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mmc: dw_mmc: correct outdated comment for use_dma 

Since commit 3fc7eaef44 ("mmc: dw_mmc: Add external dma interface
support") use_dma no longer means only the data transfer mode, and
includes dma transmission channel. So make it more clear.

Signed-off-by: Ziyuan <ziyuan.biubiu@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ziyuan 2017-08-30 10:58:21 +08:00 committed by Ulf Hansson
parent c7ddaa2ec9
commit 2afcbdb0d8
1 changed files with 2 additions and 1 deletions
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drivers/mmc/host/dw_mmc.h
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@ -74,7 +74,8 @@ struct dw_mci_dma_slave {
* @stop_abort: The command currently prepared for stoping transfer.
* @prev_blksz: The former transfer blksz record.
* @timing: Record of current ios timing.
* @use_dma: Whether DMA channel is initialized or not.
* @use_dma: Which DMA channel is in use for the current transfer, zero
* denotes PIO mode.
* @using_dma: Whether DMA is in use for the current transfer.
* @dma_64bit_address: Whether DMA supports 64-bit address mode or not.
* @sg_dma: Bus address of DMA buffer.