PULL_DOWN
#define PULL_DOWN (0 << PULLTYPESEL_SHIFT | PULL_ENABLE)
#define PULL_DOWN (1 << 3)
#define PULL_DOWN BIT(6)
#define PULL_DOWN (1 << 1)
#define PULL_DOWN (0 << PULLTYPESEL_SHIFT | PULL_ENABLE)
#define PULL_DOWN (1 << 1)