From 7d8a76fece405c2663b1340672392af7228d7c2c Mon Sep 17 00:00:00 2001
From: prototype74 <46874884+prototype74@users.noreply.github.com>
Date: Wed, 15 Apr 2020 00:49:13 +0200
Subject: [PATCH] sm5502: auto enable/disable 8226_smbbp_otg regulator

Automatically enable/disable 8226_smbbp_otg regulator for kmini3g, s3ve3g to supply connected OTG devices from device's power instead of external power source.

Based on https://github.com/Pavlex4/S3-Neo-Kernel/commit/4f03ed4b33abcf3c0b8277ab9718adefbe4fb874

Change-Id: Ibd2b3fb6417faf630ed13985c26ee45400e88674
---
 drivers/misc/sm5502.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/misc/sm5502.c b/drivers/misc/sm5502.c
index 3f2533b2e0b..2816a7ff4d2 100644
--- a/drivers/misc/sm5502.c
+++ b/drivers/misc/sm5502.c
@@ -1029,6 +1029,11 @@ static int sm5502_attach_dev(struct sm5502_usbsw *usbsw)
 	int val1, val2, val3, val4, vbus;
 	struct sm5502_platform_data *pdata = usbsw->pdata;
 	struct i2c_client *client = usbsw->client;
+#if defined(CONFIG_USB_HOST_NOTIFY)
+#if defined(CONFIG_SEC_ATLANTIC_PROJECT) || defined(CONFIG_MACH_S3VE3G_EUR)
+	struct regulator *otg_regulator = regulator_get(NULL, "8226_smbbp_otg");
+#endif
+#endif
 #if defined(CONFIG_VIDEO_MHL_V2)
 	/*u8 mhl_ret = 0;*/
 #endif
@@ -1157,6 +1162,11 @@ static int sm5502_attach_dev(struct sm5502_usbsw *usbsw)
 #endif
 		sm5502_set_otg(usbsw, SM5502_ATTACHED);
 		pdata->callback(CABLE_TYPE_OTG, SM5502_ATTACHED);
+#if defined(CONFIG_SEC_ATLANTIC_PROJECT) || defined(CONFIG_MACH_S3VE3G_EUR)
+		if (!regulator_is_enabled(otg_regulator)) {
+			regulator_enable(otg_regulator);
+		}
+#endif
 #endif
 	/* JIG */
 	} else if (val2 & DEV_T2_USB_MASK) {
@@ -1270,6 +1280,11 @@ static int sm5502_attach_dev(struct sm5502_usbsw *usbsw)
 static int sm5502_detach_dev(struct sm5502_usbsw *usbsw)
 {
 	struct sm5502_platform_data *pdata = usbsw->pdata;
+#if defined(CONFIG_USB_HOST_NOTIFY)
+#if defined(CONFIG_SEC_ATLANTIC_PROJECT) || defined(CONFIG_MACH_S3VE3G_EUR)
+	struct regulator *otg_regulator = regulator_get(NULL, "8226_smbbp_otg");
+#endif
+#endif
 #if defined(CONFIG_TOUCHSCREEN_MMS144)
 	int tsp_noti_ignore = 0;
 
@@ -1341,6 +1356,11 @@ static int sm5502_detach_dev(struct sm5502_usbsw *usbsw)
 		sm5502_set_otg(usbsw, SM5502_DETACHED);
 		pdata->callback(CABLE_TYPE_OTG, SM5502_DETACHED);
 #endif
+#if defined(CONFIG_SEC_ATLANTIC_PROJECT) || defined(CONFIG_MACH_S3VE3G_EUR)
+		if (regulator_is_enabled(otg_regulator)) {
+			regulator_disable(otg_regulator);
+		}
+#endif
 #endif
 	/* JIG */
 	} else if (usbsw->dev2 & DEV_T2_USB_MASK) {