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Commit 8ce676ad authored by Hui Liu's avatar Hui Liu
Browse files

power: qcom: qbg: update OCV boost compensation into SDAM 



Add boost headroom compensation on valid OCV value
and set it into SDAM to enable charger-boost to
operate optimally.

Change-Id: Iae66525b6899368061baeb50530c9c61488b5e2c
Signed-off-by: default avatarHui Liu <huliu@codeaurora.org>
parent 07852f68

drivers/power/supply/qcom/qbg-sdam.h

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#define QBG_SDAM_FIFO_COUNT_OFFSET		0x46

#define QBG_ESSENTIAL_PARAMS_START_OFFSET	0x47

#define QBG_SDAM_START_OFFSET			0x4b

#define QBG_SDAM_BHARGER_OCV_HDRM_OFFSET	0x5b

#define QBG_SDAM_INT_TEST1			0xe0

#define QBG_SDAM_INT_TEST_VAL			0xe1

#define QBG_SDAM_DATA_PUSH_COUNTER_OFFSET	0x46

drivers/power/supply/qcom/qti-qbg.c

+40 −1
Original line number Diff line number Diff line
@@ -81,6 +81,11 @@ 
#define TBAT_LSB					7500

#define TBAT_DENOMINATOR				115600



#define BOOST_COMPENSATION_UV				400000

#define OCV_BOOST_MIN_UV				4100000

#define OCV_BOOST_MAX_UV				5600000

#define OCV_BOOST_STEP_UV				100000



enum qbg_data_tag {

	QBG_DATA_TAG_FAST_CHAR,

};
@@ -223,6 +228,30 @@ static int qbg_get_fifo_count(struct qti_qbg *chip, u32 *fifo_count) 
	return rc;

}



static void update_ocv_for_boost(struct qti_qbg *chip)

{

	int ocv_for_boost = 0x00;



	/*

	 * Every time when OCV gets updated, add 0.4V headroom compensation

	 * and round it to a value between 4.1V to 5.6V, then map it to a

	 * setting between [0x00 - 0x0F] and set it in SDAM to notify charger-boost.

	 */

	ocv_for_boost = chip->ocv_uv + BOOST_COMPENSATION_UV;

	if (ocv_for_boost < OCV_BOOST_MIN_UV)

		ocv_for_boost = OCV_BOOST_MIN_UV;

	else if (ocv_for_boost > OCV_BOOST_MAX_UV)

		ocv_for_boost = OCV_BOOST_MAX_UV;



	ocv_for_boost -= OCV_BOOST_MIN_UV;

	ocv_for_boost /= OCV_BOOST_STEP_UV;



	qbg_dbg(chip, QBG_DEBUG_STATUS, "Boost OCV value written =%d\n", ocv_for_boost);

	qbg_sdam_write(chip,

		QBG_SDAM_DATA_START_OFFSET(chip, SDAM_CTRL0) + QBG_SDAM_BHARGER_OCV_HDRM_OFFSET,

		(u8 *)&ocv_for_boost, 1);

}



static void process_udata_work(struct work_struct *work)

{

	struct qti_qbg *chip = container_of(work, struct qti_qbg, udata_work);
@@ -252,8 +281,10 @@ static void process_udata_work(struct work_struct *work) 
			power_supply_changed(chip->qbg_psy);

	}



	if (chip->udata.param[QBG_PARAM_OCV_UV].valid)

	if (chip->udata.param[QBG_PARAM_OCV_UV].valid) {

		chip->ocv_uv = chip->udata.param[QBG_PARAM_OCV_UV].data;

		update_ocv_for_boost(chip);

	}



	if (chip->udata.param[QBG_PARAM_CHARGE_CYCLE_COUNT].valid)

		chip->charge_cycle_count =
@@ -881,6 +912,7 @@ static int get_batt_id_ohm(struct qti_qbg *chip, u32 *batt_id_ohm) 
static int qbg_setup_battery(struct qti_qbg *chip)

{

	int rc = 0;

	u8 ocv_boost_val = 0x02;



	chip->profile_loaded = false;
@@ -899,6 +931,13 @@ static int qbg_setup_battery(struct qti_qbg *chip) 
			else

				chip->profile_loaded = true;

		}



		/* Update OCV boost headroom compensation value to 4.3V in debug battery case */

		if (is_debug_batt_id(chip)) {

			rc = qbg_sdam_write(chip,

				QBG_SDAM_DATA_START_OFFSET(chip, SDAM_CTRL0) +

				QBG_SDAM_BHARGER_OCV_HDRM_OFFSET, &ocv_boost_val, 1);

		}

	}



	qbg_dbg(chip, QBG_DEBUG_PROFILE, "battery_missing=%s batt_id=%d Ohm profile_loaded=%d battery_type=%s\n",