linux-kernel - Re: [PATCH v4 00/11] Earlycon cleanup

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Message-ID: <CAL_JsqKmXtUg+QspirBQw80bh7GC4JnrUZojrY0-twzpE-xeVw@mail.gmail.com>
Date:	Tue, 12 Jan 2016 17:52:58 -0600
From:	Rob Herring <robh+dt@...nel.org>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Grant Likely <grant.likely@...aro.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kevin Cernekee <cernekee@...il.com>,
	Jon Hunter <jonathanh@...dia.com>,
	Sebastian Frias <sf84@...oste.net>,
	Paul Burton <paul.burton@...tec.com>
Subject: Re: [PATCH v4 00/11] Earlycon cleanup

On Tue, Jan 12, 2016 at 1:41 PM, Peter Hurley <peter@...leysoftware.com> wrote:
> Hi Greg, Grant & Rob,
>
> This patch series is a rebase of the v3 from April last year.
>
> This patch series builds on my earlier "Extensible console matching &
> direct earlycon" to add several useful features to earlycon:
> * Proper port i/o configuration from DT node with of_serial properties
>   (such as reg-io-width, reg-shift and reg-offset, and endianness)
> * Proper console name & index initialization from earlycon name
>   (for both command line and DT-defined earlycons)
> * Support for DT 'stdout-path' options pass-through to earlycon setup
> * Improved log messages for troubleshooting
> * Support for multiple OF earlycon declarations so different
>   compatible strings can specify the same OF earlycon
>
> * Changes from v3
>   - Added 32-bit big-endian support
>   - Removed the omap8250 earlycon (will follow later)
>
>
> Rob has expressed a desire to have the DT parts live in drivers/of/fdt.c
> The problem with this approach is two-fold. Firstly, the number of required
> parameters quickly becomes ugly (base address, io reg width, io reg offset,
> io reg stride, endianness, earlycon name). Secondly, drivers are already
> requiring access to alternate DT properties, like clocks, to initialize
> earlycons, and this requirement will continue.

I dislike ugliness more. So other than my one nit, for the series:

Acked-by: Rob Herring <robh@...nel.org>