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Commit 01e81683 authored by Anirudh Ghayal's avatar Anirudh Ghayal Committed by Xiaozhe Shi
Browse files

power: qpnp-smbcharger: Update charger configuration based on battery type 



Use batt-id information from FG to detect the battery-profile
in use and update the charger configuration from the profile
parameters.

Change-Id: I41b0e9d93cec00b7274fa22092f340668c05a5d5
Signed-off-by: default avatarAnirudh Ghayal <aghayal@codeaurora.org>
parent 8464c490

Documentation/devicetree/bindings/power/qpnp-smbcharger.txt

+3 −0
Original line number Diff line number Diff line
@@ -252,6 +252,9 @@ Optional Properties: 
					charger current reduces beyond this threshold

					parallel charger is disabled. Must be specified

					if parallel charger is used.

- qcom,battery-data			Points to the phandle of node which

					contains the battery-profiles supported

					by the charger/FG.



Example:

	qcom,qpnp-smbcharger {

drivers/power/qpnp-smbcharger.c

+64 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <linux/rtc.h>

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

#include <linux/batterydata-lib.h>

#include <linux/of_batterydata.h>

#include <linux/msm_bcl.h>

#include <linux/ktime.h>
@@ -165,6 +166,7 @@ struct smbchg_chip { 
	bool				usb_ov_det;

	bool				otg_pulse_skip_en;

	bool				very_weak_charger;

	const char			*battery_type;



	/* jeita and temperature */

	bool				batt_hot;
@@ -3114,6 +3116,62 @@ static void smbchg_aicl_deglitch_wa_check(struct smbchg_chip *chip) 


#define UNKNOWN_BATT_TYPE	"Unknown Battery"

#define LOADING_BATT_TYPE	"Loading Battery Data"

static int smbchg_config_chg_battery_type(struct smbchg_chip *chip)

{

	int rc = 0, max_voltage_uv = 0;

	struct device_node *batt_node, *profile_node;

	struct device_node *node = chip->spmi->dev.of_node;

	union power_supply_propval prop = {0,};



	rc = chip->bms_psy->get_property(chip->bms_psy,

			POWER_SUPPLY_PROP_BATTERY_TYPE, &prop);

	if (rc) {

		pr_smb(PR_STATUS, "Unable to read battery-type rc=%d\n", rc);

		return 0;

	}

	if (!strcmp(prop.strval, UNKNOWN_BATT_TYPE) ||

		!strcmp(prop.strval, LOADING_BATT_TYPE)) {

		pr_smb(PR_MISC, "Battery-type not identified\n");

		return 0;

	}

	/* quit if there is no change in the battery-type from previous */

	if (chip->battery_type && !strcmp(prop.strval, chip->battery_type))

		return 0;



	batt_node = of_parse_phandle(node, "qcom,battery-data", 0);

	if (!batt_node) {

		pr_smb(PR_MISC, "No batterydata available\n");

		return 0;

	}



	profile_node = of_batterydata_get_best_profile(batt_node,

							"bms", NULL);

	if (!profile_node) {

		pr_err("couldn't find profile handle\n");

		return -EINVAL;

	}

	chip->battery_type = prop.strval;



	/* change vfloat */

	rc = of_property_read_u32(profile_node, "qcom,max-voltage-uv",

						&max_voltage_uv);

	if (rc) {

		pr_warn("couldn't find battery max voltage rc=%d\n", rc);

		return rc;

	}

	if (chip->vfloat_mv != (max_voltage_uv / 1000)) {

		pr_info("Vfloat changed from %dmV to %dmV for battery-type %s\n",

				chip->vfloat_mv, (max_voltage_uv / 1000),

				chip->battery_type);

		rc = smbchg_float_voltage_set(chip, (max_voltage_uv / 1000));

		if (rc < 0)

			dev_err(chip->dev,

				"Couldn't set float voltage rc = %d\n", rc);

	}



	return rc;

}



static void smbchg_external_power_changed(struct power_supply *psy)

{

	struct smbchg_chip *chip = container_of(psy,
@@ -3141,6 +3199,12 @@ static void smbchg_external_power_changed(struct power_supply *psy) 
			chip->previous_soc = soc;

			smbchg_soc_changed(chip);

		}



		rc = smbchg_config_chg_battery_type(chip);

		if (rc)

			pr_smb(PR_MISC,

				"Couldn't update charger configuration rc=%d\n",

									rc);

	}



	rc = chip->usb_psy->get_property(chip->usb_psy,