From: Chen-Yu Tsai <wens@csie.org>
To: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Maxime Ripard <maxime.ripard@bootlin.com>
Cc: linux-sunxi@googlegroups.com, Chen-Yu Tsai <wens@csie.org>,
Loic Poulain <loic.poulain@gmail.com>,
linux-bluetooth@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 05/15] Bluetooth: hci_bcm: Handle deferred probing for the clock supply
Date: Wed, 7 Nov 2018 18:12:58 +0800 [thread overview]
Message-ID: <20181107101308.7626-6-wens@csie.org> (raw)
In-Reply-To: <20181107101308.7626-1-wens@csie.org>
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..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))
--
2.19.1
next prev parent reply other threads:[~2018-11-07 10:20 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-07 10:12 [PATCH 00/15] ARM: sunxi: Enable Broadcom-based Bluetooth controllers Chen-Yu Tsai
2018-11-07 10:12 ` [PATCH 01/15] dt-bindings: net: broadcom-bluetooth: Fix external clock names Chen-Yu Tsai
[not found] ` <5bea0ebe.1c69fb81.e15d7.98e1@mx.google.com>
2018-11-14 3:15 ` Chen-Yu Tsai
2018-11-14 15:51 ` Rob Herring
2018-11-14 16:13 ` Chen-Yu Tsai
2018-11-07 10:12 ` [PATCH 02/15] dt-bindings: net: broadcom-bluetooth: Add VBAT and VDDIO supplies Chen-Yu Tsai
2018-11-07 10:12 ` [PATCH 03/15] dt-bindings: net: broadcom-bluetooth: Add BCM20702A1 compatible string Chen-Yu Tsai
2018-11-07 10:12 ` [PATCH 04/15] dt-bindings: net: broadcom-bluetooth: Add BCM4330 " Chen-Yu Tsai
2018-11-07 10:12 ` Chen-Yu Tsai [this message]
2018-11-07 10:12 ` [PATCH 06/15] Bluetooth: hci_bcm: Simplify clk_get error handling Chen-Yu Tsai
2018-11-07 10:51 ` Russell King - ARM Linux
2018-11-07 10:13 ` [PATCH 07/15] Bluetooth: hci_bcm: Use "txco" and "extclk" to get clock reference Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 08/15] Bluetooth: hci_bcm: Add support for LPO clock Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 09/15] Bluetooth: hci_bcm: Add support for regulator supplies Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 10/15] Bluetooth: hci_bcm: Wait for device to come out of reset after power on Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 11/15] Bluetooth: hci_bcm: Add BCM20702A1 variant Chen-Yu Tsai
2018-11-07 20:36 ` Maxime Ripard
2018-11-08 6:53 ` Chen-Yu Tsai
2018-11-08 8:21 ` Maxime Ripard
2018-11-07 10:13 ` [PATCH 12/15] Bluetooth: hci_bcm: Add compatible string for BCM4330 Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 13/15] Bluetooth: btbcm: Add default address for BCM43430A0 Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 14/15] ARM: dts: sunxi: Enable Broadcom-based Bluetooth for multiple boards Chen-Yu Tsai
2018-11-08 8:24 ` Maxime Ripard
2018-11-14 5:06 ` Chen-Yu Tsai
2018-11-07 10:13 ` [PATCH 15/15] arm64: dts: allwinner: a64: bananapi-m64: Add Bluetooth device node Chen-Yu Tsai
2018-11-08 8:25 ` Maxime Ripard
2018-11-08 8:35 ` Marcel Holtmann
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