From b6ced294fb61418e7d3fc30bac696f313551d412 Mon Sep 17 00:00:00 2001 From: Jarkko Nikula Date: Tue, 21 Jun 2016 13:21:34 +0300 Subject: 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 Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx.h | 9 --------- 1 file changed, 9 deletions(-) (limited to 'drivers/spi/spi-pxa2xx.h') diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index e6b0900..d217ad5 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); -- cgit v1.1