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exynos3: power HAL: add support for interactive governor

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completely kanged from d2 power HAL

Change-Id: I4f6c32165251ae76c97afb715dde1fee9544430b
This commit is contained in:
jt1134 2012-10-19 23:17:48 -05:00
parent 81c2e053c0
commit 88fda93e73
1 changed files with 70 additions and 9 deletions
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79
exynos3/s5pc110/power/power.c
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@ -20,14 +20,15 @@
#include <sys/stat.h>
#include <fcntl.h>
#define LOG_TAG "PowerHAL"
#include <cutils/properties.h>
#define LOG_TAG "S5PC110 PowerHAL"
#include <utils/Log.h>
#include <hardware/hardware.h>
#include <hardware/power.h>
#define BOOSTPULSE_PATH "/sys/devices/system/cpu/cpufreq/ondemand/boostpulse"
#define SCALING_GOVERNOR_PATH "/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"
#define BOOSTPULSE_ONDEMAND "/sys/devices/system/cpu/cpufreq/ondemand/boostpulse"
#define BOOSTPULSE_INTERACTIVE "/sys/devices/system/cpu/cpufreq/interactive/boostpulse"
struct s5pc110_power_module {
struct power_module base;
@ -36,21 +37,75 @@ struct s5pc110_power_module {
int boostpulse_warned;
};
static int sysfs_read(char *path, char *s, int num_bytes)
{
char buf[80];
int count;
int ret = 0;
int fd = open(path, O_RDONLY);
if (fd < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", path, buf);
return -1;
}
if ((count = read(fd, s, num_bytes - 1)) < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", path, buf);
ret = -1;
} else {
s[count] = '\0';
}
close(fd);
return ret;
}
static int get_scaling_governor(char governor[], int size) {
if (sysfs_read(SCALING_GOVERNOR_PATH, governor,
size) == -1) {
// Can't obtain the scaling governor. Return.
return -1;
} else {
// Strip newline at the end.
int len = strlen(governor);
len--;
while (len >= 0 && (governor[len] == '\n' || governor[len] == '\r'))
governor[len--] = '\0';
}
return 0;
}
static int boostpulse_open(struct s5pc110_power_module *s5pc110)
{
char buf[80];
char governor[80];
pthread_mutex_lock(&s5pc110->lock);
if (s5pc110->boostpulse_fd < 0) {
s5pc110->boostpulse_fd = open(BOOSTPULSE_PATH, O_WRONLY);
if (get_scaling_governor(governor, sizeof(governor)) < 0) {
ALOGE("Can't read scaling governor.");
s5pc110->boostpulse_warned = 1;
} else {
if (strncmp(governor, "ondemand", 8) == 0)
s5pc110->boostpulse_fd = open(BOOSTPULSE_ONDEMAND, O_WRONLY);
else if (strncmp(governor, "interactive", 11) == 0)
s5pc110->boostpulse_fd = open(BOOSTPULSE_INTERACTIVE, O_WRONLY);
if (s5pc110->boostpulse_fd < 0) {
if (!s5pc110->boostpulse_warned) {
if (s5pc110->boostpulse_fd < 0 && !s5pc110->boostpulse_warned) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", BOOSTPULSE_PATH, buf);
ALOGE("Error opening %s boostpulse interface: %s\n", governor, buf);
s5pc110->boostpulse_warned = 1;
}
} else if (s5pc110->boostpulse_fd > 0)
ALOGD("Opened %s boostpulse interface", governor);
}
}
@ -78,7 +133,13 @@ static void s5pc110_power_hint(struct power_module *module, power_hint_t hint,
if (len < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", BOOSTPULSE_PATH, buf);
ALOGE("Error writing to boostpulse: %s\n", buf);
pthread_mutex_lock(&s5pc110->lock);
close(s5pc110->boostpulse_fd);
s5pc110->boostpulse_fd = -1;
s5pc110->boostpulse_warned = 0;
pthread_mutex_unlock(&s5pc110->lock);
}
}
break;