ARM: dts: da850-lcdk: enable cpufreq

Add a fixed regulator for the da850-lcdk board along with board-specific
CPU configuration.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

diff --git a/arch/arm/boot/dts/da850-lcdk.dts b/arch/arm/boot/dts/da850-lcdk.dts
index 26f453d..b36d5e3 100644 (file)
--- a/arch/arm/boot/dts/da850-lcdk.dts
+++ b/arch/arm/boot/dts/da850-lcdk.dts
@@ -155,12 +155,48 @@
                        };
                };
        };
+
+       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";