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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/mips/loongson/common/pm.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/mips/loongson/common/pm.c')
-rw-r--r--kernel/arch/mips/loongson/common/pm.c161
1 files changed, 0 insertions, 161 deletions
diff --git a/kernel/arch/mips/loongson/common/pm.c b/kernel/arch/mips/loongson/common/pm.c
deleted file mode 100644
index a6b67ccfc..000000000
--- a/kernel/arch/mips/loongson/common/pm.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * loongson-specific suspend support
- *
- * Copyright (C) 2009 Lemote Inc.
- * Author: Wu Zhangjin <wuzhangjin@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-#include <linux/suspend.h>
-#include <linux/interrupt.h>
-#include <linux/pm.h>
-
-#include <asm/i8259.h>
-#include <asm/mipsregs.h>
-
-#include <loongson.h>
-
-static unsigned int __maybe_unused cached_master_mask; /* i8259A */
-static unsigned int __maybe_unused cached_slave_mask;
-static unsigned int __maybe_unused cached_bonito_irq_mask; /* bonito */
-
-void arch_suspend_disable_irqs(void)
-{
- /* disable all mips events */
- local_irq_disable();
-
-#ifdef CONFIG_I8259
- /* disable all events of i8259A */
- cached_slave_mask = inb(PIC_SLAVE_IMR);
- cached_master_mask = inb(PIC_MASTER_IMR);
-
- outb(0xff, PIC_SLAVE_IMR);
- inb(PIC_SLAVE_IMR);
- outb(0xff, PIC_MASTER_IMR);
- inb(PIC_MASTER_IMR);
-#endif
- /* disable all events of bonito */
- cached_bonito_irq_mask = LOONGSON_INTEN;
- LOONGSON_INTENCLR = 0xffff;
- (void)LOONGSON_INTENCLR;
-}
-
-void arch_suspend_enable_irqs(void)
-{
- /* enable all mips events */
- local_irq_enable();
-#ifdef CONFIG_I8259
- /* only enable the cached events of i8259A */
- outb(cached_slave_mask, PIC_SLAVE_IMR);
- outb(cached_master_mask, PIC_MASTER_IMR);
-#endif
- /* enable all cached events of bonito */
- LOONGSON_INTENSET = cached_bonito_irq_mask;
- (void)LOONGSON_INTENSET;
-}
-
-/*
- * Setup the board-specific events for waking up loongson from wait mode
- */
-void __weak setup_wakeup_events(void)
-{
-}
-
-/*
- * Check wakeup events
- */
-int __weak wakeup_loongson(void)
-{
- return 1;
-}
-
-/*
- * If the events are really what we want to wakeup the CPU, wake it up
- * otherwise put the CPU asleep again.
- */
-static void wait_for_wakeup_events(void)
-{
- while (!wakeup_loongson())
- LOONGSON_CHIPCFG(0) &= ~0x7;
-}
-
-/*
- * Stop all perf counters
- *
- * $24 is the control register of Loongson perf counter
- */
-static inline void stop_perf_counters(void)
-{
- __write_64bit_c0_register($24, 0, 0);
-}
-
-
-static void loongson_suspend_enter(void)
-{
- static unsigned int cached_cpu_freq;
-
- /* setup wakeup events via enabling the IRQs */
- setup_wakeup_events();
-
- stop_perf_counters();
-
- cached_cpu_freq = LOONGSON_CHIPCFG(0);
-
- /* Put CPU into wait mode */
- LOONGSON_CHIPCFG(0) &= ~0x7;
-
- /* wait for the given events to wakeup cpu from wait mode */
- wait_for_wakeup_events();
-
- LOONGSON_CHIPCFG(0) = cached_cpu_freq;
- mmiowb();
-}
-
-void __weak mach_suspend(void)
-{
-}
-
-void __weak mach_resume(void)
-{
-}
-
-static int loongson_pm_enter(suspend_state_t state)
-{
- mach_suspend();
-
- /* processor specific suspend */
- loongson_suspend_enter();
-
- mach_resume();
-
- return 0;
-}
-
-static int loongson_pm_valid_state(suspend_state_t state)
-{
- switch (state) {
- case PM_SUSPEND_ON:
- case PM_SUSPEND_STANDBY:
- case PM_SUSPEND_MEM:
- return 1;
-
- default:
- return 0;
- }
-}
-
-static const struct platform_suspend_ops loongson_pm_ops = {
- .valid = loongson_pm_valid_state,
- .enter = loongson_pm_enter,
-};
-
-static int __init loongson_pm_init(void)
-{
- suspend_set_ops(&loongson_pm_ops);
-
- return 0;
-}
-arch_initcall(loongson_pm_init);