static int max77843_muic_chg_handler()

in extcon-max77843.c [532:625]

• 82 lines of code
• 18 McCabe index (conditional complexity)

static int max77843_muic_chg_handler(struct max77843_muic_info *info)
{
	int ret, chg_type, gnd_type;
	bool attached;

	chg_type = max77843_muic_get_cable_type(info,
			MAX77843_CABLE_GROUP_CHG, &attached);

	dev_dbg(info->dev,
		"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
		attached ? "attached" : "detached",
		chg_type, info->prev_chg_type);

	switch (chg_type) {
	case MAX77843_MUIC_CHG_USB:
		ret = max77843_muic_set_path(info,
					     MAX77843_MUIC_CONTROL1_SW_USB,
					     attached, false);
		if (ret < 0)
			return ret;

		extcon_set_state_sync(info->edev, EXTCON_USB, attached);
		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
					attached);
		break;
	case MAX77843_MUIC_CHG_DOWNSTREAM:
		ret = max77843_muic_set_path(info,
					     MAX77843_MUIC_CONTROL1_SW_OPEN,
					     attached, false);
		if (ret < 0)
			return ret;

		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
					attached);
		break;
	case MAX77843_MUIC_CHG_DEDICATED:
		ret = max77843_muic_set_path(info,
					     MAX77843_MUIC_CONTROL1_SW_OPEN,
					     attached, false);
		if (ret < 0)
			return ret;

		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
					attached);
		break;
	case MAX77843_MUIC_CHG_SPECIAL_500MA:
		ret = max77843_muic_set_path(info,
					     MAX77843_MUIC_CONTROL1_SW_OPEN,
					     attached, false);
		if (ret < 0)
			return ret;

		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
					attached);
		break;
	case MAX77843_MUIC_CHG_SPECIAL_1A:
		ret = max77843_muic_set_path(info,
					     MAX77843_MUIC_CONTROL1_SW_OPEN,
					     attached, false);
		if (ret < 0)
			return ret;

		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
					attached);
		break;
	case MAX77843_MUIC_CHG_GND:
		gnd_type = max77843_muic_get_cable_type(info,
				MAX77843_CABLE_GROUP_ADC_GND, &attached);

		/* Charger cable on MHL accessory is attach or detach */
		if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
						true);
		else if (gnd_type == MAX77843_MUIC_GND_MHL)
			extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
						false);
		break;
	case MAX77843_MUIC_CHG_DOCK:
		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
		break;
	case MAX77843_MUIC_CHG_NONE:
		break;
	default:
		dev_err(info->dev,
			"failed to detect %s accessory (chg_type:0x%x)\n",
			attached ? "attached" : "detached", chg_type);

		max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
				       attached, false);
		return -EINVAL;
	}

	return 0;
}