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dt-bindings: mtd: Add bindings for TI's AM654 HyperBus memory controller

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Add binding documentation for TI's HyperBus memory controller present on
AM654 SoC.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Vignesh Raghavendra 2019-06-25 13:27:45 +05:30 committed by Miquel Raynal
parent dcc7d3446a
commit d7865933af
2 changed files with 52 additions and 0 deletions
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Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt Normal file
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Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs
Required properties:
- compatible : "ti,am654-hbmc" for AM654 SoC
- reg : Two entries:
First entry pointed to the register space of HBMC controller
Second entry pointing to the memory map region dedicated for
MMIO access to attached flash devices
- ranges : Address translation from offset within CS to allocated MMIO
space in SoC
Optional properties:
- mux-controls : phandle to the multiplexer that controls selection of
HBMC vs OSPI inside Flash SubSystem (FSS). Default is OSPI,
if property is absent.
See Documentation/devicetree/bindings/mux/reg-mux.txt
for mmio-mux binding details
Example:
system-controller@47000000 {
compatible = "syscon", "simple-mfd";
reg = <0x0 0x47000000 0x0 0x100>;
#address-cells = <2>;
#size-cells = <2>;
ranges;
hbmc_mux: multiplexer {
compatible = "mmio-mux";
#mux-control-cells = <1>;
mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */
};
};
hbmc: hyperbus@47034000 {
compatible = "ti,am654-hbmc";
reg = <0x0 0x47034000 0x0 0x100>,
<0x5 0x00000000 0x1 0x0000000>;
power-domains = <&k3_pds 55>;
#address-cells = <2>;
#size-cells = <1>;
ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
<0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */
mux-controls = <&hbmc_mux 0>;
/* Slave flash node */
flash@0,0 {
compatible = "cypress,hyperflash", "cfi-flash";
reg = <0x0 0x0 0x4000000>;
};
};

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@ -7311,6 +7311,7 @@ S: Supported
F: drivers/mtd/hyperbus/
F: include/linux/mtd/hyperbus.h
F: Documentation/devicetree/bindings/mtd/cypress,hyperflash.txt
F: Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
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