linux-kernel - [PATCH v2 1/5] ARM: zynq: DT: Add 'clock-latency' property

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Date:	Fri,  4 Apr 2014 16:14:12 -0700
From:	Soren Brinkmann <soren.brinkmann@...inx.com>
To:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Michal Simek <michal.simek@...inx.com>
Cc:	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Mike Looijmans <mike.looijmans@...ic.nl>
Subject: [PATCH v2 1/5] 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@...ic.nl>
Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
Tested-by: Mike Looijmans <mike.looijmans@...ic.nl>
Signed-off-by: Michal Simek <michal.simek@...inx.com>
---
This is a fix from our vendor tree

Changes in v2:
 - This patch has been added

---
 arch/arm/boot/dts/zynq-7000.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
index 789d0bacc110..20a13cba65a3 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
-- 
1.9.1.1.gbb9f595

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