Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Albin Tonnerre |
74 |
39.36% |
1 |
11.11% |
| Daniel Lezcano |
58 |
30.85% |
3 |
33.33% |
| Robert Lee |
39 |
20.74% |
1 |
11.11% |
| Deepthi Dharwar |
14 |
7.45% |
2 |
22.22% |
| Thomas Gleixner |
2 |
1.06% |
1 |
11.11% |
| Paul Gortmaker |
1 |
0.53% |
1 |
11.11% |
| Total |
188 |
|
9 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* based on arch/arm/mach-kirkwood/cpuidle.c
*
* CPU idle support for AT91 SoC
*
* The cpu idle uses wait-for-interrupt and RAM self refresh in order
* to implement two idle states -
* #1 wait-for-interrupt
* #2 wait-for-interrupt and RAM self refresh
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/cpuidle.h>
#include <linux/io.h>
#include <linux/export.h>
#include <asm/cpuidle.h>
#define AT91_MAX_STATES 2
static void (*at91_standby)(void);
/* Actual code that puts the SoC in different idle states */
static int at91_enter_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
at91_standby();
return index;
}
static struct cpuidle_driver at91_idle_driver = {
.name = "at91_idle",
.owner = THIS_MODULE,
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
.enter = at91_enter_idle,
.exit_latency = 10,
.target_residency = 10000,
.name = "RAM_SR",
.desc = "WFI and DDR Self Refresh",
},
.state_count = AT91_MAX_STATES,
};
/* Initialize CPU idle by registering the idle states */
static int at91_cpuidle_probe(struct platform_device *dev)
{
at91_standby = (void *)(dev->dev.platform_data);
return cpuidle_register(&at91_idle_driver, NULL);
}
static struct platform_driver at91_cpuidle_driver = {
.driver = {
.name = "cpuidle-at91",
},
.probe = at91_cpuidle_probe,
};
builtin_platform_driver(at91_cpuidle_driver);