mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 15:13:52 +00:00
26388a7c35
For all cpuidle drivers that do not use CPUIDLE_FLAG_RCU_IDLE (iow, the simple ones) make sure all the functions are marked __cpuidle. ( due to lack of noinstr validation on these platforms it is entirely possible this isn't complete ) Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20230112195542.335211484@infradead.org
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright (c) 2011 Wolfson Microelectronics, plc
|
|
// Copyright (c) 2011 Samsung Electronics Co., Ltd.
|
|
// http://www.samsung.com
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/cpuidle.h>
|
|
#include <linux/io.h>
|
|
#include <linux/export.h>
|
|
#include <linux/time.h>
|
|
|
|
#include <asm/cpuidle.h>
|
|
|
|
#include "cpu.h"
|
|
#include "map.h"
|
|
|
|
#include "regs-sys-s3c64xx.h"
|
|
#include "regs-syscon-power-s3c64xx.h"
|
|
|
|
static __cpuidle int s3c64xx_enter_idle(struct cpuidle_device *dev,
|
|
struct cpuidle_driver *drv, int index)
|
|
{
|
|
unsigned long tmp;
|
|
|
|
/* Setup PWRCFG to enter idle mode */
|
|
tmp = __raw_readl(S3C64XX_PWR_CFG);
|
|
tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
|
|
tmp |= S3C64XX_PWRCFG_CFG_WFI_IDLE;
|
|
__raw_writel(tmp, S3C64XX_PWR_CFG);
|
|
|
|
cpu_do_idle();
|
|
|
|
return index;
|
|
}
|
|
|
|
static struct cpuidle_driver s3c64xx_cpuidle_driver = {
|
|
.name = "s3c64xx_cpuidle",
|
|
.owner = THIS_MODULE,
|
|
.states = {
|
|
{
|
|
.enter = s3c64xx_enter_idle,
|
|
.exit_latency = 1,
|
|
.target_residency = 1,
|
|
.name = "IDLE",
|
|
.desc = "System active, ARM gated",
|
|
},
|
|
},
|
|
.state_count = 1,
|
|
};
|
|
|
|
static int __init s3c64xx_init_cpuidle(void)
|
|
{
|
|
if (soc_is_s3c64xx())
|
|
return cpuidle_register(&s3c64xx_cpuidle_driver, NULL);
|
|
return 0;
|
|
}
|
|
device_initcall(s3c64xx_init_cpuidle);
|