linux-kernel - Re: [PATCH] extcon: Modify the id and name of external connector

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Date:	Mon, 5 Oct 2015 11:26:15 +0300
From:	Roger Quadros <rogerq@...com>
To:	Chanwoo Choi <cwchoi00@...il.com>, <linux-kernel@...r.kernel.org>
CC:	<k.kozlowski@...sung.com>, <ramakrishna.pallala@...el.com>,
	<gregkh@...uxfoundation.org>,
	<ckeepax@...nsource.wolfsonmicro.com>,
	<rf@...nsource.wolfsonmicro.com>,
	<patches@...nsource.wolfsonmicro.com>, <cw00.choi@...sung.com>,
	<myungjoo.ham@...sung.com>
Subject: Re: [PATCH] extcon: Modify the id and name of external connector

Chanwoo,

On 04/10/15 06:45, Chanwoo Choi wrote:
> This patch modifies the id and name of external connector with the additional
> prefix to clarify both attribute and meaning of external connector as following:
> - EXTCON_CHG_* mean the charger connector.
> - EXTCON_JACK_* mean the jack connector.
> - EXTCON_DISP_* mean the display port connector.
> 
> Following table show the new name of external connector with old name:
> -------------------------------------------------
> Old extcon name         | New extcon name       |
> -------------------------------------------------
> EXTCON_TA               | EXTCON_CHG_USB_DCP    |
> EXTCON_FAST_CHARGER     | EXTCON_CHG_USB_FAST   |
> EXTCON_SLOW_CHARGER     | EXTCON_CHG_USB_SLOW   |
> EXTCON_CHARGE_DOWNSTREAM| EXTCON_CHG_USB_CDP    |
> -------------------------------------------------
> EXTCON_MICROPHONE       | EXTCON_JACK_MICROPHONE|
> EXTCON_HEADPHONE        | EXTCON_JACK_HEADPHONE |
> EXTCON_LINE_IN          | EXTCON_JACK_LINE_IN   |
> EXTCON_LINE_OUT         | EXTCON_JACK_LINE_OUT  |
> EXTCON_VIDEO_IN         | EXTCON_JACK_VIDEO_IN  |
> EXTCON_VIDEO_OUT        | EXTCON_JACK_VIDEO_OUT |
> EXTCON_SPDIF_IN         | EXTCON_JACK_SPDIF_IN  |
> EXTCON_SPDIF_OUT        | EXTCON_JACK_SPDIF_OUT |
> -------------------------------------------------
> EXTCON_HMDI             | EXTCON_DISP_HDMI      |
> EXTCON_MHL              | EXTCON_DISP_MHL       |
> EXTCON_DVI              | EXTCON_DISP_DVI       |
> EXTCON_VGA              | EXTCON_DISP_VGA       |
> -------------------------------------------------
> 
> And, when altering the name of USB charger connector, EXTCON refers to the
> "USB battery charging specification"[1] to use the standard name of USB
> charging port as following. Following name of USB charging port are already used
> in power_supply subsystem. We chan check it on patch[2].
> - EXTCON_CHG_USB	/* Standard Downstream Port */
> - EXTCON_CHG_USB_DCP	/* Dedicated Charging Port */
> - EXTCON_CHG_USB_CDP	/* Charging Downstream Port */
> - EXTCON_CHG_USB_ACA	/* Accessory Charging Adapter */
> 
> [1] http://www.usb.org/developers/docs/devclass_docs/USB_Battery_Charging_1.2.pdf
> [2] commit 85efc8a18ce ("[PATCH] power_supply: Add types for USB chargers")
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> ---
>  drivers/extcon/extcon-arizona.c  | 18 ++++++------
>  drivers/extcon/extcon-axp288.c   | 12 ++++----
>  drivers/extcon/extcon-max14577.c | 18 ++++++------
>  drivers/extcon/extcon-max77693.c | 32 +++++++++++----------
>  drivers/extcon/extcon-max77843.c | 27 ++++++++++--------
>  drivers/extcon/extcon-max8997.c  | 21 +++++++-------
>  drivers/extcon/extcon-rt8973a.c  |  4 +--
>  drivers/extcon/extcon-sm5502.c   |  4 +--
>  drivers/extcon/extcon.c          | 60 ++++++++++++++++++++-------------------
>  include/linux/extcon.h           | 61 +++++++++++++++++++++++-----------------
>  10 files changed, 138 insertions(+), 119 deletions(-)
> 

<snip>

> diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
> index 8dd0af1..505a028 100644
> --- a/drivers/extcon/extcon.c
> +++ b/drivers/extcon/extcon.c
> @@ -39,37 +39,39 @@
>  #define CABLE_NAME_MAX		30
>  
>  static const char *extcon_name[] =  {
> -	[EXTCON_NONE]		= "NONE",
> +	[EXTCON_NONE]		= "EXTCON_NONE",
>  
>  	/* USB external connector */
> -	[EXTCON_USB]		= "USB",
> -	[EXTCON_USB_HOST]	= "USB-HOST",
> -
> -	/* Charger external connector */
> -	[EXTCON_TA]		= "TA",
> -	[EXTCON_FAST_CHARGER]	= "FAST-CHARGER",
> -	[EXTCON_SLOW_CHARGER]	= "SLOW-CHARGER",
> -	[EXTCON_CHARGE_DOWNSTREAM] = "CHARGE-DOWNSTREAM",
> -
> -	/* Audio/Video external connector */
> -	[EXTCON_LINE_IN]	= "LINE-IN",
> -	[EXTCON_LINE_OUT]	= "LINE-OUT",
> -	[EXTCON_MICROPHONE]	= "MICROPHONE",
> -	[EXTCON_HEADPHONE]	= "HEADPHONE",
> -
> -	[EXTCON_HDMI]		= "HDMI",
> -	[EXTCON_MHL]		= "MHL",
> -	[EXTCON_DVI]		= "DVI",
> -	[EXTCON_VGA]		= "VGA",
> -	[EXTCON_SPDIF_IN]	= "SPDIF-IN",
> -	[EXTCON_SPDIF_OUT]	= "SPDIF-OUT",
> -	[EXTCON_VIDEO_IN]	= "VIDEO-IN",
> -	[EXTCON_VIDEO_OUT]	= "VIDEO-OUT",
> -
> -	/* Etc external connector */
> -	[EXTCON_DOCK]		= "DOCK",
> -	[EXTCON_JIG]		= "JIG",
> -	[EXTCON_MECHANICAL]	= "MECHANICAL",
> +	[EXTCON_USB]		= "EXTCON_USB",
> +	[EXTCON_USB_HOST]	= "EXTCON_USB_HOST",
> +
> +	/* Charging external connector */
> +	[EXTCON_CHG_USB]	= "EXTCON_CHG_USB",
> +	[EXTCON_CHG_USB_FAST]	= "EXTCON_CHG_USB_FAST",
> +	[EXTCON_CHG_USB_SLOW]	= "EXTCON_CHG_USB_SLOW",

How does FAST & SLOW correlate to USB specifications?

> +	[EXTCON_CHG_USB_DCP]	= "EXTCON_CHG_USB_DCP",
> +	[EXTCON_CHG_USB_CDP]	= "EXTCON_CHG_USB_CDP",

What about USB ACA?

> +
> +	/* Jack external connector */
> +	[EXTCON_JACK_MICROPHONE] = "EXTCON_JACK_MICROPHONE",
> +	[EXTCON_JACK_HEADPHONE]	= "EXTCON_JACK_HEADPHONE",
> +	[EXTCON_JACK_LINE_IN]	= "EXTCON_JACK_LINE_IN",
> +	[EXTCON_JACK_LINE_OUT]	= "EXTCON_JACK_LINE_OUT",
> +	[EXTCON_JACK_VIDEO_IN]	= "EXTCON_JACK_VIDEO_IN",
> +	[EXTCON_JACK_VIDEO_OUT]	= "EXTCON_JACK_VIDEO_OUT",
> +	[EXTCON_JACK_SPDIF_IN]	= "EXTCON_JACK_SPDIF_IN",
> +	[EXTCON_JACK_SPDIF_OUT]	= "EXTCON_JACK_SPDIF_OUT",
> +
> +	/* Display external connector */
> +	[EXTCON_DISP_HDMI]	= "EXTCON_DISP_HDMI",
> +	[EXTCON_DISP_MHL]	= "EXTCON_DISP_MHL",
> +	[EXTCON_DISP_DVI]	= "EXTCON_DISP_DVI",
> +	[EXTCON_DISP_VGA]	= "EXTCON_DISP_VGA",
> +
> +	/* Miscellaneous external connector */
> +	[EXTCON_DOCK]		= "EXTCON_DOCK",
> +	[EXTCON_JIG]		= "EXTCON_JIG",
> +	[EXTCON_MECHANICAL]	= "EXTCON_MECHANICAL",
>  
>  	NULL,
>  };
> diff --git a/include/linux/extcon.h b/include/linux/extcon.h
> index c0f8c4f..6d5285c 100644
> --- a/include/linux/extcon.h
> +++ b/include/linux/extcon.h
> @@ -31,32 +31,41 @@
>  /*
>   * 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_FAST	6
> +#define EXTCON_CHG_USB_SLOW	7
> +#define EXTCON_CHG_USB_DCP	8	/* Dedicated Charging Port */
> +#define EXTCON_CHG_USB_CDP	9	/* Charging Downstream Port */
> +
> +/* 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
>  
>  struct extcon_cable;
>  
> 

cheers,
-roger
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