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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-07-21 00:55:14 -0400 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-07-21 00:55:14 -0400 |
commit | 908cf4b925e419bc74f3297b2f0e51d6f8a81da2 (patch) | |
tree | 6c2da79366d4695a9c2560ab18259eca8a2a25b4 /Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt | |
parent | 92c49890922d54cba4b1eadeb0b185773c2c9570 (diff) | |
parent | 14b395e35d1afdd8019d11b92e28041fad591b71 (diff) |
Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next
Diffstat (limited to 'Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt')
-rw-r--r-- | Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt b/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt new file mode 100644 index 000000000000..87bc6048667e --- /dev/null +++ b/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt | |||
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1 | * I2C | ||
2 | |||
3 | The I2C controller is expressed as a bus under the CPM node. | ||
4 | |||
5 | Properties: | ||
6 | - compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c" | ||
7 | - reg : On CPM2 devices, the second resource doesn't specify the I2C | ||
8 | Parameter RAM itself, but the I2C_BASE field of the CPM2 Parameter RAM | ||
9 | (typically 0x8afc 0x2). | ||
10 | - #address-cells : Should be one. The cell is the i2c device address with | ||
11 | the r/w bit set to zero. | ||
12 | - #size-cells : Should be zero. | ||
13 | - clock-frequency : Can be used to set the i2c clock frequency. If | ||
14 | unspecified, a default frequency of 60kHz is being used. | ||
15 | The following two properties are deprecated. They are only used by legacy | ||
16 | i2c drivers to find the bus to probe: | ||
17 | - linux,i2c-index : Can be used to hard code an i2c bus number. By default, | ||
18 | the bus number is dynamically assigned by the i2c core. | ||
19 | - linux,i2c-class : Can be used to override the i2c class. The class is used | ||
20 | by legacy i2c device drivers to find a bus in a specific context like | ||
21 | system management, video or sound. By default, I2C_CLASS_HWMON (1) is | ||
22 | being used. The definition of the classes can be found in | ||
23 | include/i2c/i2c.h | ||
24 | |||
25 | Example, based on mpc823: | ||
26 | |||
27 | i2c@860 { | ||
28 | compatible = "fsl,mpc823-i2c", | ||
29 | "fsl,cpm1-i2c"; | ||
30 | reg = <0x860 0x20 0x3c80 0x30>; | ||
31 | interrupts = <16>; | ||
32 | interrupt-parent = <&CPM_PIC>; | ||
33 | fsl,cpm-command = <0x10>; | ||
34 | #address-cells = <1>; | ||
35 | #size-cells = <0>; | ||
36 | |||
37 | rtc@68 { | ||
38 | compatible = "dallas,ds1307"; | ||
39 | reg = <0x68>; | ||
40 | }; | ||
41 | }; | ||