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/*
* Copyright (C) 2021 The LineageOS Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#define LOG_TAG "PowerHAL_MSM8939_Ext"
#include <log/log.h>
#define BIG_MAX_CPU_PATH "/sys/devices/system/cpu/cpu0/core_ctl/max_cpus"
static void sysfs_write(char *path, char *s)
{
char buf[80];
int len;
int fd;
if ((fd = open(path, O_WRONLY)) < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", path, buf);
return;
}
len = write(fd, s, strlen(s));
if (len < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", path, buf);
}
close(fd);
}
void power_set_interactive_ext(int on)
{
ALOGD("%sabling big CPU cluster", on ? "En" : "Dis");
sysfs_write(BIG_MAX_CPU_PATH, on ? "4" : "0");
}
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