Commit e09070c5 authored by Hans de Goede's avatar Hans de Goede Committed by Marcel Holtmann
Browse files

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: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a41e0796

drivers/bluetooth/hci_bcm.c

+15 −5
Original line number Diff line number Diff line
@@ -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)
@@ -989,12 +993,18 @@ static int bcm_acpi_probe(struct bcm_device *dev) 
	}

	acpi_dev_free_resource_list(&resources);



	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;

}