CNNE_REG
writel(mask, bank->reg_base + PIC32_CLR(CNNE_REG));
writel(mask, bank->reg_base + PIC32_SET(CNNE_REG));
writel(mask, bank->reg_base + PIC32_SET(CNNE_REG));
cnne_fall = readl(bank->reg_base + CNNE_REG);