From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../bindings/memory-controllers/ti/emif.txt | 84 ++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 Documentation/devicetree/bindings/memory-controllers/ti/emif.txt (limited to 'Documentation/devicetree/bindings/memory-controllers/ti/emif.txt') diff --git a/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt new file mode 100644 index 000000000..63f674ffe --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt @@ -0,0 +1,84 @@ +* EMIF family of TI SDRAM controllers + +EMIF - External Memory Interface - is an SDRAM controller used in +TI SoCs. EMIF supports, based on the IP revision, one or more of +DDR2/DDR3/LPDDR2 protocols. This binding describes a given instance +of the EMIF IP and memory parts attached to it. Certain revisions +of the EMIF controller also contain optional ECC support, which +corrects one bit errors and detects two bit errors. + +Required properties: +- compatible : Should be of the form "ti,emif-" where + is the IP revision of the specific EMIF instance. For newer controllers, + compatible should be one of the following: + "ti,emif-am3352" + "ti,emif-am4372" + "ti,emif-dra7xx" + "ti,emif-keystone" + +- phy-type : indicating the DDR phy type. Following are the + allowed values + <1> : Attila PHY + <2> : Intelli PHY + +- device-handle : phandle to a "lpddr2" node representing the memory part + +- ti,hwmods : For TI hwmods processing and omap device creation + the value shall be "emif" where is the number of the EMIF + instance with base 1. +- interrupts : interrupt used by the controller + +Required only for "ti,emif-am3352" and "ti,emif-am4372": +- sram : Phandles for generic sram driver nodes, + first should be type 'protect-exec' for the driver to use to copy + and run PM functions, second should be regular pool to be used for + data region for code. See Documentation/devicetree/bindings/sram/sram.yaml + for more details. + +Optional properties: +- cs1-used : Have this property if CS1 of this EMIF + instance has a memory part attached to it. If there is a memory + part attached to CS1, it should be the same type as the one on CS0, + so there is no need to give the details of this memory part. + +- cal-resistor-per-cs : Have this property if the board has one + calibration resistor per chip-select. + +- hw-caps-read-idle-ctrl: Have this property if the controller + supports read idle window programming + +- hw-caps-dll-calib-ctrl: Have this property if the controller + supports dll calibration control + +- hw-caps-ll-interface : Have this property if the controller + has a low latency interface and corresponding interrupt events + +- hw-caps-temp-alert : Have this property if the controller + has capability for generating SDRAM temperature alerts + +-Examples: + +emif1: emif@4c000000 { + compatible = "ti,emif-4d"; + ti,hwmods = "emif2"; + phy-type = <1>; + device-handle = <&elpida_ECB240ABACN>; + cs1-used; + hw-caps-read-idle-ctrl; + hw-caps-ll-interface; + hw-caps-temp-alert; +}; + +/* From am33xx.dtsi */ +emif: emif@4c000000 { + compatible = "ti,emif-am3352"; + reg = <0x4C000000 0x1000>; + sram = <&pm_sram_code + &pm_sram_data>; +}; + +emif1: emif@4c000000 { + compatible = "ti,emif-dra7xx"; + reg = <0x4c000000 0x200>; + interrupts = ; +}; -- cgit v1.2.3