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authorWolfgang Grandegger <wg@grandegger.com>2009-04-07 12:20:56 +0400
committerKumar Gala <galak@kernel.crashing.org>2009-04-08 09:12:11 +0400
commit8d82ffd15e59febf2c597067a777526958b7f769 (patch)
tree5da1772fff13b56149cf6dd6a2b70604f0de005b /Documentation/powerpc
parent52ce67f157f8c5623524dc6c5b2ddd6a0d2aa774 (diff)
downloadlinux-8d82ffd15e59febf2c597067a777526958b7f769.tar.xz
powerpc: Document new FSL I2C bindings and cleanup
This patch documents the new bindings for the MPC I2C bus driver. Furthermore, it removes obsolete FSL device related definitions for I2C. Signed-off-by: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/dts-bindings/fsl/i2c.txt46
1 files changed, 31 insertions, 15 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/i2c.txt b/Documentation/powerpc/dts-bindings/fsl/i2c.txt
index d0ab33e21fe6..b6d2e21474f9 100644
--- a/Documentation/powerpc/dts-bindings/fsl/i2c.txt
+++ b/Documentation/powerpc/dts-bindings/fsl/i2c.txt
@@ -7,8 +7,10 @@ Required properties :
Recommended properties :
- - compatible : Should be "fsl-i2c" for parts compatible with
- Freescale I2C specifications.
+ - compatible : compatibility list with 2 entries, the first should
+ be "fsl,CHIP-i2c" where CHIP is the name of a compatible processor,
+ e.g. mpc8313, mpc8543, mpc8544, mpc5200 or mpc5200b. The second one
+ should be "fsl-i2c".
- 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
@@ -16,17 +18,31 @@ Recommended properties :
controller you have.
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
- - dfsrr : boolean; if defined, indicates that this I2C device has
- a digital filter sampling rate register
- - fsl5200-clocking : boolean; if defined, indicated that this device
- uses the FSL 5200 clocking mechanism.
-
-Example :
- i2c@3000 {
- interrupt-parent = <40000>;
- interrupts = <1b 3>;
- reg = <3000 18>;
- device_type = "i2c";
- compatible = "fsl-i2c";
- dfsrr;
+ - 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.
+
+Examples :
+
+ i2c@3d00 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c";
+ cell-index = <0>;
+ reg = <0x3d00 0x40>;
+ interrupts = <2 15 0>;
+ interrupt-parent = <&mpc5200_pic>;
+ fsl,preserve-clocking;
};
+
+ i2c@3100 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cell-index = <1>;
+ compatible = "fsl,mpc8544-i2c", "fsl-i2c";
+ reg = <0x3100 0x100>;
+ interrupts = <43 2>;
+ interrupt-parent = <&mpic>;
+ clock-frequency = <400000>;
+ };
+