powerpc/of-device-tree: Factor MTD physmap bindings out of booting-without-of
It's easier to find bindings descriptions in separate files. So factor out the MTD physmap bindings into a separate file to not clutter booting-without-of.txt more. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Stefan Roese
Grant Likely
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@ -43,12 +43,11 @@ Table of Contents
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2) Representing devices without a current OF specification
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a) PHY nodes
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b) Interrupt controllers
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c) CFI or JEDEC memory-mapped NOR flash
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d) 4xx/Axon EMAC ethernet nodes
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e) Xilinx IP cores
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f) USB EHCI controllers
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g) MDIO on GPIOs
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h) SPI busses
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c) 4xx/Axon EMAC ethernet nodes
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d) Xilinx IP cores
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e) USB EHCI controllers
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f) MDIO on GPIOs
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g) SPI busses
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VII - Marvell Discovery mv64[345]6x System Controller chips
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1) The /system-controller node
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@ -999,7 +998,7 @@ compatibility.
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translation of SOC addresses for memory mapped SOC registers.
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- bus-frequency: Contains the bus frequency for the SOC node.
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Typically, the value of this field is filled in by the boot
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loader.
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loader.
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Recommended properties:
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@ -1287,71 +1286,7 @@ platforms are moved over to use the flattened-device-tree model.
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device_type = "open-pic";
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};
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c) CFI or JEDEC memory-mapped NOR flash
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Flash chips (Memory Technology Devices) are often used for solid state
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file systems on embedded devices.
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- compatible : should contain the specific model of flash chip(s)
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used, if known, followed by either "cfi-flash" or "jedec-flash"
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- reg : Address range of the flash chip
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- bank-width : Width (in bytes) of the flash bank. Equal to the
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device width times the number of interleaved chips.
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- device-width : (optional) Width of a single flash chip. If
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omitted, assumed to be equal to 'bank-width'.
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- #address-cells, #size-cells : Must be present if the flash has
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sub-nodes representing partitions (see below). In this case
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both #address-cells and #size-cells must be equal to 1.
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For JEDEC compatible devices, the following additional properties
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are defined:
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- vendor-id : Contains the flash chip's vendor id (1 byte).
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- device-id : Contains the flash chip's device id (1 byte).
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In addition to the information on the flash bank itself, the
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device tree may optionally contain additional information
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describing partitions of the flash address space. This can be
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used on platforms which have strong conventions about which
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portions of the flash are used for what purposes, but which don't
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use an on-flash partition table such as RedBoot.
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Each partition is represented as a sub-node of the flash device.
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Each node's name represents the name of the corresponding
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partition of the flash device.
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Flash partitions
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- reg : The partition's offset and size within the flash bank.
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- label : (optional) The label / name for this flash partition.
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If omitted, the label is taken from the node name (excluding
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the unit address).
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- read-only : (optional) This parameter, if present, is a hint to
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Linux that this flash partition should only be mounted
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read-only. This is usually used for flash partitions
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containing early-boot firmware images or data which should not
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be clobbered.
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Example:
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flash@ff000000 {
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compatible = "amd,am29lv128ml", "cfi-flash";
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reg = <ff000000 01000000>;
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bank-width = <4>;
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device-width = <1>;
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#address-cells = <1>;
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#size-cells = <1>;
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fs@0 {
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label = "fs";
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reg = <0 f80000>;
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};
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firmware@f80000 {
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label ="firmware";
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reg = <f80000 80000>;
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read-only;
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};
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};
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d) 4xx/Axon EMAC ethernet nodes
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c) 4xx/Axon EMAC ethernet nodes
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The EMAC ethernet controller in IBM and AMCC 4xx chips, and also
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the Axon bridge. To operate this needs to interact with a ths
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@ -1499,7 +1434,7 @@ platforms are moved over to use the flattened-device-tree model.
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available.
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For Axon: 0x0000012a
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e) Xilinx IP cores
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d) Xilinx IP cores
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The Xilinx EDK toolchain ships with a set of IP cores (devices) for use
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in Xilinx Spartan and Virtex FPGAs. The devices cover the whole range
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@ -1761,7 +1696,7 @@ platforms are moved over to use the flattened-device-tree model.
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listed above, nodes for these devices should include a phy-handle
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property, and may include other common network device properties
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like local-mac-address.
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iv) Xilinx Uartlite
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Xilinx uartlite devices are simple fixed speed serial ports.
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@ -1793,7 +1728,7 @@ platforms are moved over to use the flattened-device-tree model.
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- reg-offset : A value of 3 is required
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- reg-shift : A value of 2 is required
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f) USB EHCI controllers
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e) USB EHCI controllers
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Required properties:
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- compatible : should be "usb-ehci".
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@ -1819,7 +1754,7 @@ platforms are moved over to use the flattened-device-tree model.
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big-endian;
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};
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g) MDIO on GPIOs
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f) MDIO on GPIOs
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Currently defined compatibles:
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- virtual,gpio-mdio
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@ -1839,7 +1774,7 @@ platforms are moved over to use the flattened-device-tree model.
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&qe_pio_c 6>;
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};
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h) SPI (Serial Peripheral Interface) busses
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g) SPI (Serial Peripheral Interface) busses
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SPI busses can be described with a node for the SPI master device
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and a set of child nodes for each SPI slave on the bus. For this
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63
Documentation/powerpc/dts-bindings/mtd-physmap.txt
Normal file
63
Documentation/powerpc/dts-bindings/mtd-physmap.txt
Normal file
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@ -0,0 +1,63 @@
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CFI or JEDEC memory-mapped NOR flash
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Flash chips (Memory Technology Devices) are often used for solid state
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file systems on embedded devices.
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- compatible : should contain the specific model of flash chip(s)
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used, if known, followed by either "cfi-flash" or "jedec-flash"
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- reg : Address range of the flash chip
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- bank-width : Width (in bytes) of the flash bank. Equal to the
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device width times the number of interleaved chips.
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- device-width : (optional) Width of a single flash chip. If
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omitted, assumed to be equal to 'bank-width'.
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- #address-cells, #size-cells : Must be present if the flash has
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sub-nodes representing partitions (see below). In this case
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both #address-cells and #size-cells must be equal to 1.
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For JEDEC compatible devices, the following additional properties
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are defined:
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- vendor-id : Contains the flash chip's vendor id (1 byte).
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- device-id : Contains the flash chip's device id (1 byte).
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In addition to the information on the flash bank itself, the
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device tree may optionally contain additional information
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describing partitions of the flash address space. This can be
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used on platforms which have strong conventions about which
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portions of the flash are used for what purposes, but which don't
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use an on-flash partition table such as RedBoot.
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Each partition is represented as a sub-node of the flash device.
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Each node's name represents the name of the corresponding
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partition of the flash device.
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Flash partitions
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- reg : The partition's offset and size within the flash bank.
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- label : (optional) The label / name for this flash partition.
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If omitted, the label is taken from the node name (excluding
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the unit address).
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- read-only : (optional) This parameter, if present, is a hint to
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Linux that this flash partition should only be mounted
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read-only. This is usually used for flash partitions
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containing early-boot firmware images or data which should not
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be clobbered.
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Example:
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flash@ff000000 {
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compatible = "amd,am29lv128ml", "cfi-flash";
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reg = <ff000000 01000000>;
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bank-width = <4>;
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device-width = <1>;
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#address-cells = <1>;
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#size-cells = <1>;
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fs@0 {
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label = "fs";
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reg = <0 f80000>;
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};
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firmware@f80000 {
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label ="firmware";
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reg = <f80000 80000>;
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read-only;
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};
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};
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