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_pxa2xx_spi_h
   6#define __linux_pxa2xx_spi_h
   7
   8#include <linux/pxa2xx_ssp.h>
   9
  10#define PXA2XX_CS_ASSERT (0x01)
  11#define PXA2XX_CS_DEASSERT (0x02)
  12
  13struct dma_chan;
  14
  15/* device.platform_data for SSP controller devices */
  16struct pxa2xx_spi_controller {
  17        u16 num_chipselect;
  18        u8 enable_dma;
  19        u8 dma_burst_size;
  20        bool is_slave;
  21
  22        /* DMA engine specific config */
  23        bool (*dma_filter)(struct dma_chan *chan, void *param);
  24        void *tx_param;
  25        void *rx_param;
  26
  27        /* For non-PXA arches */
  28        struct ssp_device ssp;
  29};
  30
  31/* spi_board_info.controller_data for SPI slave devices,
  32 * copied to spi_device.platform_data ... mostly for dma tuning
  33 */
  34struct pxa2xx_spi_chip {
  35        u8 tx_threshold;
  36        u8 tx_hi_threshold;
  37        u8 rx_threshold;
  38        u8 dma_burst_size;
  39        u32 timeout;
  40        u8 enable_loopback;
  41        int gpio_cs;
  42        void (*cs_control)(u32 command);
  43};
  44
  45#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
  46
  47#include <linux/clk.h>
  48
  49extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info);
  50
  51#endif
  52#endif
  53