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| author | Michael Giacomelli <giac2000@hotmail.com> | 2016-03-27 22:46:53 +0200 |
|---|---|---|
| committer | Michael Giacomelli <giac2000@hotmail.com> | 2016-03-27 23:14:51 +0200 |
| commit | 7be692e80612ce180d1dc4c796f6ee0586ec565a (patch) | |
| tree | fdbadbf92805cebb557b080daba8e9b10b7264ee | |
| parent | 775b21ebc45051b51851ee5ed6597c221ed9cede (diff) | |
| download | rockbox-7be692e80612ce180d1dc4c796f6ee0586ec565a.zip rockbox-7be692e80612ce180d1dc4c796f6ee0586ec565a.tar.gz rockbox-7be692e80612ce180d1dc4c796f6ee0586ec565a.tar.bz2 rockbox-7be692e80612ce180d1dc4c796f6ee0586ec565a.tar.xz | |
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
| -rw-r--r-- | firmware/export/config/sansaclipplus.h | 3 | ||||
| -rw-r--r-- | firmware/export/config/sansaclipv2.h | 3 | ||||
| -rw-r--r-- | firmware/export/config/sansaclipzip.h | 3 | ||||
| -rw-r--r-- | firmware/export/config/sansafuzev2.h | 3 | ||||
| -rw-r--r-- | firmware/target/arm/as3525/system-as3525.c | 4 |
5 files changed, 14 insertions, 2 deletions
diff --git a/firmware/export/config/sansaclipplus.h b/firmware/export/config/sansaclipplus.h index 6b84faa..faa2225 100644 --- a/firmware/export/config/sansaclipplus.h +++ b/firmware/export/config/sansaclipplus.h @@ -198,6 +198,9 @@ /* Define this if you have adjustable CPU frequency */ #define HAVE_ADJUSTABLE_CPU_FREQ +/*define this to enable CPU voltage scaling on AMS devices*/ +#define HAVE_ADJUSTABLE_CPU_VOLTAGE + #define BOOTFILE_EXT "sansa" #define BOOTFILE "rockbox." BOOTFILE_EXT #define BOOTDIR "/.rockbox" diff --git a/firmware/export/config/sansaclipv2.h b/firmware/export/config/sansaclipv2.h index 5f6d195..301cfc8 100644 --- a/firmware/export/config/sansaclipv2.h +++ b/firmware/export/config/sansaclipv2.h @@ -194,6 +194,9 @@ /* Define this if you have adjustable CPU frequency */ #define HAVE_ADJUSTABLE_CPU_FREQ +/*define this to enable CPU voltage scaling on AMS devices*/ +#define HAVE_ADJUSTABLE_CPU_VOLTAGE + #define BOOTFILE_EXT "sansa" #define BOOTFILE "rockbox." BOOTFILE_EXT #define BOOTDIR "/.rockbox" diff --git a/firmware/export/config/sansaclipzip.h b/firmware/export/config/sansaclipzip.h index b028dad..ea1c571 100644 --- a/firmware/export/config/sansaclipzip.h +++ b/firmware/export/config/sansaclipzip.h @@ -197,6 +197,9 @@ /* Define this if you have adjustable CPU frequency */ #define HAVE_ADJUSTABLE_CPU_FREQ +/*define this to enable CPU voltage scaling on AMS devices*/ +#define HAVE_ADJUSTABLE_CPU_VOLTAGE + #define BOOTFILE_EXT "sansa" #define BOOTFILE "rockbox." BOOTFILE_EXT #define BOOTDIR "/.rockbox" diff --git a/firmware/export/config/sansafuzev2.h b/firmware/export/config/sansafuzev2.h index 3b4fb22..523a331 100644 --- a/firmware/export/config/sansafuzev2.h +++ b/firmware/export/config/sansafuzev2.h @@ -210,6 +210,9 @@ /* Define this if you have adjustable CPU frequency */ #define HAVE_ADJUSTABLE_CPU_FREQ +/*define this to enable CPU voltage scaling on AMS devices*/ +#define HAVE_ADJUSTABLE_CPU_VOLTAGE + #define BOOTFILE_EXT "sansa" #define BOOTFILE "rockbox." BOOTFILE_EXT #define BOOTDIR "/.rockbox" diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c index 22aa90a..edd80f4 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 |