WM831X_GPN_PULL_SHIFT
#define WM831X_GPIO_PULL_NONE (0 << WM831X_GPN_PULL_SHIFT)
#define WM831X_GPIO_PULL_DOWN (1 << WM831X_GPN_PULL_SHIFT)
#define WM831X_GPIO_PULL_UP (2 << WM831X_GPN_PULL_SHIFT)