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| author | Hans de Goede <hdegoede@redhat.com> | 2018-03-16 21:28:07 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2018-04-01 14:25:31 +0200 |
| commit | e09070c51b280567695022237e57c428e548b355 (patch) | |
| tree | 44155380d4c8fbbbf4b00e7b5210f42200c02589 | |
| parent | a41e0796396eeceff673af4a38feaee149c6ff86 (diff) | |
| download | lwn-e09070c51b280567695022237e57c428e548b355.tar.gz lwn-e09070c51b280567695022237e57c428e548b355.zip | |
Bluetooth: hci_bcm: Add irq_polarity module option
Add irq_polarity module option for easier troubleshooting of irq-polarity
issues.
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index ff7535e85dea..50c8523f8653 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -126,6 +126,10 @@ struct bcm_data { static DEFINE_MUTEX(bcm_device_lock); static LIST_HEAD(bcm_device_list); +static int irq_polarity = -1; +module_param(irq_polarity, int, 0444); +MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); + static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) { if (hu->serdev) @@ -989,11 +993,17 @@ static int bcm_acpi_probe(struct bcm_device *dev) } acpi_dev_free_resource_list(&resources); - dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); - if (dmi_id) { - dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low", - dmi_id->ident); - dev->irq_active_low = true; + if (irq_polarity != -1) { + dev->irq_active_low = irq_polarity; + dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", + dev->irq_active_low ? "low" : "high"); + } else { + dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); + if (dmi_id) { + dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low", + dmi_id->ident); + dev->irq_active_low = true; + } } return 0; |