PUD_PULL_DOWN
pud_val[PUD_PULL_DOWN] = S5P_PIN_PULL_DOWN;
pud_val[PUD_PULL_DOWN] = S3C_PIN_PULL_DOWN;
pud_val[PUD_PULL_DOWN] = EXYNOS_PIN_PID_PULL_DOWN;
value = drvdata->pud_val[PUD_PULL_DOWN];