linux-kernel - [PATCH 1/3] Documentation: kernel-parameters: Add uartclk to console=uart

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Message-ID: <20240912113616.1.Ic8770cb6e660110359b245808105e5310d3fa528@changeid>
Date: Thu, 12 Sep 2024 11:36:19 -0600
From: Raul E Rangel <rrangel@...omium.org>
To: linux-serial@...r.kernel.org
Cc: pmladek@...e.com,
	rafael.j.wysocki@...el.com,
	ribalda@...omium.org,
	Raul E Rangel <rrangel@...omium.org>,
	Adrian Ratiu <adrian.ratiu@...labora.com>,
	"Borislav Petkov (AMD)" <bp@...en8.de>,
	Ingo Molnar <mingo@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Xiongwei Song <xiongwei.song@...driver.com>,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] Documentation: kernel-parameters: Add uartclk to console=uart

The console=uartXXXXX parameter is just an alias for earlycon=uartXXXX.
This means it also accepts the uartclk parameter.

Signed-off-by: Raul E Rangel <rrangel@...omium.org>

---

 Documentation/admin-guide/kernel-parameters.txt | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index bc1036e73bc0b4..cd3d44db60457d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -788,20 +788,16 @@
 			Documentation/networking/netconsole.rst for an
 			alternative.
 
-		uart[8250],io,<addr>[,options]
-		uart[8250],mmio,<addr>[,options]
-		uart[8250],mmio16,<addr>[,options]
-		uart[8250],mmio32,<addr>[,options]
+		uart[8250],io,<addr>[,options[,uartclk]]
+		uart[8250],mmio,<addr>[,options[,uartclk]]
+		uart[8250],mmio16,<addr>[,options[,uartclk]]
+		uart[8250],mmio32,<addr>[,options[,uartclk]]
 		uart[8250],0x<addr>[,options]
 			Start an early, polled-mode console on the 8250/16550
 			UART at the specified I/O port or MMIO address,
 			switching to the matching ttyS device later.
-			MMIO inter-register address stride is either 8-bit
-			(mmio), 16-bit (mmio16), or 32-bit (mmio32).
-			If none of [io|mmio|mmio16|mmio32], <addr> is assumed
-			to be equivalent to 'mmio'. 'options' are specified in
-			the same format described for ttyS above; if unspecified,
-			the h/w is not re-initialized.
+
+			See the documentation for earlycon=uart
 
 		hvc<n>	Use the hypervisor console device <n>. This is for
 			both Xen and PowerPC hypervisors.
-- 
2.46.0.662.g92d0881bb0-goog