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102 lines
2.8 KiB
102 lines
2.8 KiB
OMAP SSI controller bindings |
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OMAP3's Synchronous Serial Interface (SSI) controller implements a |
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legacy variant of MIPI's High Speed Synchronous Serial Interface (HSI), |
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while the controller found inside OMAP4 is supposed to be fully compliant |
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with the HSI standard. |
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Required properties: |
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- compatible: Should include "ti,omap3-ssi" or "ti,omap4-hsi" |
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- reg-names: Contains the values "sys" and "gdd" (in this order). |
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- reg: Contains a matching register specifier for each entry |
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in reg-names. |
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- interrupt-names: Contains the value "gdd_mpu". |
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- interrupts: Contains matching interrupt information for each entry |
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in interrupt-names. |
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- ranges: Represents the bus address mapping between the main |
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controller node and the child nodes below. |
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- clock-names: Must include the following entries: |
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"ssi_ssr_fck": The OMAP clock of that name |
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"ssi_sst_fck": The OMAP clock of that name |
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"ssi_ick": The OMAP clock of that name |
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- clocks: Contains a matching clock specifier for each entry in |
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clock-names. |
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- #address-cells: Should be set to <1> |
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- #size-cells: Should be set to <1> |
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Each port is represented as a sub-node of the ti,omap3-ssi device. |
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Required Port sub-node properties: |
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- compatible: Should be set to the following value |
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ti,omap3-ssi-port (applicable to OMAP34xx devices) |
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ti,omap4-hsi-port (applicable to OMAP44xx devices) |
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- reg-names: Contains the values "tx" and "rx" (in this order). |
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- reg: Contains a matching register specifier for each entry |
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in reg-names. |
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- interrupts: Should contain interrupt specifiers for mpu interrupts |
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0 and 1 (in this order). |
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- ti,ssi-cawake-gpio: Defines which GPIO pin is used to signify CAWAKE |
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events for the port. This is an optional board-specific |
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property. If it's missing the port will not be |
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enabled. |
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Optional properties: |
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- ti,hwmods: Shall contain TI interconnect module name if needed |
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by the SoC |
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Example for Nokia N900: |
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ssi-controller@48058000 { |
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compatible = "ti,omap3-ssi"; |
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/* needed until hwmod is updated to use the compatible string */ |
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ti,hwmods = "ssi"; |
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reg = <0x48058000 0x1000>, |
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<0x48059000 0x1000>; |
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reg-names = "sys", |
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"gdd"; |
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interrupts = <55>; |
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interrupt-names = "gdd_mpu"; |
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clocks = <&ssi_ssr_fck>, |
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<&ssi_sst_fck>, |
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<&ssi_ick>; |
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clock-names = "ssi_ssr_fck", |
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"ssi_sst_fck", |
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"ssi_ick"; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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ranges; |
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ssi-port@4805a000 { |
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compatible = "ti,omap3-ssi-port"; |
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reg = <0x4805a000 0x800>, |
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<0x4805a800 0x800>; |
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reg-names = "tx", |
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"rx"; |
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interrupt-parent = <&intc>; |
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interrupts = <67>, |
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<68>; |
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ti,ssi-cawake-gpio = <&gpio5 23 GPIO_ACTIVE_HIGH>; /* 151 */ |
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} |
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ssi-port@4805a000 { |
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compatible = "ti,omap3-ssi-port"; |
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reg = <0x4805b000 0x800>, |
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<0x4805b800 0x800>; |
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reg-names = "tx", |
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"rx"; |
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interrupt-parent = <&intc>; |
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interrupts = <69>, |
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<70>; |
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} |
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}
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