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Commit eff5986c authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
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power: qpnp-fg-gen4: add support to show high resolution of MSOC 



Currently CAPACITY_RAW property shows the monotonic SOC read
from FG_BATT_SOC peripheral which is in the scale of 0-255. For
showing a higher resolution of monotonic SOC to the user, obtain
it from FG SRAM which is in the scale of 0-65535 and show it in
centi-percentage when "qcom,soc-hi-res" property is specified.
When the charger is removed, show CAPACITY_RAW simply as
CAPACITY multiplied by 100.

Change-Id: I01b81be1d0ad9020bb6f5d33afe1401dde289a12
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 425616e8

Documentation/devicetree/bindings/power/supply/qcom/qpnp-fg-gen4.txt

+7 −0
Original line number Diff line number Diff line
@@ -419,6 +419,13 @@ First Level Node - FG Gen4 device 
		    multiple battery profiles to be specified for a battery for

		    proper functionality.



- qcom,soc-hi-res

	Usage:      optional

	Value type: <empty>

	Definition: A boolean property that when specified shows high

		    resolution of monotonic SOC under CAPACITY_RAW property

		    during charging in the scale of 0-10000.



==========================================================

Second Level Nodes - Peripherals managed by FG Gen4 driver

==========================================================

drivers/power/supply/qcom/qpnp-fg-gen4.c

+32 −1
Original line number Diff line number Diff line
@@ -195,6 +195,7 @@ struct fg_dt_props { 
	bool	five_pin_battery;

	bool	multi_profile_load;

	bool	esr_calib_dischg;

	bool	soc_hi_res;

	int	cutoff_volt_mv;

	int	empty_volt_mv;

	int	cutoff_curr_ma;
@@ -829,6 +830,35 @@ static int fg_gen4_get_prop_capacity(struct fg_dev *fg, int *val) 
	return 0;

}



static int fg_gen4_get_prop_capacity_raw(struct fg_gen4_chip *chip, int *val)

{

	struct fg_dev *fg = &chip->fg;

	int rc;



	if (!chip->dt.soc_hi_res) {

		rc = fg_get_msoc_raw(fg, val);

		return rc;

	}



	if (!is_input_present(fg)) {

		rc = fg_gen4_get_prop_capacity(fg, val);

		if (!rc)

			*val = *val * 100;

		return rc;

	}



	rc = fg_get_sram_prop(&chip->fg, FG_SRAM_MONOTONIC_SOC, val);

	if (rc < 0) {

		pr_err("Error in getting MONOTONIC_SOC, rc=%d\n", rc);

		return rc;

	}



	/* Show it in centi-percentage */

	*val = (*val * 10000) / 0xFFFF;



	return 0;

}



static inline void get_esr_meas_current(int curr_ma, u8 *val)

{

	switch (curr_ma) {
@@ -3484,7 +3514,7 @@ static int fg_psy_get_property(struct power_supply *psy, 
		rc = fg_gen4_get_prop_capacity(fg, &pval->intval);

		break;

	case POWER_SUPPLY_PROP_CAPACITY_RAW:

		rc = fg_get_msoc_raw(fg, &pval->intval);

		rc = fg_gen4_get_prop_capacity_raw(chip, &pval->intval);

		break;

	case POWER_SUPPLY_PROP_CC_SOC:

		rc = fg_get_sram_prop(&chip->fg, FG_SRAM_CC_SOC, &val);
@@ -4859,6 +4889,7 @@ static int fg_gen4_parse_dt(struct fg_gen4_chip *chip) 
					"qcom,five-pin-battery");

	chip->dt.multi_profile_load = of_property_read_bool(node,

					"qcom,multi-profile-load");

	chip->dt.soc_hi_res = of_property_read_bool(node, "qcom,soc-hi-res");

	return 0;

}