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Commit 8d82ffd1 authored by Wolfgang Grandegger's avatar Wolfgang Grandegger Committed by Kumar Gala
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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: default avatarWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 52ce67f1

Documentation/powerpc/dts-bindings/fsl/i2c.txt

+31 −15
Original line number Diff line number Diff line
@@ -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>;

	};

include/linux/fsl_devices.h

+0 −4
Original line number Diff line number Diff line
@@ -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,