60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2011 Wolfson Microelectronics, plc
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// Copyright (c) 2011 Samsung Electronics Co., Ltd.
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// http://www.samsung.com
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/cpuidle.h>
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#include <linux/io.h>
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#include <linux/export.h>
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#include <linux/time.h>
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#include <asm/cpuidle.h>
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#include "cpu.h"
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#include "map.h"
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#include "regs-sys-s3c64xx.h"
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#include "regs-syscon-power-s3c64xx.h"
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static __cpuidle int s3c64xx_enter_idle(struct cpuidle_device *dev,
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struct cpuidle_driver *drv, int index)
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{
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unsigned long tmp;
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/* Setup PWRCFG to enter idle mode */
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tmp = __raw_readl(S3C64XX_PWR_CFG);
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tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
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tmp |= S3C64XX_PWRCFG_CFG_WFI_IDLE;
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__raw_writel(tmp, S3C64XX_PWR_CFG);
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cpu_do_idle();
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return index;
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}
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static struct cpuidle_driver s3c64xx_cpuidle_driver = {
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.name = "s3c64xx_cpuidle",
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.owner = THIS_MODULE,
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.states = {
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{
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.enter = s3c64xx_enter_idle,
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.exit_latency = 1,
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.target_residency = 1,
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.name = "IDLE",
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.desc = "System active, ARM gated",
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},
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},
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.state_count = 1,
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};
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static int __init s3c64xx_init_cpuidle(void)
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{
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if (soc_is_s3c64xx())
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return cpuidle_register(&s3c64xx_cpuidle_driver, NULL);
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return 0;
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}
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device_initcall(s3c64xx_init_cpuidle);
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