Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 06bed0af authored by Chanwoo Choi's avatar Chanwoo Choi
Browse files

extcon: max77693: Add support MHL_TA cable for charging battery 



This patch support MHL_TA cable for charging battery. The MHL_TA
cable include MHL with TA cable or MHL with micro USB cable. When
MHL with TA/USB cable is attached, extcon-max77693 driver detect
two interrupt for handling precise operation according to each cable
(MHL and TA/USB cable).

Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarMyungjoo Ham <myungjoo.ham@samsung.com>
parent 154f757f

drivers/extcon/extcon-max77693.c

+45 −11
Original line number Diff line number Diff line
@@ -136,9 +136,11 @@ enum max77693_muic_acc_type { 


	/* The below accessories have same ADC value so ADCLow and

	   ADC1K bit is used to separate specific accessory */

	MAX77693_MUIC_GND_USB_OTG = 0x100,	/* ADC:0x0, ADCLow:0, ADC1K:0 */

	MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */

	MAX77693_MUIC_GND_MHL_CABLE = 0x103,	/* ADC:0x0, ADCLow:1, ADC1K:1 */

	MAX77693_MUIC_GND_USB_OTG = 0x100,	/* ADC:0x0, VBVolot:0, ADCLow:0, ADC1K:0 */

	MAX77693_MUIC_GND_USB_OTG_VB = 0x104,	/* ADC:0x0, VBVolot:1, ADCLow:0, ADC1K:0 */

	MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:0 */

	MAX77693_MUIC_GND_MHL = 0x103,		/* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:1 */

	MAX77693_MUIC_GND_MHL_VB = 0x107,	/* ADC:0x0, VBVolot:1, ADCLow:1, ADC1K:1 */

};



/* MAX77693 MUIC device support below list of accessories(external connector) */
@@ -150,6 +152,7 @@ enum { 
	EXTCON_CABLE_SLOW_CHARGER,

	EXTCON_CABLE_CHARGE_DOWNSTREAM,

	EXTCON_CABLE_MHL,

	EXTCON_CABLE_MHL_TA,

	EXTCON_CABLE_AUDIO_VIDEO_LOAD,

	EXTCON_CABLE_AUDIO_VIDEO_NOLOAD,

	EXTCON_CABLE_JIG,
@@ -165,6 +168,7 @@ const char *max77693_extcon_cable[] = { 
	[EXTCON_CABLE_SLOW_CHARGER]		= "Slow-charger",

	[EXTCON_CABLE_CHARGE_DOWNSTREAM]	= "Charge-downstream",

	[EXTCON_CABLE_MHL]			= "MHL",

	[EXTCON_CABLE_MHL_TA]			= "MHL_TA",

	[EXTCON_CABLE_AUDIO_VIDEO_LOAD]		= "Audio-video-load",

	[EXTCON_CABLE_AUDIO_VIDEO_NOLOAD]	= "Audio-video-noload",

	[EXTCON_CABLE_JIG]			= "JIG",
@@ -330,6 +334,7 @@ static int max77693_muic_get_cable_type(struct max77693_muic_info *info, 
			/**

			 * [0x1][VBVolt][ADCLow][ADC1K]

			 * [0x1    0	   0       0  ]	: USB_OTG

			 * [0x1    1	   0       0  ]	: USB_OTG_VB

			 * [0x1    0       1       0  ] : Audio Video Cable with load

			 * [0x1    0       1       1  ] : MHL without charging connector

			 * [0x1    1       1       1  ] : MHL with charging connector
@@ -414,22 +419,24 @@ static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) 


	switch (cable_type_gnd) {

	case MAX77693_MUIC_GND_USB_OTG:

		/* USB_OTG */

	case MAX77693_MUIC_GND_USB_OTG_VB:

		/* USB_OTG, PATH: AP_USB */

		ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);

		if (ret < 0)

			goto out;

		extcon_set_cable_state(info->edev, "USB-Host", attached);

		break;

	case MAX77693_MUIC_GND_AV_CABLE_LOAD:

		/* Audio Video Cable with load */

		/* Audio Video Cable with load, PATH:AUDIO */

		ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);

		if (ret < 0)

			goto out;

		extcon_set_cable_state(info->edev,

				"Audio-video-load", attached);

		break;

	case MAX77693_MUIC_GND_MHL_CABLE:

		/* MHL */

	case MAX77693_MUIC_GND_MHL:

	case MAX77693_MUIC_GND_MHL_VB:

		/* MHL or MHL with USB/TA cable */

		extcon_set_cable_state(info->edev, "MHL", attached);

		break;

	default:
@@ -528,7 +535,9 @@ static int max77693_muic_adc_handler(struct max77693_muic_info *info) 
static int max77693_muic_chg_handler(struct max77693_muic_info *info)

{

	int chg_type;

	int cable_type_gnd;

	bool attached;

	bool cable_attached;

	int ret = 0;



	chg_type = max77693_muic_get_cable_type(info,
@@ -541,10 +550,35 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info) 


	switch (chg_type) {

	case MAX77693_CHARGER_TYPE_USB:

		ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);

		cable_type_gnd = max77693_muic_get_cable_type(info,

					MAX77693_CABLE_GROUP_ADC_GND,

					&cable_attached);



		switch (cable_type_gnd) {

		case MAX77693_MUIC_GND_MHL:

		case MAX77693_MUIC_GND_MHL_VB:

			/*

			 * USB/TA with MHL cable

			 * - MHL cable, which connect micro USB or TA cable,

			 * is used to charging battery. So, extcon driver check

			 * charging type whether micro USB or TA cable is

			 * connected to MHL cable when extcon driver detect MHL

			 * cable.

			 */

			extcon_set_cable_state(info->edev, "MHL_TA", attached);



			if (!cable_attached)

				extcon_set_cable_state(info->edev,

						"MHL", false);

			break;

		default:

			/* Only USB cable, PATH:AP_USB */

			ret = max77693_muic_set_path(info, CONTROL1_SW_USB,

						attached);

			if (ret < 0)

				goto out;

			extcon_set_cable_state(info->edev, "USB", attached);

		}

		break;

	case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:

		extcon_set_cable_state(info->edev,