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Commit 0d844173 authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar
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qcom-charger: smb-lib: support input limited state property 



Add support to indicate if the switcher is acting in input limited state.
Switcher running in high duty cycle (HDC) mode should also be indicated as
input limited condition.
HDC is a 5uS pulse and sw reading the real time status register may not
indicate that it is active. Basically the presence of the pulses and the
interrupts indicate HDC and conversely their absence indicates no
HDC. Set a flag in the interrupt and clear it in a delayed work queue in
20mS. As long as the interrupts happen this flag will remain set,
indicating HDC.

Change-Id: Ia2e2d02240c36ba982f9e190b88b822b5f1b90f1
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent 3dc7ca5e

drivers/power/qcom-charger/qpnp-smb2.c

+5 −1
Original line number Diff line number Diff line
@@ -588,6 +588,7 @@ static enum power_supply_property smb2_batt_props[] = { 
	POWER_SUPPLY_PROP_SYSTEM_TEMP_LEVEL,

	POWER_SUPPLY_PROP_CHARGER_TEMP,

	POWER_SUPPLY_PROP_CHARGER_TEMP_MAX,

	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMITED,

};



static int smb2_batt_get_prop(struct power_supply *psy,
@@ -625,6 +626,9 @@ static int smb2_batt_get_prop(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_CHARGER_TEMP_MAX:

		rc = smblib_get_prop_charger_temp_max(chg, val);

		break;

	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMITED:

		rc = smblib_get_prop_input_current_limited(chg, val);

		break;

	default:

		pr_err("batt power supply prop %d not supported\n", psp);

		return -EINVAL;
@@ -1121,7 +1125,7 @@ static struct smb2_irq_info smb2_irqs[] = { 
	{ "wdog-bark",			NULL },

	{ "aicl-fail",			smblib_handle_debug },

	{ "aicl-done",			smblib_handle_debug },

	{ "high-duty-cycle",		smblib_handle_debug },

	{ "high-duty-cycle",		smblib_handle_high_duty_cycle, true },

	{ "input-current-limiting",	smblib_handle_debug },

	{ "temperature-change",		smblib_handle_debug },

	{ "switcher-power-ok",		smblib_handle_debug },

drivers/power/qcom-charger/smb-lib.c

+35 −0
Original line number Diff line number Diff line
@@ -988,6 +988,21 @@ int smblib_get_prop_system_temp_level(struct smb_charger *chg, 
	return 0;

}



int smblib_get_prop_input_current_limited(struct smb_charger *chg,

				union power_supply_propval *val)

{

	u8 stat;

	int rc;



	rc = smblib_read(chg, AICL_STATUS_REG, &stat);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't read AICL_STATUS rc=%d\n", rc);

		return rc;

	}

	val->intval = (stat & SOFT_ILIMIT_BIT) || chg->is_hdc;

	return 0;

}



/***********************

 * BATTERY PSY SETTERS *

 ***********************/
@@ -1965,6 +1980,17 @@ irqreturn_t smblib_handle_usb_typec_change(int irq, void *data) 
	return IRQ_HANDLED;

}



irqreturn_t smblib_handle_high_duty_cycle(int irq, void *data)

{

	struct smb_irq_data *irq_data = data;

	struct smb_charger *chg = irq_data->parent_data;



	chg->is_hdc = true;

	schedule_delayed_work(&chg->clear_hdc_work, msecs_to_jiffies(60));



	return IRQ_HANDLED;

}



/***************

 * Work Queues *

 ***************/
@@ -2054,6 +2080,14 @@ done: 
	vote(chg->awake_votable, PL_VOTER, false, 0);

}



static void clear_hdc_work(struct work_struct *work)

{

	struct smb_charger *chg = container_of(work, struct smb_charger,

						clear_hdc_work.work);



	chg->is_hdc = 0;

}



static int smblib_create_votables(struct smb_charger *chg)

{

	int rc = 0;
@@ -2194,6 +2228,7 @@ int smblib_init(struct smb_charger *chg) 
	INIT_DELAYED_WORK(&chg->hvdcp_detect_work, smblib_hvdcp_detect_work);

	INIT_DELAYED_WORK(&chg->pl_taper_work, smblib_pl_taper_work);

	INIT_DELAYED_WORK(&chg->step_soc_req_work, step_soc_req_work);

	INIT_DELAYED_WORK(&chg->clear_hdc_work, clear_hdc_work);

	chg->fake_capacity = -EINVAL;



	switch (chg->mode) {

drivers/power/qcom-charger/smb-lib.h

+5 −0
Original line number Diff line number Diff line
@@ -145,6 +145,7 @@ struct smb_charger { 
	struct delayed_work	ps_change_timeout_work;

	struct delayed_work	pl_taper_work;

	struct delayed_work	step_soc_req_work;

	struct delayed_work	clear_hdc_work;



	/* cached status */

	int			voltage_min_uv;
@@ -159,6 +160,7 @@ struct smb_charger { 
	int			fake_capacity;



	bool			step_chg_enabled;

	bool			is_hdc;

};



int smblib_read(struct smb_charger *chg, u16 addr, u8 *val);
@@ -202,6 +204,7 @@ irqreturn_t smblib_handle_usb_plugin(int irq, void *data); 
irqreturn_t smblib_handle_usb_source_change(int irq, void *data);

irqreturn_t smblib_handle_icl_change(int irq, void *data);

irqreturn_t smblib_handle_usb_typec_change(int irq, void *data);

irqreturn_t smblib_handle_high_duty_cycle(int irq, void *data);



int smblib_get_prop_input_suspend(struct smb_charger *chg,

				union power_supply_propval *val);
@@ -217,6 +220,8 @@ int smblib_get_prop_batt_health(struct smb_charger *chg, 
				union power_supply_propval *val);

int smblib_get_prop_system_temp_level(struct smb_charger *chg,

				union power_supply_propval *val);

int smblib_get_prop_input_current_limited(struct smb_charger *chg,

				union power_supply_propval *val);



int smblib_set_prop_input_suspend(struct smb_charger *chg,

				const union power_supply_propval *val);