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5200/mpc: improve i2c bus error recovery

PATCH In review Albrecht Dreß 2 participants 2 messages Feb 17, 2010 Documentation

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Albrecht Dreß

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PATCH v2 2/2 5200/mpc: improve i2c bus error recovery

Make the I2C adapter timeout configurable through a Device Tree property which gives the timeout in microseconds.

Change vs. v.1: use "fsl,timeout" as property name (Thanks, Grant)

Signed-off-by Albrecht Dreß <[email protected]>

---

Documentation/powerpc/dts-bindings/fsl/i2c.txt +2 -0
@@ -21,6 +21,7 @@ Recommended properties :
  - 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 :
 

@@ -44,5 +45,6 @@ Examples :
 		interrupts = <43 2>;
 		interrupt-parent = <&mpic>;
 		clock-frequency = <400000>;
+		fsl,timeout = <10000>;
 	};
Acked-by on v2 2/2
#1 lore raw
Quoted 6 lines · Albrecht Dreß

Make the I2C adapter timeout configurable through a Device Tree property which gives the timeout in microseconds.

Change vs. v.1: use "fsl,timeout" as property name (Thanks, Grant)

Signed-off-by Albrecht Dreß <[email protected]>
Acked-by Grant Likely <[email protected]>
Quoted 23 lines

---

--- linux-2.6.32-orig/Documentation/powerpc/dts-bindings/fsl/i2c.txt

 2009-12-03 04:51:21.000000000 +0100

+++ linux-2.6.32/Documentation/powerpc/dts-bindings/fsl/i2c.txt 2010-02-17 14:18:01.000000000 +0100

(quoted diff) +0 -0
@@ -21,6 +21,7 @@ Recommended properties :

 - 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 :

Documentation/powerpc/dts-bindings/fsl/i2c.txt +1 -0
@@ -44,5 +45,6 @@ Examples :
                interrupts = <43 2>;
                interrupt-parent = <&mpic>;
                clock-frequency = <400000>;
+               fsl,timeout = <10000>;
        };
Signature · 2 lines
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.