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Sansa AMS: Disable voltage scaling for now until we found a way to make it reliable for everyone, it's causing problems with storage for many people.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21687 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-07-06 13:13:47 +00:00
parent a306e90f21
commit c292a8eb1f
1 changed files with 4 additions and 3 deletions
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7
firmware/target/arm/as3525/system-as3525.c
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@ -329,13 +329,14 @@ void set_cpu_frequency(long frequency)
{
if(frequency == CPUFREQ_MAX)
{
#ifdef HAVE_ADJUSTABLE_CPU_VOLTAGE
/* Increasing frequency so boost voltage before change */
ascodec_write(AS3514_CVDD_DCDC3, (AS314_CP_DCDC3_SETTING | CVDD_1_20));
/* Wait for voltage to be at least 1.20v before making fclk > 200 MHz */
while(adc_read(ADC_CVDD) < 480) /* 480 * .0025 = 1.20V */
;
#endif
asm volatile(
"mrc p15, 0, r0, c1, c0 \n"
@ -358,10 +359,10 @@ void set_cpu_frequency(long frequency)
"bic r0, r0, #3<<30 \n" /* fastbus clocking */
"mcr p15, 0, r0, c1, c0 \n"
: : : "r0" );
#ifdef HAVE_ADJUSTABLE_CPU_VOLTAGE
/* Decreasing frequency so reduce voltage after change */
ascodec_write(AS3514_CVDD_DCDC3, (AS314_CP_DCDC3_SETTING | CVDD_1_10));
#endif
cpu_frequency = CPUFREQ_NORMAL;
}
}