MPC5200: How to share GPIO and watchdog

Juergen Beisert jbe at pengutronix.de
Thu Oct 16 01:42:04 EST 2008


Hi list,

the timer0 on the MPC5200B contains one GPIO and a timer/watchdog.

If I'm using this node:

timer at 600 {	/* General Purpose Timer */
    compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt";
    cell-index = <0>;
    reg = <0x600 0x10>;
    interrupts = <0x1 0x9 0x0>;
    interrupt-parent = <&mpc5200_pic>;
   fsl,has-wdt;
};

I will get watchdog support.

If I'm using this node:

timer at 600 {	/* General Purpose Timer */
    compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt","fsl,mpc5200b-gpt-gpio","fsl,mpc5200-gpt-gpio";
    cell-index = <0>;
    reg = <0x600 0x10>;
    interrupts = <0x1 0x9 0x0>;
    interrupt-parent = <&mpc5200_pic>;
    gpio-controller;
    #gpio-cells = <2>;
    fsl,has-wdt;
};

I will get GPIO support, but no longer watchdog support (watchdogs probe
function will never be called).

Is there a way to get both features supported?

Regards,
Juergen

-- 
Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de
 Pengutronix - Linux Solutions for Science and Industry
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