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Commit 01806dea authored by Harry Yang's avatar Harry Yang
Browse files

power: smb1390: add wireless charging support 



Add parallel wireless charging support in SMB1390 driver,
maintaining ILIM = MIN(TOTAL_FCC/2, TOTAL_ICL), where
TOTAL_ICL is DC Input current limit.

Change-Id: I73444ee72ad10f9bf3aeb93d5859e58eba20080f
Signed-off-by: default avatarHarry Yang <harryy@codeaurora.org>
parent 2bf2ab5a

drivers/power/supply/qcom/smb1390-charger.c

+38 −8
Original line number Diff line number Diff line
@@ -86,7 +86,8 @@ 
#define ILIM_VOTER	"ILIM_VOTER"

#define FCC_VOTER	"FCC_VOTER"

#define ICL_VOTER	"ICL_VOTER"

#define USB_VOTER	"USB_VOTER"

#define WIRELESS_VOTER	"WIRELESS_VOTER"

#define SRC_VOTER	"SRC_VOTER"



enum {

	SWITCHER_OFF_WINDOW_IRQ = 0,
@@ -126,6 +127,7 @@ struct smb1390 { 
	/* power supplies */

	struct power_supply	*usb_psy;

	struct power_supply	*batt_psy;

	struct power_supply	*dc_psy;



	int			irqs[NUM_IRQS];

	bool			status_change_running;
@@ -184,6 +186,14 @@ static bool is_psy_voter_available(struct smb1390 *chip) 
		}

	}



	if (!chip->dc_psy) {

		chip->dc_psy = power_supply_get_by_name("dc");

		if (!chip->dc_psy) {

			pr_debug("Couldn't find dc psy\n");

			return false;

		}

	}



	if (!chip->fcc_votable) {

		chip->fcc_votable = find_votable("FCC");

		if (!chip->fcc_votable) {
@@ -479,19 +489,39 @@ static void smb1390_status_change_work(struct work_struct *work) 
	}



	if (pval.intval == POWER_SUPPLY_CHARGER_SEC_CP) {

		vote(chip->disable_votable, USB_VOTER, false, 0);

		rc = power_supply_get_property(chip->usb_psy,

				POWER_SUPPLY_PROP_SMB_EN_REASON, &pval);

		if (rc < 0) {

			pr_err("Couldn't get cp reason rc=%d\n", rc);

			goto out;

		}



		vote(chip->disable_votable, SRC_VOTER, false, 0);



		/*

		 * ILIM is set based on the primary chargers AICL result. This

		 * ensures VBUS does not collapse due to the current drawn via

		 * MID.

		 */

		if (pval.intval == POWER_SUPPLY_CP_WIRELESS) {

			vote(chip->ilim_votable, ICL_VOTER, false, 0);

			rc = power_supply_get_property(chip->dc_psy,

					POWER_SUPPLY_PROP_CURRENT_MAX, &pval);

			if (rc < 0)

				pr_err("Couldn't get dc icl rc=%d\n", rc);

			else

				vote(chip->ilim_votable, WIRELESS_VOTER, true,

								pval.intval);

		} else { /* QC3 or PPS */

			vote(chip->ilim_votable, WIRELESS_VOTER, false, 0);

			rc = power_supply_get_property(chip->usb_psy,

				POWER_SUPPLY_PROP_INPUT_CURRENT_SETTLED, &pval);

			if (rc < 0)

				pr_err("Couldn't get usb icl rc=%d\n", rc);

			else

			vote(chip->ilim_votable, ICL_VOTER, true, pval.intval);

				vote(chip->ilim_votable, ICL_VOTER, true,

								pval.intval);

		}



		/* input current is always half the charge current */

		vote(chip->ilim_votable, FCC_VOTER, true,
@@ -522,7 +552,7 @@ static void smb1390_status_change_work(struct work_struct *work) 
			}

		}

	} else {

		vote(chip->disable_votable, USB_VOTER, true, 0);

		vote(chip->disable_votable, SRC_VOTER, true, 0);

		vote(chip->fcc_votable, CP_VOTER, false, 0);

	}