diff options
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 03a365148184..3e818a429fc5 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -29,6 +29,7 @@ #include <linux/acpi.h> #include <linux/of.h> #include <linux/property.h> +#include <linux/platform_data/x86/apple.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/gpio/consumer.h> @@ -64,7 +65,12 @@ * @shutdown: BT_REG_ON pin, * power up or power down Bluetooth device internal regulators * @set_device_wakeup: callback to toggle BT_WAKE pin + * either by accessing @device_wakeup or by calling @btlp * @set_shutdown: callback to toggle BT_REG_ON pin + * either by accessing @shutdown or by calling @btpu/@btpd + * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") + * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") + * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") * @clk: clock used by Bluetooth device * @clk_enabled: whether @clk is prepared and enabled * @init_speed: default baudrate of Bluetooth device; @@ -90,6 +96,9 @@ struct bcm_device { struct gpio_desc *shutdown; int (*set_device_wakeup)(struct bcm_device *, bool); int (*set_shutdown)(struct bcm_device *, bool); +#ifdef CONFIG_ACPI + acpi_handle btlp, btpu, btpd; +#endif struct clk *clk; bool clk_enabled; @@ -844,6 +853,49 @@ static int bcm_resource(struct acpi_resource *ares, void *data) return 0; } + +static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) +{ + if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) + return -EIO; + + return 0; +} + +static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) +{ + if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, + NULL, NULL, NULL))) + return -EIO; + + return 0; +} + +static int bcm_apple_get_resources(struct bcm_device *dev) +{ + struct acpi_device *adev = ACPI_COMPANION(dev->dev); + const union acpi_object *obj; + + if (!adev || + ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || + ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || + ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) + return -ENODEV; + + if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && + obj->buffer.length == 8) + dev->init_speed = *(u64 *)obj->buffer.pointer; + + dev->set_device_wakeup = bcm_apple_set_device_wakeup; + dev->set_shutdown = bcm_apple_set_shutdown; + + return 0; +} +#else +static inline int bcm_apple_get_resources(struct bcm_device *dev) +{ + return -EOPNOTSUPP; +} #endif /* CONFIG_ACPI */ static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) @@ -862,6 +914,9 @@ static int bcm_get_resources(struct bcm_device *dev) { dev->name = dev_name(dev->dev); + if (x86_apple_machine && !bcm_apple_get_resources(dev)) + return 0; + dev->clk = devm_clk_get(dev->dev, NULL); dev->device_wakeup = devm_gpiod_get(dev->dev, "device-wakeup", |