diff options
| author | Nicolas Ferre <nicolas.ferre@atmel.com> | 2012-03-14 12:41:43 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@linux.intel.com> | 2012-03-21 16:42:29 +0100 |
| commit | beeaa103eecc7a132682c40867f0ef70655383a5 (patch) | |
| tree | c1cc34c65347a04d859eae78076322668d2f636d /arch/arm | |
| parent | dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic (diff) | |
| download | linux-beeaa103eecc7a132682c40867f0ef70655383a5.tar.xz linux-beeaa103eecc7a132682c40867f0ef70655383a5.zip | |
dmaengine: at_hdmac: add slave config operation
This patch introduces DMA_SLAVE_CONFIG to at_hdmac Atmel DMA driver.
It is needed to fix a regression in the use of atmel-mci.c driver on Atmel
AT91 platforms brouth by e2b35f3:
"dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changes"
We remove some parts of the private structure "at_dma_slave" and use the
information provided by "struct dma_slave_config": source/destination
peripheral registers and access width.
AT_DMA_SLAVE_WIDTH_* values used previously are not needed anymore as we
now use the standard ones. Although some conversion functions are needed to
match register expected values.
Some AT91 sub-architecture specific files are slightly touched by this patch
but it cannot be split because it can break compilation.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-at91/at91sam9g45_devices.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-at91/include/mach/at_hdmac.h | 15 |
2 files changed, 0 insertions, 16 deletions
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c index b7582dd10dc3..1f89b206c26f 100644 --- a/arch/arm/mach-at91/at91sam9g45_devices.c +++ b/arch/arm/mach-at91/at91sam9g45_devices.c @@ -431,7 +431,6 @@ void __init at91_add_device_mci(short mmc_id, struct mci_platform_data *data) /* DMA slave channel configuration */ atslave->dma_dev = &at_hdmac_device.dev; - atslave->reg_width = AT_DMA_SLAVE_WIDTH_32BIT; atslave->cfg = ATC_FIFOCFG_HALFFIFO | ATC_SRC_H2SEL_HW | ATC_DST_H2SEL_HW; atslave->ctrla = ATC_SCSIZE_16 | ATC_DCSIZE_16; diff --git a/arch/arm/mach-at91/include/mach/at_hdmac.h b/arch/arm/mach-at91/include/mach/at_hdmac.h index 187cb58345c0..fff48d1a0f4e 100644 --- a/arch/arm/mach-at91/include/mach/at_hdmac.h +++ b/arch/arm/mach-at91/include/mach/at_hdmac.h @@ -24,18 +24,6 @@ struct at_dma_platform_data { }; /** - * enum at_dma_slave_width - DMA slave register access width. - * @AT_DMA_SLAVE_WIDTH_8BIT: Do 8-bit slave register accesses - * @AT_DMA_SLAVE_WIDTH_16BIT: Do 16-bit slave register accesses - * @AT_DMA_SLAVE_WIDTH_32BIT: Do 32-bit slave register accesses - */ -enum at_dma_slave_width { - AT_DMA_SLAVE_WIDTH_8BIT = 0, - AT_DMA_SLAVE_WIDTH_16BIT, - AT_DMA_SLAVE_WIDTH_32BIT, -}; - -/** * struct at_dma_slave - Controller-specific information about a slave * @dma_dev: required DMA master device * @tx_reg: physical address of data register used for @@ -48,9 +36,6 @@ enum at_dma_slave_width { */ struct at_dma_slave { struct device *dma_dev; - dma_addr_t tx_reg; - dma_addr_t rx_reg; - enum at_dma_slave_width reg_width; u32 cfg; u32 ctrla; }; |