1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2011 Wolfson Microelectronics, plc
4 // Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 // http://www.samsung.com
7 #include <linux/kernel.h>
8 #include <linux/init.h>
9 #include <linux/cpuidle.h>
11 #include <linux/export.h>
12 #include <linux/time.h>
14 #include <asm/cpuidle.h>
19 #include "regs-sys-s3c64xx.h"
20 #include "regs-syscon-power-s3c64xx.h"
22 static __cpuidle int s3c64xx_enter_idle(struct cpuidle_device *dev,
23 struct cpuidle_driver *drv, int index)
27 /* Setup PWRCFG to enter idle mode */
28 tmp = __raw_readl(S3C64XX_PWR_CFG);
29 tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
30 tmp |= S3C64XX_PWRCFG_CFG_WFI_IDLE;
31 __raw_writel(tmp, S3C64XX_PWR_CFG);
38 static struct cpuidle_driver s3c64xx_cpuidle_driver = {
39 .name = "s3c64xx_cpuidle",
43 .enter = s3c64xx_enter_idle,
45 .target_residency = 1,
47 .desc = "System active, ARM gated",
53 static int __init s3c64xx_init_cpuidle(void)
56 return cpuidle_register(&s3c64xx_cpuidle_driver, NULL);
59 device_initcall(s3c64xx_init_cpuidle);