Re: [PATCH 7/9] Bluetooth: hci_bcm: Make acpi_probe get irq from ACPI resources

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Hi,

On 03-10-17 19:21, Frédéric Danis wrote:
Hi Hans,

First of all, many thanks for your work on this, it helped me a lot to get full Bluetooth on my Asus T100.

You're welcome thank you for your patches tying everything
together, it will be good to have this all finally working
OOTB.

Le 02/10/2017 à 17:23, Hans de Goede a écrit :
The ACPI subsys is going to move over to instantiating ACPI enumerated
HCIs as serdevs, rather then as platform devices.

So we need to make bcm_acpi_probe() suitable for use on non platform-
devices too, which means that we cannot rely on platform_get_irq()
getting called.

This commit modifies bcm_acpi_probe() to directly get the irq from
the ACPI resources, this is a preparation patch for adding (runtime)pm
support to the serdev path.

Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
  drivers/bluetooth/hci_bcm.c | 8 ++++++++
  1 file changed, 8 insertions(+)

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 5c8371d8aace..48a428909958 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -805,6 +805,7 @@ static int bcm_acpi_probe(struct bcm_device *dev)
      const struct dmi_system_id *dmi_id;
      const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
      const struct acpi_device_id *id;
+    struct resource_entry *entry;
      int ret;
      /* Retrieve GPIO data */
@@ -821,6 +822,13 @@ static int bcm_acpi_probe(struct bcm_device *dev)
                       &resources, bcm_resource, dev);
      if (ret < 0)
          return ret;
+
+    resource_list_for_each_entry(entry, &resources) {
+        if (resource_type(entry->res) == IORESOURCE_IRQ) {
+            dev->irq = entry->res->start;
+            break;
+        }
+    }
      acpi_dev_free_resource_list(&resources);
      dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table);

You should also return 0 in bcm_resource(), otherwise the resources list is empty, ending up with "BCM irq: -22" trace in dmesg.

Right, good one. I did not notice that as on the device I was testing with
the IRQ is specified in the DSDT as a GpioInt rather as an Interrupt.

Fixed for v2 of this series.

Regards,

Hans
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