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_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
12#define PXA2XX_CS_ASSERT (0x01)
13#define PXA2XX_CS_DEASSERT (0x02)
14
15struct dma_chan;
16
17/*
18 * The platform data for SSP controller devices
19 * (resides in device.platform_data).
20 */
21struct pxa2xx_spi_controller {
22 u16 num_chipselect;
23 u8 enable_dma;
24 u8 dma_burst_size;
25 bool is_slave;
26
27 /* DMA engine specific config */
28 bool (*dma_filter)(struct dma_chan *chan, void *param);
29 void *tx_param;
30 void *rx_param;
31
32 /* For non-PXA arches */
33 struct ssp_device ssp;
34};
35
36/*
37 * The controller specific data for SPI slave devices
38 * (resides in spi_board_info.controller_data),
39 * copied to spi_device.platform_data ... mostly for
40 * DMA tuning.
41 */
42struct pxa2xx_spi_chip {
43 u8 tx_threshold;
44 u8 tx_hi_threshold;
45 u8 rx_threshold;
46 u8 dma_burst_size;
47 u32 timeout;
48 u8 enable_loopback;
49 int gpio_cs;
50 void (*cs_control)(u32 command);
51};
52
53#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
54
55#include <linux/clk.h>
56
57extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info);
58
59#endif
60
61#endif /* __LINUX_SPI_PXA2XX_SPI_H */