static int idt82p33_enable_channel()

in ptp_idt82p33.c [878:933]

• 44 lines of code
• 7 McCabe index (conditional complexity)

static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index)
{
	struct idt82p33_channel *channel;
	int err;

	if (!(index < MAX_PHC_PLL))
		return -EINVAL;

	channel = &idt82p33->channel[index];

	err = idt82p33_channel_init(channel, index);
	if (err) {
		dev_err(&idt82p33->client->dev,
			"Channel_init failed in %s with err %d!\n",
			__func__, err);
		return err;
	}

	channel->idt82p33 = idt82p33;

	idt82p33_caps_init(&channel->caps);
	snprintf(channel->caps.name, sizeof(channel->caps.name),
		 "IDT 82P33 PLL%u", index);

	channel->ptp_clock = ptp_clock_register(&channel->caps, NULL);

	if (IS_ERR(channel->ptp_clock)) {
		err = PTR_ERR(channel->ptp_clock);
		channel->ptp_clock = NULL;
		return err;
	}

	if (!channel->ptp_clock)
		return -ENOTSUPP;

	err = idt82p33_dpll_set_mode(channel, PLL_MODE_DCO);
	if (err) {
		dev_err(&idt82p33->client->dev,
			"Dpll_set_mode failed in %s with err %d!\n",
			__func__, err);
		return err;
	}

	err = idt82p33_enable_tod(channel);
	if (err) {
		dev_err(&idt82p33->client->dev,
			"Enable_tod failed in %s with err %d!\n",
			__func__, err);
		return err;
	}

	dev_info(&idt82p33->client->dev, "PLL%d registered as ptp%d\n",
		 index, channel->ptp_clock->index);

	return 0;
}