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Fix the voltage and clock levels for cpufreq on RPi 2.

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Submitted by:	Daisuke Aoyama <aoyama@peach.ne.jp>
This commit is contained in:
Luiz Otavio O Souza 2015-05-04 00:01:35 +00:00
parent 3077c104f5
commit 11cede4873
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=282403
1 changed files with 41 additions and 16 deletions
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57
sys/arm/broadcom/bcm2835/bcm2835_cpufreq.c
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@ -1,5 +1,5 @@
/*-
* Copyright (C) 2013-2014 Daisuke Aoyama <aoyama@peach.ne.jp>
* Copyright (C) 2013-2015 Daisuke Aoyama <aoyama@peach.ne.jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -60,21 +60,28 @@ __FBSDID("$FreeBSD$");
#define DPRINTF(fmt, ...)
#endif
#define HZ2MHZ(freq) ((freq) / (1000 * 1000))
#define MHZ2HZ(freq) ((freq) * (1000 * 1000))
#define OFFSET2MVOLT(val) (1200 + ((val) * 25))
#define MVOLT2OFFSET(val) (((val) - 1200) / 25)
#define HZ2MHZ(freq) ((freq) / (1000 * 1000))
#define MHZ2HZ(freq) ((freq) * (1000 * 1000))
#define DEFAULT_ARM_FREQUENCY 700
#define DEFAULT_CORE_FREQUENCY 250
#define DEFAULT_SDRAM_FREQUENCY 400
#define DEFAULT_LOWEST_FREQ 300
#define TRANSITION_LATENCY 1000
#define MIN_OVER_VOLTAGE -16
#define MAX_OVER_VOLTAGE 6
#define MSG_ERROR -999999999
#define MHZSTEP 100
#define HZSTEP (MHZ2HZ(MHZSTEP))
#ifdef SOC_BCM2836
#define OFFSET2MVOLT(val) (((val) / 1000))
#define MVOLT2OFFSET(val) (((val) * 1000))
#define DEFAULT_ARM_FREQUENCY 600
#define DEFAULT_LOWEST_FREQ 600
#else
#define OFFSET2MVOLT(val) (1200 + ((val) * 25))
#define MVOLT2OFFSET(val) (((val) - 1200) / 25)
#define DEFAULT_ARM_FREQUENCY 700
#define DEFAULT_LOWEST_FREQ 300
#endif
#define DEFAULT_CORE_FREQUENCY 250
#define DEFAULT_SDRAM_FREQUENCY 400
#define TRANSITION_LATENCY 1000
#define MIN_OVER_VOLTAGE -16
#define MAX_OVER_VOLTAGE 6
#define MSG_ERROR -999999999
#define MHZSTEP 100
#define HZSTEP (MHZ2HZ(MHZSTEP))
#define TZ_ZEROC 2732
#define VC_LOCK(sc) do { \
@ -1740,6 +1747,23 @@ bcm2835_cpufreq_make_freq_list(device_t dev, struct cf_setting *sets,
if (min_freq > cpufreq_lowest_freq)
min_freq = cpufreq_lowest_freq;
#ifdef SOC_BCM2836
/* XXX RPi2 have only 900/600MHz */
idx = 0;
volts = sc->min_voltage_core;
sets[idx].freq = freq;
sets[idx].volts = volts;
sets[idx].lat = TRANSITION_LATENCY;
sets[idx].dev = dev;
idx++;
if (freq != min_freq) {
sets[idx].freq = min_freq;
sets[idx].volts = volts;
sets[idx].lat = TRANSITION_LATENCY;
sets[idx].dev = dev;
idx++;
}
#else
/* from freq to min_freq */
for (idx = 0; idx < *count && freq >= min_freq; idx++) {
if (freq > sc->arm_min_freq)
@ -1752,7 +1776,8 @@ bcm2835_cpufreq_make_freq_list(device_t dev, struct cf_setting *sets,
sets[idx].dev = dev;
freq -= MHZSTEP;
}
*count = ++idx;
#endif
*count = idx;
return (0);
}