FLASH_DMA_CTRL
[FLASH_DMA_CTRL] = 0x08,
[FLASH_DMA_CTRL] = 0x0c,
[FLASH_DMA_CTRL] = 0x10,
flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0x03); /* wake | run */
flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0); /* force stop */