Merge tag 'davinci-for-v5.3/dt' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci into arm/dt

This pull request adds CPUFreq support for DA850 boards in device-tree
boot using the generic CPUFREQ_DT driver.

* tag 'davinci-for-v5.3/dt' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
  ARM: davinci_all_defconfig: Enable CPUFREQ_DT
  ARM: dts: da850-evm: enable cpufreq
  ARM: dts: da850-lcdk: enable cpufreq
  ARM: dts: da850-lego-ev3: enable cpufreq
  ARM: dts: da850: add cpu node and operating points to DT

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/da850-lcdk.dts b/arch/arm/boot/dts/da850-lcdk.dts
index 2fd2a6838dab..e379d6e7ad49 100644
--- a/arch/arm/boot/dts/da850-lcdk.dts
+++ b/arch/arm/boot/dts/da850-lcdk.dts
@@ -154,12 +154,48 @@
 			};
 		};
 	};
+
+	cvdd: regulator0 {
+		compatible = "regulator-fixed";
+		regulator-name = "cvdd";
+		regulator-min-microvolt = <1300000>;
+		regulator-max-microvolt = <1300000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
 };
 
 &ref_clk {
 	clock-frequency = <24000000>;
 };
 
+&cpu {
+	cpu-supply = <&cvdd>;
+};
+
+/*
+ * LCDK has a fixed CVDD of 1.3V, so only operating points >= 300MHz are
+ * valid. Unfortunately due to a problem with the DA8XX OHCI controller, we
+ * can't enable more than one OPP by default, since the controller sometimes
+ * becomes unresponsive after a transition. Fix the frequency at 456 MHz.
+ */
+
+&opp_100 {
+	status = "disabled";
+};
+
+&opp_200 {
+	status = "disabled";
+};
+
+&opp_300 {
+	status = "disabled";
+};
+
+&opp_456 {
+	status = "okay";
+};
+
 &pmx_core {
 	status = "okay";