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Commit 23d69925 authored by Ashay Jaiswal's avatar Ashay Jaiswal
Browse files

power: qpnp-linear-charger: Add over temperature irq handler 



Over-temperature interrupt triggers when temperature of the
charger crosses threshold.
Add a handler to log message for this event.

Change-Id: Ia64a71528515820f67101b9490c9513a180c0fc8
Signed-off-by: default avatarAshay Jaiswal <ashayj@codeaurora.org>
parent 448a3061

drivers/power/qpnp-linear-charger.c

+31 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
/* Interrupt offsets */

#define INT_RT_STS_REG				0x10

#define FAST_CHG_ON_IRQ                         BIT(5)

#define OVERTEMP_ON_IRQ				BIT(4)

#define BAT_TEMP_OK_IRQ                         BIT(1)

#define BATT_PRES_IRQ                           BIT(0)
@@ -1788,6 +1789,33 @@ static irqreturn_t qpnp_lbc_vbatdet_lo_irq_handler(int irq, void *_chip) 
	return IRQ_HANDLED;

}



static int qpnp_lbc_is_overtemp(struct qpnp_lbc_chip *chip)

{

	u8 reg_val;

	int rc;



	rc = qpnp_lbc_read(chip, chip->usb_chgpth_base + INT_RT_STS_REG,

				&reg_val, 1);

	if (rc) {

		pr_err("Failed to read interrupt status rc=%d\n", rc);

		return rc;

	}



	pr_debug("OVERTEMP rt status %x\n", reg_val);

	return (reg_val & OVERTEMP_ON_IRQ) ? 1 : 0;

}



static irqreturn_t qpnp_lbc_usb_overtemp_irq_handler(int irq, void *_chip)

{

	struct qpnp_lbc_chip *chip = _chip;

	int overtemp = qpnp_lbc_is_overtemp(chip);



	pr_warn_ratelimited("charger %s temperature limit !!!\n",

					overtemp ? "exceeds" : "within");



	return IRQ_HANDLED;

}



#define SPMI_REQUEST_IRQ(chip, idx, rc, irq_name, threaded, flags, wake)\

do {									\

	if (rc)								\
@@ -1854,6 +1882,9 @@ static int qpnp_lbc_request_irqs(struct qpnp_lbc_chip *chip) 
	SPMI_REQUEST_IRQ(chip, USBIN_VALID, rc, usbin_valid, 0,

			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, 1);



	SPMI_REQUEST_IRQ(chip, USB_OVER_TEMP, rc, usb_overtemp, 0,

			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, 0);



	return 0;

}