[U-Boot] [PATCH 07/12] imx:mx6 Support LDO bypass

[Fabio Estevam]

Hi Tim,

On Tue, Feb 10, 2015 at 12:50 PM, Tim Harvey <tharvey at gateworks.com> wrote:

> I think what you are trying to do here is to put the anatop regulators
> in bypass mode so that the Freescale vendor kernel leaves them
> bypassed (which is what the 3.10.x based vendor kernels supporting
> device-tree at http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git
> do). This is what the Freescale vendor U-Boot does and so they have
> created a horrible dependence between kernel and bootloader.

I agree.

> Instead you may be interested in what I did for our BSP's that use the
> Freescale vendor kernel. Instead of touching U-Boot, I look for the
> fsl,ldo-bypass node in the kernel and enable it just like their
> bootloader would have:
> https://github.com/Gateworks/linux-imx6/commit/a1af6ac6f00b4da7c8a5656e8ff093d4ab5cadee
>
> That said, I would love to see some help getting IMX6 ldo-bypass
> support upstream. All of our boards have an external PMIC and are

I want to help you on upstreaming ldo-bypass support in the kernel, Tim.

Can we do like your approach, but defining
imx_anatop_ldobypass_enable() inside
rivers/regulator/anatop-regulator.c instead?

Regards,

Fabio Estevam