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authorOctav Zlatior <octav.zlatior@theobroma-systems.com>2015-05-11 17:34:31 +0200
committerKlaus Goger <klaus.goger@theobroma-systems.com>2015-07-30 18:53:00 +0200
commitef7be38dda56059775c96408938657123b7cc8f8 (patch)
tree9b96866afb0e31e9f3bf6479c1d92e32cf9d1e52
parente9e3fcffe8f77bd1f3f583eec624307568b6ae1e (diff)
ARM: sun6i: set cpu operating points and ramp-rate
* operating points for different frequencies with voltages set to optimize power consumption * clock latency and ramp-rate: these values seem to provide enough time for the voltage to adjust before frequency changes Signed-off-by: Octav Zlatior <octav.zlatior@theobroma-systems.com>
-rw-r--r--arch/arm/boot/dts/sun6i-a31-pangolin.dts24
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/arm/boot/dts/sun6i-a31-pangolin.dts b/arch/arm/boot/dts/sun6i-a31-pangolin.dts
index 249f4b1b600..06024744bb9 100644
--- a/arch/arm/boot/dts/sun6i-a31-pangolin.dts
+++ b/arch/arm/boot/dts/sun6i-a31-pangolin.dts
@@ -81,14 +81,17 @@
&cpu0 {
cpu-supply = <&vdd_cpu>;
operating-points = <
- /* kHz uV */
- 1008000 1200000
- 864000 1200000
- 720000 1100000
- 480000 1000000
- 240000 1000000
- 120000 1000000
+ /* kHz uV */
+ 1200000 1320000
+ 1080000 1220000
+ 832000 1120000
+ 600000 1020000
+ 480000 980000
+ 360000 980000
+ 240000 980000
+ 120000 940000
>;
+ clock-latency = <300000>;
};
&ehci0 {
@@ -127,7 +130,7 @@
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins_a>;
/* pull-ups and devices require AXP221 DLDO3 */
- status = "failed";
+ status = "okay";
};
&i2c1 {
@@ -238,10 +241,11 @@
};
vdd_cpu: dcdc3 {
- regulator-min-microvolt = <900000>;
- regulator-max-microvolt = <1300000>;
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-name = "vdd-cpu";
+ regulator-ramp-delay = <50>;
};
vdd_system: dcdc4 {