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power: qpnp-smbcharger: Add voltage now property in usb psy

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Add VOLTAGE_NOW power supply property to expose the USB voltage.

Change-Id: I3041aafaf365c205e53451a5d4ee79dcfe6b78bf
Signed-off-by: Kavya Nunna <knunna@codeaurora.org>
This commit is contained in:
Kavya Nunna 2019-05-20 11:42:22 +05:30
parent 716a46317a
commit 726ccfec94
2 changed files with 44 additions and 0 deletions
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1
Documentation/devicetree/bindings/power/supply/qcom/qpnp-smbcharger.txt
View file

@ -281,6 +281,7 @@ Optional Properties:
suspending USB path for fake
battery.
- qcom,vchg_sns-vadc Phandle of the VADC node.
- qcom,usbin-vadc Phandle of the VADC node.
- qcom,vchg-adc-channel-id The ADC channel to which the VCHG is routed.
Example:

43
drivers/power/supply/qcom/qpnp-smbcharger.c
View file

@ -277,6 +277,7 @@ struct smbchg_chip {
bool skip_usb_notification;
u32 vchg_adc_channel;
struct qpnp_vadc_chip *vchg_vadc_dev;
struct qpnp_vadc_chip *vusb_vadc_dev;
/* voters */
struct votable *fcc_votable;
@ -5744,6 +5745,30 @@ static void update_typec_otg_status(struct smbchg_chip *chip, int mode,
}
}
static int smbchg_get_vusb(struct smbchg_chip *chip)
{
int rc;
struct qpnp_vadc_result adc_result;
if (!is_usb_present(chip))
return 0;
if (chip->vusb_vadc_dev) {
rc = qpnp_vadc_read(chip->vusb_vadc_dev,
USBIN, &adc_result);
if (rc < 0) {
pr_smb(PR_STATUS,
"error in vusb_uv read rc = %d\n", rc);
return rc;
}
} else {
return -ENODATA;
}
pr_smb(PR_STATUS, "The value of vusb_uv %lld\n", adc_result.physical);
return adc_result.physical;
}
static int smbchg_set_sdp_current(struct smbchg_chip *chip, int current_ma)
{
if (chip->usb_supply_type == POWER_SUPPLY_TYPE_USB) {
@ -5799,6 +5824,9 @@ static int smbchg_usb_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_HEALTH:
val->intval = chip->usb_health;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = smbchg_get_vusb(chip);
break;
default:
return -EINVAL;
}
@ -5854,6 +5882,7 @@ static enum power_supply_property smbchg_usb_properties[] = {
POWER_SUPPLY_PROP_REAL_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_SDP_CURRENT_MAX,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
#define CHARGE_OUTPUT_VTG_RATIO 840
@ -8201,6 +8230,7 @@ static int smbchg_probe(struct platform_device *pdev)
struct smbchg_chip *chip;
struct power_supply *typec_psy = NULL;
struct qpnp_vadc_chip *vadc_dev = NULL, *vchg_vadc_dev = NULL;
struct qpnp_vadc_chip *vusb_vadc_dev = NULL;
const char *typec_psy_name;
struct power_supply_config usb_psy_cfg = {};
struct power_supply_config batt_psy_cfg = {};
@ -8249,6 +8279,18 @@ static int smbchg_probe(struct platform_device *pdev)
}
}
vusb_vadc_dev = NULL;
if (of_find_property(pdev->dev.of_node, "qcom,usbin-vadc", NULL)) {
vusb_vadc_dev = qpnp_get_vadc(&pdev->dev, "usbin");
if (IS_ERR(vusb_vadc_dev)) {
rc = PTR_ERR(vusb_vadc_dev);
if (rc != -EPROBE_DEFER)
dev_err(&pdev->dev, "Couldn't get vadc 'usbin' rc=%d\n",
rc);
return rc;
}
}
chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
@ -8354,6 +8396,7 @@ static int smbchg_probe(struct platform_device *pdev)
init_completion(&chip->usbin_uv_raised);
chip->vadc_dev = vadc_dev;
chip->vchg_vadc_dev = vchg_vadc_dev;
chip->vusb_vadc_dev = vusb_vadc_dev;
chip->pdev = pdev;
chip->dev = &pdev->dev;