Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755975AbcJRBQw (ORCPT ); Mon, 17 Oct 2016 21:16:52 -0400 Received: from mail-pa0-f67.google.com ([209.85.220.67]:33771 "EHLO mail-pa0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755607AbcJRBQn (ORCPT ); Mon, 17 Oct 2016 21:16:43 -0400 Date: Tue, 18 Oct 2016 09:16:15 +0800 From: Peter Chen To: "Rafael J. Wysocki" Cc: Peter Chen , gregkh@linuxfoundation.org, stern@rowland.harvard.edu, ulf.hansson@linaro.org, broonie@kernel.org, sre@kernel.org, robh+dt@kernel.org, shawnguo@kernel.org, dbaryshkov@gmail.com, heiko@sntech.de, linux-arm-kernel@lists.infradead.org, p.zabel@pengutronix.de, devicetree@vger.kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, linux-usb@vger.kernel.org, arnd@arndb.de, s.hauer@pengutronix.de, mail@maciej.szmigiero.name, troy.kisky@boundarydevices.com, festevam@gmail.com, oscar@naiandei.net, stephen.boyd@linaro.org, linux-pm@vger.kernel.org, stillcompiling@gmail.com, linux-kernel@vger.kernel.org, mka@chromium.org, vaibhav.hiremath@linaro.org Subject: Re: [PATCH v8 0/8] power: add power sequence library Message-ID: <20161018011615.GC1689@b29397-desktop> References: <1476413995-20361-1-git-send-email-peter.chen@nxp.com> <5097336.earU4jV2qd@vostro.rjw.lan> <20161017013058.GA1301@b29397-desktop> <5513671.XlE8bb9pVt@vostro.rjw.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5513671.XlE8bb9pVt@vostro.rjw.lan> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7390 Lines: 141 On Tue, Oct 18, 2016 at 02:35:38AM +0200, Rafael J. Wysocki wrote: > On Monday, October 17, 2016 09:30:59 AM Peter Chen wrote: > > On Fri, Oct 14, 2016 at 02:09:31PM +0200, Rafael J. Wysocki wrote: > > > On Friday, October 14, 2016 10:59:47 AM Peter Chen wrote: > > > > Hi all, > > > > > > > > This is a follow-up for my last power sequence framework patch set [1]. > > > > According to Rob Herring and Ulf Hansson's comments[2]. The kinds of > > > > power sequence instances will be added at postcore_initcall, the match > > > > criteria is compatible string first, if the compatible string is not > > > > matched between dts and library, it will try to use generic power sequence. > > > > > > > > The host driver just needs to call of_pwrseq_on/of_pwrseq_off > > > > if only one power sequence instance is needed, for more power sequences > > > > are used, using of_pwrseq_on_list/of_pwrseq_off_list instead (eg, USB hub driver). > > > > > > > > In future, if there are special power sequence requirements, the special > > > > power sequence library can be created. > > > > > > > > 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 related binding > > > > change is updated at patch [1/6], The udoo board changes were tested > > > > using my last power sequence patch set.[3] > > > > > > > > Except for hard-wired MMC and USB devices, I find the USB ULPI PHY also > > > > need to power on itself before it can be found by ULPI bus. > > > > > > > > [1] http://www.spinics.net/lists/linux-usb/msg142755.html > > > > [2] http://www.spinics.net/lists/linux-usb/msg143106.html > > > > [3] http://www.spinics.net/lists/linux-usb/msg142815.html > > > > > > > > Changes for v8: > > > > - Allocate one extra pwrseq instance if pwrseq_get has succeed, it can avoid > > > > preallocate instances problem which the number of instance is decided at > > > > compile time, thanks for Heiko Stuebner's suggestion [Patch 2/8] > > > > - Delete pwrseq_compatible_sample.c which is the demo purpose to show compatible > > > > match method. [Patch 2/8] > > > > - Add Maciej S. Szmigiero's tested-by. [Patch 7/8] > > > > > > > > Changes for v7: > > > > - Create kinds of power sequence instance at postcore_initcall, and match > > > > the instance with node using compatible string, the beneit of this is > > > > the host driver doesn't need to consider which pwrseq instance needs > > > > to be used, and pwrseq core will match it, however, it eats some memories > > > > if less power sequence instances are used. [Patch 2/8] > > > > - Add pwrseq_compatible_sample.c to test match pwrseq using device_id. [Patch 2/8] > > > > - Fix the comments Vaibhav Hiremath adds for error path for clock and do not > > > > use device_node for parameters at pwrseq_on. [Patch 2/8] > > > > - Simplify the caller to use power sequence, follows Alan's commnets [Patch 4/8] > > > > - Tested three pwrseq instances together using both specific compatible string and > > > > generic libraries. > > > > > > > > Changes for v6: > > > > - Add Matthias Kaehlcke's Reviewed-by and Tested-by. (patch [2/6]) > > > > - Change chipidea core of_node assignment for coming user. (patch [5/6]) > > > > - Applies Joshua Clayton's three dts changes for two boards, > > > > the USB device's reg has only #address-cells, but without #size-cells. > > > > > > > > Changes for v5: > > > > - Delete pwrseq_register/pwrseq_unregister, which is useless currently > > > > - Fix the linker error when the pwrseq user is compiled as module > > > > > > > > Changes for v4: > > > > - Create the patch on next-20160722 > > > > - Fix the of_node is not NULL after chipidea driver is unbinded [Patch 5/6] > > > > - Using more friendly wait method for reset gpio [Patch 2/6] > > > > - Support multiple input clocks [Patch 2/6] > > > > - Add Rob Herring's ack for DT changes > > > > - Add Joshua Clayton's Tested-by > > > > > > > > Changes for v3: > > > > - Delete "power-sequence" property at binding-doc, and change related code > > > > at both library and user code. > > > > - Change binding-doc example node name with Rob's comments > > > > - of_get_named_gpio_flags only gets the gpio, but without setting gpio flags, > > > > add additional code request gpio with proper gpio flags > > > > - Add Philipp Zabel's Ack and MAINTAINER's entry > > > > > > > > Changes for v2: > > > > - Delete "pwrseq" prefix and clock-names for properties at dt binding > > > > - Should use structure not but its pointer for kzalloc > > > > - Since chipidea core has no of_node, let core's of_node equals glue > > > > layer's at core's probe > > > > > > > > Joshua Clayton (2): > > > > ARM: dts: imx6qdl: Enable usb node children with > > > > ARM: dts: imx6q-evi: Fix onboard hub reset line > > > > > > > > Peter Chen (6): > > > > binding-doc: power: pwrseq-generic: add binding doc for generic power > > > > sequence library > > > > power: add power sequence library > > > > binding-doc: usb: usb-device: add optional properties for power > > > > sequence > > > > usb: core: add power sequence handling for USB devices > > > > usb: chipidea: let chipidea core device of_node equal's glue layer > > > > device of_node > > > > ARM: dts: imx6qdl-udoo.dtsi: fix onboard USB HUB property > > > > > > > > .../bindings/power/pwrseq/pwrseq-generic.txt | 48 ++++++ > > > > .../devicetree/bindings/usb/usb-device.txt | 10 +- > > > > MAINTAINERS | 9 + > > > > arch/arm/boot/dts/imx6q-evi.dts | 25 +-- > > > > arch/arm/boot/dts/imx6qdl-udoo.dtsi | 26 ++- > > > > arch/arm/boot/dts/imx6qdl.dtsi | 6 + > > > > drivers/power/Kconfig | 1 + > > > > drivers/power/Makefile | 1 + > > > > drivers/power/pwrseq/Kconfig | 19 ++ > > > > drivers/power/pwrseq/Makefile | 2 + > > > > drivers/power/pwrseq/core.c | 191 +++++++++++++++++++++ > > > > drivers/power/pwrseq/pwrseq_generic.c | 183 ++++++++++++++++++++ > > > > drivers/usb/chipidea/core.c | 27 ++- > > > > drivers/usb/core/hub.c | 41 ++++- > > > > drivers/usb/core/hub.h | 1 + > > > > include/linux/power/pwrseq.h | 72 ++++++++ > > > > 16 files changed, 621 insertions(+), 41 deletions(-) > > > > create mode 100644 Documentation/devicetree/bindings/power/pwrseq/pwrseq-generic.txt > > > > create mode 100644 drivers/power/pwrseq/Kconfig > > > > create mode 100644 drivers/power/pwrseq/Makefile > > > > create mode 100644 drivers/power/pwrseq/core.c > > > > create mode 100644 drivers/power/pwrseq/pwrseq_generic.c > > > > create mode 100644 include/linux/power/pwrseq.h > > > > > > Meta question: Who's the maintainer you are targetting this at? > > > > > > > Sebastian Reichel mentioned it is better through your tree. > > I could be the maintainer for it, and send "GIT PULL" for you > > through my git > > (https://git.kernel.org/cgit/linux/kernel/git/peter.chen/usb.git/) > > Is it ok for you? > > Let me review the series first. :-) > Thanks, Rafael. -- Best Regards, Peter Chen