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power: qpnp-fg-gen3: add support to configure batt_therm coefficients

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Add support to configure battery thermal coefficients so that different
battery thermistors can be supported. These coefficients can be
configured via "qcom,battery-thermal-coefficients" device tree property.

CRs-Fixed: 2004461
Change-Id: Iff25acd397a68c31057dff4db1896d46e396adc6
Signed-off-by: Yingwei Zhao <cyizhao@codeaurora.org>
This commit is contained in:
cyizhao 2017-01-24 17:08:55 +08:00
parent 6825d0dd4f
commit b8b4a1bfa6
3 changed files with 37 additions and 0 deletions
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7
Documentation/devicetree/bindings/power/supply/qcom/qpnp-fg-gen3.txt
View file

@ -215,6 +215,12 @@ First Level Node - FG Gen3 device
capacity learning cycle. If this is not specified, then
the default value is 0. Unit is in decipercentage.
- qcom,battery-thermal-coefficients
Usage: optional
Value type: <u8>
Definition: Byte array of battery thermal coefficients.
This should be exactly 3 bytes in length.
- qcom,fg-jeita-hyst-temp
Usage: optional
Value type: <u32>
@ -377,6 +383,7 @@ pmi8998_fg: qpnp,fg {
qcom,ki-coeff-hi-dischg = <1200 1500 2100>;
qcom,slope-limit-temp-threshold = <100>;
qcom,slope-limit-coeffs = <10 11 12 13>;
qcom,battery-thermal-coefficients = [9d 50 ff];
status = "okay";
qcom,fg-batt-soc@4000 {

3
drivers/power/supply/qcom/fg-core.h
View file

@ -73,6 +73,8 @@
#define SLOPE_LIMIT_COEFF_MAX 31
#define BATT_THERM_NUM_COEFFS 3
/* Debug flag definitions */
enum fg_debug_flag {
FG_IRQ = BIT(0), /* Show interrupts */
@ -251,6 +253,7 @@ struct fg_dt_props {
int ki_coeff_med_dischg[KI_COEFF_SOC_LEVELS];
int ki_coeff_hi_dischg[KI_COEFF_SOC_LEVELS];
int slope_limit_coeffs[SLOPE_LIMIT_NUM_COEFFS];
u8 batt_therm_coeffs[BATT_THERM_NUM_COEFFS];
};
/* parameters from battery profile */

27
drivers/power/supply/qcom/qpnp-fg-gen3.c
View file

@ -3035,6 +3035,21 @@ static int fg_hw_init(struct fg_chip *chip)
}
}
/*
* configure battery thermal coefficients c1,c2,c3
* if its value is not zero.
*/
if (chip->dt.batt_therm_coeffs[0] > 0) {
rc = fg_write(chip, BATT_INFO_THERM_C1(chip),
chip->dt.batt_therm_coeffs, BATT_THERM_NUM_COEFFS);
if (rc < 0) {
pr_err("Error in writing battery thermal coefficients, rc=%d\n",
rc);
return rc;
}
}
if (chip->dt.recharge_soc_thr > 0 && chip->dt.recharge_soc_thr < 100) {
rc = fg_set_recharge_soc(chip, chip->dt.recharge_soc_thr);
if (rc < 0) {
@ -3807,6 +3822,18 @@ static int fg_parse_dt(struct fg_chip *chip)
rc);
}
if (of_property_count_elems_of_size(node,
"qcom,battery-thermal-coefficients",
sizeof(u8)) == BATT_THERM_NUM_COEFFS) {
rc = of_property_read_u8_array(node,
"qcom,battery-thermal-coefficients",
chip->dt.batt_therm_coeffs,
BATT_THERM_NUM_COEFFS);
if (rc < 0)
pr_warn("Error reading battery thermal coefficients, rc:%d\n",
rc);
}
rc = of_property_read_u32(node, "qcom,fg-esr-timer-charging", &temp);
if (rc < 0)
chip->dt.esr_timer_charging = -EINVAL;