LXR linux/include/linux/spi/pxa2xx

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
   4 */
   5#ifndef __LINUX_SPI_PXA2XX_SPI_H
   6#define __LINUX_SPI_PXA2XX_SPI_H
   7
   8#include <linux/types.h>
   9
  10#include <linux/pxa2xx_ssp.h>
  11
  12struct dma_chan;
  13
  14/*
  15 * The platform data for SSP controller devices
  16 * (resides in device.platform_data).
  17 */
  18struct pxa2xx_spi_controller {
  19        u16 num_chipselect;
  20        u8 enable_dma;
  21        u8 dma_burst_size;
  22        bool is_slave;
  23
  24        /* DMA engine specific config */
  25        bool (*dma_filter)(struct dma_chan *chan, void *param);
  26        void *tx_param;
  27        void *rx_param;
  28
  29        /* For non-PXA arches */
  30        struct ssp_device ssp;
  31};
  32
  33/*
  34 * The controller specific data for SPI slave devices
  35 * (resides in spi_board_info.controller_data),
  36 * copied to spi_device.platform_data ... mostly for
  37 * DMA tuning.
  38 */
  39struct pxa2xx_spi_chip {
  40        u8 tx_threshold;
  41        u8 tx_hi_threshold;
  42        u8 rx_threshold;
  43        u8 dma_burst_size;
  44        u32 timeout;
  45};
  46
  47#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
  48
  49#include <linux/clk.h>
  50
  51extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info);
  52
  53#endif
  54
  55#endif  /* __LINUX_SPI_PXA2XX_SPI_H */
  56