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Commit f36f3de7 authored by Ashay Jaiswal's avatar Ashay Jaiswal
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power: qpnp-linear-charger: disable follow-on-reset for charger 



For testing purposes the charging needs to be disabled across reset.
Support this by disabling follow-on-reset.

Change-Id: Ib101177d56b63367f1858ba5a0307cf4f17f5f2f
Signed-off-by: default avatarAshay Jaiswal <ashayj@codeaurora.org>
parent d09bc854

Documentation/devicetree/bindings/power/qpnp-linear-charger.txt

+5 −0
Original line number Diff line number Diff line
@@ -86,6 +86,11 @@ Parent node optional properties: 
					BPD and disables BTC. Declare this node

					only if you are using an external charger

					and not the PMIC internal LBC.

- qcom,disable-follow-on-reset		If specified charger ignores PMIC

					reset signal.

					This should not be enabled for real

					world software. To be enabled only

					for testing.



Sub node required structure:

- A qcom,charger node must be a child of an SPMI node that has specified

drivers/power/qpnp-linear-charger.c

+25 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ 
#define CHG_TCHG_MAX_EN_REG			0x60

#define CHG_TCHG_MAX_REG			0x61

#define CHG_WDOG_EN_REG				0x65

#define CHG_PERPH_RESET_CTRL3_REG		0xDA

#define CHG_COMP_OVR1				0xEE

#define CHG_VBAT_DET_OVR_MASK			LBC_MASK(1, 0)

#define OVERRIDE_0				0x2
@@ -226,6 +227,7 @@ static char *pm_batt_supplied_to[] = { 
 * @cfg_tchg_mins:		maximum allowed software initiated charge time

 * @chg_failed_count:		counter to maintained number of times charging

 *				failed

 * @cfg_disable_follow_on_reset	charger ignore PMIC reset signal

 * @cfg_bpd_detection:		battery present detection mechanism selection

 * @cfg_thermal_levels:		amount of thermal mitigation levels

 * @cfg_thermal_mitigation:	thermal mitigation level values
@@ -275,6 +277,7 @@ struct qpnp_lbc_chip { 
	unsigned int			cfg_safe_current;

	unsigned int			cfg_tchg_mins;

	unsigned int			chg_failed_count;

	unsigned int			cfg_disable_follow_on_reset;

	int				cfg_bpd_detection;

	int				cfg_warm_bat_decidegc;

	int				cfg_cool_bat_decidegc;
@@ -1576,6 +1579,11 @@ static int qpnp_charger_read_dt_props(struct qpnp_lbc_chip *chip) 
			of_property_read_bool(chip->spmi->dev.of_node,

					"qcom,use-default-batt-values");



	/* Get peripheral reset configuration property */

	chip->cfg_disable_follow_on_reset =

			of_property_read_bool(chip->spmi->dev.of_node,

					"qcom,disable-follow-on-reset");



	/* Disable charging when faking battery values */

	if (chip->cfg_use_fake_battery)

		chip->cfg_charging_disabled = true;
@@ -1940,6 +1948,9 @@ static int qpnp_lbc_get_irqs(struct qpnp_lbc_chip *chip, u8 subtype, 
/* Get/Set initial state of charger */

static void determine_initial_status(struct qpnp_lbc_chip *chip)

{

	u8 reg_val;

	int rc;



	chip->usb_present = qpnp_lbc_is_usb_chg_plugged_in(chip);

	power_supply_set_present(chip->usb_psy, chip->usb_present);

	/*
@@ -1948,6 +1959,20 @@ static void determine_initial_status(struct qpnp_lbc_chip *chip) 
	 */

	if (chip->usb_present)

		power_supply_set_online(chip->usb_psy, 1);



	/*

	 * Configure peripheral reset control

	 * This is a workaround only for SLT testing.

	 */

	if (chip->cfg_disable_follow_on_reset) {

		reg_val = 0x0;

		rc = __qpnp_lbc_secure_write(chip->spmi, chip->chgr_base,

				CHG_PERPH_RESET_CTRL3_REG, &reg_val, 1);

		if (rc)

			pr_err("Failed to configure PERPH_CTRL3 rc=%d\n", rc);

		else

			pr_warn("Charger is not following PMIC reset\n");

	}

}



static int qpnp_lbc_probe(struct spmi_device *spmi)