diff options
| author | Jarkko Nikula <jarkko.nikula@linux.intel.com> | 2016-06-21 13:21:34 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-06-21 20:44:48 +0300 |
| commit | b6ced294fb61418e7d3fc30bac696f313551d412 (patch) | |
| tree | 88220341a7d916b53e47710b62a16efc10423571 /drivers/spi/spi-pxa2xx.h | |
| parent | 2d7537d8f64184debed89a57aa7bea5d27b76a90 (diff) | |
| download | linux-b6ced294fb61418e7d3fc30bac696f313551d412.tar.xz | |
spi: pxa2xx: Switch to SPI core DMA mapping functionality
SPI core provides DMA mapping with scatterlists. Start using it instead
of own implementation in spi-pxa2xx. Major difference in addition to
bunch of removed boilerplate code is that SPI core does
mapping/unmapping for all transfers in a message before and after the
message sending where spi-pxa2xx did mapping/unmapping for each
transfers separately.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-pxa2xx.h')
| -rw-r--r-- | drivers/spi/spi-pxa2xx.h | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index e6b09000ff14..d217ad55cc12 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -50,12 +50,6 @@ struct driver_data { struct tasklet_struct pump_transfers; /* DMA engine support */ - struct dma_chan *rx_chan; - struct dma_chan *tx_chan; - struct sg_table rx_sgt; - struct sg_table tx_sgt; - int rx_nents; - int tx_nents; atomic_t dma_running; /* Current message transfer state info */ @@ -67,7 +61,6 @@ struct driver_data { void *tx_end; void *rx; void *rx_end; - int dma_mapped; u8 n_bytes; int (*write)(struct driver_data *drv_data); int (*read)(struct driver_data *drv_data); @@ -145,8 +138,6 @@ extern void *pxa2xx_spi_next_transfer(struct driver_data *drv_data); #define MAX_DMA_LEN SZ_64K #define DEFAULT_DMA_CR1 (SSCR1_TSRE | SSCR1_RSRE | SSCR1_TRAIL) -extern bool pxa2xx_spi_dma_is_possible(size_t len); -extern int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data); extern irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data); extern int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst); extern void pxa2xx_spi_dma_start(struct driver_data *drv_data); |