diff options
| author | Vipin Kumar | 2012-03-14 07:17:18 +0100 |
|---|---|---|
| committer | David Woodhouse | 2012-03-27 02:00:24 +0200 |
| commit | 4774fb0a48aacfec206e6d54ecf58706f6a5320a (patch) | |
| tree | 073282f1f2514cb524019042fc081c62f5daec8c /include | |
| parent | mtd: nand/fsmc: Access the NAND device word by word whenever possible (diff) | |
| download | kernel-qcow2-linux-4774fb0a48aacfec206e6d54ecf58706f6a5320a.tar.gz kernel-qcow2-linux-4774fb0a48aacfec206e6d54ecf58706f6a5320a.tar.xz kernel-qcow2-linux-4774fb0a48aacfec206e6d54ecf58706f6a5320a.zip | |
mtd: nand/fsmc: Add DMA support
The fsmc_nand driver uses cpu to read/write onto the device. This is inefficient
because of two reasons
- the cpu gets locked on AHB bus while reading from NAND
- the cpu is unnecessarily used when dma can do the job
This patch adds the support for accessing the device through DMA
Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Reviewed-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mtd/fsmc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mtd/fsmc.h b/include/linux/mtd/fsmc.h index 1edd2b3ac38e..18f9127a6631 100644 --- a/include/linux/mtd/fsmc.h +++ b/include/linux/mtd/fsmc.h @@ -172,6 +172,10 @@ struct fsmc_nand_platform_data { enum access_mode mode; void (*select_bank)(uint32_t bank, uint32_t busw); + + /* priv structures for dma accesses */ + void *read_dma_priv; + void *write_dma_priv; }; extern int __init fsmc_nor_init(struct platform_device *pdev, |