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| author |   Linus Walleij <linus.walleij@linaro.org> | 2010-08-13 11:31:59 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2011-03-14 14:05:13 +0100 |
| commit | ec8f12533b4a439a8feb0d1a3bf15516781804be (patch) | |
| tree | a98e81640b999e78461070dc9dfcd2a375fc8e3d /arch/arm/mach-u300/spi.c | |
| parent | mach-u300: use mmci driver for GPIO card detect (diff) | |
| download | linux-dev-ec8f12533b4a439a8feb0d1a3bf15516781804be.tar.xz linux-dev-ec8f12533b4a439a8feb0d1a3bf15516781804be.zip | |
mach-u300: config U300 PL180 PL011 PL022 for DMA
This will configure the platform data for the PL180, PL011 and
PL022 PrimeCells found in the U300 to use DMA with the generic
PrimeCell DMA engine for COH 901 318.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/mach-u300/spi.c')
| -rw-r--r-- | arch/arm/mach-u300/spi.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/arch/arm/mach-u300/spi.c b/arch/arm/mach-u300/spi.c index 00869def5420..5767208f1c1d 100644 --- a/arch/arm/mach-u300/spi.c +++ b/arch/arm/mach-u300/spi.c @@ -11,6 +11,9 @@ #include <linux/spi/spi.h> #include <linux/amba/pl022.h> #include <linux/err.h> +#include <mach/coh901318.h> +#include <mach/dma_channels.h> + #include "padmux.h" /* @@ -30,11 +33,8 @@ static void select_dummy_chip(u32 chipselect) } struct pl022_config_chip dummy_chip_info = { - /* - * available POLLING_TRANSFER and INTERRUPT_TRANSFER, - * DMA_TRANSFER does not work - */ - .com_mode = INTERRUPT_TRANSFER, + /* available POLLING_TRANSFER, INTERRUPT_TRANSFER, DMA_TRANSFER */ + .com_mode = DMA_TRANSFER, .iface = SSP_INTERFACE_MOTOROLA_SPI, /* We can only act as master but SSP_SLAVE is possible in theory */ .hierarchy = SSP_MASTER, @@ -75,8 +75,6 @@ static struct spi_board_info u300_spi_devices[] = { static struct pl022_ssp_controller ssp_platform_data = { /* If you have several SPI buses this varies, we have only bus 0 */ .bus_id = 0, - /* Set this to 1 when we think we got DMA working */ - .enable_dma = 0, /* * On the APP CPU GPIO 4, 5 and 6 are connected as generic * chip selects for SPI. (Same on U330, U335 and U365.) @@ -84,6 +82,14 @@ static struct pl022_ssp_controller ssp_platform_data = { * and do padmuxing accordingly too. */ .num_chipselect = 3, +#ifdef CONFIG_COH901318 + .enable_dma = 1, + .dma_filter = coh901318_filter_id, + .dma_rx_param = (void *) U300_DMA_SPI_RX, + .dma_tx_param = (void *) U300_DMA_SPI_TX, +#else + .enable_dma = 0, +#endif }; @@ -109,6 +115,7 @@ void __init u300_spi_init(struct amba_device *adev) } } + void __init u300_spi_register_board_devices(void) { /* Register any SPI devices */ |