From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001 From: Yuval Adam <_@yuv.al> Date: Wed, 30 Aug 2017 08:25:59 +0000 Subject: Initial file dump from open source release --- arch/arm/mach-s3c64xx/cpuidle.c | 63 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 arch/arm/mach-s3c64xx/cpuidle.c (limited to 'arch/arm/mach-s3c64xx/cpuidle.c') diff --git a/arch/arm/mach-s3c64xx/cpuidle.c b/arch/arm/mach-s3c64xx/cpuidle.c new file mode 100644 index 00000000..3c8ab07c --- /dev/null +++ b/arch/arm/mach-s3c64xx/cpuidle.c @@ -0,0 +1,63 @@ +/* linux/arch/arm/mach-s3c64xx/cpuidle.c + * + * Copyright (c) 2011 Wolfson Microelectronics, plc + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include +#include +#include +#include +#include +#include + +#include + +#include + +#include "regs-sys.h" +#include "regs-syscon-power.h" + +static 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, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "IDLE", + .desc = "System active, ARM gated", + }, + }, + .state_count = 1, +}; + +static int __init s3c64xx_init_cpuidle(void) +{ + return cpuidle_register(&s3c64xx_cpuidle_driver, NULL); +} +device_initcall(s3c64xx_init_cpuidle); -- cgit v1.3.1