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Date:	Tue, 6 Oct 2015 11:57:46 +0000
From:	"Pallala, Ramakrishna" <ramakrishna.pallala@...el.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	"k.kozlowski@...sung.com" <k.kozlowski@...sung.com>,
	"ckeepax@...nsource.wolfsonmicro.com" 
	<ckeepax@...nsource.wolfsonmicro.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"rogerq@...com" <rogerq@...com>,
	"patches@...nsource.wolfsonmicro.com" 
	<patches@...nsource.wolfsonmicro.com>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>
Subject: RE: [PATCH 1/2] extcon: Modify the id and name of external connector

> >> diff --git a/include/linux/extcon.h b/include/linux/extcon.h index
> >> c0f8c4fc5d45..c8dd881e2b8d 100644
> >> --- a/include/linux/extcon.h
> >> +++ b/include/linux/extcon.h
> >> @@ -31,32 +31,42 @@
> >>  /*
> >>   * Define the unique id of supported external connectors
> >>   */
> >> -#define EXTCON_NONE			0
> >> -
> >> -#define EXTCON_USB			1	/* USB connector */
> >> -#define EXTCON_USB_HOST			2
> >> -
> >> -#define EXTCON_TA			3	/* Charger connector */
> >> -#define EXTCON_FAST_CHARGER		4
> >> -#define EXTCON_SLOW_CHARGER		5
> >> -#define EXTCON_CHARGE_DOWNSTREAM	6
> >> -
> >> -#define EXTCON_LINE_IN			7	/* Audio/Video
> >> connector */
> >> -#define EXTCON_LINE_OUT			8
> >> -#define EXTCON_MICROPHONE		9
> >> -#define EXTCON_HEADPHONE		10
> >> -#define EXTCON_HDMI			11
> >> -#define EXTCON_MHL			12
> >> -#define EXTCON_DVI			13
> >> -#define EXTCON_VGA			14
> >> -#define EXTCON_SPDIF_IN			15
> >> -#define EXTCON_SPDIF_OUT		16
> >> -#define EXTCON_VIDEO_IN			17
> >> -#define EXTCON_VIDEO_OUT		18
> >> -
> >> -#define EXTCON_DOCK			19	/* Misc connector */
> >> -#define EXTCON_JIG			20
> >> -#define EXTCON_MECHANICAL		21
> >> +#define EXTCON_NONE		0
> >> +
> >> +/* USB external connector */
> >> +#define EXTCON_USB		1	/* Universal Serial Bus */
> >> +#define EXTCON_USB_HOST		2
> >> +
> >> +/* Charging external connector */
> >> +#define EXTCON_CHG_USB		5	/* Standard Downstream Port
> >> */
> >> +#define EXTCON_CHG_USB_CDP	6	/* Charging Downstream Port
> >> */
> >> +#define EXTCON_CHG_USB_DCP	7	/* Dedicated Charging Port */
> >> +#define EXTCON_CHG_USB_DCP_FAST	8
> >> +#define EXTCON_CHG_USB_DCP_SLOW	9
> >> +#define EXTCON_CHG_USB_ACA	10	/* Accessory Charger Adapter
> >> */
> >> +
> >> +/* Jack external connector */
> >> +#define EXTCON_JACK_MICROPHONE	20
> >> +#define EXTCON_JACK_HEADPHONE	21
> >> +#define EXTCON_JACK_LINE_IN	22
> >> +#define EXTCON_JACK_LINE_OUT	23
> >> +#define EXTCON_JACK_VIDEO_IN	24
> >> +#define EXTCON_JACK_VIDEO_OUT	25
> >> +#define EXTCON_JACK_SPDIF_IN	26	/* Sony Philips Digital
> >> InterFace */
> >> +#define EXTCON_JACK_SPDIF_OUT	27
> >> +
> >> +/* Display external connector */
> >> +#define EXTCON_DISP_HDMI	40	/* High-Definition Multimedia
> >> Interface */
> >> +#define EXTCON_DISP_MHL		41	/* Mobile High-Definition Link
> >> */
> >> +#define EXTCON_DISP_DVI		42	/* Digital Visual Inteface */
> >> +#define EXTCON_DISP_VGA		43	/* Video Graphics Array */
> >> +
> >> +/* Miscellaneous external connector */
> >> +#define EXTCON_DOCK	60
> >> +#define EXTCON_JIG		61
> >> +#define EXTCON_MECHANICAL	62
> >> +
> >> +#define EXTCON_NUM		63
> >
> > Can we change the #define macro's to enum's? is there problem with that?
> 
> It is possible. But, the unique id of external connector will be used on device tree
> file as following patch[1]. Following patch[1] defines the include/dt-
> bindings/extcon/extcon.h
> which is include in *.dts file. In *.dts file, we can not use the 'enum'.
> [1] https://lkml.org/lkml/2015/10/5/38
> So, I use the "#define" keyword instead of enum.
> 
> I used the 'enum' on first patch to define the unique id but I altered it by using
> '#define' instead of 'enum' on following patch[2].
> [2] commit 73b6ecdb93e8e ("extcon: Redefine the unique id of supported
> external connectors without 'enum extcon' type")

Ok. Thanks.

-Ram

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