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Subject[PATCH 4.16 001/196] Bluetooth: hci_bcm: Add irq_polarity module option
Date
4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hans de Goede <hdegoede@redhat.com>

commit e09070c51b280567695022237e57c428e548b355 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/bluetooth/hci_bcm.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)

--- 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)
@@ -975,11 +979,17 @@ static int bcm_acpi_probe(struct bcm_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;

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