From e480d89ce536a3ad6748ab0aea1c78824ae02c85 Mon Sep 17 00:00:00 2001
From: "Christopher N. Hesse" <raymanfx@gmail.com>
Date: Wed, 22 Jun 2016 23:04:39 +0200
Subject: [PATCH] power: Add double tap to wake support

Change-Id: Icb0b6d442544b39576ec74e70e97751d6bc70590
---
 power/Android.mk |  4 ++++
 power/power.c    | 19 ++++++++++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/power/Android.mk b/power/Android.mk
index 2aaaac87..cf968fc2 100644
--- a/power/Android.mk
+++ b/power/Android.mk
@@ -24,6 +24,10 @@ LOCAL_SHARED_LIBRARIES := liblog libcutils
 LOCAL_SRC_FILES := power.c
 LOCAL_MODULE_TAGS := optional
 
+ifneq ($(TARGET_TAP_TO_WAKE_NODE),)
+    LOCAL_CFLAGS := -DDT2W_PATH=\"$(TARGET_DT2W_PATH)\"
+endif
+
 include $(BUILD_SHARED_LIBRARY)
 
 endif
diff --git a/power/power.c b/power/power.c
index 3cf9cc21..f28dce51 100644
--- a/power/power.c
+++ b/power/power.c
@@ -503,6 +503,22 @@ static int samsung_get_feature(struct power_module *module __unused,
     return -1;
 }
 
+static void samsung_set_feature(struct power_module *module, feature_t feature, int state)
+{
+    struct samsung_power_module *samsung_pwr = (struct samsung_power_module *) module;
+
+    switch (feature) {
+#ifdef DT2W_PATH
+        case POWER_FEATURE_DOUBLE_TAP_TO_WAKE:
+            ALOGV("%s: %s double tap to wake", __func__, state ? "enabling" : "disabling");
+            sysfs_write(DT2W_PATH, state > 0 ? "1" : "0");
+            break;
+#endif
+        default:
+            break;
+    }
+}
+
 static struct hw_module_methods_t power_module_methods = {
     .open = NULL,
 };
@@ -522,7 +538,8 @@ struct samsung_power_module HAL_MODULE_INFO_SYM = {
         .init = samsung_power_init,
         .setInteractive = samsung_power_set_interactive,
         .powerHint = samsung_power_hint,
-        .getFeature = samsung_get_feature
+        .getFeature = samsung_get_feature,
+        .setFeature = samsung_set_feature
     },
 
     .lock = PTHREAD_MUTEX_INITIALIZER,