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Mon, 6 May 2019 15:12:13 +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 Cc: 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, willy.mh.wolff.ml@gmail.com, Lukasz Luba Subject: [PATCH v7 05/13] dt-bindings: ddr: add LPDDR3 memories Date: Mon, 6 May 2019 17:11:53 +0200 Message-Id: <1557155521-30949-6-git-send-email-l.luba@partner.samsung.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1557155521-30949-1-git-send-email-l.luba@partner.samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSaUwTURj07Xa3S7XNUoy8CGJSYzwSQQ0mz2rwjhtUYvSPQRItsgGVcnSp iHhUtByVKmqCcqloolgxyCFiY2osBTyQFoUARYWIiHITijco6xb9NzPfzDdfXh6Fy2uI2dT+ mARWE6OKVpASUWXtd/uShhBH2NLzRQiVXi4hUIurh0BXbQ0EujPSBdDF5wUYqj+jRue6+nBk t98To5cp/WLk1Pmi1+Z8Eo0abQBdtlswdNf2VozaTxaRqLo/jUCPm4JR+08Z+vL0PVjrxXwZ uyBi8nSNIuZh7lsxU2bKIBnjqUGSeTL4CGPOVpgAU/4imRkt89vuESpZHcFG7z/EagKC9kqi 2nQOIm5o/uHbz8pIHbjrZwAeFKQDYcmNFNwAJJScLgIw87qZFIgLwLTuDpFARgEc+tRDTEX0 rbliYXALwMHG+9i/yLfP9klCUSTtD6tM8XxgJp0M37Q8/tuB0/0YfPnjm4j3eNFrYG/eCd4j oudDU5NTzGMpHQzLm8dJocwPtjVk4Dz2oLfA8XQr4PdA+p0Y9gxbcMG0Edr6eoCAvWBvXYVY wL7w98OrmIA5qDMWuj1HYde5ArdnFayuayT4e3B6ESwxBwjyOug8PQh4GdIy2Drgycv4JLxQ eQkXZClMT5UL7oWwItPhLpoFbxVnu5czMMNmA8LrXAHQmN5JZIG5uf/LrgFgAt6sllNHstzy GDbRn1OpOW1MpP++WHUZmPxcLybqXFXA/CvcCmgKKGZIs9Y7wuSE6hCXpLYCSOGKmVLVx4Yw uTRClXSE1cTu0WijWc4KfCiRwluaPK1zt5yOVCWwB1k2jtVMTTHKY7YOrHQEla7/wIYo68dv WpdOSxxINGdXPzAW7JrjLM5pPv5mg/eCHdh0V07UtcJis6ch88dA7+2a6Bas+4BsZWh9/LOA n/k7thqPjflY51m3yPR6y6tgRdSmJKDf2TYh8VzUF68PNHQ4lLX6bGVO6gpl1vC2zZb0kfNt gVpXuNOi/KoQcVGqZYtxDaf6A9vhVpNYAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrOIsWRmVeSWpSXmKPExsVy+t/xu7pn/S7EGLxsMbfYOGM9q8X1L89Z LeYfOcdqsfrjY0aLyafmMlmc6c616H/8mtni/PkN7BZnm96wW9xqkLG4vGsOm8Xn3iOMFjPO 72OyWHvkLrvF7cYVbBaH37SzWuy/4mVx+zefxbcTjxgdhD2+fZ3E4jG74SKLx85Zd9k9Nq3q ZPPobX7H5nHw3R4mj74tqxg9Np+u9vi8SS6AM0rPpii/tCRVISO/uMRWKdrQwkjP0NJCz8jE Us/Q2DzWyshUSd/OJiU1J7MstUjfLkEv42bDBdaC96oVK09uYmtgXCvXxcjJISFgItF6YxZ7 FyMXh5DAUkaJu2uXs0EkxCQm7dvODmELS/y51sUGUfSJUeLixLusXYwcHGwCehI7VhWC1IgI 1Ev0v7kEVsMs0MAssWb7VbAaYQF7iVez60FqWARUJVZduQU2k1fAS2Lz1b9Qu+Qkbp7rZAax OQW8Jf52HGIEsYWAavZ9/M0ygZFvASPDKkaR1NLi3PTcYkO94sTc4tK8dL3k/NxNjMBI2nbs 5+YdjJc2Bh9iFOBgVOLhfWB7IUaINbGsuDL3EKMEB7OSCG/is3MxQrwpiZVVqUX58UWlOanF hxhNgY6ayCwlmpwPjPK8knhDU0NzC0tDc2NzYzMLJXHeDoGDMUIC6YklqdmpqQWpRTB9TByc Ug2MZldfph+w2jV33vaUOT9WPpgjOEd6gV2tVmv7fsfiac63E/QaV/nr+hRI/9u5McH0dluK /7MVWw+/e8sbLvJ4/51F2fsvvjh1YLqyxaNP2/cur+A99+vX55U7lT67ZB+2abtx1OaQkVbq jPhSicK7izZLdZuWlG3/ZyGbJHjprktN6k8z2WeMNUosxRmJhlrMRcWJAMP+RKy6AgAA X-CMS-MailID: 20190506151214eucas1p17114a7dce506c77ae0bb96b93fd2d838 X-Msg-Generator: CA X-RootMTR: 20190506151214eucas1p17114a7dce506c77ae0bb96b93fd2d838 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190506151214eucas1p17114a7dce506c77ae0bb96b93fd2d838 References: <1557155521-30949-1-git-send-email-l.luba@partner.samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Specifies the AC timing parameters of the LPDDR3 memory device. Signed-off-by: Lukasz Luba Reviewed-by: Rob Herring --- .../devicetree/bindings/ddr/lpddr3-timings.txt | 58 +++++++++++++ Documentation/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 0000000..3a2ef3a --- /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@0 { + 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 0000000..0dc86a3 --- /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@0 { + 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>; + }; +}