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kernel add
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/*
* Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __linux_pxa2xx_spi_h
#define __linux_pxa2xx_spi_h
#include <linux/pxa2xx_ssp.h>
#define PXA2XX_CS_ASSERT (0x01)
#define PXA2XX_CS_DEASSERT (0x02)
struct dma_chan;
/* device.platform_data for SSP controller devices */
struct pxa2xx_spi_master {
u16 num_chipselect;
u8 enable_dma;
/* DMA engine specific config */
bool (*dma_filter)(struct dma_chan *chan, void *param);
void *tx_param;
void *rx_param;
/* For non-PXA arches */
struct ssp_device ssp;
};
/* spi_board_info.controller_data for SPI slave devices,
* copied to spi_device.platform_data ... mostly for dma tuning
*/
struct pxa2xx_spi_chip {
u8 tx_threshold;
u8 tx_hi_threshold;
u8 rx_threshold;
u8 dma_burst_size;
u32 timeout;
u8 enable_loopback;
int gpio_cs;
void (*cs_control)(u32 command);
};
#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
#include <linux/clk.h>
extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
#endif
#endif
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