linux-kernel - [PATCH] ARM: zynq: dt: Add a fixed regulator for CPU voltage

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Message-Id: <1399064852-19569-1-git-send-email-soren.brinkmann@xilinx.com>
Date:	Fri,  2 May 2014 14:07:32 -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, git@...inx.com,
	Soren Brinkmann <soren.brinkmann@...inx.com>
Subject: [PATCH] ARM: zynq: dt: Add a fixed regulator for CPU voltage

To silence the warning
	cpufreq_cpu0: failed to get cpu0 regulator: -19
from the cpufreq driver regarding a missing regulator,
add a fixed regulator to the DT.
Zynq does not support voltage scaling and the CPU rail should always be
supplied with 1 V, hence it is added in the SOC-level dtsi.

Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
---

 arch/arm/boot/dts/zynq-7000.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
index c1176abc34d9..64779f9d5c38 100644
--- a/arch/arm/boot/dts/zynq-7000.dtsi
+++ b/arch/arm/boot/dts/zynq-7000.dtsi
@@ -25,6 +25,7 @@
 			reg = <0>;
 			clocks = <&clkc 3>;
 			clock-latency = <1000>;
+			cpu0-supply = <&regulator_vccpint>;
 			operating-points = <
 				/* kHz    uV */
 				666667  1000000
@@ -48,6 +49,15 @@
 		reg = < 0xf8891000 0x1000 0xf8893000 0x1000 >;
 	};
 
+	regulator_vccpint: fixedregulator@0 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCCPINT";
+		regulator-min-microvolt = <1000000>;
+		regulator-max-microvolt = <1000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
 	amba {
 		compatible = "simple-bus";
 		#address-cells = <1>;
-- 
1.9.2.1.g06c4abd

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