diff options
| author | Frederic Danis <frederic.danis@linux.intel.com> | 2015-08-11 17:35:37 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-08-11 22:26:27 +0300 |
| commit | ae056908862bf1ec8d56bc365280f3dab7941886 (patch) | |
| tree | e20dafe0adbb99bd78960a734a3705b55d444c4a /drivers/bluetooth | |
| parent | 9e6080936c3e507da60492a8a606bdd1164baa81 (diff) | |
| download | linux-ae056908862bf1ec8d56bc365280f3dab7941886.tar.xz | |
Bluetooth: hci_bcm: Retrieve UART speed from ACPI
Parse platform_device's ACPI to retrieve UART init speed.
When BCM device is open, check if its TTY has same parent as one of the
platform devices saved. If yes, use platform_device's init speed.
Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 6ac66364684d..12490ebef234 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -49,6 +49,8 @@ struct bcm_device { struct clk *clk; bool clk_enabled; + + u32 init_speed; }; struct bcm_data { @@ -167,6 +169,7 @@ static int bcm_open(struct hci_uart *hu) */ if (hu->tty->dev->parent == dev->pdev->dev.parent) { bcm->dev = dev; + hu->init_speed = dev->init_speed; break; } } @@ -324,11 +327,29 @@ static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = { { }, }; +static int bcm_resource(struct acpi_resource *ares, void *data) +{ + struct bcm_device *dev = data; + + if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { + struct acpi_resource_uart_serialbus *sb; + + sb = &ares->data.uart_serial_bus; + if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) + dev->init_speed = sb->default_baud_rate; + } + + /* Always tell the ACPI core to skip this resource */ + return 1; +} + static int bcm_acpi_probe(struct bcm_device *dev) { struct platform_device *pdev = dev->pdev; const struct acpi_device_id *id; struct gpio_desc *gpio; + struct acpi_device *adev; + LIST_HEAD(resources); int ret; id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); @@ -368,6 +389,13 @@ static int bcm_acpi_probe(struct bcm_device *dev) return -EINVAL; } + /* Retrieve UART ACPI info */ + adev = ACPI_COMPANION(&dev->pdev->dev); + if (!adev) + return 0; + + acpi_dev_get_resources(adev, &resources, bcm_resource, dev); + return 0; } |