diff options
| author | Felipe Balbi <balbi@ti.com> | 2015-12-30 03:55:45 +0300 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2016-02-05 08:15:31 +0300 |
| commit | b7aad8e2685b0aa58295bc4250c8476c9c7193eb (patch) | |
| tree | b55b0b167b9ef6fd47da7140ec04ba6fe0cfd2e8 /drivers/extcon/extcon-palmas.c | |
| parent | c4924e92442d7218bd725e47fa3988c73aae84c9 (diff) | |
| download | linux-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.c | 50 |
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) |