summaryrefslogtreecommitdiff
path: root/drivers/bluetooth
diff options
context:
space:
mode:
authorFrederic Danis <frederic.danis@linux.intel.com>2015-08-11 17:35:37 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-08-11 22:26:27 +0300
commitae056908862bf1ec8d56bc365280f3dab7941886 (patch)
treee20dafe0adbb99bd78960a734a3705b55d444c4a /drivers/bluetooth
parent9e6080936c3e507da60492a8a606bdd1164baa81 (diff)
downloadlinux-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.c28
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;
}