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b729bf3453
That field has been deprecated in favour of getting the necessary information from ACPI/DT. However, we still need to deal systems that are PCI only (no ACPI to back up). In order to support such systems, we allow the DMA filter function and its corresponding parameter via pxa2xx_spi_master platform data. Then when the pxa2xx_spi_dma_setup() doesn't find the channel via ACPI, it falls back to use the given filter function. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
65 lines
1.7 KiB
C
65 lines
1.7 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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struct dma_chan;
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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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/* DMA engine specific config */
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bool (*dma_filter)(struct dma_chan *chan, void *param);
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void *tx_param;
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void *rx_param;
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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 tx_hi_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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