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authorLinus Torvalds <[email protected]>2022-03-23 18:23:13 -0700
committerLinus Torvalds <[email protected]>2022-03-23 18:23:13 -0700
commitb4bc93bd76d4da32600795cd323c971f00a2e788 (patch)
tree8aebc8ae647d83ffa091c89bb164e7c24b0edfa9 /Documentation/devicetree/bindings/memory-controllers/ddr/lpddr3.txt
parentbaaa68a9796ef2cadfe5caaf4c730412eda0f31c (diff)
parent339ac71b233ee9ab5036be3abca0e5df793b5f64 (diff)
Merge tag 'arm-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM driver updates from Arnd Bergmann: "There are a few separately maintained driver subsystems that we merge through the SoC tree, notable changes are: - Memory controller updates, mainly for Tegra and Mediatek SoCs, and clarifications for the memory controller DT bindings - SCMI firmware interface updates, in particular a new transport based on OPTEE and support for atomic operations. - Cleanups to the TEE subsystem, refactoring its memory management For SoC specific drivers without a separate subsystem, changes include - Smaller updates and fixes for TI, AT91/SAMA5, Qualcomm and NXP Layerscape SoCs. - Driver support for Microchip SAMA5D29, Tesla FSD, Renesas RZ/G2L, and Qualcomm SM8450. - Better power management on Mediatek MT81xx, NXP i.MX8MQ and older NVIDIA Tegra chips" * tag 'arm-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (154 commits) ARM: spear: fix typos in comments soc/microchip: fix invalid free in mpfs_sys_controller_delete soc: s4: Add support for power domains controller dt-bindings: power: add Amlogic s4 power domains bindings ARM: at91: add support in soc driver for new SAMA5D29 soc: mediatek: mmsys: add sw0_rst_offset in mmsys driver data dt-bindings: memory: renesas,rpc-if: Document RZ/V2L SoC memory: emif: check the pointer temp in get_device_details() memory: emif: Add check for setup_interrupts dt-bindings: arm: mediatek: mmsys: add support for MT8186 dt-bindings: mediatek: add compatible for MT8186 pwrap soc: mediatek: pwrap: add pwrap driver for MT8186 SoC soc: mediatek: mmsys: add mmsys reset control for MT8186 soc: mediatek: mtk-infracfg: Disable ACP on MT8192 soc: ti: k3-socinfo: Add AM62x JTAG ID soc: mediatek: add MTK mutex support for MT8186 soc: mediatek: mmsys: add mt8186 mmsys routing table soc: mediatek: pm-domains: Add support for mt8186 dt-bindings: power: Add MT8186 power domains soc: mediatek: pm-domains: Add support for mt8195 ...
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-* LPDDR3 SDRAM memories compliant to JEDEC JESD209-3C
-
-Required properties:
-- compatible : Should be "<vendor>,<type>", and generic value "jedec,lpddr3".
- Example "<vendor>,<type>" values:
- "samsung,K3QF2F20DB"
-
-- density : <u32> representing density in Mb (Mega bits)
-- io-width : <u32> 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:
-
-- manufacturer-id : <u32> Manufacturer ID value read from Mode Register 5
-- revision-id : <u32 u32> Revision IDs read from Mode Registers 6 and 7
-
-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/memory-controllers/ddr/lpddr3-timings.txt
- for more information on "lpddr3-timings"
-
-Example:
-
-samsung_K3QF2F20DB: lpddr3 {
- compatible = "samsung,K3QF2F20DB", "jedec,lpddr3";
- density = <16384>;
- io-width = <32>;
- manufacturer-id = <1>;
- revision-id = <123 234>;
- #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";
- /* workaround: 'reg' shows max-freq */
- reg = <800000000>;
- 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>;
- };
-}