/*
- * OMAP4 CPU idle Routines
+ * OMAP4+ CPU idle Routines
*
- * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011-2013 Texas Instruments, Inc.
* Santosh Shilimkar <santosh.shilimkar@ti.com>
* Rajendra Nayak <rnayak@ti.com>
*
#include <linux/cpuidle.h>
#include <linux/cpu_pm.h>
#include <linux/export.h>
-#include <linux/clockchips.h>
+#include <asm/cpuidle.h>
#include <asm/proc-fns.h>
#include "common.h"
#include "clockdomain.h"
/* Machine specific information */
-struct omap4_idle_statedata {
+struct idle_statedata {
u32 cpu_state;
u32 mpu_logic_state;
u32 mpu_state;
};
-static struct omap4_idle_statedata omap4_idle_data[] = {
+static struct idle_statedata omap4_idle_data[] = {
{
.cpu_state = PWRDM_POWER_ON,
.mpu_state = PWRDM_POWER_ON,
static atomic_t abort_barrier;
static bool cpu_done[NR_CPUS];
+static struct idle_statedata *state_ptr = &omap4_idle_data[0];
/* Private functions */
/**
- * omap4_enter_idle_coupled_[simple/coupled] - OMAP4 cpuidle entry functions
+ * omap_enter_idle_[simple/coupled] - OMAP4PLUS cpuidle entry functions
* @dev: cpuidle device
* @drv: cpuidle driver
* @index: the index of state to be entered
* specified low power state selected by the governor.
* Returns the amount of time spent in the low power state.
*/
-static int omap4_enter_idle_simple(struct cpuidle_device *dev,
+static int omap_enter_idle_simple(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
return index;
}
-static int omap4_enter_idle_coupled(struct cpuidle_device *dev,
+static int omap_enter_idle_coupled(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
- struct omap4_idle_statedata *cx = &omap4_idle_data[index];
- int cpu_id = smp_processor_id();
+ struct idle_statedata *cx = state_ptr + index;
/*
* CPU0 has to wait and stay ON until CPU1 is OFF state.
}
}
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu_id);
-
/*
* Call idle CPU PM enter notifier chain so that
* VFP and per CPU interrupt context is saved.
* Call idle CPU cluster PM exit notifier chain
* to restore GIC and wakeupgen context.
*/
- if (omap4_mpuss_read_prev_context_state())
+ if ((cx->mpu_state == PWRDM_POWER_RET) &&
+ (cx->mpu_logic_state == PWRDM_POWER_OFF))
cpu_cluster_pm_exit();
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu_id);
-
fail:
cpuidle_coupled_parallel_barrier(dev, &abort_barrier);
cpu_done[dev->cpu] = false;
return index;
}
-/*
- * For each cpu, setup the broadcast timer because local timers
- * stops for the states above C1.
- */
-static void omap_setup_broadcast_timer(void *arg)
-{
- int cpu = smp_processor_id();
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ON, &cpu);
-}
-
-static DEFINE_PER_CPU(struct cpuidle_device, omap4_idle_dev);
-
static struct cpuidle_driver omap4_idle_driver = {
.name = "omap4_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
{
/* C1 - CPU0 ON + CPU1 ON + MPU ON */
.exit_latency = 2 + 2,
.target_residency = 5,
.flags = CPUIDLE_FLAG_TIME_VALID,
- .enter = omap4_enter_idle_simple,
+ .enter = omap_enter_idle_simple,
.name = "C1",
- .desc = "MPUSS ON"
+ .desc = "CPUx ON, MPUSS ON"
},
{
/* C2 - CPU0 OFF + CPU1 OFF + MPU CSWR */
.exit_latency = 328 + 440,
.target_residency = 960,
- .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_COUPLED,
- .enter = omap4_enter_idle_coupled,
+ .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_COUPLED |
+ CPUIDLE_FLAG_TIMER_STOP,
+ .enter = omap_enter_idle_coupled,
.name = "C2",
- .desc = "MPUSS CSWR",
+ .desc = "CPUx OFF, MPUSS CSWR",
},
{
/* C3 - CPU0 OFF + CPU1 OFF + MPU OSWR */
.exit_latency = 460 + 518,
.target_residency = 1100,
- .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_COUPLED,
- .enter = omap4_enter_idle_coupled,
+ .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_COUPLED |
+ CPUIDLE_FLAG_TIMER_STOP,
+ .enter = omap_enter_idle_coupled,
.name = "C3",
- .desc = "MPUSS OSWR",
+ .desc = "CPUx OFF, MPUSS OSWR",
},
},
.state_count = ARRAY_SIZE(omap4_idle_data),
/* Public functions */
/**
- * omap4_idle_init - Init routine for OMAP4 idle
+ * omap4_idle_init - Init routine for OMAP4+ idle
*
- * Registers the OMAP4 specific cpuidle driver to the cpuidle
+ * Registers the OMAP4+ specific cpuidle driver to the cpuidle
* framework with the valid set of states.
*/
int __init omap4_idle_init(void)
{
- struct cpuidle_device *dev;
- unsigned int cpu_id = 0;
-
mpu_pd = pwrdm_lookup("mpu_pwrdm");
cpu_pd[0] = pwrdm_lookup("cpu0_pwrdm");
cpu_pd[1] = pwrdm_lookup("cpu1_pwrdm");
if (!cpu_clkdm[0] || !cpu_clkdm[1])
return -ENODEV;
- /* Configure the broadcast timer on each cpu */
- on_each_cpu(omap_setup_broadcast_timer, NULL, 1);
-
- for_each_cpu(cpu_id, cpu_online_mask) {
- dev = &per_cpu(omap4_idle_dev, cpu_id);
- dev->cpu = cpu_id;
-#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
- dev->coupled_cpus = *cpu_online_mask;
-#endif
- cpuidle_register_driver(&omap4_idle_driver);
-
- if (cpuidle_register_device(dev)) {
- pr_err("%s: CPUidle register failed\n", __func__);
- return -EIO;
- }
- }
-
- return 0;
+ return cpuidle_register(&omap4_idle_driver, cpu_online_mask);
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff