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-rw-r--r--arch/arm/mach-omap2/cpuidle34xx.c298
1 files changed, 120 insertions, 178 deletions
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 5358664..207bc1c 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -38,40 +38,44 @@
#ifdef CONFIG_CPU_IDLE
-/*
- * The latencies/thresholds for various C states have
- * to be configured from the respective board files.
- * These are some default values (which might not provide
- * the best power savings) used on boards which do not
- * pass these details from the board file.
- */
-static struct cpuidle_params cpuidle_params_table[] = {
- /* C1 */
- {2 + 2, 5, 1},
- /* C2 */
- {10 + 10, 30, 1},
- /* C3 */
- {50 + 50, 300, 1},
- /* C4 */
- {1500 + 1800, 4000, 1},
- /* C5 */
- {2500 + 7500, 12000, 1},
- /* C6 */
- {3000 + 8500, 15000, 1},
- /* C7 */
- {10000 + 30000, 300000, 1},
-};
-#define OMAP3_NUM_STATES ARRAY_SIZE(cpuidle_params_table)
-
/* Mach specific information to be recorded in the C-state driver_data */
struct omap3_idle_statedata {
u32 mpu_state;
u32 core_state;
- u8 valid;
};
-struct omap3_idle_statedata omap3_idle_data[OMAP3_NUM_STATES];
-struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
+static struct omap3_idle_statedata omap3_idle_data[] = {
+ {
+ .mpu_state = PWRDM_POWER_ON,
+ .core_state = PWRDM_POWER_ON,
+ },
+ {
+ .mpu_state = PWRDM_POWER_ON,
+ .core_state = PWRDM_POWER_ON,
+ },
+ {
+ .mpu_state = PWRDM_POWER_RET,
+ .core_state = PWRDM_POWER_ON,
+ },
+ {
+ .mpu_state = PWRDM_POWER_OFF,
+ .core_state = PWRDM_POWER_ON,
+ },
+ {
+ .mpu_state = PWRDM_POWER_RET,
+ .core_state = PWRDM_POWER_RET,
+ },
+ {
+ .mpu_state = PWRDM_POWER_OFF,
+ .core_state = PWRDM_POWER_RET,
+ },
+ {
+ .mpu_state = PWRDM_POWER_OFF,
+ .core_state = PWRDM_POWER_OFF,
+ },
+};
+
+static struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
static int _cpuidle_allow_idle(struct powerdomain *pwrdm,
struct clockdomain *clkdm)
@@ -91,8 +95,7 @@ static int __omap3_enter_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
- struct omap3_idle_statedata *cx =
- cpuidle_get_statedata(&dev->states_usage[index]);
+ struct omap3_idle_statedata *cx = &omap3_idle_data[index];
u32 mpu_state = cx->mpu_state, core_state = cx->core_state;
local_fiq_disable();
@@ -169,14 +172,12 @@ static inline int omap3_enter_idle(struct cpuidle_device *dev,
* if it satisfies the enable_off_mode condition.
*/
static int next_valid_state(struct cpuidle_device *dev,
- struct cpuidle_driver *drv,
- int index)
+ struct cpuidle_driver *drv, int index)
{
- struct cpuidle_state_usage *curr_usage = &dev->states_usage[index];
- struct cpuidle_state *curr = &drv->states[index];
- struct omap3_idle_statedata *cx = cpuidle_get_statedata(curr_usage);
+ struct omap3_idle_statedata *cx = &omap3_idle_data[index];
u32 mpu_deepest_state = PWRDM_POWER_RET;
u32 core_deepest_state = PWRDM_POWER_RET;
+ int idx;
int next_index = -1;
if (enable_off_mode) {
@@ -191,45 +192,29 @@ static int next_valid_state(struct cpuidle_device *dev,
}
/* Check if current state is valid */
- if ((cx->valid) &&
- (cx->mpu_state >= mpu_deepest_state) &&
- (cx->core_state >= core_deepest_state)) {
+ if ((cx->mpu_state >= mpu_deepest_state) &&
+ (cx->core_state >= core_deepest_state))
return index;
- } else {
- int idx = OMAP3_NUM_STATES - 1;
-
- /* Reach the current state starting at highest C-state */
- for (; idx >= 0; idx--) {
- if (&drv->states[idx] == curr) {
- next_index = idx;
- break;
- }
- }
-
- /* Should never hit this condition */
- WARN_ON(next_index == -1);
- /*
- * Drop to next valid state.
- * Start search from the next (lower) state.
- */
- idx--;
- for (; idx >= 0; idx--) {
- cx = cpuidle_get_statedata(&dev->states_usage[idx]);
- if ((cx->valid) &&
- (cx->mpu_state >= mpu_deepest_state) &&
- (cx->core_state >= core_deepest_state)) {
- next_index = idx;
- break;
- }
+ /*
+ * Drop to next valid state.
+ * Start search from the next (lower) state.
+ */
+ for (idx = index - 1; idx >= 0; idx--) {
+ cx = &omap3_idle_data[idx];
+ if ((cx->mpu_state >= mpu_deepest_state) &&
+ (cx->core_state >= core_deepest_state)) {
+ next_index = idx;
+ break;
}
- /*
- * C1 is always valid.
- * So, no need to check for 'next_index == -1' outside
- * this loop.
- */
}
+ /*
+ * C1 is always valid.
+ * So, no need to check for 'next_index == -1' outside
+ * this loop.
+ */
+
return next_index;
}
@@ -273,7 +258,7 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
* Prevent PER off if CORE is not in retention or off as this
* would disable PER wakeups completely.
*/
- cx = cpuidle_get_statedata(&dev->states_usage[index]);
+ cx = &omap3_idle_data[index];
core_next_state = cx->core_state;
per_next_state = per_saved_state = pwrdm_read_next_pwrst(per_pd);
if ((per_next_state == PWRDM_POWER_OFF) &&
@@ -298,57 +283,71 @@ select_state:
DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
-void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
-{
- int i;
-
- if (!cpuidle_board_params)
- return;
-
- for (i = 0; i < OMAP3_NUM_STATES; i++) {
- cpuidle_params_table[i].valid = cpuidle_board_params[i].valid;
- cpuidle_params_table[i].exit_latency =
- cpuidle_board_params[i].exit_latency;
- cpuidle_params_table[i].target_residency =
- cpuidle_board_params[i].target_residency;
- }
- return;
-}
-
struct cpuidle_driver omap3_idle_driver = {
.name = "omap3_idle",
.owner = THIS_MODULE,
+ .states = {
+ {
+ .enter = omap3_enter_idle,
+ .exit_latency = 2 + 2,
+ .target_residency = 5,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C1",
+ .desc = "MPU ON + CORE ON",
+ },
+ {
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 10 + 10,
+ .target_residency = 30,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C2",
+ .desc = "MPU ON + CORE ON",
+ },
+ {
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 50 + 50,
+ .target_residency = 300,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C3",
+ .desc = "MPU RET + CORE ON",
+ },
+ {
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 1500 + 1800,
+ .target_residency = 4000,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C4",
+ .desc = "MPU OFF + CORE ON",
+ },
+ {
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 2500 + 7500,
+ .target_residency = 12000,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C5",
+ .desc = "MPU RET + CORE RET",
+ },
+ {
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 3000 + 8500,
+ .target_residency = 15000,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C6",
+ .desc = "MPU OFF + CORE RET",
+ },
+ {
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 10000 + 30000,
+ .target_residency = 30000,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "C7",
+ .desc = "MPU OFF + CORE OFF",
+ },
+ },
+ .state_count = ARRAY_SIZE(omap3_idle_data),
+ .safe_state_index = 0,
};
-/* Helper to fill the C-state common data*/
-static inline void _fill_cstate(struct cpuidle_driver *drv,
- int idx, const char *descr)
-{
- struct cpuidle_state *state = &drv->states[idx];
-
- state->exit_latency = cpuidle_params_table[idx].exit_latency;
- state->target_residency = cpuidle_params_table[idx].target_residency;
- state->flags = CPUIDLE_FLAG_TIME_VALID;
- state->enter = omap3_enter_idle_bm;
- sprintf(state->name, "C%d", idx + 1);
- strncpy(state->desc, descr, CPUIDLE_DESC_LEN);
-
-}
-
-/* Helper to register the driver_data */
-static inline struct omap3_idle_statedata *_fill_cstate_usage(
- struct cpuidle_device *dev,
- int idx)
-{
- struct omap3_idle_statedata *cx = &omap3_idle_data[idx];
- struct cpuidle_state_usage *state_usage = &dev->states_usage[idx];
-
- cx->valid = cpuidle_params_table[idx].valid;
- cpuidle_set_statedata(state_usage, cx);
-
- return cx;
-}
-
/**
* omap3_idle_init - Init routine for OMAP3 idle
*
@@ -358,77 +357,20 @@ static inline struct omap3_idle_statedata *_fill_cstate_usage(
int __init omap3_idle_init(void)
{
struct cpuidle_device *dev;
- struct cpuidle_driver *drv = &omap3_idle_driver;
- struct omap3_idle_statedata *cx;
mpu_pd = pwrdm_lookup("mpu_pwrdm");
core_pd = pwrdm_lookup("core_pwrdm");
per_pd = pwrdm_lookup("per_pwrdm");
cam_pd = pwrdm_lookup("cam_pwrdm");
+ if (!mpu_pd || !core_pd || !per_pd || !cam_pd)
+ return -ENODEV;
- drv->safe_state_index = -1;
- dev = &per_cpu(omap3_idle_dev, smp_processor_id());
-
- /* C1 . MPU WFI + Core active */
- _fill_cstate(drv, 0, "MPU ON + CORE ON");
- (&drv->states[0])->enter = omap3_enter_idle;
- drv->safe_state_index = 0;
- cx = _fill_cstate_usage(dev, 0);
- cx->valid = 1; /* C1 is always valid */
- cx->mpu_state = PWRDM_POWER_ON;
- cx->core_state = PWRDM_POWER_ON;
-
- /* C2 . MPU WFI + Core inactive */
- _fill_cstate(drv, 1, "MPU ON + CORE ON");
- cx = _fill_cstate_usage(dev, 1);
- cx->mpu_state = PWRDM_POWER_ON;
- cx->core_state = PWRDM_POWER_ON;
-
- /* C3 . MPU CSWR + Core inactive */
- _fill_cstate(drv, 2, "MPU RET + CORE ON");
- cx = _fill_cstate_usage(dev, 2);
- cx->mpu_state = PWRDM_POWER_RET;
- cx->core_state = PWRDM_POWER_ON;
-
- /* C4 . MPU OFF + Core inactive */
- _fill_cstate(drv, 3, "MPU OFF + CORE ON");
- cx = _fill_cstate_usage(dev, 3);
- cx->mpu_state = PWRDM_POWER_OFF;
- cx->core_state = PWRDM_POWER_ON;
-
- /* C5 . MPU RET + Core RET */
- _fill_cstate(drv, 4, "MPU RET + CORE RET");
- cx = _fill_cstate_usage(dev, 4);
- cx->mpu_state = PWRDM_POWER_RET;
- cx->core_state = PWRDM_POWER_RET;
-
- /* C6 . MPU OFF + Core RET */
- _fill_cstate(drv, 5, "MPU OFF + CORE RET");
- cx = _fill_cstate_usage(dev, 5);
- cx->mpu_state = PWRDM_POWER_OFF;
- cx->core_state = PWRDM_POWER_RET;
-
- /* C7 . MPU OFF + Core OFF */
- _fill_cstate(drv, 6, "MPU OFF + CORE OFF");
- cx = _fill_cstate_usage(dev, 6);
- /*
- * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot
- * enable OFF mode in a stable form for previous revisions.
- * We disable C7 state as a result.
- */
- if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) {
- cx->valid = 0;
- pr_warn("%s: core off state C7 disabled due to i583\n",
- __func__);
- }
- cx->mpu_state = PWRDM_POWER_OFF;
- cx->core_state = PWRDM_POWER_OFF;
-
- drv->state_count = OMAP3_NUM_STATES;
cpuidle_register_driver(&omap3_idle_driver);
- dev->state_count = OMAP3_NUM_STATES;
+ dev = &per_cpu(omap3_idle_dev, smp_processor_id());
+ dev->cpu = 0;
+
if (cpuidle_register_device(dev)) {
printk(KERN_ERR "%s: CPUidle register device failed\n",
__func__);