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| author | Grant Likely <grant.likely@secretlab.ca> | 2011-01-26 10:10:40 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-01-31 00:09:01 -0700 |
| commit | d524dac9279b6a41ffdf7ff7958c577f2e387db6 (patch) | |
| tree | 294166d18a1c89c4cebb2571ea7b124876fb01ef /Documentation/devicetree/bindings/i2c | |
| parent | 1bae4ce27c9c90344f23c65ea6966c50ffeae2f5 (diff) | |
| download | blackbird-op-linux-d524dac9279b6a41ffdf7ff7958c577f2e387db6.tar.gz blackbird-op-linux-d524dac9279b6a41ffdf7ff7958c577f2e387db6.zip | |
dt: Move device tree documentation out of powerpc directory
The device tree is used by more than just PowerPC. Make the documentation
directory available to all.
v2: reorganized files while moving to create arch and driver specific
directories.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/devicetree/bindings/i2c')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/fsl-i2c.txt | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/fsl-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-i2c.txt new file mode 100644 index 000000000000..1eacd6b20ed5 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/fsl-i2c.txt @@ -0,0 +1,64 @@ +* I2C + +Required properties : + + - reg : Offset and length of the register set for the device + - compatible : should be "fsl,CHIP-i2c" where CHIP is the name of a + compatible processor, e.g. mpc8313, mpc8543, mpc8544, mpc5121, + mpc5200 or mpc5200b. For the mpc5121, an additional node + "fsl,mpc5121-i2c-ctrl" is required as shown in the example below. + +Recommended properties : + + - interrupts : <a b> where a is the interrupt number and b is a + field that represents an encoding of the sense and level + information for the interrupt. This should be encoded based on + the information in section 2) depending on the type of interrupt + controller you have. + - interrupt-parent : the phandle for the interrupt controller that + services interrupts for this device. + - fsl,preserve-clocking : boolean; if defined, the clock settings + from the bootloader are preserved (not touched). + - clock-frequency : desired I2C bus clock frequency in Hz. + - fsl,timeout : I2C bus timeout in microseconds. + +Examples : + + /* MPC5121 based board */ + i2c@1740 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,mpc5121-i2c", "fsl-i2c"; + reg = <0x1740 0x20>; + interrupts = <11 0x8>; + interrupt-parent = <&ipic>; + clock-frequency = <100000>; + }; + + i2ccontrol@1760 { + compatible = "fsl,mpc5121-i2c-ctrl"; + reg = <0x1760 0x8>; + }; + + /* MPC5200B based board */ + i2c@3d00 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c"; + reg = <0x3d00 0x40>; + interrupts = <2 15 0>; + interrupt-parent = <&mpc5200_pic>; + fsl,preserve-clocking; + }; + + /* MPC8544 base board */ + i2c@3100 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,mpc8544-i2c", "fsl-i2c"; + reg = <0x3100 0x100>; + interrupts = <43 2>; + interrupt-parent = <&mpic>; + clock-frequency = <400000>; + fsl,timeout = <10000>; + }; |
