power: Allow devices to override node paths

Change-Id: Ida7f41ddce2ef458cc77348c0b44ec0a7a86df72

power/Android.mk

@@ -12,16 +12,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-LOCAL_PATH := $(call my-dir)
-
 ifeq ($(TARGET_POWERHAL_VARIANT),samsung)
 
+LOCAL_PATH := $(call my-dir)
+
 include $(CLEAR_VARS)
 
+LOCAL_SRC_FILES := power.c
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+
 LOCAL_MODULE := power.$(TARGET_BOOTLOADER_BOARD_NAME)
 LOCAL_MODULE_RELATIVE_PATH := hw
-LOCAL_SHARED_LIBRARIES := liblog libcutils
-LOCAL_SRC_FILES := power.c
 LOCAL_MODULE_TAGS := optional
 
 ifneq ($(TARGET_TAP_TO_WAKE_NODE),)

power/include/samsung_power.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SAMSUNG_POWER_H
+#define SAMSUNG_POWER_H
+
+/*
+ * Board specific nodes
+ *
+ * If your kernel exposes these controls in another place, you can either
+ * symlink to the locations given here, or override this header in your
+ * device tree.
+ */
+#define BOOSTPULSE_PATH "/sys/devices/system/cpu/cpu0/cpufreq/interactive/boostpulse"
+
+#define IO_IS_BUSY_PATH "/sys/devices/system/cpu/cpu0/cpufreq/interactive/io_is_busy"
+
+#define CPU0_HISPEED_FREQ_PATH "/sys/devices/system/cpu/cpu0/cpufreq/interactive/hispeed_freq"
+#define CPU0_MAX_FREQ_PATH "/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq"
+#define CPU4_HISPEED_FREQ_PATH "/sys/devices/system/cpu/cpu4/cpufreq/interactive/hispeed_freq"
+#define CPU4_MAX_FREQ_PATH "/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq"
+
+#endif // SAMSUNG_POWER_H

power/power.c

@@ -37,14 +37,7 @@
 #include <hardware/hardware.h>
 #include <hardware/power.h>
 
-#define BOOSTPULSE_PATH "/sys/devices/system/cpu/cpu0/cpufreq/interactive/boostpulse"
-
-#define IO_IS_BUSY_PATH "/sys/devices/system/cpu/cpu0/cpufreq/interactive/io_is_busy"
-
-#define CPU0_HISPEED_FREQ_PATH "/sys/devices/system/cpu/cpu0/cpufreq/interactive/hispeed_freq"
-#define CPU0_MAX_FREQ_PATH "/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq"
-#define CPU4_HISPEED_FREQ_PATH "/sys/devices/system/cpu/cpu4/cpufreq/interactive/hispeed_freq"
-#define CPU4_MAX_FREQ_PATH "/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq"
+#include "samsung_power.h"
 
 #define PANEL_BRIGHTNESS "/sys/class/backlight/panel/brightness"