static int tegra_cpuidle_probe()

in cpuidle-tegra.c [338:383]

• 26 lines of code
• 8 McCabe index (conditional complexity)

static int tegra_cpuidle_probe(struct platform_device *pdev)
{
	if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NOT_READY)
		return -EPROBE_DEFER;

	/* LP2 could be disabled in device-tree */
	if (tegra_pmc_get_suspend_mode() < TEGRA_SUSPEND_LP2)
		tegra_cpuidle_disable_state(TEGRA_CC6);

	/*
	 * Required suspend-resume functionality, which is provided by the
	 * Tegra-arch core and PMC driver, is unavailable if PM-sleep option
	 * is disabled.
	 */
	if (!IS_ENABLED(CONFIG_PM_SLEEP)) {
		tegra_cpuidle_disable_state(TEGRA_C7);
		tegra_cpuidle_disable_state(TEGRA_CC6);
	}

	/*
	 * Generic WFI state (also known as C1 or LP3) and the coupled CPU
	 * cluster power-off (CC6 or LP2) states are common for all Tegra SoCs.
	 */
	switch (tegra_get_chip_id()) {
	case TEGRA20:
		/* Tegra20 isn't capable to power-off individual CPU cores */
		tegra_cpuidle_disable_state(TEGRA_C7);
		break;

	case TEGRA30:
		break;

	case TEGRA114:
	case TEGRA124:
		tegra_cpuidle_setup_tegra114_c7_state();

		/* coupled CC6 (LP2) state isn't implemented yet */
		tegra_cpuidle_disable_state(TEGRA_CC6);
		break;

	default:
		return -EINVAL;
	}

	return cpuidle_register(&tegra_idle_driver, cpu_possible_mask);
}