From bdc15c654b1a18931f28c48e026bbbb572551c52 Mon Sep 17 00:00:00 2001
From: Nicholas Piggin <npiggin@gmail.com>
Date: Fri, 17 Feb 2017 11:56:32 +1000
Subject: [PATCH] external/mambo: add device tree fixup for POWER9 stop levels

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@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 fdcf14d17fdf..8ed0257d4f7f 100644
--- a/external/mambo/skiboot.tcl
+++ b/external/mambo/skiboot.tcl
@@ -202,6 +202,13 @@ 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
+}
+
 # Init CPUs
 set pir 0
 for { set c 0 } { $c < $mconf(cpus) } { incr c } {