mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
e79a23c5b9
This patch adds IKS (In Kernel Switcher) support to cpufreq driver. This creates a combined freq table for A7-A15 CPU pairs. A7 frequencies are virtualized and scaled down to half the actual frequencies to approximate a linear scale across the combined A7+A15 range. When the requested frequency change crosses the A7-A15 boundary a cluster switch is invoked. Based on earlier work from Sudeep KarkadaNagesha. Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/*
|
|
* ARM big.LITTLE platform's CPUFreq header file
|
|
*
|
|
* Copyright (C) 2013 ARM Ltd.
|
|
* Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
|
|
*
|
|
* Copyright (C) 2013 Linaro.
|
|
* Viresh Kumar <viresh.kumar@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
#ifndef CPUFREQ_ARM_BIG_LITTLE_H
|
|
#define CPUFREQ_ARM_BIG_LITTLE_H
|
|
|
|
#include <linux/cpufreq.h>
|
|
#include <linux/device.h>
|
|
#include <linux/types.h>
|
|
|
|
struct cpufreq_arm_bL_ops {
|
|
char name[CPUFREQ_NAME_LEN];
|
|
int (*get_transition_latency)(struct device *cpu_dev);
|
|
|
|
/*
|
|
* This must set opp table for cpu_dev in a similar way as done by
|
|
* of_init_opp_table().
|
|
*/
|
|
int (*init_opp_table)(struct device *cpu_dev);
|
|
};
|
|
|
|
int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops);
|
|
void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops);
|
|
|
|
#endif /* CPUFREQ_ARM_BIG_LITTLE_H */
|