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spi/pl022: add PrimeCell generic DMA support

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This extends the PL022 SSP/SPI driver with generic DMA engine
support using the PrimeCell DMA engine interface. Also fix up the
test code for the U300 platform.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Linus Walleij 2010-09-29 17:31:35 +09:00 • committed by Grant Likely
parent cdbc8f042f
commit b1b6b9aa6f
2 changed files with 437 additions and 91 deletions
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6
include/linux/amba/pl022.h
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@ -228,6 +228,7 @@ enum ssp_chip_select {
};
struct dma_chan;
/**
* struct pl022_ssp_master - device.platform_data for SPI controller devices.
* @num_chipselect: chipselects are used to distinguish individual
@ -235,11 +236,16 @@ enum ssp_chip_select {
* each slave has a chipselect signal, but it's common that not
* every chipselect is connected to a slave.
* @enable_dma: if true enables DMA driven transfers.
* @dma_rx_param: parameter to locate an RX DMA channel.
* @dma_tx_param: parameter to locate a TX DMA channel.
*/
struct pl022_ssp_controller {
u16 bus_id;
u8 num_chipselect;
u8 enable_dma:1;
bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
void *dma_rx_param;
void *dma_tx_param;
};
/**