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Commit e99b3376 authored by Vamshi Krishna B V's avatar Vamshi Krishna B V
Browse files

leds: qpnp-haptic: Manage the state of PON regulator 



Control the PON regulator (required to force MBG_ON) based on
the current state of haptic and maintain the regulator state
to avoid frequent enable/disable.

CRs-Fixed: 1111145
Change-Id: Ic7238a7828d1694192e890433d4247b25b5b15e1
Signed-off-by: default avatarVamshi Krishna B V <vbv@codeaurora.org>
parent b27bf012

Documentation/devicetree/bindings/leds/leds-qpnp-haptics.txt

+5 −0
Original line number Diff line number Diff line
@@ -116,6 +116,11 @@ Properties: 
  Definition: Short circuit debounce cycles for internal PWM.

		Allowed values: 0, 8, 16 or 32.



- vcc_pon-supply

  Usage:      optional

  Value type: <phandle>

  Definition: PON driver regulator required to force MBG_ON



Following properties are specific only to LRA vibrators.



- qcom,lra-auto-mode

drivers/leds/leds-qpnp-haptics.c

+33 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/platform_device.h>

#include <linux/pwm.h>

#include <linux/regmap.h>

#include <linux/regulator/consumer.h>

#include <linux/slab.h>

#include <linux/qpnp/qpnp-misc.h>

#include <linux/qpnp/qpnp-revid.h>
@@ -321,6 +322,7 @@ struct hap_chip { 
	int				sc_irq;

	struct pwm_param		pwm_data;

	struct hap_lra_ares_param	ares_cfg;

	struct regulator		*vcc_pon;

	u32				play_time_ms;

	u32				max_play_time_ms;

	u32				vmax_mv;
@@ -355,6 +357,7 @@ struct hap_chip { 
	bool				lra_auto_mode;

	bool				play_irq_en;

	bool				auto_res_err_recovery_hw;

	bool				vcc_pon_enabled;

};



static int qpnp_haptics_parse_buffer_dt(struct hap_chip *chip);
@@ -801,10 +804,29 @@ static void qpnp_haptics_work(struct work_struct *work) 


	enable = atomic_read(&chip->state);

	pr_debug("state: %d\n", enable);



	if (chip->vcc_pon && enable && !chip->vcc_pon_enabled) {

		rc = regulator_enable(chip->vcc_pon);

		if (rc < 0)

			pr_err("%s: could not enable vcc_pon regulator rc=%d\n",

				 __func__, rc);

		else

			chip->vcc_pon_enabled = true;

	}



	rc = qpnp_haptics_play(chip, enable);

	if (rc < 0)

		pr_err("Error in %sing haptics, rc=%d\n",

			enable ? "play" : "stopp", rc);



	if (chip->vcc_pon && !enable && chip->vcc_pon_enabled) {

		rc = regulator_disable(chip->vcc_pon);

		if (rc)

			pr_err("%s: could not disable vcc_pon regulator rc=%d\n",

				 __func__, rc);

		else

			chip->vcc_pon_enabled = false;

	}

}



static enum hrtimer_restart hap_stop_timer(struct hrtimer *timer)
@@ -2054,6 +2076,7 @@ static int qpnp_haptics_parse_dt(struct hap_chip *chip) 
	struct device_node *revid_node, *misc_node;

	const char *temp_str;

	int rc, temp;

	struct regulator *vcc_pon;



	rc = of_property_read_u32(node, "reg", &temp);

	if (rc < 0) {
@@ -2381,6 +2404,16 @@ static int qpnp_haptics_parse_dt(struct hap_chip *chip) 
	else if (chip->play_mode == HAP_PWM)

		rc = qpnp_haptics_parse_pwm_dt(chip);



	if (of_find_property(node, "vcc_pon-supply", NULL)) {

		vcc_pon = regulator_get(&chip->pdev->dev, "vcc_pon");

		if (IS_ERR(vcc_pon)) {

			rc = PTR_ERR(vcc_pon);

			dev_err(&chip->pdev->dev,

				"regulator get failed vcc_pon rc=%d\n", rc);

		}

		chip->vcc_pon = vcc_pon;

	}



	return rc;

}