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60 lines
1.3 KiB
60 lines
1.3 KiB
// 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 int s3c64xx_enter_idle(struct cpuidle_device *dev, |
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struct cpuidle_driver *drv, |
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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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