[05/15] Bluetooth: hci_bcm: Handle deferred probing for the clock supply
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Message ID 20181107101308.7626-6-wens@csie.org
State Superseded, archived
Headers show
Series
  • ARM: sunxi: Enable Broadcom-based Bluetooth controllers
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Commit Message

Chen-Yu Tsai Nov. 7, 2018, 10:12 a.m. UTC
On some systems that actually have the bluetooth controller wired up
with an extra clock signal, it's possible the bluetooth controller
probes before the clock provider. clk_get would return a defer probe
error, which was not handled by this driver.

Handle this properly, so that these systems can work reliably.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/bluetooth/hci_bcm.c | 4 ++++
 1 file changed, 4 insertions(+)

Patch
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diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index ddbd8c6a0ceb..0a20ad48b511 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -907,6 +907,10 @@  static int bcm_get_resources(struct bcm_device *dev)
 
 	dev->clk = devm_clk_get(dev->dev, NULL);
 
+	/* Handle deferred probing */
+	if (IS_ERR(dev->clk) && PTR_ERR(dev->clk) == -EPROBE_DEFER)
+		return PTR_ERR(dev->clk);
+
 	dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
 						     GPIOD_OUT_LOW);
 	if (IS_ERR(dev->device_wakeup))