From 7bde3afb567b4d92bfbb7b128a0c2f950f70b3ed Mon Sep 17 00:00:00 2001
From: "hong.guo" <hong.guo@amlogic.com>
Date: Fri, 22 Sep 2017 15:31:04 +0800
Subject: [PATCH] Power: add wakeup interface in shutdown

PD#150222: shutdown: add interface for alarm wakeup

1.add interface for alarm wakeup.
2.set alarm to wakeup system in shutdown.

Change-Id: I21adaecd15b0bc28c6c363835820c9e0291b87af
Signed-off-by: hong.guo <hong.guo@amlogic.com>
---
 arch/arm64/boot/dts/amlogic/mesongxl.dtsi |  3 +-
 drivers/amlogic/pm/gx_pm.c                | 38 ++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/mesongxl.dtsi b/arch/arm64/boot/dts/amlogic/mesongxl.dtsi
index 98e7f9316aad..8d9c54951945 100644
--- a/arch/arm64/boot/dts/amlogic/mesongxl.dtsi
+++ b/arch/arm64/boot/dts/amlogic/mesongxl.dtsi
@@ -159,7 +159,8 @@
 	meson_suspend:pm{
 		compatible = "amlogic, pm";
 		device_name = "aml_pm";
-		reg = <0x0 0xc810023c 0x0 0x4>;
+		reg = <0x0 0xc81000a8 0x0 0x4
+			0x0 0xc810023c 0x0 0x4>;
 	};
 
 	secmon {
diff --git a/drivers/amlogic/pm/gx_pm.c b/drivers/amlogic/pm/gx_pm.c
index 28a5689c2979..f4589befe7fd 100644
--- a/drivers/amlogic/pm/gx_pm.c
+++ b/drivers/amlogic/pm/gx_pm.c
@@ -63,6 +63,7 @@ static u32 psci_get_version(void)
 #undef pr_fmt
 #define pr_fmt(fmt) "gxbb_pm: " fmt
 
+static void __iomem *debug_reg;
 static void __iomem *exit_reg;
 static int max_idle_lvl;
 static suspend_state_t pm_state;
@@ -178,6 +179,37 @@ ssize_t suspend_reason_store(struct device *dev, struct device_attribute *attr,
 
 DEVICE_ATTR(suspend_reason, 0664, suspend_reason_show, suspend_reason_store);
 
+ssize_t time_out_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	unsigned int val = 0, len;
+
+	val = readl(debug_reg);
+	len = sprintf(buf, "%d\n", val);
+
+	return len;
+}
+
+ssize_t time_out_store(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
+{
+	unsigned int time_out;
+	int ret;
+
+	ret = kstrtouint(buf, 10, &time_out);
+	switch (ret) {
+	case 0:
+		writel(time_out, debug_reg);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+DEVICE_ATTR(time_out, 0664, time_out_show, time_out_store);
+
 static int __init meson_pm_probe(struct platform_device *pdev)
 {
 	struct device_node *cpu_node;
@@ -209,8 +241,12 @@ static int __init meson_pm_probe(struct platform_device *pdev)
 		suspend_set_ops(&meson_gx_ops);
 	}
 
-	exit_reg = of_iomap(pdev->dev.of_node, 0);
+	debug_reg = of_iomap(pdev->dev.of_node, 0);
+	exit_reg = of_iomap(pdev->dev.of_node, 1);
+	writel(0x0, debug_reg);
 	device_create_file(&pdev->dev, &dev_attr_suspend_reason);
+	device_create_file(&pdev->dev, &dev_attr_time_out);
+	device_rename(&pdev->dev, "aml_pm");
 #ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND
 	if (lgcy_early_suspend_init())
 		return -1;