Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs
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Required properties:
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- compatible : "ti,am654-hbmc" for AM654 SoC
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- reg : Two entries:
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First entry pointed to the register space of HBMC controller
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Second entry pointing to the memory map region dedicated for
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MMIO access to attached flash devices
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- ranges : Address translation from offset within CS to allocated MMIO
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space in SoC
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Optional properties:
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- mux-controls : phandle to the multiplexer that controls selection of
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HBMC vs OSPI inside Flash SubSystem (FSS). Default is OSPI,
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if property is absent.
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See Documentation/devicetree/bindings/mux/reg-mux.txt
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for mmio-mux binding details
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Example:
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system-controller@47000000 {
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compatible = "syscon", "simple-mfd";
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reg = <0x0 0x47000000 0x0 0x100>;
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#address-cells = <2>;
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#size-cells = <2>;
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ranges;
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hbmc_mux: multiplexer {
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compatible = "mmio-mux";
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#mux-control-cells = <1>;
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mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */
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};
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};
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hbmc: hyperbus@47034000 {
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compatible = "ti,am654-hbmc";
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reg = <0x0 0x47034000 0x0 0x100>,
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<0x5 0x00000000 0x1 0x0000000>;
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power-domains = <&k3_pds 55>;
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#address-cells = <2>;
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#size-cells = <1>;
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ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
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<0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */
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mux-controls = <&hbmc_mux 0>;
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/* Slave flash node */
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flash@0,0 {
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compatible = "cypress,hyperflash", "cfi-flash";
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reg = <0x0 0x0 0x4000000>;
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};
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};
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