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-rw-r--r--drivers/ufs/core/ufshcd.c253
-rw-r--r--include/ufs/ufshcd.h25
2 files changed, 140 insertions, 138 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 6a2685333076..bd2cc2fdb5ba 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -258,10 +258,15 @@ ufs_get_desired_pm_lvl_for_dev_link_state(enum ufs_dev_pwr_mode dev_state,
return UFS_PM_LVL_0;
}
+static bool ufshcd_has_pending_tasks(struct ufs_hba *hba)
+{
+ return hba->outstanding_tasks || hba->active_uic_cmd ||
+ hba->uic_async_done;
+}
+
static bool ufshcd_is_ufs_dev_busy(struct ufs_hba *hba)
{
- return (hba->clk_gating.active_reqs || hba->outstanding_reqs || hba->outstanding_tasks ||
- hba->active_uic_cmd || hba->uic_async_done);
+ return hba->outstanding_reqs || ufshcd_has_pending_tasks(hba);
}
static const struct ufs_dev_quirk ufs_fixups[] = {
@@ -1447,16 +1452,16 @@ static void ufshcd_clk_scaling_suspend_work(struct work_struct *work)
{
struct ufs_hba *hba = container_of(work, struct ufs_hba,
clk_scaling.suspend_work);
- unsigned long irq_flags;
- spin_lock_irqsave(hba->host->host_lock, irq_flags);
- if (hba->clk_scaling.active_reqs || hba->clk_scaling.is_suspended) {
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
- return;
+ scoped_guard(spinlock_irqsave, &hba->clk_scaling.lock)
+ {
+ if (hba->clk_scaling.active_reqs ||
+ hba->clk_scaling.is_suspended)
+ return;
+
+ hba->clk_scaling.is_suspended = true;
+ hba->clk_scaling.window_start_t = 0;
}
- hba->clk_scaling.is_suspended = true;
- hba->clk_scaling.window_start_t = 0;
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
devfreq_suspend_device(hba->devfreq);
}
@@ -1465,15 +1470,13 @@ static void ufshcd_clk_scaling_resume_work(struct work_struct *work)
{
struct ufs_hba *hba = container_of(work, struct ufs_hba,
clk_scaling.resume_work);
- unsigned long irq_flags;
- spin_lock_irqsave(hba->host->host_lock, irq_flags);
- if (!hba->clk_scaling.is_suspended) {
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
- return;
+ scoped_guard(spinlock_irqsave, &hba->clk_scaling.lock)
+ {
+ if (!hba->clk_scaling.is_suspended)
+ return;
+ hba->clk_scaling.is_suspended = false;
}
- hba->clk_scaling.is_suspended = false;
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
devfreq_resume_device(hba->devfreq);
}
@@ -1487,7 +1490,6 @@ static int ufshcd_devfreq_target(struct device *dev,
bool scale_up = false, sched_clk_scaling_suspend_work = false;
struct list_head *clk_list = &hba->clk_list_head;
struct ufs_clk_info *clki;
- unsigned long irq_flags;
if (!ufshcd_is_clkscaling_supported(hba))
return -EINVAL;
@@ -1508,43 +1510,38 @@ static int ufshcd_devfreq_target(struct device *dev,
*freq = (unsigned long) clk_round_rate(clki->clk, *freq);
}
- spin_lock_irqsave(hba->host->host_lock, irq_flags);
- if (ufshcd_eh_in_progress(hba)) {
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
- return 0;
- }
+ scoped_guard(spinlock_irqsave, &hba->clk_scaling.lock)
+ {
+ if (ufshcd_eh_in_progress(hba))
+ return 0;
- /* Skip scaling clock when clock scaling is suspended */
- if (hba->clk_scaling.is_suspended) {
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
- dev_warn(hba->dev, "clock scaling is suspended, skip");
- return 0;
- }
+ /* Skip scaling clock when clock scaling is suspended */
+ if (hba->clk_scaling.is_suspended) {
+ dev_warn(hba->dev, "clock scaling is suspended, skip");
+ return 0;
+ }
- if (!hba->clk_scaling.active_reqs)
- sched_clk_scaling_suspend_work = true;
+ if (!hba->clk_scaling.active_reqs)
+ sched_clk_scaling_suspend_work = true;
- if (list_empty(clk_list)) {
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
- goto out;
- }
+ if (list_empty(clk_list))
+ goto out;
- /* Decide based on the target or rounded-off frequency and update */
- if (hba->use_pm_opp)
- scale_up = *freq > hba->clk_scaling.target_freq;
- else
- scale_up = *freq == clki->max_freq;
+ /* Decide based on the target or rounded-off frequency and update */
+ if (hba->use_pm_opp)
+ scale_up = *freq > hba->clk_scaling.target_freq;
+ else
+ scale_up = *freq == clki->max_freq;
- if (!hba->use_pm_opp && !scale_up)
- *freq = clki->min_freq;
+ if (!hba->use_pm_opp && !scale_up)
+ *freq = clki->min_freq;
- /* Update the frequency */
- if (!ufshcd_is_devfreq_scaling_required(hba, *freq, scale_up)) {
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
- ret = 0;
- goto out; /* no state change required */
+ /* Update the frequency */
+ if (!ufshcd_is_devfreq_scaling_required(hba, *freq, scale_up)) {
+ ret = 0;
+ goto out; /* no state change required */
+ }
}
- spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
start = ktime_get();
ret = ufshcd_devfreq_scale(hba, *freq, scale_up);
@@ -1569,7 +1566,6 @@ static int ufshcd_devfreq_get_dev_status(struct device *dev,
{
struct ufs_hba *hba = dev_get_drvdata(dev);
struct ufs_clk_scaling *scaling = &hba->clk_scaling;
- unsigned long flags;
ktime_t curr_t;
if (!ufshcd_is_clkscaling_supported(hba))
@@ -1577,7 +1573,8 @@ static int ufshcd_devfreq_get_dev_status(struct device *dev,
memset(stat, 0, sizeof(*stat));
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_scaling.lock);
+
curr_t = ktime_get();
if (!scaling->window_start_t)
goto start_window;
@@ -1613,7 +1610,7 @@ start_window:
scaling->busy_start_t = 0;
scaling->is_busy_started = false;
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+
return 0;
}
@@ -1677,19 +1674,19 @@ static void ufshcd_devfreq_remove(struct ufs_hba *hba)
static void ufshcd_suspend_clkscaling(struct ufs_hba *hba)
{
- unsigned long flags;
bool suspend = false;
cancel_work_sync(&hba->clk_scaling.suspend_work);
cancel_work_sync(&hba->clk_scaling.resume_work);
- spin_lock_irqsave(hba->host->host_lock, flags);
- if (!hba->clk_scaling.is_suspended) {
- suspend = true;
- hba->clk_scaling.is_suspended = true;
- hba->clk_scaling.window_start_t = 0;
+ scoped_guard(spinlock_irqsave, &hba->clk_scaling.lock)
+ {
+ if (!hba->clk_scaling.is_suspended) {
+ suspend = true;
+ hba->clk_scaling.is_suspended = true;
+ hba->clk_scaling.window_start_t = 0;
+ }
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
if (suspend)
devfreq_suspend_device(hba->devfreq);
@@ -1697,15 +1694,15 @@ static void ufshcd_suspend_clkscaling(struct ufs_hba *hba)
static void ufshcd_resume_clkscaling(struct ufs_hba *hba)
{
- unsigned long flags;
bool resume = false;
- spin_lock_irqsave(hba->host->host_lock, flags);
- if (hba->clk_scaling.is_suspended) {
- resume = true;
- hba->clk_scaling.is_suspended = false;
+ scoped_guard(spinlock_irqsave, &hba->clk_scaling.lock)
+ {
+ if (hba->clk_scaling.is_suspended) {
+ resume = true;
+ hba->clk_scaling.is_suspended = false;
+ }
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
if (resume)
devfreq_resume_device(hba->devfreq);
@@ -1791,6 +1788,8 @@ static void ufshcd_init_clk_scaling(struct ufs_hba *hba)
INIT_WORK(&hba->clk_scaling.resume_work,
ufshcd_clk_scaling_resume_work);
+ spin_lock_init(&hba->clk_scaling.lock);
+
hba->clk_scaling.workq = alloc_ordered_workqueue(
"ufs_clkscaling_%d", WQ_MEM_RECLAIM, hba->host->host_no);
@@ -1811,19 +1810,16 @@ static void ufshcd_exit_clk_scaling(struct ufs_hba *hba)
static void ufshcd_ungate_work(struct work_struct *work)
{
int ret;
- unsigned long flags;
struct ufs_hba *hba = container_of(work, struct ufs_hba,
clk_gating.ungate_work);
cancel_delayed_work_sync(&hba->clk_gating.gate_work);
- spin_lock_irqsave(hba->host->host_lock, flags);
- if (hba->clk_gating.state == CLKS_ON) {
- spin_unlock_irqrestore(hba->host->host_lock, flags);
- return;
+ scoped_guard(spinlock_irqsave, &hba->clk_gating.lock) {
+ if (hba->clk_gating.state == CLKS_ON)
+ return;
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
ufshcd_hba_vreg_set_hpm(hba);
ufshcd_setup_clocks(hba, true);
@@ -1858,7 +1854,7 @@ void ufshcd_hold(struct ufs_hba *hba)
if (!ufshcd_is_clkgating_allowed(hba) ||
!hba->clk_gating.is_initialized)
return;
- spin_lock_irqsave(hba->host->host_lock, flags);
+ spin_lock_irqsave(&hba->clk_gating.lock, flags);
hba->clk_gating.active_reqs++;
start:
@@ -1874,11 +1870,11 @@ start:
*/
if (ufshcd_can_hibern8_during_gating(hba) &&
ufshcd_is_link_hibern8(hba)) {
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+ spin_unlock_irqrestore(&hba->clk_gating.lock, flags);
flush_result = flush_work(&hba->clk_gating.ungate_work);
if (hba->clk_gating.is_suspended && !flush_result)
return;
- spin_lock_irqsave(hba->host->host_lock, flags);
+ spin_lock_irqsave(&hba->clk_gating.lock, flags);
goto start;
}
break;
@@ -1907,17 +1903,17 @@ start:
*/
fallthrough;
case REQ_CLKS_ON:
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+ spin_unlock_irqrestore(&hba->clk_gating.lock, flags);
flush_work(&hba->clk_gating.ungate_work);
/* Make sure state is CLKS_ON before returning */
- spin_lock_irqsave(hba->host->host_lock, flags);
+ spin_lock_irqsave(&hba->clk_gating.lock, flags);
goto start;
default:
dev_err(hba->dev, "%s: clk gating is in invalid state %d\n",
__func__, hba->clk_gating.state);
break;
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+ spin_unlock_irqrestore(&hba->clk_gating.lock, flags);
}
EXPORT_SYMBOL_GPL(ufshcd_hold);
@@ -1925,28 +1921,32 @@ static void ufshcd_gate_work(struct work_struct *work)
{
struct ufs_hba *hba = container_of(work, struct ufs_hba,
clk_gating.gate_work.work);
- unsigned long flags;
int ret;
- spin_lock_irqsave(hba->host->host_lock, flags);
- /*
- * In case you are here to cancel this work the gating state
- * would be marked as REQ_CLKS_ON. In this case save time by
- * skipping the gating work and exit after changing the clock
- * state to CLKS_ON.
- */
- if (hba->clk_gating.is_suspended ||
- (hba->clk_gating.state != REQ_CLKS_OFF)) {
- hba->clk_gating.state = CLKS_ON;
- trace_ufshcd_clk_gating(dev_name(hba->dev),
- hba->clk_gating.state);
- goto rel_lock;
- }
+ scoped_guard(spinlock_irqsave, &hba->clk_gating.lock) {
+ /*
+ * In case you are here to cancel this work the gating state
+ * would be marked as REQ_CLKS_ON. In this case save time by
+ * skipping the gating work and exit after changing the clock
+ * state to CLKS_ON.
+ */
+ if (hba->clk_gating.is_suspended ||
+ hba->clk_gating.state != REQ_CLKS_OFF) {
+ hba->clk_gating.state = CLKS_ON;
+ trace_ufshcd_clk_gating(dev_name(hba->dev),
+ hba->clk_gating.state);
+ return;
+ }
- if (ufshcd_is_ufs_dev_busy(hba) || hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
- goto rel_lock;
+ if (hba->clk_gating.active_reqs)
+ return;
+ }
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+ scoped_guard(spinlock_irqsave, hba->host->host_lock) {
+ if (ufshcd_is_ufs_dev_busy(hba) ||
+ hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
+ return;
+ }
/* put the link into hibern8 mode before turning off clocks */
if (ufshcd_can_hibern8_during_gating(hba)) {
@@ -1957,7 +1957,7 @@ static void ufshcd_gate_work(struct work_struct *work)
__func__, ret);
trace_ufshcd_clk_gating(dev_name(hba->dev),
hba->clk_gating.state);
- goto out;
+ return;
}
ufshcd_set_link_hibern8(hba);
}
@@ -1977,33 +1977,34 @@ static void ufshcd_gate_work(struct work_struct *work)
* prevent from doing cancel work multiple times when there are
* new requests arriving before the current cancel work is done.
*/
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_gating.lock);
if (hba->clk_gating.state == REQ_CLKS_OFF) {
hba->clk_gating.state = CLKS_OFF;
trace_ufshcd_clk_gating(dev_name(hba->dev),
hba->clk_gating.state);
}
-rel_lock:
- spin_unlock_irqrestore(hba->host->host_lock, flags);
-out:
- return;
}
-/* host lock must be held before calling this variant */
static void __ufshcd_release(struct ufs_hba *hba)
{
+ lockdep_assert_held(&hba->clk_gating.lock);
+
if (!ufshcd_is_clkgating_allowed(hba))
return;
hba->clk_gating.active_reqs--;
if (hba->clk_gating.active_reqs || hba->clk_gating.is_suspended ||
- hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL ||
- hba->outstanding_tasks || !hba->clk_gating.is_initialized ||
- hba->active_uic_cmd || hba->uic_async_done ||
+ !hba->clk_gating.is_initialized ||
hba->clk_gating.state == CLKS_OFF)
return;
+ scoped_guard(spinlock_irqsave, hba->host->host_lock) {
+ if (ufshcd_has_pending_tasks(hba) ||
+ hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
+ return;
+ }
+
hba->clk_gating.state = REQ_CLKS_OFF;
trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state);
queue_delayed_work(hba->clk_gating.clk_gating_workq,
@@ -2013,11 +2014,8 @@ static void __ufshcd_release(struct ufs_hba *hba)
void ufshcd_release(struct ufs_hba *hba)
{
- unsigned long flags;
-
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_gating.lock);
__ufshcd_release(hba);
- spin_unlock_irqrestore(hba->host->host_lock, flags);
}
EXPORT_SYMBOL_GPL(ufshcd_release);
@@ -2032,11 +2030,9 @@ static ssize_t ufshcd_clkgate_delay_show(struct device *dev,
void ufshcd_clkgate_delay_set(struct device *dev, unsigned long value)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
- unsigned long flags;
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_gating.lock);
hba->clk_gating.delay_ms = value;
- spin_unlock_irqrestore(hba->host->host_lock, flags);
}
EXPORT_SYMBOL_GPL(ufshcd_clkgate_delay_set);
@@ -2064,7 +2060,6 @@ static ssize_t ufshcd_clkgate_enable_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
- unsigned long flags;
u32 value;
if (kstrtou32(buf, 0, &value))
@@ -2072,9 +2067,10 @@ static ssize_t ufshcd_clkgate_enable_store(struct device *dev,
value = !!value;
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_gating.lock);
+
if (value == hba->clk_gating.is_enabled)
- goto out;
+ return count;
if (value)
__ufshcd_release(hba);
@@ -2082,8 +2078,7 @@ static ssize_t ufshcd_clkgate_enable_store(struct device *dev,
hba->clk_gating.active_reqs++;
hba->clk_gating.is_enabled = value;
-out:
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+
return count;
}
@@ -2125,6 +2120,8 @@ static void ufshcd_init_clk_gating(struct ufs_hba *hba)
INIT_DELAYED_WORK(&hba->clk_gating.gate_work, ufshcd_gate_work);
INIT_WORK(&hba->clk_gating.ungate_work, ufshcd_ungate_work);
+ spin_lock_init(&hba->clk_gating.lock);
+
hba->clk_gating.clk_gating_workq = alloc_ordered_workqueue(
"ufs_clk_gating_%d", WQ_MEM_RECLAIM | WQ_HIGHPRI,
hba->host->host_no);
@@ -2154,19 +2151,17 @@ static void ufshcd_clk_scaling_start_busy(struct ufs_hba *hba)
{
bool queue_resume_work = false;
ktime_t curr_t = ktime_get();
- unsigned long flags;
if (!ufshcd_is_clkscaling_supported(hba))
return;
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_scaling.lock);
+
if (!hba->clk_scaling.active_reqs++)
queue_resume_work = true;
- if (!hba->clk_scaling.is_enabled || hba->pm_op_in_progress) {
- spin_unlock_irqrestore(hba->host->host_lock, flags);
+ if (!hba->clk_scaling.is_enabled || hba->pm_op_in_progress)
return;
- }
if (queue_resume_work)
queue_work(hba->clk_scaling.workq,
@@ -2182,18 +2177,17 @@ static void ufshcd_clk_scaling_start_busy(struct ufs_hba *hba)
hba->clk_scaling.busy_start_t = curr_t;
hba->clk_scaling.is_busy_started = true;
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
}
static void ufshcd_clk_scaling_update_busy(struct ufs_hba *hba)
{
struct ufs_clk_scaling *scaling = &hba->clk_scaling;
- unsigned long flags;
if (!ufshcd_is_clkscaling_supported(hba))
return;
- spin_lock_irqsave(hba->host->host_lock, flags);
+ guard(spinlock_irqsave)(&hba->clk_scaling.lock);
+
hba->clk_scaling.active_reqs--;
if (!scaling->active_reqs && scaling->is_busy_started) {
scaling->tot_busy_t += ktime_to_us(ktime_sub(ktime_get(),
@@ -2201,7 +2195,6 @@ static void ufshcd_clk_scaling_update_busy(struct ufs_hba *hba)
scaling->busy_start_t = 0;
scaling->is_busy_started = false;
}
- spin_unlock_irqrestore(hba->host->host_lock, flags);
}
static inline int ufshcd_monitor_opcode2dir(u8 opcode)
@@ -8221,7 +8214,9 @@ static void ufshcd_rtc_work(struct work_struct *work)
hba = container_of(to_delayed_work(work), struct ufs_hba, ufs_rtc_update_work);
/* Update RTC only when there are no requests in progress and UFSHCI is operational */
- if (!ufshcd_is_ufs_dev_busy(hba) && hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL)
+ if (!ufshcd_is_ufs_dev_busy(hba) &&
+ hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL &&
+ !hba->clk_gating.active_reqs)
ufshcd_update_rtc(hba);
if (ufshcd_is_ufs_dev_active(hba) && hba->dev_info.rtc_update_period)
@@ -9118,7 +9113,6 @@ static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on)
int ret = 0;
struct ufs_clk_info *clki;
struct list_head *head = &hba->clk_list_head;
- unsigned long flags;
ktime_t start = ktime_get();
bool clk_state_changed = false;
@@ -9169,11 +9163,10 @@ out:
clk_disable_unprepare(clki->clk);
}
} else if (!ret && on) {
- spin_lock_irqsave(hba->host->host_lock, flags);
- hba->clk_gating.state = CLKS_ON;
+ scoped_guard(spinlock_irqsave, &hba->clk_gating.lock)
+ hba->clk_gating.state = CLKS_ON;
trace_ufshcd_clk_gating(dev_name(hba->dev),
hba->clk_gating.state);
- spin_unlock_irqrestore(hba->host->host_lock, flags);
}
if (clk_state_changed)
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index d7aca9e61684..ce7667b020e2 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -403,6 +403,9 @@ enum clk_gating_state {
* delay_ms
* @ungate_work: worker to turn on clocks that will be used in case of
* interrupt context
+ * @clk_gating_workq: workqueue for clock gating work.
+ * @lock: serialize access to some struct ufs_clk_gating members. An outer lock
+ * relative to the host lock
* @state: the current clocks state
* @delay_ms: gating delay in ms
* @is_suspended: clk gating is suspended when set to 1 which can be used
@@ -413,11 +416,14 @@ enum clk_gating_state {
* @is_initialized: Indicates whether clock gating is initialized or not
* @active_reqs: number of requests that are pending and should be waited for
* completion before gating clocks.
- * @clk_gating_workq: workqueue for clock gating work.
*/
struct ufs_clk_gating {
struct delayed_work gate_work;
struct work_struct ungate_work;
+ struct workqueue_struct *clk_gating_workq;
+
+ spinlock_t lock;
+
enum clk_gating_state state;
unsigned long delay_ms;
bool is_suspended;
@@ -426,11 +432,14 @@ struct ufs_clk_gating {
bool is_enabled;
bool is_initialized;
int active_reqs;
- struct workqueue_struct *clk_gating_workq;
};
/**
* struct ufs_clk_scaling - UFS clock scaling related data
+ * @workq: workqueue to schedule devfreq suspend/resume work
+ * @suspend_work: worker to suspend devfreq
+ * @resume_work: worker to resume devfreq
+ * @lock: serialize access to some struct ufs_clk_scaling members
* @active_reqs: number of requests that are pending. If this is zero when
* devfreq ->target() function is called then schedule "suspend_work" to
* suspend devfreq.
@@ -440,9 +449,6 @@ struct ufs_clk_gating {
* @enable_attr: sysfs attribute to enable/disable clock scaling
* @saved_pwr_info: UFS power mode may also be changed during scaling and this
* one keeps track of previous power mode.
- * @workq: workqueue to schedule devfreq suspend/resume work
- * @suspend_work: worker to suspend devfreq
- * @resume_work: worker to resume devfreq
* @target_freq: frequency requested by devfreq framework
* @min_gear: lowest HS gear to scale down to
* @is_enabled: tracks if scaling is currently enabled or not, controlled by
@@ -454,15 +460,18 @@ struct ufs_clk_gating {
* @is_suspended: tracks if devfreq is suspended or not
*/
struct ufs_clk_scaling {
+ struct workqueue_struct *workq;
+ struct work_struct suspend_work;
+ struct work_struct resume_work;
+
+ spinlock_t lock;
+
int active_reqs;
unsigned long tot_busy_t;
ktime_t window_start_t;
ktime_t busy_start_t;
struct device_attribute enable_attr;
struct ufs_pa_layer_attr saved_pwr_info;
- struct workqueue_struct *workq;
- struct work_struct suspend_work;
- struct work_struct resume_work;
unsigned long target_freq;
u32 min_gear;
bool is_enabled;
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-24 17:01:27 +0000