From 59efc896ccc7c9da8333568163987298dd0828f3 Mon Sep 17 00:00:00 2001
From: "charles.park" <charles.park@hardkernel.com>
Date: Thu, 6 Apr 2017 17:31:00 +0900
Subject: [PATCH] ODROID-XU4 : s2mps11 manual reset function enable for
 hardware watchdog.

Change-Id: Ib22723438ee02b77c3e75a00f2e7dfbb84c01618
---
 drivers/regulator/s2mps11.c | 62 +++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 mode change 100644 => 100755 drivers/regulator/s2mps11.c

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
old mode 100644
new mode 100755
index 06acad24ca06..b3a900820a70
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -1142,6 +1142,64 @@ static int s2mps11_pmic_ethonoff(struct platform_device *pdev, bool onoff)
 	return ret;
 }
 
+/* for External Watchdog Hardware module */
+#include <linux/kernel.h>
+unsigned int external_watchdog = false;
+unsigned int debounce_time = 3;
+
+static int __init external_watchdog_enable(char *s)
+{
+	if (!strcmp(s, "true")) {
+		external_watchdog = true;
+		pr_emerg("s2mps11 : external watchdog enable!\n");
+	}
+	return	0;
+}
+__setup("external_watchdog=", external_watchdog_enable);
+
+static int __init external_watchdog_debounce(char *s)
+{
+	unsigned long value;
+
+	if (kstrtoul(s, 10, &value) != 0)
+		value = 3;
+
+	debounce_time = value;
+	return	0;
+}
+__setup("external_watchdog_debounce=", external_watchdog_debounce);
+
+/* pmic control register setup for external watch dog board */
+static int s2mps11_pmic_watchdog_setup(struct sec_pmic_dev *iodev)
+{
+	unsigned char rdata = 0;
+
+	/* PWRHOLD ctrl = 0*/
+	rdata = 0x0;
+
+	/* Manual reset enable */
+	rdata |= 0x08;
+
+	/* Manual reset 3 sec(default) */
+	if (debounce_time > 2 && debounce_time < 9)
+		rdata |= (debounce_time - 1);
+	else if (debounce_time > 8 && debounce_time < 11)
+		rdata |= (debounce_time - 9);
+	else
+		rdata |= 2;
+
+	if(regmap_update_bits(iodev->regmap_pmic, S2MPS11_REG_CTRL1,
+				0xFF, rdata))
+		pr_err("%s : S2MPS11_REG_CTRL1(w) fail!\n", __func__);
+	else {
+		pr_emerg("%s : external watchdog debounce time = %d sec\n",
+			__func__, debounce_time);
+		pr_emerg("%s : S2MPS11_REG_CTRL1(w:0x%02X) success!\n",
+			__func__, rdata);
+	}
+	return	0;
+}
+
 static int s2mps11_pmic_probe(struct platform_device *pdev)
 {
 	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -1269,6 +1327,10 @@ common_reg:
 out:
 	kfree(rdata);
 
+	/* for Exterenal Watchdog board enable */
+	if (external_watchdog)
+		s2mps11_pmic_watchdog_setup(iodev);
+
 	return ret;
 }