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Commit dc6e59ad authored by Nicholas Troast's avatar Nicholas Troast Committed by Harry Yang
Browse files

smb138x-charger: configure charger temperature threshold 



The charger temperature threshold should be configured for thermal
balancing. Add a device tree property to configure the temperature
threshold. A default value will be used in the absence of this property.

Change-Id: I5d64a8012a9c13c578714d91f1e7e4426cef235a
Signed-off-by: default avatarNicholas Troast <ntroast@codeaurora.org>
parent ef82581a

Documentation/devicetree/bindings/power/supply/qcom/smb138x-charger.txt

+6 −0
Original line number Diff line number Diff line
@@ -52,6 +52,12 @@ Charger specific properties: 
  Value type: <u32>

  Definition: Specifies the DC input current limit in micro-amps.



- qcom,charger-temp-max-mdegc

  Usage:      optional

  Value type: <u32>

  Definition: Specifies the maximum charger temperature in milli-degrees

	      Celsius. If unspecified a default of 80000 will be used.



- io-channels

  Usage:      optional

  Value type: List of <phandle u32>

drivers/power/supply/qcom/smb138x-charger.c

+140 −95
Original line number Diff line number Diff line
@@ -10,18 +10,21 @@ 
 * GNU General Public License for more details.

 */



#define pr_fmt(fmt) "SMB138X: %s: " fmt, __func__



#include <linux/device.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/power_supply.h>

#include <linux/iio/consumer.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/of_irq.h>

#include <linux/platform_device.h>

#include <linux/power_supply.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/qpnp/qpnp-revid.h>

#include "smb-reg.h"

#include "smb-lib.h"
@@ -89,6 +92,7 @@ struct smb_dt_props { 
	int	fcc_ua;

	int	usb_icl_ua;

	int	dc_icl_ua;

	int	chg_temp_max_mdegc;

};



struct smb138x {
@@ -132,6 +136,12 @@ static int smb138x_parse_dt(struct smb138x *chip) 
	if (rc < 0)

		chip->dt.dc_icl_ua = SMB138X_DEFAULT_ICL_UA;



	rc = of_property_read_u32(node,

				"qcom,charger-temp-max-mdegc",

				&chip->dt.chg_temp_max_mdegc);

	if (rc < 0)

		chip->dt.chg_temp_max_mdegc = 80000;



	return 0;

}
@@ -658,6 +668,108 @@ static int smb138x_init_vconn_regulator(struct smb138x *chip) 
 * HARDWARE INITIALIZATION *

 ***************************/



static int smb138x_init_slave_hw(struct smb138x *chip)

{

	struct smb_charger *chg = &chip->chg;

	int rc;



	if (chip->wa_flags & OOB_COMP_WA_BIT) {

		rc = smblib_masked_write(chg, SMB2CHG_MISC_ENG_SDCDC_CFG2,

					ENG_SDCDC_SEL_OOB_VTH_BIT,

					ENG_SDCDC_SEL_OOB_VTH_BIT);

		if (rc < 0) {

			pr_err("Couldn't configure the OOB comp threshold rc = %d\n",

									rc);

			return rc;

		}



		rc = smblib_masked_write(chg, SMB2CHG_MISC_ENG_SDCDC_CFG6,

				DEAD_TIME_MASK, HIGH_DEAD_TIME_MASK);

		if (rc < 0) {

			pr_err("Couldn't configure the sdcdc cfg 6 reg rc = %d\n",

									rc);

			return rc;

		}

	}



	/* enable watchdog bark and bite interrupts, and disable the watchdog */

	rc = smblib_masked_write(chg, WD_CFG_REG, WDOG_TIMER_EN_BIT

			| WDOG_TIMER_EN_ON_PLUGIN_BIT | BITE_WDOG_INT_EN_BIT

			| BARK_WDOG_INT_EN_BIT,

			BITE_WDOG_INT_EN_BIT | BARK_WDOG_INT_EN_BIT);

	if (rc < 0) {

		pr_err("Couldn't configure the watchdog rc=%d\n", rc);

		return rc;

	}



	/* disable charging when watchdog bites */

	rc = smblib_masked_write(chg, SNARL_BARK_BITE_WD_CFG_REG,

				 BITE_WDOG_DISABLE_CHARGING_CFG_BIT,

				 BITE_WDOG_DISABLE_CHARGING_CFG_BIT);

	if (rc < 0) {

		pr_err("Couldn't configure the watchdog bite rc=%d\n", rc);

		return rc;

	}



	/* suspend parallel charging */

	rc = smb138x_set_parallel_suspend(chip, true);

	if (rc < 0) {

		pr_err("Couldn't suspend parallel charging rc=%d\n", rc);

		return rc;

	}



	/* initialize FCC to 0 */

	rc = smblib_set_charge_param(chg, &chg->param.fcc, 0);

	if (rc < 0) {

		pr_err("Couldn't set 0 FCC rc=%d\n", rc);

		return rc;

	}



	/* enable the charging path */

	rc = smblib_masked_write(chg, CHARGING_ENABLE_CMD_REG,

				 CHARGING_ENABLE_CMD_BIT,

				 CHARGING_ENABLE_CMD_BIT);

	if (rc < 0) {

		pr_err("Couldn't enable charging rc=%d\n", rc);

		return rc;

	}



	/* configure charge enable for software control; active high */

	rc = smblib_masked_write(chg, CHGR_CFG2_REG,

				 CHG_EN_POLARITY_BIT | CHG_EN_SRC_BIT, 0);

	if (rc < 0) {

		pr_err("Couldn't configure charge enable source rc=%d\n",

			rc);

		return rc;

	}



	/* enable parallel current sensing */

	rc = smblib_masked_write(chg, CFG_REG,

				 VCHG_EN_CFG_BIT, VCHG_EN_CFG_BIT);

	if (rc < 0) {

		pr_err("Couldn't enable parallel current sensing rc=%d\n",

			rc);

		return rc;

	}



	/* enable stacked diode */

	rc = smblib_write(chg, SMB2CHG_DC_TM_SREFGEN, STACKED_DIODE_EN_BIT);

	if (rc < 0) {

		pr_err("Couldn't enable stacked diode rc=%d\n", rc);

		return rc;

	}



	/* initialize charger temperature threshold */

	rc = iio_write_channel_processed(chg->iio.temp_max_chan,

					chip->dt.chg_temp_max_mdegc);

	if (rc < 0) {

		pr_err("Couldn't set charger temp threshold rc=%d\n", rc);

		return rc;

	}



	return 0;

}



static int smb138x_init_hw(struct smb138x *chip)

{

	struct smb_charger *chg = &chip->chg;
@@ -681,15 +793,14 @@ static int smb138x_init_hw(struct smb138x *chip) 
	rc = smblib_masked_write(chg, CHGR_CFG2_REG,

				 CHG_EN_POLARITY_BIT | CHG_EN_SRC_BIT, 0);

	if (rc < 0) {

		dev_err(chg->dev,

			"Couldn't configure charge enable source rc=%d\n", rc);

		pr_err("Couldn't configure charge enable source rc=%d\n", rc);

		return rc;

	}



	/* enable the charging path */

	rc = vote(chg->chg_disable_votable, DEFAULT_VOTER, false, 0);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't enable charging rc=%d\n", rc);

		pr_err("Couldn't enable charging rc=%d\n", rc);

		return rc;

	}
@@ -701,8 +812,7 @@ static int smb138x_init_hw(struct smb138x *chip) 
			    TYPEC_CCSTATE_CHANGE_INT_EN_BIT

			  | TYPEC_VBUS_ERROR_INT_EN_BIT);

	if (rc < 0) {

		dev_err(chg->dev,

			"Couldn't configure Type-C interrupts rc=%d\n", rc);

		pr_err("Couldn't configure Type-C interrupts rc=%d\n", rc);

		return rc;

	}
@@ -711,16 +821,14 @@ static int smb138x_init_hw(struct smb138x *chip) 
				 VCONN_EN_SRC_BIT | VCONN_EN_VALUE_BIT,

				 VCONN_EN_SRC_BIT);

	if (rc < 0) {

		dev_err(chg->dev,

			"Couldn't configure VCONN for SW control rc=%d\n", rc);

		pr_err("Couldn't configure VCONN for SW control rc=%d\n", rc);

		return rc;

	}



	/* configure VBUS for software control */

	rc = smblib_masked_write(chg, OTG_CFG_REG, OTG_EN_SRC_CFG_BIT, 0);

	if (rc < 0) {

		dev_err(chg->dev,

			"Couldn't configure VBUS for SW control rc=%d\n", rc);

		pr_err("Couldn't configure VBUS for SW control rc=%d\n", rc);

		return rc;

	}
@@ -728,8 +836,7 @@ static int smb138x_init_hw(struct smb138x *chip) 
	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,

				 TYPEC_POWER_ROLE_CMD_MASK, 0);

	if (rc < 0) {

		dev_err(chg->dev,

			"Couldn't configure power role for DRP rc=%d\n", rc);

		pr_err("Couldn't configure power role for DRP rc=%d\n", rc);

		return rc;

	}
@@ -738,16 +845,16 @@ static int smb138x_init_hw(struct smb138x *chip) 
					ENG_SDCDC_SEL_OOB_VTH_BIT,

					ENG_SDCDC_SEL_OOB_VTH_BIT);

		if (rc < 0) {

			dev_err(chg->dev,

			"Couldn't configure the oob comp threh rc = %d\n", rc);

			pr_err("Couldn't configure the OOB comp threshold rc = %d\n",

									rc);

			return rc;

		}



		rc = smblib_masked_write(chg, SMB2CHG_MISC_ENG_SDCDC_CFG6,

				DEAD_TIME_MASK, HIGH_DEAD_TIME_MASK);

		if (rc < 0) {

			dev_err(chg->dev,

			"Couldn't configure the sdcdc cfg 6 reg rc = %d\n", rc);

			pr_err("Couldn't configure the sdcdc cfg 6 reg rc = %d\n",

									rc);

			return rc;

		}

	}
@@ -1144,92 +1251,24 @@ static int smb138x_slave_probe(struct smb138x *chip) 
		goto cleanup;

	}



	if (chip->wa_flags & OOB_COMP_WA_BIT) {

		rc = smblib_masked_write(chg, SMB2CHG_MISC_ENG_SDCDC_CFG2,

					ENG_SDCDC_SEL_OOB_VTH_BIT,

					ENG_SDCDC_SEL_OOB_VTH_BIT);

		if (rc < 0) {

			dev_err(chg->dev,

			"Couldn't configure the oob comp threh rc = %d\n", rc);

			goto cleanup;

		}



		rc = smblib_masked_write(chg, SMB2CHG_MISC_ENG_SDCDC_CFG6,

				DEAD_TIME_MASK, HIGH_DEAD_TIME_MASK);

		if (rc < 0) {

			dev_err(chg->dev,

			"Couldn't configure the sdcdc cfg 6 reg rc = %d\n", rc);

			goto cleanup;

		}

	}



	/* enable watchdog bark and bite interrupts, and disable the watchdog */

	rc = smblib_masked_write(chg, WD_CFG_REG, WDOG_TIMER_EN_BIT

			| WDOG_TIMER_EN_ON_PLUGIN_BIT | BITE_WDOG_INT_EN_BIT

			| BARK_WDOG_INT_EN_BIT,

			BITE_WDOG_INT_EN_BIT | BARK_WDOG_INT_EN_BIT);

	if (rc < 0) {

		pr_err("Couldn't configure the watchdog rc=%d\n", rc);

		goto cleanup;

	}



	/* disable charging when watchdog bites */

	rc = smblib_masked_write(chg, SNARL_BARK_BITE_WD_CFG_REG,

				 BITE_WDOG_DISABLE_CHARGING_CFG_BIT,

				 BITE_WDOG_DISABLE_CHARGING_CFG_BIT);

	if (rc < 0) {

		pr_err("Couldn't configure the watchdog bite rc=%d\n", rc);

		goto cleanup;

	}



	/* suspend parallel charging */

	rc = smb138x_set_parallel_suspend(chip, true);

	if (rc < 0) {

		pr_err("Couldn't suspend parallel charging rc=%d\n", rc);

		goto cleanup;

	}



	/* initialize FCC to 0 */

	rc = smblib_set_charge_param(chg, &chg->param.fcc, 0);

	if (rc < 0) {

		pr_err("Couldn't set 0 FCC rc=%d\n", rc);

		goto cleanup;

	}



	/* enable the charging path */

	rc = smblib_masked_write(chg, CHARGING_ENABLE_CMD_REG,

				 CHARGING_ENABLE_CMD_BIT,

				 CHARGING_ENABLE_CMD_BIT);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't enable charging rc=%d\n", rc);

	chg->iio.temp_max_chan = iio_channel_get(chg->dev, "charger_temp_max");

	if (IS_ERR(chg->iio.temp_max_chan)) {

		rc = PTR_ERR(chg->iio.temp_max_chan);

		goto cleanup;

	}



	/* configure charge enable for software control; active high */

	rc = smblib_masked_write(chg, CHGR_CFG2_REG,

				 CHG_EN_POLARITY_BIT | CHG_EN_SRC_BIT, 0);

	rc = smb138x_parse_dt(chip);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't configure charge enable source rc=%d\n",

			rc);

		pr_err("Couldn't parse device tree rc=%d\n", rc);

		goto cleanup;

	}



	/* enable parallel current sensing */

	rc = smblib_masked_write(chg, CFG_REG,

				 VCHG_EN_CFG_BIT, VCHG_EN_CFG_BIT);

	rc = smb138x_init_slave_hw(chip);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't enable parallel current sensing rc=%d\n",

			rc);

		pr_err("Couldn't initialize hardware rc=%d\n", rc);

		goto cleanup;

	}



	/* enable stacked diode */

	rc = smblib_write(chg, SMB2CHG_DC_TM_SREFGEN, STACKED_DIODE_EN_BIT);

	if (rc < 0) {

		pr_err("Couldn't enable stacked diode rc=%d\n", rc);

		return rc;

	}



	rc = smb138x_init_parallel_psy(chip);

	if (rc < 0) {

		pr_err("Couldn't initialize parallel psy rc=%d\n", rc);
@@ -1312,6 +1351,12 @@ static int smb138x_probe(struct platform_device *pdev) 
		goto cleanup;

	}



	if (rc < 0) {

		if (rc != -EPROBE_DEFER)

			pr_err("Couldn't probe SMB138X rc=%d\n", rc);

		goto cleanup;

	}



	pr_info("SMB138X probed successfully mode=%d\n", chip->chg.mode);

	return rc;