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Fri, 14 Jun 2019 09:53:23 +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 05/13] dt-bindings: ddr: add LPDDR3 memories Date: Fri, 14 Jun 2019 11:53:01 +0200 Message-Id: <20190614095309.24100-6-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: H4sIAAAAAAAAA0WSe0hTURzHO/etObkty4Op0SJ7UPamQ0ZWJFz6ozcEldTKi4pu5q4zy/5Y 2sOm66GkopmVhras6TQfEWWmLWa2RuEjNUsJw9eyWaGZ5fVO+u9zvt/v73x/HA6Dy7tJHyZS Hcdr1MpoBeVOVL4cta24rsZDV1375YPKsk0kahnpJVF+/RsS3R/uASi5wEShDGsehl6nqtCV nn4c2WylNGpKGqDRB50vGk77SKJ3j29QyGmoByjb9hRDD+o7aWS3hqD2s8UUejFwkUQTzWUE evZ+B2r/7Yl+vuoGW7y5nz/SCc7Rep7mcnV2gqvJ6aQ5s/ESxT3LK6E5Q/IQxT0feoJxlyuM gCtvTOScZv/dMw+6bwrjoyPjec3KzUfdIwzZjdSJsoCEP33jtA50+euBGwPZdfBRygipB+6M nC0GcKLQiUuHEQBNqfUuxwlg0q9hbHpkqOoVJRlFAFrHvk8ZUyOjjjV6wDAUGwirjbGi7MVm A5j7dZ+Yx9kqHA62dwDRmM1ugWODtbTIBLsIdtTqCZFlbDBsK7hMS2Xz4f3SWlxkt8l8Q/7A VDFkLzHQWtiES6Ht8FrzPULi2bDPUuEa9oV/a/JdWwtQZ7gNJD4De67kuTJB8IXFTopL4+xS aHq8UpK3Qv2XGkyUIesJWwdniTI+iemVWbgky2DKBbmUXgIr0t66iubCopJM1+UcHDaWYtJT ZQA4NubEroL5Of/LbgFgBN68VlCF88JaNX8yUFCqBK06PPB4jMoMJn9e44TlRzV4On6sDrAM UHjIajdioXJSGS+cUtUByOAKL9nNIDxULgtTnjrNa2KOaLTRvFAH5jGEwluWOOPTITkbrozj o3j+BK+ZdjHGzUcHmnV+bz6Zi9rKs86lKFru2tItmoY5pd/X3zmwa16ENWwk3iEE39zQUK7p VHvtX9A1mJaCbH29hvbdn8PTWxb7lHhcONx/1MFYvj00248YfTNVC7Eo73Htkz2xWiq5yiPE 0bOtuu3weOzSgAT73spEedPO4haVf8wqv+WOssIhE6sghAjl6mW4RlD+A6z9UHJ1AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrKIsWRmVeSWpSXmKPExsVy+t/xe7pT8phjDW6/VrHYOGM9q8X1L89Z LeYfOcdqsfrjY0aL5sXr2Swmn5rLZHGmO9ei//FrZovz5zewW5xtesNucatBxuJjzz1Wi8u7 5rBZfO49wmgx4/w+Jou1R+6yW1w85Wpxu3EFm8XhN+2sFv+ubWSx2H/Fy+L2bz6LbyceMTqI e3z7OonF4/2NVnaP2Q0XWTx2zrrL7rFpVSebx/65a9g9epvfsXkcfLeHyaNvyypGj82nqz0+ b5IL4I7SsynKLy1JVcjILy6xVYo2tDDSM7S00DMysdQzNDaPtTIyVdK3s0lJzcksSy3St0vQ y+idcZqtYKNaxd9Xf9gbGO/LdTFyckgImEi8236CrYuRi0NIYCmjxJ8T55ghEmISk/ZtZ4ew hSX+XOuCKvrEKPHxVR9LFyMHB5uAnsSOVYUgcRGBOYwSP7u2MYI4zAJnmSV2r3jDBNItLOAg 8evtAbBJLAKqEncOdLGA2LwC9hI3F/dBbZCXWL3hANhmTqD6o/PfsIEsEAKq+T6DfwIj3wJG hlWMIqmlxbnpucWGesWJucWleel6yfm5mxiBUbjt2M/NOxgvbQw+xCjAwajEw3vAiilWiDWx rLgy9xCjBAezkgjvPGvmWCHelMTKqtSi/Pii0pzU4kOMpkA3TWSWEk3OByaIvJJ4Q1NDcwtL Q3Njc2MzCyVx3g6BgzFCAumJJanZqakFqUUwfUwcnFINjKlnHp0SytxbqtSh4ssdZKXyh0G2 tKv9U7SM8pYnqxK/8u/7FvqmSUDrcVnTtvgL3/dJpzWI7uXhTxRqL5q3Vu5T/0GLrZ+3m2ny 6fxb6PPqpOpWxuk5DEFJr55d0o9taX5dt0r78rbs1liuCwx7uCxer7rw9/bdt7eOrWNh+KuX xbGwnn9vshJLcUaioRZzUXEiAMZaAnHYAgAA X-CMS-MailID: 20190614095324eucas1p247ee87a9ca69733e7aebd601f5d96a94 X-Msg-Generator: CA X-RootMTR: 20190614095324eucas1p247ee87a9ca69733e7aebd601f5d96a94 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190614095324eucas1p247ee87a9ca69733e7aebd601f5d96a94 References: <20190614095309.24100-1-l.luba@partner.samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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>; + }; +}