From 815e4fe3fdeab984f3da04ee438f9f657e97f05e Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Mon, 17 Dec 2018 12:04:39 +0800 Subject: Bluetooth: hci_bcm: Handle deferred probing for the clock supply [ Upstream commit 28ac03b9ac3f784c2f048a910c8d0a7a87483b66 ] 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. Tested-by: Ondrej Jirman Signed-off-by: Chen-Yu Tsai Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- drivers/bluetooth/hci_bcm.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/bluetooth') 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)) -- cgit v1.2.3