Enable voltage scaling on AMSv2.

Voltage is reduced when the CPU is unboosted, resulting in a large
reduction in power consumption. In analogy with the AMSv1 voltage
scaling code (currently disabled due to problems with SD cards),
I have defined a config file option to enable/disable it.

Change-Id: Ia89c31ec06dd012354b4d53435e7b5b36243b206

1 files changed, 2 insertions, 2 deletions

diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c
index 22aa90aad6..edd80f4fb2 100644
--- a/firmware/target/arm/as3525/system-as3525.c
+++ b/firmware/target/arm/as3525/system-as3525.c
@@ -460,7 +460,7 @@ void set_cpu_frequency(long frequency)
 {
     if(frequency == CPUFREQ_MAX)
     {
-#if 0
+#ifdef HAVE_ADJUSTABLE_CPU_VOLTAGE
         /* Set CVDD1 power supply */
         ascodec_write_pmu(0x17, 1, 0x80 | 47);
         /* dely for voltage rising */
@@ -481,7 +481,7 @@ void set_cpu_frequency(long frequency)
         cpu_frequency = CPUFREQ_NORMAL;
 
         /* Set CVDD1 power supply */
-#if 0
+#ifdef HAVE_ADJUSTABLE_CPU_VOLTAGE
 #ifdef SANSA_CLIPZIP
         ascodec_write_pmu(0x17, 1, 0x80 | 19);
 #else