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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-s3c/cpuidle-s3c64xx.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-s3c/cpuidle-s3c64xx.c')
-rw-r--r-- | arch/arm/mach-s3c/cpuidle-s3c64xx.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/cpuidle-s3c64xx.c b/arch/arm/mach-s3c/cpuidle-s3c64xx.c new file mode 100644 index 0000000000..27a13cc278 --- /dev/null +++ b/arch/arm/mach-s3c/cpuidle-s3c64xx.c @@ -0,0 +1,59 @@ +// 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); |