mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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245 lines
7.0 KiB
Diff
245 lines
7.0 KiB
Diff
From a12f5cc01dd4ed811e5edaca429dcbbb129e0e50 Mon Sep 17 00:00:00 2001
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From: Tad <tad@spotco.us>
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Date: Sat, 17 Oct 2015 20:52:02 -0400
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Subject: [PATCH] Implement Quick Wakeup
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---
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arch/arm/configs/cyanogenmod_bacon_defconfig | 2 +
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include/linux/quickwakeup.h | 46 ++++++++++++
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kernel/power/Kconfig | 20 ++++--
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kernel/power/Makefile | 1 +
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kernel/power/quickwakeup.c | 104 +++++++++++++++++++++++++++
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5 files changed, 167 insertions(+), 6 deletions(-)
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create mode 100644 include/linux/quickwakeup.h
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create mode 100644 kernel/power/quickwakeup.c
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diff --git a/arch/arm/configs/cyanogenmod_bacon_defconfig b/arch/arm/configs/cyanogenmod_bacon_defconfig
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index ed05004..86aed0e 100644
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--- a/arch/arm/configs/cyanogenmod_bacon_defconfig
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+++ b/arch/arm/configs/cyanogenmod_bacon_defconfig
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@@ -3629,3 +3629,5 @@ CONFIG_NLATTR=y
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# CONFIG_CORDIC is not set
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CONFIG_QMI_ENCDEC=y
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# CONFIG_QMI_ENCDEC_DEBUG is not set
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+
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+CONFIG_QUICK_WAKEUP=y
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diff --git a/include/linux/quickwakeup.h b/include/linux/quickwakeup.h
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new file mode 100644
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index 0000000..000effa
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--- /dev/null
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+++ b/include/linux/quickwakeup.h
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@@ -0,0 +1,46 @@
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+/* include/linux/quickwakeup.h
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+ *
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+ * Copyright (C) 2014 Motorola Mobility LLC.
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#ifndef _QUICKWAKEUP_H_
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+#define _QUICKWAKEUP_H_
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+
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+#ifdef __KERNEL__
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+
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+struct quickwakeup_ops {
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+ struct list_head list;
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+ char *name;
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+ int (*qw_execute)(void *data);
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+ int (*qw_check)(void *data);
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+ int execute;
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+ void *data; /* arbitrary data passed back to user */
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+};
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+
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+#ifdef CONFIG_QUICK_WAKEUP
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+
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+int quickwakeup_register(struct quickwakeup_ops *ops);
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+void quickwakeup_unregister(struct quickwakeup_ops *ops);
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+bool quickwakeup_suspend_again(void);
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+
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+#else
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+
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+static inline int quickwakeup_register(struct quickwakeup_ops *ops) { return 0; };
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+static inline void quickwakeup_unregister(struct quickwakeup_ops *ops) {};
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+static inline bool quickwakeup_suspend_again(void) { return 0; };
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+
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+#endif /* CONFIG_QUICK_WAKEUP */
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+
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+#endif /* __KERNEL__ */
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+
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+#endif /* _QUICKWAKEUP_H_ */
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diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
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index e536c8d..8006962 100644
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--- a/kernel/power/Kconfig
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+++ b/kernel/power/Kconfig
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@@ -83,20 +83,20 @@ config PM_STD_PARTITION
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default ""
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---help---
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The default resume partition is the partition that the suspend-
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- to-disk implementation will look for a suspended disk image.
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+ to-disk implementation will look for a suspended disk image.
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- The partition specified here will be different for almost every user.
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+ The partition specified here will be different for almost every user.
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It should be a valid swap partition (at least for now) that is turned
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- on before suspending.
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+ on before suspending.
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The partition specified can be overridden by specifying:
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- resume=/dev/<other device>
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+ resume=/dev/<other device>
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- which will set the resume partition to the device specified.
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+ which will set the resume partition to the device specified.
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Note there is currently not a way to specify which device to save the
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- suspended image to. It will simply pick the first available swap
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+ suspended image to. It will simply pick the first available swap
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device.
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config PM_SLEEP
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@@ -285,6 +285,14 @@ config SUSPEND_TIME
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Prints the time spent in suspend in the kernel log, and
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keeps statistics on the time spent in suspend in
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/sys/kernel/debug/suspend_time
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+
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+config QUICK_WAKEUP
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+ bool "Quick wakeup"
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+ depends on SUSPEND
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+ default n
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+ ---help---
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+ Allow kernel driver to do periodic jobs without resuming the full system
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+ This option can increase battery life on android powered smartphone.
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config DEDUCE_WAKEUP_REASONS
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bool
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diff --git a/kernel/power/Makefile b/kernel/power/Makefile
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index 74c713b..e5bebbc 100644
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--- a/kernel/power/Makefile
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+++ b/kernel/power/Makefile
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@@ -14,5 +14,6 @@ obj-$(CONFIG_PM_WAKELOCKS) += wakelock.o
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obj-$(CONFIG_SUSPEND_TIME) += suspend_time.o
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obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
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+obj-$(CONFIG_QUICK_WAKEUP) += quickwakeup.o
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obj-$(CONFIG_SUSPEND) += wakeup_reason.o
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diff --git a/kernel/power/quickwakeup.c b/kernel/power/quickwakeup.c
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new file mode 100644
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index 0000000..46f9dda
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--- /dev/null
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+++ b/kernel/power/quickwakeup.c
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@@ -0,0 +1,104 @@
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+/* kernel/power/quickwakeup.c
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+ *
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+ * Copyright (C) 2014 Motorola Mobility LLC.
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/list.h>
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+#include <linux/mutex.h>
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+#include <linux/quickwakeup.h>
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+
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+static LIST_HEAD(qw_head);
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+static DEFINE_MUTEX(list_lock);
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+
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+int quickwakeup_register(struct quickwakeup_ops *ops)
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+{
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+ mutex_lock(&list_lock);
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+ list_add(&ops->list, &qw_head);
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+ mutex_unlock(&list_lock);
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+
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+ return 0;
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+}
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+
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+void quickwakeup_unregister(struct quickwakeup_ops *ops)
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+{
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+ mutex_lock(&list_lock);
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+ list_del(&ops->list);
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+ mutex_unlock(&list_lock);
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+}
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+
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+static int quickwakeup_check(void)
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+{
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+ int check = 0;
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+ struct quickwakeup_ops *index;
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+
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+ mutex_lock(&list_lock);
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+
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+ list_for_each_entry(index, &qw_head, list) {
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+ int ret = index->qw_check(index->data);
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+ index->execute = ret;
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+ check |= ret;
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+ pr_debug("%s: %s votes for %s\n", __func__, index->name,
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+ ret ? "execute" : "dont care");
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+ }
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+
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+ mutex_unlock(&list_lock);
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+
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+ return check;
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+}
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+
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+/* return 1 => suspend again
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+ return 0 => continue wakeup
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+ */
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+static int quickwakeup_execute(void)
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+{
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+ int suspend_again = 0;
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+ int final_vote = 1;
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+ struct quickwakeup_ops *index;
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+
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+ mutex_lock(&list_lock);
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+
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+ list_for_each_entry(index, &qw_head, list) {
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+ if (index->execute) {
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+ int ret = index->qw_execute(index->data);
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+ index->execute = 0;
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+ final_vote &= ret;
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+ suspend_again = final_vote;
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+ pr_debug("%s: %s votes for %s\n", __func__, index->name,
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+ ret ? "suspend again" : "wakeup");
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+ }
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+ }
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+
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+ mutex_unlock(&list_lock);
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+
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+ pr_debug("%s: %s\n", __func__,
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+ suspend_again ? "suspend again" : "wakeup");
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+
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+ return suspend_again;
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+}
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+
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+/* return 1 => suspend again
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+ return 0 => continue wakeup
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+ */
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+bool quickwakeup_suspend_again(void)
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+{
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+ int ret = 0;
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+
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+ if (quickwakeup_check())
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+ ret = quickwakeup_execute();
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+
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+ pr_debug("%s- returning %d %s\n", __func__, ret,
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+ ret ? "suspend again" : "wakeup");
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+
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+ return ret;
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+}
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