An IRQ can be retrieved from the pdev resources. This irq will be used
in case of LPM suspend mode to wake-up the host and resume the link.
This resource can be declared as a GPIO-Interrupt which requires to be
converted into IRQ.
Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxx>
---
drivers/bluetooth/hci_intel.c | 45 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 44 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index 46426ff..934b5a7 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -31,6 +31,7 @@
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/acpi.h>
+#include <linux/interrupt.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -48,6 +49,7 @@ struct intel_device {
struct list_head list;
struct platform_device *pdev;
struct gpio_desc *reset;
+ int irq;
};
static LIST_HEAD(intel_device_list);
@@ -789,6 +791,15 @@ static const struct hci_uart_proto intel_proto = {
.dequeue = intel_dequeue,
};
+static irqreturn_t intel_irq(int irq, void *dev_id)
+{
+ struct intel_device *idev = dev_id;
+
+ dev_info(&idev->pdev->dev, "hci_intel irq\n");
+
+ return IRQ_HANDLED;
+}
+
#ifdef CONFIG_ACPI
static const struct acpi_device_id intel_acpi_match[] = {
{ "INT33E1", 0 },
@@ -816,6 +827,7 @@ static int intel_acpi_probe(struct intel_device *idev)
static int intel_probe(struct platform_device *pdev)
{
struct intel_device *idev;
+ int err;
idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
if (!idev)
@@ -838,6 +850,36 @@ static int intel_probe(struct platform_device *pdev)
return PTR_ERR(idev->reset);
}
+ idev->irq = platform_get_irq(pdev, 0);
+ if (idev->irq < 0) {
+ struct gpio_desc *host_wake;
+
+ dev_err(&pdev->dev, "No IRQ, falling back to gpio-irq\n");
+
+ host_wake = devm_gpiod_get_optional(&pdev->dev, "host-wake",
+ GPIOD_IN);
+ if (IS_ERR(host_wake)) {
+ dev_err(&pdev->dev, "Unable to retrieve IRQ\n");
+ goto no_irq;
+ }
+
+ idev->irq = gpiod_to_irq(host_wake);
+ if (idev->irq < 0) {
+ dev_err(&pdev->dev, "No corresponding irq for gpio\n");
+ goto no_irq;
+ }
+ }
+
+ err = devm_request_threaded_irq(&pdev->dev, idev->irq, NULL, intel_irq,
+ IRQF_ONESHOT, "bt-host-wake", idev);
+ if (err) {
+ dev_err(&pdev->dev, "unable to allocate irq\n");
+ return err;
+ }
+
+ device_init_wakeup(&pdev->dev, true);
+
+no_irq:
platform_set_drvdata(pdev, idev);
/* Place this instance on the device list */
@@ -845,7 +887,8 @@ static int intel_probe(struct platform_device *pdev)
list_add_tail(&idev->list, &intel_device_list);
spin_unlock(&intel_device_list_lock);
- dev_info(&pdev->dev, "registered.\n");
+ dev_info(&pdev->dev, "registered, gpio(%d)/irq(%d).\n",
+ desc_to_gpio(idev->reset), idev->irq);
return 0;
}
--
1.9.1
--
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