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 <reg> > > 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? -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
