rockchip: Allow socs with undefined wfe check bits
Some older socs like the rk3288 do not have the necessary registers
to check the wfi/wfe state of the cpu cores. Allow this case an "just"
do an additional delay similar to how the Linux kernel handles smp
right now.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Change-Id: I0f67af388b06b8bfb4a9bac411b4900ac266a77a
diff --git a/plat/rockchip/common/drivers/pmu/pmu_com.h b/plat/rockchip/common/drivers/pmu/pmu_com.h
index 4b4b00f..5359f73 100644
--- a/plat/rockchip/common/drivers/pmu/pmu_com.h
+++ b/plat/rockchip/common/drivers/pmu/pmu_com.h
@@ -88,6 +88,17 @@
cluster_id = 0;
}
+ /*
+ * wfe/wfi tracking not possible, hopefully the host
+ * was sucessful in enabling wfe/wfi.
+ * We'll give a bit of additional time, like the kernel does.
+ */
+ if ((cluster_id && clstb_cpu_wfe < 0) ||
+ (!cluster_id && clstl_cpu_wfe < 0)) {
+ mdelay(1);
+ return 0;
+ }
+
if (cluster_id)
wfie_msk <<= (clstb_cpu_wfe + cpu_id);
else