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Marvell Device bus (localbus) configuration.

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1. Properties for localbus nodes

1.1 ranges

Property: ranges

Value type: <prop-encoded-array> encoded as arbitrary number of localbus

nodes specifiers.

Description: ranges property defines values used for mapping devices

connected to localbus, in Marvell devices it is used also for

setting decoding windows.

a) child node address-cells:

- first cell: number of bank (chip select)

- second cell: (Marvell devices) Target ID for decoding

windows setup

b) parent node address cells:

- address offset: used with parent's node base address to

specify base address of mapped device

c) child node size-cells:

- size: defines amount of memory that should be reserved for

device

1.2 bank-count

Property: bank-count

Value type: <u32>

Description: The bank_count property defines maximum number of banks on

localbus node. Bank is most often interpreted as device chip

select, but may also describe another device (e.g. SPI flash).

1.3 Example

localbus@0 {

#address-cells = <2>;

#size-cells = <1>;

compatible = "mrvl,lbc";

bank-count = <5>;

/* This reflects CPU decode windows setup. */

ranges = <0x0 0x2f 0xb2200000 0x00100000

0x1 0x3e 0xb2100000 0x00100000

0x2 0x3d 0xb0000000 0x02000000

0x3 0x3b 0xb2000000 0x00100000>;

};

2. Properties for localbus consumer nodes:

2.1 reg

Property: reg

Value type: <prop-encoded-array>

Description: A standard property required for localbus child nodes. Defines

the device memory region.

a) first cell: number of bank (chip select)

b) address offset: used with address offset from parent's ranges

for corresponding bank to specify base address of

the device

c) size: defines size of the device memory region

2.2 Example

nor@0,0 {

#address-cells = <1>;

#size-cells = <1>;

compatible = "cfi-flash";

reg = <0x0 0x0 0x00100000>;

};