tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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