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Commit eee1d077 authored by Stephen Boyd's avatar Stephen Boyd Committed by Sebastian Reichel
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power: qcom_smbb: Make an extcon for usb cable detection 



On these PMICs the usb cable connection/disconnection is
indicated by the usb-valid interrupt being high or low
respectively. Let's make an extcon for that, so we can notify usb
drivers of the cable state.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarStephen Boyd <stephen.boyd@linaro.org>
Reviewed-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent c5ed3307

drivers/power/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -393,6 +393,7 @@ config CHARGER_QCOM_SMBB 
	tristate "Qualcomm Switch-Mode Battery Charger and Boost"

	depends on MFD_SPMI_PMIC || COMPILE_TEST

	depends on OF

	depends on EXTCON

	help

	  Say Y to include support for the Switch-Mode Battery Charger and

	  Boost (SMBB) hardware found in Qualcomm PM8941 PMICs.  The charger

drivers/power/qcom_smbb.c

+21 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <linux/power_supply.h>

#include <linux/regmap.h>

#include <linux/slab.h>

#include <linux/extcon.h>



#define SMBB_CHG_VMAX		0x040

#define SMBB_CHG_VSAFE		0x041
@@ -111,6 +112,7 @@ struct smbb_charger { 
	unsigned int revision;

	unsigned int addr;

	struct device *dev;

	struct extcon_dev *edev;



	bool dc_disabled;

	bool jeita_ext_temp;
@@ -125,6 +127,11 @@ struct smbb_charger { 
	struct regmap *regmap;

};



static const unsigned int smbb_usb_extcon_cable[] = {

	EXTCON_USB,

	EXTCON_NONE,

};



static int smbb_vbat_weak_fn(unsigned int index)

{

	return 2100000 + index * 100000;
@@ -371,6 +378,8 @@ static irqreturn_t smbb_usb_valid_handler(int irq, void *_data) 
	struct smbb_charger *chg = _data;



	smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);

	extcon_set_cable_state_(chg->edev, EXTCON_USB,

				chg->status & STATUS_USBIN_VALID);

	power_supply_changed(chg->usb_psy);



	return IRQ_HANDLED;
@@ -849,6 +858,18 @@ static int smbb_charger_probe(struct platform_device *pdev) 
		return PTR_ERR(chg->usb_psy);

	}



	chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable);

	if (IS_ERR(chg->edev)) {

		dev_err(&pdev->dev, "failed to allocate extcon device\n");

		return -ENOMEM;

	}



	rc = devm_extcon_dev_register(&pdev->dev, chg->edev);

	if (rc < 0) {

		dev_err(&pdev->dev, "failed to register extcon device\n");

		return rc;

	}



	if (!chg->dc_disabled) {

		dc_cfg.drv_data = chg;

		dc_cfg.supplied_to = smbb_bif;