| /* linux/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h |
| * |
| * Copyright (C) 2009 Samsung Electronics Ltd. |
| * Jaswinder Singh <jassi.brar@samsung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #ifndef __S3C64XX_PLAT_SPI_H |
| #define __S3C64XX_PLAT_SPI_H |
| |
| /** |
| * struct s3c64xx_spi_csinfo - ChipSelect description |
| * @fb_delay: Slave specific feedback delay. |
| * Refer to FB_CLK_SEL register definition in SPI chapter. |
| * @line: Custom 'identity' of the CS line. |
| * @set_level: CS line control. |
| * |
| * This is per SPI-Slave Chipselect information. |
| * Allocate and initialize one in machine init code and make the |
| * spi_board_info.controller_data point to it. |
| */ |
| struct s3c64xx_spi_csinfo { |
| u8 fb_delay; |
| unsigned line; |
| void (*set_level)(unsigned line_id, int lvl); |
| }; |
| |
| /** |
| * struct s3c64xx_spi_info - SPI Controller defining structure |
| * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field. |
| * @src_clk_name: Platform name of the corresponding clock. |
| * @num_cs: Number of CS this controller emulates. |
| * @cfg_gpio: Configure pins for this SPI controller. |
| * @fifo_lvl_mask: All tx fifo_lvl fields start at offset-6 |
| * @rx_lvl_offset: Depends on tx fifo_lvl field and bus number |
| * @high_speed: If the controller supports HIGH_SPEED_EN bit |
| */ |
| struct s3c64xx_spi_info { |
| int src_clk_nr; |
| char *src_clk_name; |
| |
| int num_cs; |
| |
| int (*cfg_gpio)(struct platform_device *pdev); |
| |
| /* Following two fields are for future compatibility */ |
| int fifo_lvl_mask; |
| int rx_lvl_offset; |
| int high_speed; |
| }; |
| |
| /** |
| * s3c64xx_spi_set_info - SPI Controller configure callback by the board |
| * initialization code. |
| * @cntrlr: SPI controller number the configuration is for. |
| * @src_clk_nr: Clock the SPI controller is to use to generate SPI clocks. |
| * @num_cs: Number of elements in the 'cs' array. |
| * |
| * Call this from machine init code for each SPI Controller that |
| * has some chips attached to it. |
| */ |
| extern void s3c64xx_spi_set_info(int cntrlr, int src_clk_nr, int num_cs); |
| |
| #endif /* __S3C64XX_PLAT_SPI_H */ |