cd7bed0034
The PXA SPI driver uses PXA platform specific private DMA implementation which does not work on non-PXA platforms. In order to use this driver on other platforms we break out the private DMA implementation into a separate file that gets compiled only when CONFIG_SPI_PXA2XX_PXADMA is set. The DMA functions are stubbed out if there is no DMA implementation selected (i.e we are building on non-PXA platform). While we are there we can kill the dummy DMA bits in pxa2xx_spi.h as they are not needed anymore for CE4100. Once this is done we can add the generic DMA engine support to the driver that allows usage of any DMA controller that implements DMA engine API. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Lu Cao <lucao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __linux_pxa2xx_spi_h
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#define __linux_pxa2xx_spi_h
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#include <linux/pxa2xx_ssp.h>
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#define PXA2XX_CS_ASSERT (0x01)
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#define PXA2XX_CS_DEASSERT (0x02)
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/* device.platform_data for SSP controller devices */
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struct pxa2xx_spi_master {
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u32 clock_enable;
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u16 num_chipselect;
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u8 enable_dma;
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/* For non-PXA arches */
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struct ssp_device ssp;
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};
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/* spi_board_info.controller_data for SPI slave devices,
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* copied to spi_device.platform_data ... mostly for dma tuning
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*/
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struct pxa2xx_spi_chip {
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u8 tx_threshold;
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u8 rx_threshold;
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u8 dma_burst_size;
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u32 timeout;
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u8 enable_loopback;
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int gpio_cs;
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void (*cs_control)(u32 command);
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};
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#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
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#include <linux/clk.h>
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#include <mach/dma.h>
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extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
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#endif
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#endif
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