[PATCH] wifi: mt76: mt7925: Add coredump callback in pci_driver

[PATCH] wifi: mt76: mt7925: Add coredump callback in pci_driver

[JB Tsai]

From: Jeff Hsu <Jeff.Hsu@mediatek.com>

Register coredump callback(mt7925_coredump) in pci_driver,
it can let platform can trigger core dump to collect the
log and recover back after coredump complete without debugfs

Some platform not have debugfs

Signed-off-by: Jeff Hsu <Jeff.Hsu@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c |  1 +
 drivers/net/wireless/mediatek/mt76/mt7925/pci.c | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index 37cdf3e8a067..cd502166a7f9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -1014,6 +1014,7 @@ int mt7925_mcu_chip_config(struct mt792x_dev *dev, const char *cmd)
 	return mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD(CHIP_CONFIG),
 				 &req, sizeof(req), false);
 }
+EXPORT_SYMBOL_GPL(mt7925_mcu_chip_config);
 
 int mt7925_mcu_set_deep_sleep(struct mt792x_dev *dev, bool enable)
 {
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
index c4161754c01d..5b3e62e5f157 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
@@ -610,6 +610,17 @@ static int mt7925_pci_restore(struct device *device)
 	return _mt7925_pci_resume(device, true);
 }
 
+static void mt7925_coredump(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(device);
+	struct mt76_dev *mdev = pci_get_drvdata(pdev);
+	struct mt792x_dev *dev_792x = container_of(mdev, struct mt792x_dev, mt76);
+
+	mt792x_mutex_acquire(dev_792x);
+	mt7925_mcu_chip_config(dev_792x, "assert");
+	mt792x_mutex_release(dev_792x);
+}
+
 static const struct dev_pm_ops mt7925_pm_ops = {
 	.suspend = pm_sleep_ptr(mt7925_pci_suspend),
 	.resume  = pm_sleep_ptr(mt7925_pci_resume),
@@ -626,6 +637,7 @@ static struct pci_driver mt7925_pci_driver = {
 	.remove		= mt7925_pci_remove,
 	.shutdown       = mt7925_pci_shutdown,
 	.driver.pm	= pm_sleep_ptr(&mt7925_pm_ops),
+	.driver.coredump = mt7925_coredump,
 };
 
 module_pci_driver(mt7925_pci_driver);
-- 
2.45.2