Hi Fabio,
On 22/01/15 23:42, Fabio Estevam wrote:
Hi Graeme,
On Wed, Jan 21, 2015 at 9:55 AM, Graeme Russ gruss@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 gruss@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