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 13 struct dma_chan; 14 15 /* device.platform_data for SSP controller devices */ 16 struct 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 */ 34 struct 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 49 extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info); 50 51 #endif 52 #endif 53
