Commit e3f60329 authored by Nikita Travkin's avatar Nikita Travkin Committed by Chanwoo Choi
Browse files

extcon: sm5502: Detect OTG when USB_ID is connected to ground 



In it's curent state this driver ignores OTG adapters with ID pin
connected to ground. This commit adds a check to set extcon into
host mode when such OTG adapter is connected.

Signed-off-by: default avatarNikita Travkin <nikitos.tr@gmail.com>
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent 17e8ff01

drivers/extcon/extcon-sm5502.c

+20 −2
Original line number Diff line number Diff line
@@ -144,6 +144,7 @@ enum sm5502_muic_acc_type { 
	SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e,	/* |      001|11110| */

	SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,	/* |      010|11110| */

							/* |Dev Type1|--ADC| */

	SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80,		/* |      100|00000| */

	SM5502_MUIC_ADC_OPEN_USB = 0x5f,		/* |      010|11111| */

	SM5502_MUIC_ADC_OPEN_TA = 0xdf,			/* |      110|11111| */

	SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,		/* |      111|11111| */
@@ -291,11 +292,27 @@ static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) 
	 * connected with to MUIC device.

	 */

	cable_type = adc & SM5502_REG_ADC_MASK;

	if (cable_type == SM5502_MUIC_ADC_GROUND)

		return SM5502_MUIC_ADC_GROUND;



	switch (cable_type) {

	case SM5502_MUIC_ADC_GROUND:

		ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,

				  &dev_type1);

		if (ret) {

			dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");

			return ret;

		}



		switch (dev_type1) {

		case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:

			cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;

			break;

		default:

			dev_dbg(info->dev,

				"cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",

				adc, dev_type1);

			return -EINVAL;

		}

		break;

	case SM5502_MUIC_ADC_SEND_END_BUTTON:

	case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:

	case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
@@ -396,6 +413,7 @@ static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 
		con_sw	= DM_DP_SWITCH_OPEN;

		vbus_sw	= VBUSIN_SWITCH_VBUSOUT;

		break;

	case SM5502_MUIC_ADC_GROUND_USB_OTG:

	case SM5502_MUIC_ADC_OPEN_USB_OTG:

		id	= EXTCON_USB_HOST;

		con_sw	= DM_DP_SWITCH_USB;