diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-pci.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index b773fb53d6a7..27e4fc896e9d 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -21,6 +21,8 @@ #include <linux/slab.h> #include <linux/pci.h> #include <linux/platform_device.h> +#include <linux/gpio/consumer.h> +#include <linux/acpi.h> #include "platform_data.h" @@ -31,6 +33,15 @@ #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 #define PCI_DEVICE_ID_INTEL_SPTH 0xa130 +static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; +static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; + +static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { + { "reset-gpios", &reset_gpios, 1 }, + { "cs-gpios", &cs_gpios, 1 }, + { }, +}; + static int dwc3_pci_quirks(struct pci_dev *pdev) { if (pdev->vendor == PCI_VENDOR_ID_AMD && @@ -65,6 +76,30 @@ static int dwc3_pci_quirks(struct pci_dev *pdev) sizeof(pdata)); } + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + pdev->device == PCI_DEVICE_ID_INTEL_BYT) { + struct gpio_desc *gpio; + + acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), + acpi_dwc3_byt_gpios); + + /* These GPIOs will turn on the USB2 PHY */ + gpio = gpiod_get(&pdev->dev, "cs"); + if (!IS_ERR(gpio)) { + gpiod_direction_output(gpio, 0); + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + } + + gpio = gpiod_get(&pdev->dev, "reset"); + if (!IS_ERR(gpio)) { + gpiod_direction_output(gpio, 0); + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + usleep_range(10000, 11000); + } + } + return 0; } @@ -128,6 +163,7 @@ err: static void dwc3_pci_remove(struct pci_dev *pci) { + acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); platform_device_unregister(pci_get_drvdata(pci)); } |