Regarding Level/Edge of Interrupt sense values

Regarding Level/Edge of Interrupt sense values

[Vijay Nikam]

Hello,

I created a device node for gpio-controller for evaluation board
mpc83313erdb. I created the dtb and loaded on target and the interrupt
is generated successfully.

But in dts at interrupts = <74 0x2> I set sense as Edge (sense== 2:
Edge, high-to-low change),  when I load the driver module and checked
the entry in /proc/interrupts it shows the sense as Level i.e. 8
(sense == 8: Level, low assertion) as follows;

74:          1   IPIC   Level     gpio

Following is gpio-controller device tree node;

gpio-controller@c00 {
		#gpio-cells = <2>;
		compatible = "fsl,mpc8313-gpio", "fsl,mpc8349-gpio";
		reg = <0xc00 0x100>;
		interrupts = <74 0x2>;
		interrupt-parent = <&ipic>;
		gpio-controller;
                              };

Could anyone please tell what could be the reason ? ? ? Am I missing
something ? ? ?

Kindly please acknowledge ... thank you ...

Kind Regards,
Vijay Nikam

##################### Start ############################
cat /proc/interrupts

          CPU0
 16:        162   IPIC   Level     serial
 19:         43   IPIC   Level     i2c-mpc
 20:          1   IPIC   Level     i2c-mpc
 22:          2   IPIC   Edge      phy_interrupt
 32:          0   IPIC   Level     enet_error
 33:        765   IPIC   Level     enet_rx
 34:          3   IPIC   Level     enet_tx
 35:          0   IPIC   Level     enet_error
 36:          0   IPIC   Level     enet_rx
 37:         15   IPIC   Level     enet_tx
 38:          0   IPIC   Edge      ehci_hcd:usb1
 72:          0   IPIC   Level     gtm timer
 74:          1   IPIC   Level     gpio
 77:      51451   IPIC   Level     fsl-elbc
 80:          0   IPIC   Level     pmc
BAD:          0
###################### END ############################

Re: Regarding Level/Edge of Interrupt sense values

[Scott Wood]

On Mon, Feb 23, 2009 at 05:27:53PM +0530, Vijay Nikam wrote:
> Hello,

Sorry for the late reply; I just noticed this sitting in my inbox.

> I created a device node for gpio-controller for evaluation board
> mpc83313erdb. I created the dtb and loaded on target and the interrupt
> is generated successfully.
> 
> But in dts at interrupts = <74 0x2> I set sense as Edge (sense== 2:
> Edge, high-to-low change),  when I load the driver module and checked
> the entry in /proc/interrupts it shows the sense as Level i.e. 8
> (sense == 8: Level, low assertion) as follows;
> 
> 74:          1   IPIC   Level     gpio

Internal interrupts are inherently level-triggered.  The sense/trigger of
the gpio interrupt itself (as configured in the IPIC) has nothing to do
with the sense/trigger of the gpio *pin* (as configured in the GPIO
block).

-Scott