Thread (21 messages) 21 messages, 4 authors, 2019-08-09

Re: [PATCH 5/6] tty: serial: Add linflexuart driver for S32V234

From: Stefan-gabriel Mirea <hidden>
Date: 2019-08-09 09:57:19
Also in: linux-devicetree, linux-doc, linux-serial, lkml

On 8/9/2019 12:53 PM, Will Deacon wrote:
On Fri, Aug 09, 2019 at 09:45:40AM +0000, Stefan-gabriel Mirea wrote:
quoted
On 8/8/2019 8:17 PM, Will Deacon wrote:
quoted
On Thu, Aug 08, 2019 at 12:47:00PM +0000, Stefan-gabriel Mirea wrote:
quoted
On 8/8/2019 11:08 AM, Will Deacon wrote:
quoted
On Fri, Aug 02, 2019 at 07:47:23PM +0000, Stefan-gabriel Mirea wrote:
quoted
+             linflex,<addr>
+                     Use early console provided by Freescale LinFlex UART
+                     serial driver for NXP S32V234 SoCs. A valid base
+                     address must be provided, and the serial port must
+                     already be setup and configured.
Why isn't earlycon= sufficient for this?
"earlycon=" is not actually supported. I will fix this in the next
version by adding a /chosen/stdout-path to the dts. The compatible
string provided to OF_EARLYCON_DECLARE will also be changed from
"fsl,s32v234-linflexuart" to "fsl,s32-linflexuart" to match the one in
the device tree nodes. I missed this after importing a rename from our
codebase.

Should I remove this addition from kernel-parameters.txt after that?
Yes, if you can use earlycon instead, then you can drop your custom option
entirely and therefore there's no need to document it either.
Can you please clarify what you mean by "drop your custom option"? The
"linflex" option documented in the paragraph is the name of the
earlycon_id declared via "OF_EARLYCON_DECLARE(linflex, ...)". We have
not done anything particular to accept it in the parameter value.
My apologies, I completely misread your patch and thought your were adding
a *new* kernel parameter. Having looked at the context, I now see you're
adding a new earlycon option, which is what I was suggesting :)

By all means, please update the stdout-path, because then you can just pass
"earlycon" and things will work as expected.
No problem, I will submit the new version soon. Thank you!

Regards,
Stefan

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