8f9e91ad03
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
28 lines
958 B
Diff
28 lines
958 B
Diff
From a209dbf51afab685d6791bd3fc1d2d1952a844e9 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Thu, 2 Jul 2020 13:53:20 +0100
|
|
Subject: [PATCH] serial: 8250: bcm2835aux - defer if clock is zero
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/3700
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/tty/serial/8250/8250_bcm2835aux.c | 7 +++++++
|
|
1 file changed, 7 insertions(+)
|
|
|
|
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
|
|
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
|
|
@@ -156,6 +156,13 @@ static int bcm2835aux_serial_probe(struc
|
|
*/
|
|
up.port.uartclk *= 2;
|
|
|
|
+ /* The clock is only queried at probe time, which means we get one shot
|
|
+ * at this. A zero clock is never going to work and is almost certainly
|
|
+ * due to a parent not being ready, so prefer to defer.
|
|
+ */
|
|
+ if (!up.port.uartclk)
|
|
+ return -EPROBE_DEFER;
|
|
+
|
|
/* register the port */
|
|
ret = serial8250_register_8250_port(&up);
|
|
if (ret < 0) {
|