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extcon: qcom-spmi: Add support for VBUS detection

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VBUS can be detected via a dedicated PMIC pin. Add support
for reporting the VBUS status.

Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
Signed-off-by: Kavya Nunna <knunna@codeaurora.org>
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Anirudh Ghayal 2021-01-25 16:38:32 -08:00 committed by Chanwoo Choi
parent 4fcdd677c4
commit 7b1222b224
1 changed files with 81 additions and 20 deletions
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89
drivers/extcon/extcon-qcom-spmi-misc.c
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@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only // SPDX-License-Identifier: GPL-2.0-only
/** /**
* extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID * extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID
* detection based on extcon-usb-gpio.c. * and VBUS detection based on extcon-usb-gpio.c.
* *
* Copyright (C) 2016 Linaro, Ltd. * Copyright (C) 2016 Linaro, Ltd.
* Stephen Boyd <stephen.boyd@linaro.org> * Stephen Boyd <stephen.boyd@linaro.org>
@ -21,30 +21,56 @@
struct qcom_usb_extcon_info { struct qcom_usb_extcon_info {
struct extcon_dev *edev; struct extcon_dev *edev;
int irq; int id_irq;
int vbus_irq;
struct delayed_work wq_detcable; struct delayed_work wq_detcable;
unsigned long debounce_jiffies; unsigned long debounce_jiffies;
}; };
static const unsigned int qcom_usb_extcon_cable[] = { static const unsigned int qcom_usb_extcon_cable[] = {
EXTCON_USB,
EXTCON_USB_HOST, EXTCON_USB_HOST,
EXTCON_NONE, EXTCON_NONE,
}; };
static void qcom_usb_extcon_detect_cable(struct work_struct *work) static void qcom_usb_extcon_detect_cable(struct work_struct *work)
{ {
bool id; bool state = false;
int ret; int ret;
union extcon_property_value val;
struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work), struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work),
struct qcom_usb_extcon_info, struct qcom_usb_extcon_info,
wq_detcable); wq_detcable);
if (info->id_irq > 0) {
/* check ID and update cable state */ /* check ID and update cable state */
ret = irq_get_irqchip_state(info->irq, IRQCHIP_STATE_LINE_LEVEL, &id); ret = irq_get_irqchip_state(info->id_irq,
IRQCHIP_STATE_LINE_LEVEL, &state);
if (ret) if (ret)
return; return;
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !id); if (!state) {
val.intval = true;
extcon_set_property(info->edev, EXTCON_USB_HOST,
EXTCON_PROP_USB_SS, val);
}
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !state);
}
if (info->vbus_irq > 0) {
/* check VBUS and update cable state */
ret = irq_get_irqchip_state(info->vbus_irq,
IRQCHIP_STATE_LINE_LEVEL, &state);
if (ret)
return;
if (state) {
val.intval = true;
extcon_set_property(info->edev, EXTCON_USB,
EXTCON_PROP_USB_SS, val);
}
extcon_set_state_sync(info->edev, EXTCON_USB, state);
}
} }
static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id) static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id)
@ -79,14 +105,22 @@ static int qcom_usb_extcon_probe(struct platform_device *pdev)
return ret; return ret;
} }
ret = extcon_set_property_capability(info->edev,
EXTCON_USB, EXTCON_PROP_USB_SS);
ret |= extcon_set_property_capability(info->edev,
EXTCON_USB_HOST, EXTCON_PROP_USB_SS);
if (ret) {
dev_err(dev, "failed to register extcon props rc=%d\n",
ret);
return ret;
}
info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS); info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS);
INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable); INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable);
info->irq = platform_get_irq_byname(pdev, "usb_id"); info->id_irq = platform_get_irq_byname(pdev, "usb_id");
if (info->irq < 0) if (info->id_irq > 0) {
return info->irq; ret = devm_request_threaded_irq(dev, info->id_irq, NULL,
ret = devm_request_threaded_irq(dev, info->irq, NULL,
qcom_usb_irq_handler, qcom_usb_irq_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING | IRQF_ONESHOT, IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
@ -95,6 +129,25 @@ static int qcom_usb_extcon_probe(struct platform_device *pdev)
dev_err(dev, "failed to request handler for ID IRQ\n"); dev_err(dev, "failed to request handler for ID IRQ\n");
return ret; return ret;
} }
}
info->vbus_irq = platform_get_irq_byname(pdev, "usb_vbus");
if (info->vbus_irq > 0) {
ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL,
qcom_usb_irq_handler,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
pdev->name, info);
if (ret < 0) {
dev_err(dev, "failed to request handler for VBUS IRQ\n");
return ret;
}
}
if (info->id_irq < 0 && info->vbus_irq < 0) {
dev_err(dev, "ID and VBUS IRQ not found\n");
return -EINVAL;
}
platform_set_drvdata(pdev, info); platform_set_drvdata(pdev, info);
device_init_wakeup(dev, 1); device_init_wakeup(dev, 1);
@ -120,8 +173,12 @@ static int qcom_usb_extcon_suspend(struct device *dev)
struct qcom_usb_extcon_info *info = dev_get_drvdata(dev); struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
int ret = 0; int ret = 0;
if (device_may_wakeup(dev)) if (device_may_wakeup(dev)) {
ret = enable_irq_wake(info->irq); if (info->id_irq > 0)
ret = enable_irq_wake(info->id_irq);
if (info->vbus_irq > 0)
ret = enable_irq_wake(info->vbus_irq);
}
return ret; return ret;
} }
@ -131,8 +188,12 @@ static int qcom_usb_extcon_resume(struct device *dev)
struct qcom_usb_extcon_info *info = dev_get_drvdata(dev); struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
int ret = 0; int ret = 0;
if (device_may_wakeup(dev)) if (device_may_wakeup(dev)) {
ret = disable_irq_wake(info->irq); if (info->id_irq > 0)
ret = disable_irq_wake(info->id_irq);
if (info->vbus_irq > 0)
ret = disable_irq_wake(info->vbus_irq);
}
return ret; return ret;
} }