On Fri, Sep 14, 2018 at 01:32:03PM +0000, Christophe Leroy wrote:
> Add description of DT bindings for mpc8xxx-wdt driver which
> handles the CPU watchdog timer on the mpc83xx, mpc86xx and mpc8xx.
>
> Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
> ---
> .../devicetree/bindings/watchdog/mpc8xxx-wdt.txt | 25
> ++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt
>
> diff --git a/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt
> b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt
> new file mode 100644
> index 000000000000..1d99e1e4d306
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt
> @@ -0,0 +1,25 @@
> +* Freescale mpc8xxx watchdog driver (For 83xx, 86xx and 8xx)
> +
> +Required properties:
> +- compatible: Shall contain one of the following:
> + "mpc83xx_wdt" for an mpc83xx
> + "fsl,mpc8610-wdt" for an mpc86xx
> + "fsl,mpc823-wdt" for an mpc8xx
> +- reg: base physical address and length of the area hosting the
> + watchdog registers.
> + On the 83xx, "Watchdog Timer Registers" area: <0x200 0x100>
> + On the 86xx, "Watchdog Timer Registers" area: <0xe4000 0x100>
> + On the 8xx, "General System Interface Unit" area: <0x0 0x10>
> +
Note for Rob: The above has been implemented for several years.
This is merely to document the current implementation.
Maybe "mpc83xx_wdt" should be deprecated and replaced, but I think
that should be a separate patch.
> +Optional properties:
> +- reg: additionnal physical address and length (4) of location of the
s/additionnal/additional/
> + Reset Status Register (called RSTRSCR on the mpc86xx)
> + On the 83xx, it is located at offset 0x910
> + On the 86xx, it is located at offset 0xe0094
> + On the 8xx, it is located at offset 0x288
> +
> +Example:
> + WDT: watchdog@0 {
> + compatible = "fsl,mpc823-wdt";
> + reg = <0x0 0x10 0x288 0x4>;
> + };
> --
> 2.13.3
>
