linux-kernel - RE: [RESEND PATCH v11 1/4] gadget: Introduce the usb charger framework

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Date:	Mon, 13 Jun 2016 15:13:11 +0000
From:	Jun Li <jun.li@....com>
To:	Baolin Wang <baolin.wang@...aro.org>,
	"balbi@...nel.org" <balbi@...nel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"sre@...nel.org" <sre@...nel.org>,
	"dbaryshkov@...il.com" <dbaryshkov@...il.com>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>
CC:	"robh@...nel.org" <robh@...nel.org>,
	"m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
	"ruslan.bilovol@...il.com" <ruslan.bilovol@...il.com>,
	"peter.chen@...escale.com" <peter.chen@...escale.com>,
	"stern@...land.harvard.edu" <stern@...land.harvard.edu>,
	"r.baldyga@...sung.com" <r.baldyga@...sung.com>,
	"yoshihiro.shimoda.uh@...esas.com" <yoshihiro.shimoda.uh@...esas.com>,
	"lee.jones@...aro.org" <lee.jones@...aro.org>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"ckeepax@...nsource.wolfsonmicro.com" 
	<ckeepax@...nsource.wolfsonmicro.com>,
	"patches@...nsource.wolfsonmicro.com" 
	<patches@...nsource.wolfsonmicro.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"device-mainlining@...ts.linuxfoundation.org" 
	<device-mainlining@...ts.linuxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RESEND PATCH v11 1/4] gadget: Introduce the usb charger
 framework

Hi

> -----Original Message-----
> From: linux-usb-owner@...r.kernel.org [mailto:linux-usb-
> owner@...r.kernel.org] On Behalf Of Baolin Wang
> Sent: Monday, June 13, 2016 4:47 PM
> To: balbi@...nel.org; gregkh@...uxfoundation.org; sre@...nel.org;
> dbaryshkov@...il.com; dwmw2@...radead.org
> Cc: robh@...nel.org; m.szyprowski@...sung.com; ruslan.bilovol@...il.com;
> peter.chen@...escale.com; stern@...land.harvard.edu; r.baldyga@...sung.com;
> yoshihiro.shimoda.uh@...esas.com; lee.jones@...aro.org; broonie@...nel.org;
> ckeepax@...nsource.wolfsonmicro.com; patches@...nsource.wolfsonmicro.com;
> baolin.wang@...aro.org; linux-pm@...r.kernel.org; linux-
> usb@...r.kernel.org; device-mainlining@...ts.linuxfoundation.org; linux-
> kernel@...r.kernel.org
> Subject: [RESEND PATCH v11 1/4] gadget: Introduce the usb charger
> framework
> 
> This patch introduces the usb charger driver based on usb gadget that
> makes an enhancement to a power driver. It works well in practice but that
> requires a system with suitable hardware.
> 
> The basic conception of the usb charger is that, when one usb charger is
> added or removed by reporting from the usb gadget state change or the
> extcon device state change, the usb charger will report to power user to
> set the current limitation.
> 
> The usb charger will register notifiees on the usb gadget or the extcon
> device to get notified the usb charger state. It also supplies the
> notification mechanism to userspace When the usb charger state is changed.
> 
> Power user will register a notifiee on the usb charger to get notified by
> status changes from the usb charger. It will report to power user to set
> the current limitation when detecting the usb charger is added or removed
> from extcon device state or usb gadget state.
> 
> This patch doesn't yet integrate with the gadget code, so some functions
> which rely on the 'gadget' are not completed, that will be implemented in
> the following patches.
> 
> Signed-off-by: Baolin Wang <baolin.wang@...aro.org>

Reviewed-by: Li Jun <jun.li@....com>
Tested-by: Li Jun <jun.li@....com>

> ---
>  drivers/usb/gadget/Kconfig       |    7 +
>  drivers/usb/gadget/udc/Makefile  |    1 +
>  drivers/usb/gadget/udc/charger.c |  770
> ++++++++++++++++++++++++++++++++++++++
>  include/linux/usb/charger.h      |  191 ++++++++++
>  include/uapi/linux/usb/charger.h |   31 ++
>  5 files changed, 1000 insertions(+)
>  create mode 100644 drivers/usb/gadget/udc/charger.c  create mode 100644
> include/linux/usb/charger.h  create mode 100644
> include/uapi/linux/usb/charger.h