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Commit ae0ea54a authored by Nicholas Troast's avatar Nicholas Troast Committed by Harry Yang
Browse files

smb138x-charger: configure connector temp thresholds 



Add a device tree property qcom,connector-temp-max-mdegc to configure
the connector temperature at which mitigation should start.

This will set the thresholds for when the temperature-change IRQ will
fire.

Change-Id: I47df477b56a6654fbf94b5bb0f7dfdfb80e2f16e
Signed-off-by: default avatarNicholas Troast <ntroast@codeaurora.org>
parent b021dd94

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

+6 −0
Original line number Diff line number Diff line
@@ -58,6 +58,12 @@ Charger specific properties: 
  Definition: Specifies the maximum charger temperature in milli-degrees

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



- qcom,connector-temp-max-mdegc

  Usage:      optional

  Value type: <u32>

  Definition: Specifies the maximum connector temperature in milli-degrees

	      Celsius. If unspecified a default value of 105000 will be used.



- io-channels

  Usage:      optional

  Value type: List of <phandle u32>

drivers/power/supply/qcom/smb-lib.h

+3 −0
Original line number Diff line number Diff line
@@ -135,6 +135,9 @@ struct smb_iio { 
	struct iio_channel	*usbin_i_chan;

	struct iio_channel	*usbin_v_chan;

	struct iio_channel	*batt_i_chan;

	struct iio_channel	*connector_temp_thr1_chan;

	struct iio_channel	*connector_temp_thr2_chan;

	struct iio_channel	*connector_temp_thr3_chan;

};



struct reg_info {

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

+50 −0
Original line number Diff line number Diff line
@@ -93,6 +93,7 @@ struct smb_dt_props { 
	int	usb_icl_ua;

	int	dc_icl_ua;

	int	chg_temp_max_mdegc;

	int	connector_temp_max_mdegc;

};



struct smb138x {
@@ -142,6 +143,12 @@ static int smb138x_parse_dt(struct smb138x *chip) 
	if (rc < 0)

		chip->dt.chg_temp_max_mdegc = 80000;



	rc = of_property_read_u32(node,

				"qcom,connector-temp-max-mdegc",

				&chip->dt.chg_temp_max_mdegc);

	if (rc < 0)

		chip->dt.connector_temp_max_mdegc = 105000;



	return 0;

}
@@ -672,6 +679,8 @@ static int smb138x_init_vconn_regulator(struct smb138x *chip) 
 * HARDWARE INITIALIZATION *

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



#define MDEGC_3		3000

#define MDEGC_15	15000

static int smb138x_init_slave_hw(struct smb138x *chip)

{

	struct smb_charger *chg = &chip->chg;
@@ -771,6 +780,26 @@ static int smb138x_init_slave_hw(struct smb138x *chip) 
		return rc;

	}



	rc = iio_write_channel_processed(chg->iio.connector_temp_thr1_chan,

				chip->dt.connector_temp_max_mdegc);

	if (rc < 0) {

		pr_err("Couldn't set connector temp threshold1 rc=%d\n", rc);

		return rc;

	}



	rc = iio_write_channel_processed(chg->iio.connector_temp_thr2_chan,

				chip->dt.connector_temp_max_mdegc + MDEGC_3);

	if (rc < 0) {

		pr_err("Couldn't set connector temp threshold2 rc=%d\n", rc);

		return rc;

	}



	rc = iio_write_channel_processed(chg->iio.connector_temp_thr3_chan,

				chip->dt.connector_temp_max_mdegc + MDEGC_15);

	if (rc < 0) {

		pr_err("Couldn't set connector temp threshold3 rc=%d\n", rc);

		return rc;

	}

	return 0;

}
@@ -1277,6 +1306,27 @@ static int smb138x_slave_probe(struct smb138x *chip) 
		goto cleanup;

	}



	chg->iio.connector_temp_thr1_chan = iio_channel_get(chg->dev,

							"connector_temp_thr1");

	if (IS_ERR(chg->iio.connector_temp_thr1_chan)) {

		rc = PTR_ERR(chg->iio.connector_temp_thr1_chan);

		goto cleanup;

	}



	chg->iio.connector_temp_thr2_chan = iio_channel_get(chg->dev,

							"connector_temp_thr2");

	if (IS_ERR(chg->iio.connector_temp_thr2_chan)) {

		rc = PTR_ERR(chg->iio.connector_temp_thr2_chan);

		goto cleanup;

	}



	chg->iio.connector_temp_thr3_chan = iio_channel_get(chg->dev,

							"connector_temp_thr3");

	if (IS_ERR(chg->iio.connector_temp_thr3_chan)) {

		rc = PTR_ERR(chg->iio.connector_temp_thr3_chan);

		goto cleanup;

	}



	rc = smb138x_parse_dt(chip);

	if (rc < 0) {

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