From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aneesh V Subject: [RFC v3 PATCH 2/3] dt: device tree bindings for TI's EMIF sdram controller Date: Thu, 19 Jan 2012 20:02:00 +0530 Message-ID: <1326983521-373-3-git-send-email-aneesh@ti.com> References: <1326983521-373-1-git-send-email-aneesh@ti.com> Return-path: In-Reply-To: <1326983521-373-1-git-send-email-aneesh@ti.com> Sender: linux-omap-owner@vger.kernel.org To: devicetree-discuss@lists.ozlabs.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Aneesh V , Rajendra Nayak , Benoit Cousson , Olof Johansson List-Id: devicetree@vger.kernel.org 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. Cc: Rajendra Nayak Cc: Benoit Cousson Cc: Olof Johansson Signed-off-by: Aneesh V --- Changes in RFC v3: * Fixed review comments from RFC v2 --- .../bindings/memory-controllers/ti/emif.txt | 49 ++++++++++++++++++++ 1 files changed, 49 insertions(+), 0 deletions(-) create mode 100644 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 0000000..2925add --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt @@ -0,0 +1,49 @@ +* 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. + +Required properties: +- compatible : Should be of the form "ti,emif-" where + is the IP revision of the specific EMIF instance. + +- 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 + attached to this EMIF instance. + +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-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 + +Example: + +emif1: emif@0x4c000000 { + 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; +}; -- 1.7.1