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Subject[PATCH v2 05/15] Bluetooth: hci_bcm: Handle deferred probing for the clock supply
Date
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(+)

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index ddbd8c6a0ceb..800132369134 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 (dev->clk == ERR_PTR(-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))
--
2.19.1
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