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spi: pxa2xx: Remove rx_/tx_map_len members from struct driver_data 

spi-pxa2xx-dma.c DMA engine implementation stopped using PIO for
unaligned trailing bytes in the commit 111e0a9dc7 ("spi/pxa2xx: Prevent
DMA from transferring too many bytes"). This means there is no need to
update tx/rx transfer buffer pointers after DMA completion. These buffer
pointers will be set to new buffers when handling the next transfer.

Because this buffer pointer update was only remaining use for rx_map_len
and tx_map_len members in struct driver_data after removing the legacy PXA
DMA implementation they can be removed now.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jarkko Nikula 2016-03-24 15:35:43 +02:00 committed by Mark Brown
parent 7d1f1bf699
commit 68335ec76e
2 changed files with 0 additions and 7 deletions
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5
drivers/spi/spi-pxa2xx-dma.c
View File

@ -33,12 +33,10 @@ static int pxa2xx_spi_map_dma_buffer(struct driver_data *drv_data,
dmadev = drv_data->tx_chan->device->dev;
sgt = &drv_data->tx_sgt;
buf = drv_data->tx;
drv_data->tx_map_len = len;
} else {
dmadev = drv_data->rx_chan->device->dev;
sgt = &drv_data->rx_sgt;
buf = drv_data->rx;
drv_data->rx_map_len = len;
}
nents = DIV_ROUND_UP(len, SZ_2K);
@ -133,9 +131,6 @@ static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data,
if (!error) {
pxa2xx_spi_unmap_dma_buffers(drv_data);
drv_data->tx += drv_data->tx_map_len;
drv_data->rx += drv_data->rx_map_len;
msg->actual_length += drv_data->len;
msg->state = pxa2xx_spi_next_transfer(drv_data);
} else {

2
drivers/spi/spi-pxa2xx.h
View File

@ -69,8 +69,6 @@ struct driver_data {
void *rx;
void *rx_end;
int dma_mapped;
size_t rx_map_len;
size_t tx_map_len;
u8 n_bytes;
int (*write)(struct driver_data *drv_data);
int (*read)(struct driver_data *drv_data);