linux-kernel - [RESEND v3 1/2] Bluetooth: hci_qca: Add qcom devcoredump sysfs support

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Date:   Wed, 14 Jun 2023 10:28:15 +0530
From:   Sai Teja Aluvala <quic_saluvala@...cinc.com>
To:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        quic_hemantg@...cinc.com, quic_bgodavar@...cinc.com,
        jiangzp@...gle.com, mmandlik@...gle.com,
        Sai Teja Aluvala <quic_saluvala@...cinc.com>
Subject: [RESEND v3 1/2] Bluetooth: hci_qca: Add qcom devcoredump sysfs support

This patch implements the hci_qca driver side .coredump() callback to
trigger a devcoredump via sysfs.

Signed-off-by: Sai Teja Aluvala <quic_saluvala@...cinc.com>

v2 -> V3:
--------
Updated commit text

v1 -> V2:
--------
Updated to work with the updated HCI devcoredump API.
---
 drivers/bluetooth/hci_qca.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index e30c979..1ee5323 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2384,6 +2384,18 @@ static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);
 #endif
 
+#ifdef CONFIG_DEV_COREDUMP
+static void hciqca_coredump(struct device *dev)
+{
+	struct serdev_device *serdev = to_serdev_device(dev);
+	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+	struct hci_uart *hu = &qcadev->serdev_hu;
+	struct hci_dev  *hdev = hu->hdev;
+
+	if (hdev->dump.coredump)
+		hdev->dump.coredump(hdev);
+}
+#endif
 
 static struct serdev_device_driver qca_serdev_driver = {
 	.probe = qca_serdev_probe,
@@ -2394,6 +2406,9 @@ static struct serdev_device_driver qca_serdev_driver = {
 		.acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
 		.shutdown = qca_serdev_shutdown,
 		.pm = &qca_pm_ops,
+#ifdef CONFIG_DEV_COREDUMP
+		.coredump = hciqca_coredump,
+#endif
 	},
 };
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc.