jz4760: Support dynamic reclocking!

default/low speed is 192 MHz, Max is 576

Downclock PCLK/MCLK/etc to 96MHz to save a bit of juice

Honestly the high speed could be dialed down to, eg 384
as this thing is so bloody fast..

Change-Id: Ie65597c74290f1603e65f69dae8e75b59c8ba0b4

1 files changed, 12 insertions, 2 deletions

diff --git a/firmware/export/config/xduoox3.h b/firmware/export/config/xduoox3.h
index f510495bd9..999b6b9912 100644
--- a/firmware/export/config/xduoox3.h
+++ b/firmware/export/config/xduoox3.h
@@ -148,8 +148,18 @@
 /* Define this if you have a Ingenic JZ4760B */
 #define CONFIG_CPU JZ4760B
 
-/* Define this to the CPU frequency */
-#define CPU_FREQ 480000000    /* CPU clock: 480 MHz -- Keep a multiple of 48MHz! */
+/* We have adjustable frequency */
+#define CPUFREQ_MAX      576000000  // datasheet sez 600MHz max.  Must be multiple of 48!
+#define CPUFREQ_MIN      192000000
+#define CPUFREQ_DEFAULT  CPUFREQ_MIN
+
+#define HAVE_ADJUSTABLE_CPU_FREQ
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+//#define HAVE_GUI_BOOST
+#define CPUFREQ_NORMAL   CPUFREQ_MIN
+#else
+#define CPU_FREQ         CPUFREQ_MAX
+#endif
 
 /* Define this if you want to use the JZ47XX i2c interface */
 #define CONFIG_I2C I2C_JZ47XX