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authorMarcel Holtmann <marcel@holtmann.org>2017-08-16 09:53:30 +0200
committerJohan Hedberg <johan.hedberg@intel.com>2017-08-16 17:51:27 +0300
commit74183a1c50a3c61e62d2e585107ea3c0b942a3ff (patch)
tree6b8f18fb485ec09b3115d288e787f28a678c0c53 /drivers/bluetooth
parenta0085f2510e8976614ad8f766b209448b385492f (diff)
Bluetooth: hci_bcm: Use operation speed of 4Mbps only for ACPI devices
Not all Broadcom controller support the 4Mbps operational speed on UART devices. This is because the UART clock setting changes might not be supported. < HCI Command: Broadcom Write UART Clock Setting (0x3f|0x0045) plen 1 01 . > HCI Event: Command Complete (0x0e) plen 4 Broadcom Write UART Clock Setting (0x3f|0x0045) ncmd 1 Status: Unknown HCI Command (0x01) To support any operational speed higher than 3Mbps, support for this command is required. With that respect it is better to not enforce any operational speed by default. Only when its support is known, then allow for higher operational speed. This patch assigns the 4Mbps opertional speed only for devices discovered through ACPI and leave all others at the default 115200. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_bcm.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 6b42372c53ef..1eb286ade48a 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -59,6 +59,7 @@ struct bcm_device {
bool clk_enabled;
u32 init_speed;
+ u32 oper_speed;
int irq;
u8 irq_polarity;
@@ -303,6 +304,7 @@ 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;
+ hu->oper_speed = dev->oper_speed;
#ifdef CONFIG_PM
dev->hu = hu;
#endif
@@ -699,8 +701,10 @@ static int bcm_resource(struct acpi_resource *ares, void *data)
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
sb = &ares->data.uart_serial_bus;
- if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
+ if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
dev->init_speed = sb->default_baud_rate;
+ dev->oper_speed = 4000000;
+ }
break;
default:
@@ -853,7 +857,6 @@ static const struct hci_uart_proto bcm_proto = {
.name = "Broadcom",
.manufacturer = 15,
.init_speed = 115200,
- .oper_speed = 4000000,
.open = bcm_open,
.close = bcm_close,
.flush = bcm_flush,

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