V2dsXa/J12UnW391lYjPL4MDCa/Mv3cqIi1/AsJKnpF3oxjG5ay55xfbxvzLq2mdOOpS3 p4zr22czFcWDd5VEGTYnXu7MvLCvqPCWEktxRqKhFnNRcSIAFojHLucCAAA= X-CMS-MailID: 20190821104319eucas1p10db51f7a181cae024465cc775292d2b1 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20190821104319eucas1p10db51f7a181cae024465cc775292d2b1 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190821104319eucas1p10db51f7a181cae024465cc775292d2b1 References: <20190821104303.32079-1-l.luba@partner.samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Specifies the AC timing parameters of the LPDDR3 memory device. Reviewed-by: Rob Herring Signed-off-by: Lukasz Luba --- .../bindings/ddr/lpddr3-timings.txt | 58 +++++++++++ .../devicetree/bindings/ddr/lpddr3.txt | 97 +++++++++++++++++++ 2 files changed, 155 insertions(+) create mode 100644 Documentation/devicetree/bindings/ddr/lpddr3-timings.txt create mode 100644 Documentation/devicetree/bindings/ddr/lpddr3.txt diff --git a/Documentation/devicetree/bindings/ddr/lpddr3-timings.txt b/Documentation/devicetree/bindings/ddr/lpddr3-timings.txt new file mode 100644 index 000000000000..84705e50a3fd --- /dev/null +++ b/Documentation/devicetree/bindings/ddr/lpddr3-timings.txt @@ -0,0 +1,58 @@ +* AC timing parameters of LPDDR3 memories for a given speed-bin. + +The structures are based on LPDDR2 and extended where needed. + +Required properties: +- compatible : Should be "jedec,lpddr3-timings" +- min-freq : minimum DDR clock frequency for the speed-bin. Type is +- reg : maximum DDR clock frequency for the speed-bin. Type is + +Optional properties: + +The following properties represent AC timing parameters from the memory +data-sheet of the device for a given speed-bin. All these properties are +of type and the default unit is ps (pico seconds). +- tRFC +- tRRD +- tRPab +- tRPpb +- tRCD +- tRC +- tRAS +- tWTR +- tWR +- tRTP +- tW2W-C2C +- tR2R-C2C +- tFAW +- tXSR +- tXP +- tCKE +- tCKESR +- tMRD + +Example: + +timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@800000000 { + compatible = "jedec,lpddr3-timings"; + reg = <800000000>; /* workaround: it shows max-freq */ + min-freq = <100000000>; + tRFC = <65000>; + tRRD = <6000>; + tRPab = <12000>; + tRPpb = <12000>; + tRCD = <10000>; + tRC = <33750>; + tRAS = <23000>; + tWTR = <3750>; + tWR = <7500>; + tRTP = <3750>; + tW2W-C2C = <0>; + tR2R-C2C = <0>; + tFAW = <25000>; + tXSR = <70000>; + tXP = <3750>; + tCKE = <3750>; + tCKESR = <3750>; + tMRD = <7000>; +}; diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt new file mode 100644 index 000000000000..3b2485b84b3f --- /dev/null +++ b/Documentation/devicetree/bindings/ddr/lpddr3.txt @@ -0,0 +1,97 @@ +* LPDDR3 SDRAM memories compliant to JEDEC JESD209-3C + +Required properties: +- compatible : Should be - "jedec,lpddr3" +- density : representing density in Mb (Mega bits) +- io-width : representing bus width. Possible values are 8, 16, 32, 64 +- #address-cells: Must be set to 1 +- #size-cells: Must be set to 0 + +Optional properties: + +The following optional properties represent the minimum value of some AC +timing parameters of the DDR device in terms of number of clock cycles. +These values shall be obtained from the device data-sheet. +- tRFC-min-tck +- tRRD-min-tck +- tRPab-min-tck +- tRPpb-min-tck +- tRCD-min-tck +- tRC-min-tck +- tRAS-min-tck +- tWTR-min-tck +- tWR-min-tck +- tRTP-min-tck +- tW2W-C2C-min-tck +- tR2R-C2C-min-tck +- tWL-min-tck +- tDQSCK-min-tck +- tRL-min-tck +- tFAW-min-tck +- tXSR-min-tck +- tXP-min-tck +- tCKE-min-tck +- tCKESR-min-tck +- tMRD-min-tck + +Child nodes: +- The lpddr3 node may have one or more child nodes of type "lpddr3-timings". + "lpddr3-timings" provides AC timing parameters of the device for + a given speed-bin. Please see Documentation/devicetree/ + bindings/ddr/lpddr3-timings.txt for more information on "lpddr3-timings" + +Example: + +samsung_K3QF2F20DB: lpddr3 { + compatible = "Samsung,K3QF2F20DB", "jedec,lpddr3"; + density = <16384>; + io-width = <32>; + #address-cells = <1>; + #size-cells = <0>; + + tRFC-min-tck = <17>; + tRRD-min-tck = <2>; + tRPab-min-tck = <2>; + tRPpb-min-tck = <2>; + tRCD-min-tck = <3>; + tRC-min-tck = <6>; + tRAS-min-tck = <5>; + tWTR-min-tck = <2>; + tWR-min-tck = <7>; + tRTP-min-tck = <2>; + tW2W-C2C-min-tck = <0>; + tR2R-C2C-min-tck = <0>; + tWL-min-tck = <8>; + tDQSCK-min-tck = <5>; + tRL-min-tck = <14>; + tFAW-min-tck = <5>; + tXSR-min-tck = <12>; + tXP-min-tck = <2>; + tCKE-min-tck = <2>; + tCKESR-min-tck = <2>; + tMRD-min-tck = <5>; + + timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@800000000 { + compatible = "jedec,lpddr3-timings"; + reg = <800000000>; /* workaround: it shows max-freq */ + min-freq = <100000000>; + tRFC = <65000>; + tRRD = <6000>; + tRPab = <12000>; + tRPpb = <12000>; + tRCD = <10000>; + tRC = <33750>; + tRAS = <23000>; + tWTR = <3750>; + tWR = <7500>; + tRTP = <3750>; + tW2W-C2C = <0>; + tR2R-C2C = <0>; + tFAW = <25000>; + tXSR = <70000>; + tXP = <3750>; + tCKE = <3750>; + tCKESR = <3750>; + tMRD = <7000>; + }; +} -- 2.17.1