Hi Fabio,
On 22/01/15 23:42, Fabio Estevam wrote:
Hi Graeme,
On Wed, Jan 21, 2015 at 9:55 AM, Graeme Russ <gr...@tss-engineering.com> wrote:
Section 4.1.2 of Freescale Application Note AN4199 describes the
configuration required to operate the mx28 from a 5V source without a
battery. This patch implements the changes to the Freescale bootlets
which allow this configuration to properly boot the mx28 processor
Signed-off-by: Graeme Russ <gr...@tss-engineering.com>
---
arch/arm/cpu/arm926ejs/mxs/spl_power_init.c | 190 +++++++++++++++++++++++++++-
doc/README.mxs | 10 ++
Damien posted today a new version of this patch in the imx community,
which is a lot simpler.
Could you please try it?
I've taken a look at it, but decided to leave this patch as-is. Here is
what I wrote on the Freescale forum:
~~~~
I'm going to keep my U-Boot patch mostly as-is for a few reasons:
- The patch disables battery voltage measurement when there is no battery
- The patch disables all code paths relating to booting from battery
- The power block configuration is based primarily on the Fressscale
bootlets which I think should be retained unless we can come up with
some pretty clear and convincing arguments as to why an alternative
approach is better
I think there is scope for some refactoring of the power block setup
code in U-Boot, but for now I think it best to leave it as close to the
bootlet code sequence as practical
~~~~
Regards,
Graeme
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