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

Andy Yan andy.yan at rock-chips.com
Mon Sep 7 03:55:49 PDT 2015

     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 2015年09月07日 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 at osg.samsung.com>
>> Best regards,

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