From: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
To: linux-serial@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org, magnus.damm@gmail.com,
laurent.pinchart@ideasonboard.com, wsa@the-dreams.de,
robh@kernel.org, peda@axentia.se, geert@linux-m68k.org,
linux-i2c@vger.kernel.org,
Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Subject: [PATCH 3/6] serial: core: support deferring serdev controller registration
Date: Wed, 16 Aug 2017 15:22:25 +0200 [thread overview]
Message-ID: <1502889748-31499-4-git-send-email-ulrich.hecht+renesas@gmail.com> (raw)
In-Reply-To: <1502889748-31499-1-git-send-email-ulrich.hecht+renesas@gmail.com>
serdev controllers may depend on other devices (such as multiplexers)
and thus require deferred probing support.
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
---
drivers/tty/serial/serial_core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index f534a40..30a8997 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2785,6 +2785,10 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
uport->line, uport->dev, port, uport->tty_groups);
if (likely(!IS_ERR(tty_dev))) {
device_set_wakeup_capable(tty_dev, 1);
+ } else if (PTR_ERR(tty_dev) == -EPROBE_DEFER) {
+ ret = -EPROBE_DEFER;
+ state->uart_port = NULL;
+ goto out;
} else {
dev_err(uport->dev, "Cannot register tty device on line %d\n",
uport->line);
--
2.7.4
next prev parent reply other threads:[~2017-08-16 13:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-16 13:22 [PATCH 0/6] serdev multiplexing support Ulrich Hecht
2017-08-16 13:22 ` [PATCH 1/6] serdev: add method to set parity Ulrich Hecht
2017-08-16 13:22 ` [PATCH 2/6] serdev: add multiplexer support Ulrich Hecht
2017-08-16 13:22 ` Ulrich Hecht [this message]
2017-08-16 13:22 ` [PATCH 4/6] max9260: add driver for i2c over GMSL passthrough Ulrich Hecht
2017-08-16 13:22 ` [PATCH 5/6] ARM: dts: blanche: add SCIF1 and MAX9260 deserializer Ulrich Hecht
2017-08-21 8:54 ` Simon Horman
2017-08-16 13:22 ` [PATCH 6/6] dt-bindings: slave-device: add reg property Ulrich Hecht
2017-08-16 13:27 ` Laurent Pinchart
2017-08-28 12:55 ` [PATCH 0/6] serdev multiplexing support Greg KH
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