|
 |
984fc80 |
From: Mark Salter <msalter@redhat.com>
|
|
|
984fc80 |
Date: Wed, 25 Mar 2015 14:17:50 -0400
|
|
|
2aa3606 |
Subject: [PATCH] arm64: avoid needing console= to enable serial console
|
|
|
984fc80 |
|
|
|
984fc80 |
Tell kernel to prefer one of the serial ports for console on
|
|
|
984fc80 |
platforms currently supported (pl011 or 8250). console= on
|
|
|
984fc80 |
command line will override these assumed preferences. This is
|
|
|
984fc80 |
just a hack to get the behavior we want from DT provided by
|
|
|
984fc80 |
firmware.
|
|
|
984fc80 |
|
|
|
984fc80 |
Signed-off-by: Mark Salter <msalter@redhat.com>
|
|
|
984fc80 |
---
|
|
|
984fc80 |
arch/arm64/kernel/setup.c | 19 +++++++++++++++++++
|
|
|
984fc80 |
1 file changed, 19 insertions(+)
|
|
|
984fc80 |
|
|
|
984fc80 |
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
|
|
|
6a7da49 |
index 74753132c3ac..3cc99d7c2361 100644
|
|
|
984fc80 |
--- a/arch/arm64/kernel/setup.c
|
|
|
984fc80 |
+++ b/arch/arm64/kernel/setup.c
|
|
|
6a7da49 |
@@ -579,3 +579,22 @@ const struct seq_operations cpuinfo_op = {
|
|
|
984fc80 |
.stop = c_stop,
|
|
|
984fc80 |
.show = c_show
|
|
|
984fc80 |
};
|
|
|
984fc80 |
+
|
|
|
984fc80 |
+/*
|
|
|
984fc80 |
+ * Temporary hack to avoid need for console= on command line
|
|
|
984fc80 |
+ */
|
|
|
984fc80 |
+static int __init arm64_console_setup(void)
|
|
|
984fc80 |
+{
|
|
|
984fc80 |
+ /* Allow cmdline to override our assumed preferences */
|
|
|
984fc80 |
+ if (console_set_on_cmdline)
|
|
|
984fc80 |
+ return 0;
|
|
|
984fc80 |
+
|
|
|
984fc80 |
+ if (IS_ENABLED(CONFIG_SERIAL_AMBA_PL011))
|
|
|
984fc80 |
+ add_preferred_console("ttyAMA", 0, "115200");
|
|
|
984fc80 |
+
|
|
|
984fc80 |
+ if (IS_ENABLED(CONFIG_SERIAL_8250))
|
|
|
984fc80 |
+ add_preferred_console("ttyS", 0, "115200");
|
|
|
984fc80 |
+
|
|
|
984fc80 |
+ return 0;
|
|
|
984fc80 |
+}
|
|
|
984fc80 |
+early_initcall(arm64_console_setup);
|