1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* 4 * Copyright (C) 2009 Samsung Electronics Ltd. 5 * Jaswinder Singh <jassi.brar@samsung.com> 6 */ 7 8 #ifndef __SPI_S3C64XX_H 9 #define __SPI_S3C64XX_H 10 11 #include <linux/dmaengine.h> 12 13 struct platform_device; 14 15 /** 16 * struct s3c64xx_spi_csinfo - ChipSelect description 17 * @fb_delay: Slave specific feedback delay. 18 * Refer to FB_CLK_SEL register definition in SPI chapter. 19 * @line: Custom 'identity' of the CS line. 20 * 21 * This is per SPI-Slave Chipselect information. 22 * Allocate and initialize one in machine init code and make the 23 * spi_board_info.controller_data point to it. 24 */ 25 struct s3c64xx_spi_csinfo { 26 u8 fb_delay; 27 unsigned line; 28 }; 29 30 /** 31 * struct s3c64xx_spi_info - SPI Controller defining structure 32 * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field. 33 * @num_cs: Number of CS this controller emulates. 34 * @cfg_gpio: Configure pins for this SPI controller. 35 */ 36 struct s3c64xx_spi_info { 37 int src_clk_nr; 38 int num_cs; 39 bool no_cs; 40 int (*cfg_gpio)(void); 41 }; 42 43 /** 44 * s3c64xx_spi_set_platdata - SPI Controller configure callback by the board 45 * initialization code. 46 * @cfg_gpio: Pointer to gpio setup function. 47 * @src_clk_nr: Clock the SPI controller is to use to generate SPI clocks. 48 * @num_cs: Number of elements in the 'cs' array. 49 * 50 * Call this from machine init code for each SPI Controller that 51 * has some chips attached to it. 52 */ 53 extern void s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 54 int num_cs); 55 extern void s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 56 int num_cs); 57 extern void s3c64xx_spi2_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 58 int num_cs); 59 60 /* defined by architecture to configure gpio */ 61 extern int s3c64xx_spi0_cfg_gpio(void); 62 extern int s3c64xx_spi1_cfg_gpio(void); 63 extern int s3c64xx_spi2_cfg_gpio(void); 64 65 extern struct s3c64xx_spi_info s3c64xx_spi0_pdata; 66 extern struct s3c64xx_spi_info s3c64xx_spi1_pdata; 67 extern struct s3c64xx_spi_info s3c64xx_spi2_pdata; 68 #endif /*__SPI_S3C64XX_H */ 69
