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AMS Sansa: Lower ADC checkvalue for voltage scaling to 1.175V as some players run slightly low.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23205 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2009-10-16 17:44:23 +00:00
parent af8cc7d35f
commit 000cff5bae
1 changed files with 3 additions and 3 deletions
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6
firmware/target/arm/as3525/system-as3525.c
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@ -338,9 +338,9 @@ void set_cpu_frequency(long frequency)
/* 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 */
;
/* Some players run a bit low so use 1.175 volts instead of 1.20 */
/* Wait for voltage to be at least 1.175v before making fclk > 200 MHz */
while(adc_read(ADC_CVDD) < 470); /* 470 * .0025 = 1.175V */
asm volatile(
"mrc p15, 0, r0, c1, c0 \n"