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power: qcom_smbb: Make an extcon for usb cable detection

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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: Stephen Boyd <stephen.boyd@linaro.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Stephen Boyd 2016-06-25 22:54:37 -07:00 committed by Sebastian Reichel
parent c5ed330794
commit eee1d077f0
2 changed files with 22 additions and 0 deletions
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1
drivers/power/Kconfig
View File

@ -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

21
drivers/power/qcom_smbb.c
View File

@ -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;