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power: qpnp-fg-gen3: optimize TTF for QNOVO

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QNOVO provides a table of expected charge current settings across the
charge cycle. Use this table to calculate the time it will take to
charge in each step. The sum of these steps is the total time it will
take to fully charge a battery.

Change-Id: I0ed48a2a63886531e761e7ce1d175a600060eaf8
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
This commit is contained in:
Nicholas Troast 2017-06-21 11:10:40 -07:00
parent e55198f9ef
commit 811a8bd2ef
2 changed files with 45 additions and 1 deletions
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1
drivers/power/supply/qcom/fg-core.h
View file

@ -233,6 +233,7 @@ enum esr_timer_config {
enum ttf_mode {
TTF_MODE_NORMAL = 0,
TTF_MODE_QNOVO,
};
/* DT parameters for FG device */

45
drivers/power/supply/qcom/qpnp-fg-gen3.c
View file

@ -2822,7 +2822,9 @@ module_param_cb(restart, &fg_restart_ops, &fg_restart, 0644);
static int fg_get_time_to_full_locked(struct fg_chip *chip, int *val)
{
int rc, ibatt_avg, vbatt_avg, rbatt, msoc, full_soc, act_cap_mah,
i_cc2cv, soc_cc2cv, tau, divisor, iterm,
i_cc2cv, soc_cc2cv, tau, divisor, iterm, ttf_mode,
i, soc_per_step, msoc_this_step, msoc_next_step,
ibatt_this_step, t_predicted_this_step,
t_predicted_cv, t_predicted = 0;
if (chip->bp.float_volt_uv <= 0) {
@ -2848,6 +2850,18 @@ static int fg_get_time_to_full_locked(struct fg_chip *chip, int *val)
return 0;
}
if (is_qnovo_en(chip))
ttf_mode = TTF_MODE_QNOVO;
else
ttf_mode = TTF_MODE_NORMAL;
/* when switching TTF algorithms the TTF needs to be reset */
if (chip->ttf.mode != ttf_mode) {
fg_circ_buf_clr(&chip->ttf.ibatt);
fg_circ_buf_clr(&chip->ttf.vbatt);
chip->ttf.mode = ttf_mode;
}
/* at least 10 samples are required to produce a stable IBATT */
if (chip->ttf.ibatt.size < 10) {
*val = -1;
@ -2907,6 +2921,12 @@ static int fg_get_time_to_full_locked(struct fg_chip *chip, int *val)
i_cc2cv = ibatt_avg * vbatt_avg /
max(MILLI_UNIT, chip->bp.float_volt_uv / MILLI_UNIT);
break;
case TTF_MODE_QNOVO:
i_cc2cv = min(
chip->ttf.cc_step.arr[MAX_CC_STEPS - 1] / MILLI_UNIT,
ibatt_avg * vbatt_avg /
max(MILLI_UNIT, chip->bp.float_volt_uv / MILLI_UNIT));
break;
default:
pr_err("TTF mode %d is not supported\n", chip->ttf.mode);
break;
@ -2931,6 +2951,29 @@ static int fg_get_time_to_full_locked(struct fg_chip *chip, int *val)
t_predicted = div_s64((s64)act_cap_mah * (soc_cc2cv - msoc) *
HOURS_TO_SECONDS, divisor);
break;
case TTF_MODE_QNOVO:
soc_per_step = 100 / MAX_CC_STEPS;
for (i = msoc / soc_per_step; i < MAX_CC_STEPS - 1; ++i) {
msoc_next_step = (i + 1) * soc_per_step;
if (i == msoc / soc_per_step)
msoc_this_step = msoc;
else
msoc_this_step = i * soc_per_step;
/* scale ibatt by 85% to account for discharge pulses */
ibatt_this_step = min(
chip->ttf.cc_step.arr[i] / MILLI_UNIT,
ibatt_avg) * 85 / 100;
divisor = max(100, ibatt_this_step * 100);
t_predicted_this_step = div_s64((s64)act_cap_mah *
(msoc_next_step - msoc_this_step) *
HOURS_TO_SECONDS, divisor);
t_predicted += t_predicted_this_step;
fg_dbg(chip, FG_TTF, "[%d, %d] ma=%d t=%d\n",
msoc_this_step, msoc_next_step,
ibatt_this_step, t_predicted_this_step);
}
break;
default:
pr_err("TTF mode %d is not supported\n", chip->ttf.mode);
break;