adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-27 19:26:25 +00:00
Code Issues Projects Releases Packages Wiki Activity

powerpc: Document new FSL I2C bindings and cleanup

Browse source 
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>
This commit is contained in:
Wolfgang Grandegger 2009-04-07 10:20:56 +02:00 committed by Kumar Gala
parent 52ce67f157
commit 8d82ffd15e
2 changed files with 30 additions and 18 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
Documentation/powerpc/dts-bindings/fsl/i2c.txt
View file

@ -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.
- 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.
Example :
i2c@3000 {
interrupt-parent = <40000>;
interrupts = <1b 3>;
reg = <3000 18>;
device_type = "i2c";
compatible = "fsl-i2c";
dfsrr;
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>;
};

4
include/linux/fsl_devices.h
View file

@ -43,10 +43,6 @@
*
*/
/* Flags related to I2C device features */
#define FSL_I2C_DEV_SEPARATE_DFSRR 0x00000001
#define FSL_I2C_DEV_CLOCK_5200 0x00000002
enum fsl_usb2_operating_modes {
FSL_USB2_MPH_HOST,
FSL_USB2_DR_HOST,