Bluetooth: hci_bcm: Fix IRQ polarity for T100

ACPI table for BCM2E39 of T100TA is not correct.
Set correct irq_polarity for this device.

Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index f30654149c63b4099eb399b61aa5c5305907af10..2cb50898d667e780273441ba4789c4dc02ebe160 100644 (file)
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -32,6 +32,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/tty.h>
 #include <linux/interrupt.h>
+#include <linux/dmi.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -513,6 +514,22 @@ static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
 };
 
 #ifdef CONFIG_ACPI
+static u8 acpi_active_low = ACPI_ACTIVE_LOW;
+
+/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
+static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = {
+       {
+               .ident = "Asus T100TA",
+               .matches = {
+                       DMI_EXACT_MATCH(DMI_SYS_VENDOR,
+                                       "ASUSTeK COMPUTER INC."),
+                       DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
+               },
+               .driver_data = &acpi_active_low,
+       },
+       { }
+};
+
 static int bcm_resource(struct acpi_resource *ares, void *data)
 {
        struct bcm_device *dev = data;
@@ -552,6 +569,7 @@ static int bcm_acpi_probe(struct bcm_device *dev)
        const struct acpi_device_id *id;
        struct acpi_device *adev;
        LIST_HEAD(resources);
+       const struct dmi_system_id *dmi_id;
        int ret;
 
        id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
@@ -608,6 +626,13 @@ static int bcm_acpi_probe(struct bcm_device *dev)
 
        acpi_dev_get_resources(adev, &resources, bcm_resource, dev);
 
+       dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table);
+       if (dmi_id) {
+               bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
+                           dmi_id->ident);
+               dev->irq_polarity = *(u8 *)dmi_id->driver_data;
+       }
+
        return 0;
 }
 #else