From: Peter Chen <hzpeterchen@gmail.com>
To: "Maciej S. Szmigiero" <mail@maciej.szmigiero.name>
Cc: mark.rutland@arm.com, Peter Chen <peter.chen@nxp.com>,
ulf.hansson@linaro.org, stephen.boyd@linaro.org,
k.kozlowski@samsung.com, festevam@gmail.com, pawel.moll@arm.com,
javier@osg.samsung.com, stern@rowland.harvard.edu,
devicetree@vger.kernel.org, arnd@arndb.de,
linux-pm@vger.kernel.org, s.hauer@pengutronix.de,
troy.kisky@boundarydevices.com, robh+dt@kernel.org,
linux-arm-kernel@lists.infradead.org, oscar@naiandei.net,
gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
linux-mmc@vger.kernel.org, sre@kernel.org, broonie@kernel.org,
p.zabel@pengutronix.de
Subject: Re: [PATCH 00/12] power: add generic power sequence framework
Date: Mon, 20 Jun 2016 19:27:37 +0800 [thread overview]
Message-ID: <20160620112737.GB26936@shlinux2> (raw)
In-Reply-To: <576487C1.5050807@maciej.szmigiero.name>
On Sat, Jun 18, 2016 at 01:29:05AM +0200, Maciej S. Szmigiero wrote:
> Hi Peter,
>
> On 17.06.2016 12:09, Peter Chen wrote:
> > Hi all,
> >
> > We have an well-known problem that the device needs to do some power
> > sequence before it can be recognized by related host, the typical
> > example like hard-wired mmc devices and usb devices. This power
> > sequence is hard to be described at device tree and handled by
> > related host driver, so we have created a common power sequence
> > framework to handle this requirement. The generic code is supplied
> > some common helpers from host driver, and individual power sequence
> > driver handles kinds of power sequence for devices.
> >
> > Since the MMC has already done the similar things, and this power
> > sequence handling can be generic, we use mmc power sequence code
> > as base to create this framework.
> >
> > This patch set is based on Krzysztof Kozlowski's RFC patch set (v4.7-rc1)
> > [1], and making some changes which can let it be generic. After that,
> > we create a generic power sequence driver for USB devices which handles
> > below things, it includes all input signals for devices I can consider.
> >
> > - Clock and its frequencies
> > - GPIO for reset and the duration time
> > - GPIO for enable
> > - Regulator for power
> >
> > This patch set is tested on i.mx6 sabresx evk using a dts change, I use
> > two hot-plug devices to simulate this use case. The udoo board changes
> > were tested using my last power sequence patch set. [2]
> >
> > @Maciej S. Szmigiero, Oscar, would you please test them on imx6qdl udoo
> > boards?
>
> Thanks for the patch set, just tested them on my UDOO Quad board and can
> confirm that USB and on-board hub work fine.
>
> Tested-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
>
> Maciej
>
Many thanks, Maciej.
--
Best Regards,
Peter Chen
prev parent reply other threads:[~2016-06-20 11:27 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 10:09 [PATCH 00/12] power: add generic power sequence framework Peter Chen
2016-06-17 10:09 ` [PATCH 01/12] power/mmc: Move pwrseq drivers to power/pwrseq Peter Chen
2016-06-17 10:09 ` [PATCH 02/12] MAINTAINERS: Retain Ulf Hansson as the same maintainer of pwrseq Peter Chen
2016-06-17 10:09 ` [PATCH 03/12] power: pwrseq: Enable COMPILE_TEST for drivers Peter Chen
2016-06-17 10:09 ` [PATCH 05/12] power: pwrseq: Generalize mmc_pwrseq operations by removing mmc prefix Peter Chen
2016-06-17 10:09 ` [PATCH 06/12] power: pwrseq: change common helpers as generic Peter Chen
2016-06-17 10:09 ` [PATCH 07/12] power: pwrseq: rename file name for generic driver Peter Chen
2016-06-20 12:48 ` Krzysztof Kozlowski
2016-06-21 2:19 ` Peter Chen
2016-06-17 10:09 ` [PATCH 09/12] power: pwrseq: pwrseq_usb_generic: add generic power sequence support for USB deivces Peter Chen
[not found] ` <1466158165-9380-1-git-send-email-peter.chen-3arQi8VN3Tc@public.gmane.org>
2016-06-17 10:09 ` [PATCH 04/12] power: pwrseq: Remove mmc prefix from mmc_pwrseq Peter Chen
2016-06-17 10:09 ` [PATCH 08/12] doc: binding: pwrseq-usb-generic: add binding doc for generic usb power sequence driver Peter Chen
2016-06-17 17:16 ` Rob Herring
2016-06-20 11:26 ` Peter Chen
2016-06-20 12:29 ` Chen-Yu Tsai
2016-06-21 2:14 ` Peter Chen
2016-06-20 16:16 ` Rob Herring
2016-06-20 17:06 ` Mark Brown
2016-06-21 2:11 ` Peter Chen
2016-06-21 21:26 ` Rob Herring
2016-06-22 1:14 ` Peter Chen
2016-06-22 9:09 ` Ulf Hansson
2016-06-24 15:25 ` Rob Herring
2016-06-17 10:09 ` [PATCH 10/12] usb: core: add power sequence handling for USB devices Peter Chen
[not found] ` <1466158165-9380-11-git-send-email-peter.chen-3arQi8VN3Tc@public.gmane.org>
2016-06-17 16:12 ` Alan Stern
2016-06-17 10:09 ` [PATCH 12/12] ARM: dts: imx6qdl-udoo.dtsi: fix onboard USB HUB property Peter Chen
2016-06-17 10:09 ` [PATCH 11/12] usb: chipidea: host: let the hcd know's parent device node Peter Chen
2016-06-17 23:29 ` [PATCH 00/12] power: add generic power sequence framework Maciej S. Szmigiero
2016-06-20 11:27 ` Peter Chen [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160620112737.GB26936@shlinux2 \
--to=hzpeterchen@gmail.com \
--cc=arnd@arndb.de \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=festevam@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=javier@osg.samsung.com \
--cc=k.kozlowski@samsung.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-mmc@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mail@maciej.szmigiero.name \
--cc=mark.rutland@arm.com \
--cc=oscar@naiandei.net \
--cc=p.zabel@pengutronix.de \
--cc=pawel.moll@arm.com \
--cc=peter.chen@nxp.com \
--cc=robh+dt@kernel.org \
--cc=s.hauer@pengutronix.de \
--cc=sre@kernel.org \
--cc=stephen.boyd@linaro.org \
--cc=stern@rowland.harvard.edu \
--cc=troy.kisky@boundarydevices.com \
--cc=ulf.hansson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).