config TEGRA_CAR_CLOCK bool "Enable Tegra CAR-based clock driver" depends on TEGRA_CAR help Enable support for manipulating Tegra's on-SoC clocks via direct register access to the Tegra CAR (Clock And Reset controller). config TEGRA186_CLOCK bool "Enable Tegra186 BPMP-based clock driver" depends on TEGRA186_BPMP help Enable support for manipulating Tegra's on-SoC clocks via IPC requests to the BPMP (Boot and Power Management Processor).