From: Javier Martinez Canillas <javier@osg.samsung.com>
To: Sjoerd Simons <sjoerd.simons@collabora.co.uk>,
linux-rockchip@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org,
Heiko Stuebner <heiko@sntech.de>, Kukjin Kim <kgene@kernel.org>,
Krzysztof Kozlowski <k.kozlowski@samsung.com>,
Thierry Reding <treding@nvidia.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
linux-kernel@vger.kernel.org,
Russell King <linux@arm.linux.org.uk>,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
Arnd Bergmann <arnd@arndb.de>, Lee Jones <lee.jones@linaro.org>,
Olof Johansson <olof@lixom.net>, Ray Jui <rjui@broadcom.com>,
Stephen Warren <swarren@nvidia.com>
Subject: Re: [PATCH 1/4] ARM: multi_v7_defconfig: Enable common Rockchip devices/busses
Date: Mon, 7 Sep 2015 12:38:08 +0200 [thread overview]
Message-ID: <55ED6910.8010202@osg.samsung.com> (raw)
In-Reply-To: <1441621467.8778.26.camel@collabora.co.uk>
Hello Sjoerd,
On 09/07/2015 12:24 PM, 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.
>
Right, not needing an initramfs is certainly a good reason. If you could
add something like that in the commit message of patches 1/4 and 2/4 that
would be great.
Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America
WARNING: multiple messages have this Message-ID (diff)
From: javier@osg.samsung.com (Javier Martinez Canillas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/4] ARM: multi_v7_defconfig: Enable common Rockchip devices/busses
Date: Mon, 7 Sep 2015 12:38:08 +0200 [thread overview]
Message-ID: <55ED6910.8010202@osg.samsung.com> (raw)
In-Reply-To: <1441621467.8778.26.camel@collabora.co.uk>
Hello Sjoerd,
On 09/07/2015 12:24 PM, 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.
>
Right, not needing an initramfs is certainly a good reason. If you could
add something like that in the commit message of patches 1/4 and 2/4 that
would be great.
Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America
next prev parent reply other threads:[~2015-09-07 10:38 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-06 20:16 [PATCH 0/4] ARM: multi_v7_defconfig: Improve rockchip support Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-06 20:16 ` [PATCH 3/4] ARM: multi_v7_defconfig: Enable Rockchip display support Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-07 9:31 ` Javier Martinez Canillas
2015-09-07 9:31 ` Javier Martinez Canillas
[not found] ` <1441570566-14001-1-git-send-email-sjoerd.simons-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
2015-09-06 20:16 ` [PATCH 1/4] ARM: multi_v7_defconfig: Enable common Rockchip devices/busses Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-07 9:26 ` Javier Martinez Canillas
2015-09-07 9:26 ` Javier Martinez Canillas
2015-09-07 10:24 ` Sjoerd Simons
2015-09-07 10:24 ` Sjoerd Simons
2015-09-07 10:38 ` Javier Martinez Canillas [this message]
2015-09-07 10:38 ` Javier Martinez Canillas
2015-09-07 11:27 ` Thierry Reding
2015-09-07 11:27 ` Thierry Reding
2015-09-07 11:27 ` Thierry Reding
2015-09-07 10:55 ` Andy Yan
2015-09-07 10:55 ` Andy Yan
2015-09-07 11:06 ` Javier Martinez Canillas
2015-09-07 11:06 ` Javier Martinez Canillas
2015-09-06 20:16 ` [PATCH 2/4] ARM: multi_v7_defconfig: Enable ACT8865 PMIC driver Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-07 9:30 ` Javier Martinez Canillas
2015-09-07 9:30 ` Javier Martinez Canillas
[not found] ` <1441570566-14001-3-git-send-email-sjoerd.simons-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
2015-09-07 9:33 ` Heiko Stübner
2015-09-07 9:33 ` Heiko Stübner
2015-09-07 9:33 ` Heiko Stübner
2015-09-07 10:49 ` Andy Yan
2015-09-07 10:49 ` Andy Yan
2015-09-07 10:49 ` Andy Yan
2015-09-07 10:53 ` Heiko Stübner
2015-09-07 10:53 ` Heiko Stübner
2015-09-06 20:16 ` [PATCH 4/4] ARM: multi_v7_defconfig: Enable DW USB2 support and rockchip phy Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-06 20:16 ` Sjoerd Simons
2015-09-07 0:02 ` Krzysztof Kozlowski
2015-09-07 0:02 ` Krzysztof Kozlowski
2015-09-07 0:02 ` Krzysztof Kozlowski
2015-09-07 7:10 ` Sjoerd Simons
2015-09-07 7:10 ` Sjoerd Simons
2015-09-07 7:24 ` Krzysztof Kozlowski
2015-09-07 7:24 ` Krzysztof Kozlowski
[not found] ` <55ED3BC5.8050603-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2015-09-07 7:53 ` Heiko Stübner
2015-09-07 7:53 ` Heiko Stübner
2015-09-07 7:53 ` Heiko Stübner
2015-09-07 7:56 ` Krzysztof Kozlowski
2015-09-07 7:56 ` Krzysztof Kozlowski
2015-09-07 8:49 ` Sjoerd Simons
2015-09-07 8:49 ` Sjoerd Simons
2015-09-07 9:33 ` Javier Martinez Canillas
2015-09-07 9:33 ` Javier Martinez Canillas
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