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Commit 93d3dd41 authored by Anirudh Ghayal's avatar Anirudh Ghayal
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power: smb135x-charger: Add a DT property for enable-pin polarity 



Add ability to configure the polarity of enable-pin in
parallel-charger configuration.

CRs-Fixed: 978046
Change-Id: Ied82dff7afeaa58ea0815f555791c9a0d15e926a
Signed-off-by: default avatarAnirudh Ghayal <aghayal@codeaurora.org>
parent c1551685

Documentation/devicetree/bindings/power/smb135x-charger.txt

+4 −0
Original line number Diff line number Diff line
@@ -75,6 +75,10 @@ Optional Properties: 
				The possible range for fastcharge current is

				from 300mA to 3000mA.

- qcom,id-line-not-connected:	Specifies if smb135x charger is not monitoring the USB_ID line.

- qcom,parallel-en-pin-polarity Specify the polarity of enable signal controlled

				via pin in a parallel-charger configuration.

				0 - Active low and 1  - Active high.

				If not specified the default value is active-low.



Example:

	i2c@f9967000 {

drivers/power/smb135x-charger.c

+15 −3
Original line number Diff line number Diff line 
/* Copyright (c) 2013-2015 The Linux Foundation. All rights reserved.

/* Copyright (c) 2013-2016 The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -89,6 +89,7 @@ 
#define CFG_14_REG			0x14

#define CHG_EN_BY_PIN_BIT		BIT(7)

#define CHG_EN_ACTIVE_LOW_BIT		BIT(6)

#define CHG_EN_ACTIVE_HIGH_BIT		0x0

#define PRE_TO_FAST_REQ_CMD_BIT		BIT(5)

#define DISABLE_CURRENT_TERM_BIT	BIT(3)

#define DISABLE_AUTO_RECHARGE_BIT	BIT(2)
@@ -367,6 +368,7 @@ struct smb135x_chg { 
	bool				parallel_charger;

	bool				parallel_charger_present;

	bool				bms_controlled_charging;

	u32				parallel_pin_polarity_setting;



	/* psy */

	struct power_supply		*usb_psy;
@@ -1787,7 +1789,8 @@ static int smb135x_parallel_set_chg_present(struct smb135x_chg *chip, 
		rc = smb135x_masked_write(chip, CFG_14_REG,

				CHG_EN_BY_PIN_BIT | CHG_EN_ACTIVE_LOW_BIT

				| DISABLE_AUTO_RECHARGE_BIT,

				CHG_EN_BY_PIN_BIT | CHG_EN_ACTIVE_LOW_BIT);

				CHG_EN_BY_PIN_BIT |

				chip->parallel_pin_polarity_setting);



		/* set bit 0 = 100mA bit 1 = 500mA and set register control */

		rc = smb135x_masked_write(chip, CFG_E_REG,
@@ -4293,6 +4296,15 @@ static int smb135x_parallel_charger_probe(struct i2c_client *client, 
	if (rc < 0)

		chip->vfloat_mv = -EINVAL;



	rc = of_property_read_u32(node, "qcom,parallel-en-pin-polarity",

					&chip->parallel_pin_polarity_setting);

	if (rc)

		chip->parallel_pin_polarity_setting = CHG_EN_ACTIVE_LOW_BIT;

	else

		chip->parallel_pin_polarity_setting =

				chip->parallel_pin_polarity_setting ?

				CHG_EN_ACTIVE_HIGH_BIT : CHG_EN_ACTIVE_LOW_BIT;



	mutex_init(&chip->path_suspend_lock);

	mutex_init(&chip->current_change_lock);

	mutex_init(&chip->read_write_lock);