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 15 struct dma_chan; 16 17 /* 18 * The platform data for SSP controller devices 19 * (resides in device.platform_data). 20 */ 21 struct 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 */ 42 struct 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 57 extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info); 58 59 #endif 60 61 #endif /* __LINUX_SPI_PXA2XX_SPI_H */ 62