[Skiboot] [PATCH] external/mambo: add device tree fixup for POWER9 stop levels

[Vaidyanathan Srinivasan]

* Nicholas Piggin <npiggin at gmail.com> [2017-02-17 11:56:32]:

> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Reviewed-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>

> ---
>  external/mambo/skiboot.tcl | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/external/mambo/skiboot.tcl b/external/mambo/skiboot.tcl
> index ccd23ffe..ae648f8b 100644
> --- a/external/mambo/skiboot.tcl
> +++ b/external/mambo/skiboot.tcl
> @@ -205,6 +205,13 @@ set reg [list $fake_nvram_start $fake_nvram_size ]
>  mysim of addprop $fake_nvram_node array64 "reg" reg
>  mysim of addprop $fake_nvram_node empty "name" "ibm,fake-nvram"
>  
> +# Allow P9 to use all idle states
> +if { $default_config == "P9" } {
> +    set opal_node [mysim of addchild $root_node "ibm,opal" ""]
> +    set power_mgt_node [mysim of addchild $opal_node "power-mgt" ""]
> +    mysim of addprop $power_mgt_node int "ibm,enabled-stop-levels" 0xffffffff
> +}
> +

Thanks for the patch, we could limit the enabled stop states to the
ones that are actually enabled in h/w and workable in mambo.  I will
test and adjust this mask if required.

--Vaidy