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CPUidle cleanup

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Merge tag 'omap-cleanup-cpuidle-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup

CPUidle cleanup

By Daniel Lezcano
via Kevin Hilman (1) and Tony Lindgren (1)
* tag 'omap-cleanup-cpuidle-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP3: cpuidle - check the powerdomain lookup
  ARM: OMAP3: cpuidle - set global variables static
  ARM: OMAP3: set omap3_idle_data as static
  ARM: OMAP3: cpuidle - simplify next_valid_state
  ARM: OMAP3: cpuidle - use omap3_idle_data directly
  ARM: OMAP3: define statically the omap3_idle_data
  ARM: OMAP3: cpuidle - remove cpuidle_params_table
  ARM: OMAP3: cpuidle - remove the 'valid' field
  ARM: OMAP3: cpuidle - remove errata check in the init function
  ARM: OMAP3: define cpuidle statically
  ARM: OMAP3: cpuidle - remove rx51 cpuidle parameters table
  ARM: OMAP4: cpuidle - remove omap4_idle_data initialization at boot time
  ARM: OMAP4: cpuidle - use the omap4_idle_data variable directly
  ARM: OMAP4: cpuidle - Initialize omap4_idle_data at compile time
  ARM: OMAP4: cpuidle - fix static omap4_idle_data declaration
  ARM: OMAP4: cpuidle - Remove the cpuidle_params_table table
  ARM: OMAP4: cpuidle - Declare the states with the driver declaration
  ARM: OMAP4: cpuidle - Remove unused valid field

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2012-05-09 02:31:48 -07:00
parent d5a2a1ba83 274994c49c
commit 86558257aa
4 changed files with 190 additions and 293 deletions
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38
arch/arm/mach-omap2/board-rx51.c
View file

@ -59,25 +59,24 @@ static struct platform_device leds_gpio = {
};
/*
* cpuidle C-states definition override from the default values.
* The 'exit_latency' field is the sum of sleep and wake-up latencies.
*/
static struct cpuidle_params rx51_cpuidle_params[] = {
/* C1 */
{110 + 162, 5 , 1},
/* C2 */
{106 + 180, 309, 1},
/* C3 */
{107 + 410, 46057, 0},
/* C4 */
{121 + 3374, 46057, 0},
/* C5 */
{855 + 1146, 46057, 1},
/* C6 */
{7580 + 4134, 484329, 0},
/* C7 */
{7505 + 15274, 484329, 1},
};
* cpuidle C-states definition for rx51.
*
* The 'exit_latency' field is the sum of sleep
* and wake-up latencies.
---------------------------------------------
| state | exit_latency | target_residency |
---------------------------------------------
| C1 | 110 + 162 | 5 |
| C2 | 106 + 180 | 309 |
| C3 | 107 + 410 | 46057 |
| C4 | 121 + 3374 | 46057 |
| C5 | 855 + 1146 | 46057 |
| C6 | 7580 + 4134 | 484329 |
| C7 | 7505 + 15274 | 484329 |
---------------------------------------------
*/
extern void __init rx51_peripherals_init(void);
@ -98,7 +97,6 @@ static void __init rx51_init(void)
struct omap_sdrc_params *sdrc_params;
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
omap3_pm_init_cpuidle(rx51_cpuidle_params);
omap_serial_init();
sdrc_params = nokia_get_sdram_timings();

298
arch/arm/mach-omap2/cpuidle34xx.c
View file

@ -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;
}
/*
* 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;
}
/* 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;
}
}
/*
* 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__);

126
arch/arm/mach-omap2/cpuidle44xx.c
View file

@ -24,26 +24,31 @@
#ifdef CONFIG_CPU_IDLE
/* Machine specific information to be recorded in the C-state driver_data */
/* Machine specific information */
struct omap4_idle_statedata {
u32 cpu_state;
u32 mpu_logic_state;
u32 mpu_state;
u8 valid;
};
static struct cpuidle_params cpuidle_params_table[] = {
/* C1 - CPU0 ON + CPU1 ON + MPU ON */
{.exit_latency = 2 + 2 , .target_residency = 5, .valid = 1},
/* C2- CPU0 OFF + CPU1 OFF + MPU CSWR */
{.exit_latency = 328 + 440 , .target_residency = 960, .valid = 1},
/* C3 - CPU0 OFF + CPU1 OFF + MPU OSWR */
{.exit_latency = 460 + 518 , .target_residency = 1100, .valid = 1},
static struct omap4_idle_statedata omap4_idle_data[] = {
{
.cpu_state = PWRDM_POWER_ON,
.mpu_state = PWRDM_POWER_ON,
.mpu_logic_state = PWRDM_POWER_RET,
},
{
.cpu_state = PWRDM_POWER_OFF,
.mpu_state = PWRDM_POWER_RET,
.mpu_logic_state = PWRDM_POWER_RET,
},
{
.cpu_state = PWRDM_POWER_OFF,
.mpu_state = PWRDM_POWER_RET,
.mpu_logic_state = PWRDM_POWER_OFF,
},
};
#define OMAP4_NUM_STATES ARRAY_SIZE(cpuidle_params_table)
struct omap4_idle_statedata omap4_idle_data[OMAP4_NUM_STATES];
static struct powerdomain *mpu_pd, *cpu0_pd, *cpu1_pd;
/**
@ -60,8 +65,7 @@ static int omap4_enter_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
struct omap4_idle_statedata *cx =
cpuidle_get_statedata(&dev->states_usage[index]);
struct omap4_idle_statedata *cx = &omap4_idle_data[index];
u32 cpu1_state;
int cpu_id = smp_processor_id();
@ -78,7 +82,7 @@ static int omap4_enter_idle(struct cpuidle_device *dev,
cpu1_state = pwrdm_read_pwrst(cpu1_pd);
if (cpu1_state != PWRDM_POWER_OFF) {
index = drv->safe_state_index;
cx = cpuidle_get_statedata(&dev->states_usage[index]);
cx = &omap4_idle_data[index];
}
if (index > 0)
@ -133,36 +137,39 @@ 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,
.name = "C1",
.desc = "MPUSS ON"
},
{
/* C2 - CPU0 OFF + CPU1 OFF + MPU CSWR */
.exit_latency = 328 + 440,
.target_residency = 960,
.flags = CPUIDLE_FLAG_TIME_VALID,
.enter = omap4_enter_idle,
.name = "C2",
.desc = "MPUSS CSWR",
},
{
/* C3 - CPU0 OFF + CPU1 OFF + MPU OSWR */
.exit_latency = 460 + 518,
.target_residency = 1100,
.flags = CPUIDLE_FLAG_TIME_VALID,
.enter = omap4_enter_idle,
.name = "C3",
.desc = "MPUSS OSWR",
},
},
.state_count = ARRAY_SIZE(omap4_idle_data),
.safe_state_index = 0,
};
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 = omap4_enter_idle;
sprintf(state->name, "C%d", idx + 1);
strncpy(state->desc, descr, CPUIDLE_DESC_LEN);
}
static inline struct omap4_idle_statedata *_fill_cstate_usage(
struct cpuidle_device *dev,
int idx)
{
struct omap4_idle_statedata *cx = &omap4_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;
}
/**
* omap4_idle_init - Init routine for OMAP4 idle
*
@ -171,9 +178,7 @@ static inline struct omap4_idle_statedata *_fill_cstate_usage(
*/
int __init omap4_idle_init(void)
{
struct omap4_idle_statedata *cx;
struct cpuidle_device *dev;
struct cpuidle_driver *drv = &omap4_idle_driver;
unsigned int cpu_id = 0;
mpu_pd = pwrdm_lookup("mpu_pwrdm");
@ -182,42 +187,15 @@ int __init omap4_idle_init(void)
if ((!mpu_pd) || (!cpu0_pd) || (!cpu1_pd))
return -ENODEV;
drv->safe_state_index = -1;
dev = &per_cpu(omap4_idle_dev, cpu_id);
dev->cpu = cpu_id;
/* C1 - CPU0 ON + CPU1 ON + MPU ON */
_fill_cstate(drv, 0, "MPUSS ON");
drv->safe_state_index = 0;
cx = _fill_cstate_usage(dev, 0);
cx->valid = 1; /* C1 is always valid */
cx->cpu_state = PWRDM_POWER_ON;
cx->mpu_state = PWRDM_POWER_ON;
cx->mpu_logic_state = PWRDM_POWER_RET;
/* C2 - CPU0 OFF + CPU1 OFF + MPU CSWR */
_fill_cstate(drv, 1, "MPUSS CSWR");
cx = _fill_cstate_usage(dev, 1);
cx->cpu_state = PWRDM_POWER_OFF;
cx->mpu_state = PWRDM_POWER_RET;
cx->mpu_logic_state = PWRDM_POWER_RET;
/* C3 - CPU0 OFF + CPU1 OFF + MPU OSWR */
_fill_cstate(drv, 2, "MPUSS OSWR");
cx = _fill_cstate_usage(dev, 2);
cx->cpu_state = PWRDM_POWER_OFF;
cx->mpu_state = PWRDM_POWER_RET;
cx->mpu_logic_state = PWRDM_POWER_OFF;
drv->state_count = OMAP4_NUM_STATES;
cpuidle_register_driver(&omap4_idle_driver);
dev->state_count = OMAP4_NUM_STATES;
if (cpuidle_register_device(dev)) {
pr_err("%s: CPUidle register device failed\n", __func__);
return -EIO;
}
return -EIO;
}
return 0;
}

21
arch/arm/mach-omap2/pm.h
View file

@ -38,27 +38,6 @@ static inline int omap4_opp_init(void)
}
#endif
/*
* cpuidle mach specific parameters
*
* The board code can override the default C-states definition using
* omap3_pm_init_cpuidle
*/
struct cpuidle_params {
u32 exit_latency; /* exit_latency = sleep + wake-up latencies */
u32 target_residency;
u8 valid; /* validates the C-state */
};
#if defined(CONFIG_PM) && defined(CONFIG_CPU_IDLE)
extern void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params);
#else
static
inline void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
{
}
#endif
extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm);
extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state);