23  * DOC: IPA Power Management
26  * interconnects (buses) it depends on are enabled.  Runtime power
38  * enum ipa_power_flag - IPA power flags
43  * @IPA_POWER_FLAG_COUNT:	Number of defined power flags
54  * struct ipa_power - IPA power management information
67 	spinlock_t spinlock;	/* used with STOPPED/STARTED power flags */
74 static int ipa_interconnect_init(struct ipa_power *power,  in ipa_interconnect_init()  argument
82 	interconnect = &power->interconnect[0];  in ipa_interconnect_init()
83 	for (i = 0; i < power->interconnect_count; i++) {  in ipa_interconnect_init()
92 	ret = of_icc_bulk_get(power->dev, power->interconnect_count,  in ipa_interconnect_init()
93 			      power->interconnect);  in ipa_interconnect_init()
98 	icc_bulk_disable(power->interconnect_count, power->interconnect);  in ipa_interconnect_init()
101 	ret = icc_bulk_set_bw(power->interconnect_count, power->interconnect);  in ipa_interconnect_init()
103 		icc_bulk_put(power->interconnect_count, power->interconnect);  in ipa_interconnect_init()
109 static void ipa_interconnect_exit(struct ipa_power *power)  in ipa_interconnect_exit()  argument
111 	icc_bulk_put(power->interconnect_count, power->interconnect);  in ipa_interconnect_exit()
114 /* Enable IPA power, enabling interconnects and the core clock */
117 	struct ipa_power *power = ipa->power;  in ipa_power_enable()  local
120 	ret = icc_bulk_enable(power->interconnect_count, power->interconnect);  in ipa_power_enable()
124 	ret = clk_prepare_enable(power->core);  in ipa_power_enable()
126 		dev_err(power->dev, "error %d enabling core clock\n", ret);  in ipa_power_enable()
127 		icc_bulk_disable(power->interconnect_count,  in ipa_power_enable()
128 				 power->interconnect);  in ipa_power_enable()
137 	struct ipa_power *power = ipa->power;  in ipa_power_disable()  local
139 	clk_disable_unprepare(power->core);  in ipa_power_disable()
141 	icc_bulk_disable(power->interconnect_count, power->interconnect);  in ipa_power_disable()
150 		__clear_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags);  in ipa_runtime_suspend()
182 	__set_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags);  in ipa_suspend()
205 	__clear_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags);  in ipa_resume()
219 	return ipa->power ? (u32)clk_get_rate(ipa->power->core) : 0;  in ipa_core_clock_rate()
228 	if (!__test_and_set_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags))  in ipa_power_suspend_handler()
229 		if (test_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags))  in ipa_power_suspend_handler()
239  * Transmit can be running concurrent with power resume, and there's a
247  * power flag is set.  And if the queue is started, the STARTED flag is set.
257  * from the power ->runtime_resume operation.
261 	struct ipa_power *power = ipa->power;  in ipa_power_modem_queue_stop()  local
264 	spin_lock_irqsave(&power->spinlock, flags);  in ipa_power_modem_queue_stop()
266 	if (!__test_and_clear_bit(IPA_POWER_FLAG_STARTED, power->flags)) {  in ipa_power_modem_queue_stop()
268 		__set_bit(IPA_POWER_FLAG_STOPPED, power->flags);  in ipa_power_modem_queue_stop()
271 	spin_unlock_irqrestore(&power->spinlock, flags);  in ipa_power_modem_queue_stop()
281 	struct ipa_power *power = ipa->power;  in ipa_power_modem_queue_wake()  local
284 	spin_lock_irqsave(&power->spinlock, flags);  in ipa_power_modem_queue_wake()
286 	if (__test_and_clear_bit(IPA_POWER_FLAG_STOPPED, power->flags)) {  in ipa_power_modem_queue_wake()
287 		__set_bit(IPA_POWER_FLAG_STARTED, power->flags);  in ipa_power_modem_queue_wake()
291 	spin_unlock_irqrestore(&power->spinlock, flags);  in ipa_power_modem_queue_wake()
297 	clear_bit(IPA_POWER_FLAG_STARTED, ipa->power->flags);  in ipa_power_modem_queue_active()
300 static int ipa_power_retention_init(struct ipa_power *power)  in ipa_power_retention_init()  argument
302 	struct qmp *qmp = qmp_get(power->dev);  in ipa_power_retention_init()
311 	power->qmp = qmp;  in ipa_power_retention_init()
316 static void ipa_power_retention_exit(struct ipa_power *power)  in ipa_power_retention_exit()  argument
318 	qmp_put(power->qmp);  in ipa_power_retention_exit()
319 	power->qmp = NULL;  in ipa_power_retention_exit()
322 /* Control register retention on power collapse */
326 	struct ipa_power *power = ipa->power;  in ipa_power_retention()  local
329 	if (!power->qmp)  in ipa_power_retention()
332 	ret = qmp_send(power->qmp, fmt, enable ? '1' : '0');  in ipa_power_retention()
334 		dev_err(power->dev, "error %d sending QMP %sable request\n",  in ipa_power_retention()
357 /* Initialize IPA power management */
361 	struct ipa_power *power;  in ipa_power_init()  local
380 	size = struct_size(power, interconnect, data->interconnect_count);  in ipa_power_init()
381 	power = kzalloc(size, GFP_KERNEL);  in ipa_power_init()
382 	if (!power) {  in ipa_power_init()
386 	power->dev = dev;  in ipa_power_init()
387 	power->core = clk;  in ipa_power_init()
388 	spin_lock_init(&power->spinlock);  in ipa_power_init()
389 	power->interconnect_count = data->interconnect_count;  in ipa_power_init()
391 	ret = ipa_interconnect_init(power, data->interconnect_data);  in ipa_power_init()
395 	ret = ipa_power_retention_init(power);  in ipa_power_init()
403 	return power;  in ipa_power_init()
406 	ipa_interconnect_exit(power);  in ipa_power_init()
408 	kfree(power);  in ipa_power_init()
416 void ipa_power_exit(struct ipa_power *power)  in ipa_power_exit()  argument
418 	struct device *dev = power->dev;  in ipa_power_exit()
419 	struct clk *clk = power->core;  in ipa_power_exit()
423 	ipa_power_retention_exit(power);  in ipa_power_exit()
424 	ipa_interconnect_exit(power);  in ipa_power_exit()
425 	kfree(power);  in ipa_power_exit()