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 --- drivers/bluetooth/hci_bcm.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 5e3aba3c3185..bb6cd1623132 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) @@ -988,11 +992,17 @@ 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;