From: Soren Brinkmann <soren.brinkmann@xilinx.com>
Date: Fri, 4 Apr 2014 23:14:12 +0000 (-0700)
Subject: ARM: zynq: DT: Add 'clock-latency' property
X-Git-Tag: firefly_0821_release~176^2~3923^2~10^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b2bf5d484848450e7aa3332e268c5e874d9dc523;p=firefly-linux-kernel-4.4.55.git

ARM: zynq: DT: Add 'clock-latency' property

Specify the 'clock-latency' property to avoid certain cpufreq governors
from refusing to work with the following error:
  ondemand governor failed, too long transition latency of HW, fallback to performance governor

Reported-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
index 511180769af5..c39baefcfd76 100644
--- a/arch/arm/boot/dts/zynq-7000.dtsi
+++ b/arch/arm/boot/dts/zynq-7000.dtsi
@@ -24,6 +24,7 @@
 			device_type = "cpu";
 			reg = <0>;
 			clocks = <&clkc 3>;
+			clock-latency = <1000>;
 			operating-points = <
 				/* kHz    uV */
 				666667  1000000