Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c64xx/cpuidle.c b/arch/arm/mach-s3c64xx/cpuidle.c
new file mode 100644
index 000000000..0bac6f641
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/cpuidle.c
@@ -0,0 +1,60 @@
+// 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 <plat/cpu.h>
+#include <mach/map.h>
+
+#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,
+			.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);