TEGRA_MUX_FUNCTION_SHIFT
reg &= ~(TEGRA_MUX_FUNCTION_MASK << TEGRA_MUX_FUNCTION_SHIFT);
TEGRA_MUX_FUNCTION_SHIFT;
reg &= ~(TEGRA_MUX_FUNCTION_MASK << TEGRA_MUX_FUNCTION_SHIFT);
TEGRA_MUX_FUNCTION_SHIFT;