diff options
Diffstat (limited to 'drivers/spi/spi-dw-mid.c')
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index 25c8fa7..4b4d266 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -207,12 +207,10 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws) return rxdesc; } -static void dw_spi_dma_setup(struct dw_spi *dws) +static int mid_spi_dma_setup(struct dw_spi *dws) { u16 dma_ctrl = 0; - spi_enable_chip(dws, 0); - dw_writew(dws, DW_SPI_DMARDLR, 0xf); dw_writew(dws, DW_SPI_DMATDLR, 0x10); @@ -222,21 +220,17 @@ static void dw_spi_dma_setup(struct dw_spi *dws) dma_ctrl |= SPI_DMA_RDMAE; dw_writew(dws, DW_SPI_DMACR, dma_ctrl); - spi_enable_chip(dws, 1); + return 0; } -static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change) +static int mid_spi_dma_transfer(struct dw_spi *dws) { struct dma_async_tx_descriptor *txdesc, *rxdesc; - /* 1. setup DMA related registers */ - if (cs_change) - dw_spi_dma_setup(dws); - - /* 2. Prepare the TX dma transfer */ + /* Prepare the TX dma transfer */ txdesc = dw_spi_dma_prepare_tx(dws); - /* 3. Prepare the RX dma transfer */ + /* Prepare the RX dma transfer */ rxdesc = dw_spi_dma_prepare_rx(dws); /* rx must be started before tx due to spi instinct */ @@ -258,6 +252,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change) static struct dw_spi_dma_ops mid_dma_ops = { .dma_init = mid_spi_dma_init, .dma_exit = mid_spi_dma_exit, + .dma_setup = mid_spi_dma_setup, .dma_transfer = mid_spi_dma_transfer, }; #endif |
