Re: [PATCH 1/4] ARM: multi_v7_defconfig: Enable common Rockchip devices/busses

[Andy Yan]

Hi
    There are also many other devices like display and mmc and even
the cpu(if the cpu want run a high frequency when boot up)need to
get power supply from PMIC, so it is better to load PMIC as early as
possible.Built-in is a better choice.

On 2015å09æ07æ 18:24, Sjoerd Simons wrote:
> On Mon, 2015-09-07 at 11:26 +0200, Javier Martinez Canillas wrote:
> > Hello Sjoerd,
> >
> > On 09/06/2015 10:16 PM, Sjoerd Simons wrote:
> > > Enable Rockchip I2C, SPI, PWM, thermal drivers.
> > >
> > > Builtin are:
> > >   * I2C as it often controls the pmic.
> > Having I2C as a module will cause more probe deferrals due missing
> > regulators and slow down the boot but it should not cause issues.
> > Or am I missing something?
> >
> > In fact, I think even the PMIC could be built as a module.
> It could in principle. However as a lot of other drivers do need the
> regulators provided by the pmic, they'll be deferred until that driver
> is loaded. So e.g. with the i2c/pmic drivers as a module you cannot
> boot to an NFS rootfs without using an initramfs.
>
> > But I don't have a strong opinion on this so patch looks good:
> >
> > Reviewed-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
> >
> > Best regards,


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