forked from Minki/linux
extcon: palmas: Add the support for VBUS detection by using GPIO
This patch support for VBUS detection by using GPIO pin. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Lee Jones <lee.jones@linaro.org>
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c4924e9244
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b7aad8e268
@ -216,11 +216,23 @@ static int palmas_usb_probe(struct platform_device *pdev)
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return PTR_ERR(palmas_usb->id_gpiod);
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}
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palmas_usb->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus",
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GPIOD_IN);
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if (IS_ERR(palmas_usb->vbus_gpiod)) {
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dev_err(&pdev->dev, "failed to get vbus gpio\n");
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return PTR_ERR(palmas_usb->vbus_gpiod);
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}
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if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) {
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palmas_usb->enable_id_detection = false;
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palmas_usb->enable_gpio_id_detection = true;
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}
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if (palmas_usb->enable_vbus_detection && palmas_usb->vbus_gpiod) {
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palmas_usb->enable_vbus_detection = false;
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palmas_usb->enable_gpio_vbus_detection = true;
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}
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if (palmas_usb->enable_gpio_id_detection) {
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u32 debounce;
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@ -311,6 +323,40 @@ static int palmas_usb_probe(struct platform_device *pdev)
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palmas_usb->vbus_irq, status);
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return status;
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}
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} else if (palmas_usb->enable_gpio_vbus_detection) {
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/* remux GPIO_1 as VBUSDET */
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status = palmas_update_bits(palmas,
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PALMAS_PU_PD_OD_BASE,
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PALMAS_PRIMARY_SECONDARY_PAD1,
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PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK,
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(1 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT));
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if (status < 0) {
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dev_err(&pdev->dev, "can't remux GPIO1\n");
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return status;
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}
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palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
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PALMAS_VBUS_OTG_IRQ);
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palmas_usb->gpio_vbus_irq = gpiod_to_irq(palmas_usb->vbus_gpiod);
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if (palmas_usb->gpio_vbus_irq < 0) {
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dev_err(&pdev->dev, "failed to get vbus irq\n");
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return palmas_usb->gpio_vbus_irq;
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}
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status = devm_request_threaded_irq(&pdev->dev,
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palmas_usb->gpio_vbus_irq,
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NULL,
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palmas_vbus_irq_handler,
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IRQF_TRIGGER_FALLING |
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IRQF_TRIGGER_RISING |
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IRQF_ONESHOT |
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IRQF_EARLY_RESUME,
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"palmas_usb_vbus",
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palmas_usb);
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if (status < 0) {
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dev_err(&pdev->dev,
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"failed to request handler for vbus irq\n");
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return status;
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}
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}
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palmas_enable_irq(palmas_usb);
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@ -337,6 +383,8 @@ static int palmas_usb_suspend(struct device *dev)
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if (device_may_wakeup(dev)) {
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if (palmas_usb->enable_vbus_detection)
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enable_irq_wake(palmas_usb->vbus_irq);
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if (palmas_usb->enable_gpio_vbus_detection)
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enable_irq_wake(palmas_usb->gpio_vbus_irq);
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if (palmas_usb->enable_id_detection)
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enable_irq_wake(palmas_usb->id_irq);
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if (palmas_usb->enable_gpio_id_detection)
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@ -352,6 +400,8 @@ static int palmas_usb_resume(struct device *dev)
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if (device_may_wakeup(dev)) {
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if (palmas_usb->enable_vbus_detection)
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disable_irq_wake(palmas_usb->vbus_irq);
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if (palmas_usb->enable_gpio_vbus_detection)
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disable_irq_wake(palmas_usb->gpio_vbus_irq);
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if (palmas_usb->enable_id_detection)
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disable_irq_wake(palmas_usb->id_irq);
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if (palmas_usb->enable_gpio_id_detection)
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@ -580,7 +580,9 @@ struct palmas_usb {
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int vbus_irq;
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int gpio_id_irq;
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int gpio_vbus_irq;
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struct gpio_desc *id_gpiod;
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struct gpio_desc *vbus_gpiod;
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unsigned long sw_debounce_jiffies;
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struct delayed_work wq_detectid;
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@ -589,6 +591,7 @@ struct palmas_usb {
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bool enable_vbus_detection;
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bool enable_id_detection;
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bool enable_gpio_id_detection;
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bool enable_gpio_vbus_detection;
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};
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#define comparator_to_palmas(x) container_of((x), struct palmas_usb, comparator)
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