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spi: mxs-spi: move to use generic DMA helper

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With the generic DMA device tree helper supported by mxs-dma driver,
client devices only need to call dma_request_slave_channel() for
requesting a DMA channel from dmaengine.

Since mxs is a DT only platform now, along with the changes, the non-DT
case handling in probe function also gets removed.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Shawn Guo
2013-02-26 11:07:32 +08:00
parent 0e91e434c8
commit 26aafa77df
3 changed files with 18 additions and 58 deletions
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4
include/linux/spi/mxs-spi.h
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@@ -24,7 +24,7 @@
#ifndef __LINUX_SPI_MXS_SPI_H__
#define __LINUX_SPI_MXS_SPI_H__
#include <linux/fsl/mxs-dma.h>
#include <linux/dmaengine.h>
#define ssp_is_old(host) ((host)->devid == IMX23_SSP)
@@ -137,9 +137,7 @@ struct mxs_ssp {
unsigned int clk_rate;
enum mxs_ssp_id devid;
int dma_channel;
struct dma_chan *dmach;
struct mxs_dma_data dma_data;
unsigned int dma_dir;
enum dma_transfer_direction slave_dirn;
u32 ssp_pio_words[SSP_PIO_NUM];