static int sysc_get_clocks()

in ti-sysc.c [425:493]

• 54 lines of code
• 16 McCabe index (conditional complexity)

static int sysc_get_clocks(struct sysc *ddata)
{
	struct device_node *np = ddata->dev->of_node;
	struct property *prop;
	const char *name;
	int nr_fck = 0, nr_ick = 0, i, error = 0;

	ddata->clock_roles = devm_kcalloc(ddata->dev,
					  SYSC_MAX_CLOCKS,
					  sizeof(*ddata->clock_roles),
					  GFP_KERNEL);
	if (!ddata->clock_roles)
		return -ENOMEM;

	of_property_for_each_string(np, "clock-names", prop, name) {
		if (!strncmp(clock_names[SYSC_FCK], name, 3))
			nr_fck++;
		if (!strncmp(clock_names[SYSC_ICK], name, 3))
			nr_ick++;
		ddata->clock_roles[ddata->nr_clocks] = name;
		ddata->nr_clocks++;
	}

	if (ddata->nr_clocks < 1)
		return 0;

	if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) {
		error = sysc_init_ext_opt_clock(ddata, NULL);
		if (error)
			return error;
	}

	if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
		dev_err(ddata->dev, "too many clocks for %pOF\n", np);

		return -EINVAL;
	}

	if (nr_fck > 1 || nr_ick > 1) {
		dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);

		return -EINVAL;
	}

	/* Always add a slot for main clocks fck and ick even if unused */
	if (!nr_fck)
		ddata->nr_clocks++;
	if (!nr_ick)
		ddata->nr_clocks++;

	ddata->clocks = devm_kcalloc(ddata->dev,
				     ddata->nr_clocks, sizeof(*ddata->clocks),
				     GFP_KERNEL);
	if (!ddata->clocks)
		return -ENOMEM;

	for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
		const char *name = ddata->clock_roles[i];

		if (!name)
			continue;

		error = sysc_get_one_clock(ddata, name);
		if (error)
			return error;
	}

	return 0;
}