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authorFelipe Balbi <balbi@ti.com>2015-12-30 03:55:45 +0300
committerChanwoo Choi <cw00.choi@samsung.com>2016-02-05 08:15:31 +0300
commitb7aad8e2685b0aa58295bc4250c8476c9c7193eb (patch)
treeb55b0b167b9ef6fd47da7140ec04ba6fe0cfd2e8 /drivers/extcon/extcon-palmas.c
parentc4924e92442d7218bd725e47fa3988c73aae84c9 (diff)
downloadlinux-b7aad8e2685b0aa58295bc4250c8476c9c7193eb.tar.xz
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>
Diffstat (limited to 'drivers/extcon/extcon-palmas.c')
-rw-r--r--drivers/extcon/extcon-palmas.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index 93c30a885740..885ee95a6a7b 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -216,11 +216,23 @@ static int palmas_usb_probe(struct platform_device *pdev)
return PTR_ERR(palmas_usb->id_gpiod);
}
+ palmas_usb->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus",
+ GPIOD_IN);
+ if (IS_ERR(palmas_usb->vbus_gpiod)) {
+ dev_err(&pdev->dev, "failed to get vbus gpio\n");
+ return PTR_ERR(palmas_usb->vbus_gpiod);
+ }
+
if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) {
palmas_usb->enable_id_detection = false;
palmas_usb->enable_gpio_id_detection = true;
}
+ if (palmas_usb->enable_vbus_detection && palmas_usb->vbus_gpiod) {
+ palmas_usb->enable_vbus_detection = false;
+ palmas_usb->enable_gpio_vbus_detection = true;
+ }
+
if (palmas_usb->enable_gpio_id_detection) {
u32 debounce;
@@ -311,6 +323,40 @@ static int palmas_usb_probe(struct platform_device *pdev)
palmas_usb->vbus_irq, status);
return status;
}
+ } else if (palmas_usb->enable_gpio_vbus_detection) {
+ /* remux GPIO_1 as VBUSDET */
+ status = palmas_update_bits(palmas,
+ PALMAS_PU_PD_OD_BASE,
+ PALMAS_PRIMARY_SECONDARY_PAD1,
+ PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK,
+ (1 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT));
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't remux GPIO1\n");
+ return status;
+ }
+
+ palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_VBUS_OTG_IRQ);
+ palmas_usb->gpio_vbus_irq = gpiod_to_irq(palmas_usb->vbus_gpiod);
+ if (palmas_usb->gpio_vbus_irq < 0) {
+ dev_err(&pdev->dev, "failed to get vbus irq\n");
+ return palmas_usb->gpio_vbus_irq;
+ }
+ status = devm_request_threaded_irq(&pdev->dev,
+ palmas_usb->gpio_vbus_irq,
+ NULL,
+ palmas_vbus_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT |
+ IRQF_EARLY_RESUME,
+ "palmas_usb_vbus",
+ palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev,
+ "failed to request handler for vbus irq\n");
+ return status;
+ }
}
palmas_enable_irq(palmas_usb);
@@ -337,6 +383,8 @@ static int palmas_usb_suspend(struct device *dev)
if (device_may_wakeup(dev)) {
if (palmas_usb->enable_vbus_detection)
enable_irq_wake(palmas_usb->vbus_irq);
+ if (palmas_usb->enable_gpio_vbus_detection)
+ enable_irq_wake(palmas_usb->gpio_vbus_irq);
if (palmas_usb->enable_id_detection)
enable_irq_wake(palmas_usb->id_irq);
if (palmas_usb->enable_gpio_id_detection)
@@ -352,6 +400,8 @@ static int palmas_usb_resume(struct device *dev)
if (device_may_wakeup(dev)) {
if (palmas_usb->enable_vbus_detection)
disable_irq_wake(palmas_usb->vbus_irq);
+ if (palmas_usb->enable_gpio_vbus_detection)
+ disable_irq_wake(palmas_usb->gpio_vbus_irq);
if (palmas_usb->enable_id_detection)
disable_irq_wake(palmas_usb->id_irq);
if (palmas_usb->enable_gpio_id_detection)