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Commit 2e6b1e59 authored by Fenglin Wu's avatar Fenglin Wu Committed by Gerrit - the friendly Code Review server
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power: smb1360: Add a DT property to configure recharge SOC threshold 



Add a device tree property to configure the auto-recharge SOC threshold.
This implements a SOC based resume charging strategy, device will
recharge after system SOC drops to the configured threshold.

Change-Id: I4165c119269e131cce66a1fb9d09908f13bb47f4
Signed-off-by: default avatarFenglin Wu <fenglinw@codeaurora.org>
parent 012018f2

Documentation/devicetree/bindings/power/smb1360-charger-fg.txt

+2 −0
Original line number Diff line number Diff line
@@ -100,6 +100,7 @@ Optional Properties: 
- qcom,otg-batt-curr-limit	This property defines the current threshold draw

				from battery when device working at OTG mode.

				The possible values are: 350, 550, 950, 1500mA.

- qcom,fg-auto-recharge-soc	This property defines the auto recharging SOC threshold.



Example:

	i2c@f9967000 {
@@ -135,6 +136,7 @@ Example: 
			qcom,recharge-thresh-mv = <100>;

			qcom,fg-soc-max = <85>;

			qcom,fg-soc-min = <15>;

			qcom,fg-auto-recharge-soc = <99>;

			qcom,thermal-mitigation = <1500 700 300 0>;



			qcom,otg-batt-curr-limit = <950>;

drivers/power/smb1360-charger-fg.c

+36 −1
Original line number Diff line number Diff line
@@ -64,6 +64,9 @@ 
#define CFG_AUTO_RECHG_DIS_BIT		BIT(2)

#define CFG_CHG_INHIBIT_EN_BIT		BIT(0)



#define CFG_CHG_FUNC_CTRL_REG		0x08

#define CHG_RECHG_THRESH_FG_SRC_BIT	BIT(1)



#define CFG_STAT_CTRL_REG		0x09

#define CHG_STAT_IRQ_ONLY_BIT		BIT(4)

#define CHG_TEMP_CHG_ERR_BLINK_BIT	BIT(3)
@@ -202,6 +205,7 @@ 
#define CC_TO_SOC_COEFF			0xBA

#define NOMINAL_CAPACITY_REG		0xBC

#define ACTUAL_CAPACITY_REG		0xBE

#define FG_AUTO_RECHARGE_SOC		0xD2

#define FG_SYS_CUTOFF_V_REG		0xD3

#define FG_CC_TO_CV_V_REG		0xD5

#define FG_ITERM_REG			0xD9
@@ -288,6 +292,7 @@ struct smb1360_chip { 
	int				fg_ibatt_standby_ma;

	int				fg_thermistor_c1_coeff;

	int				fg_cc_to_cv_mv;

	int				fg_auto_recharge_soc;



	/* status tracking */

	bool				usb_present;
@@ -2533,7 +2538,8 @@ static int smb1360_fg_config(struct smb1360_chip *chip) 
		|| chip->fg_iterm_ma != -EINVAL

		|| chip->fg_ibatt_standby_ma != -EINVAL

		|| chip->fg_thermistor_c1_coeff != -EINVAL

		|| chip->fg_cc_to_cv_mv != -EINVAL) {

		|| chip->fg_cc_to_cv_mv != -EINVAL

		|| chip->fg_auto_recharge_soc != -EINVAL) {



		rc = smb1360_enable_fg_access(chip);

		if (rc) {
@@ -2663,6 +2669,30 @@ static int smb1360_fg_config(struct smb1360_chip *chip) 
				goto disable_fg;

			}

		}



		/* Update SoC based resume charging threshold */

		if (chip->fg_auto_recharge_soc != -EINVAL) {

			rc = smb1360_masked_write(chip, CFG_CHG_FUNC_CTRL_REG,

						CHG_RECHG_THRESH_FG_SRC_BIT,

						CHG_RECHG_THRESH_FG_SRC_BIT);

			if (rc) {

				dev_err(chip->dev, "Couldn't write to CFG_CHG_FUNC_CTRL_REG rc=%d\n",

									rc);

				goto disable_fg;

			}



			reg = DIV_ROUND_UP(chip->fg_auto_recharge_soc *

							MAX_8_BITS, 100);

			pr_debug("fg_auto_recharge_soc=%d reg=%x\n",

					chip->fg_auto_recharge_soc, reg);

			rc = smb1360_write(chip, FG_AUTO_RECHARGE_SOC, reg);

			if (rc) {

				dev_err(chip->dev, "Couldn't write to FG_AUTO_RECHARGE_SOC rc=%d\n",

									rc);

				goto disable_fg;

			}

		}



disable_fg:

		/* disable FG access */

		smb1360_disable_fg_access(chip);
@@ -3248,6 +3278,11 @@ static int smb_parse_dt(struct smb1360_chip *chip) 
	if (rc < 0)

		chip->otg_batt_curr_limit = -EINVAL;



	rc = of_property_read_u32(node, "qcom,fg-auto-recharge-soc",

					&chip->fg_auto_recharge_soc);

	if (rc < 0)

		chip->fg_auto_recharge_soc = -EINVAL;



	return 0;

}