LXR linux/include/linux/platform

   1/* linux/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
   2 *
   3 * Copyright (C) 2009 Samsung Electronics Ltd.
   4 *      Jaswinder Singh <jassi.brar@samsung.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#ifndef __S3C64XX_PLAT_SPI_H
  12#define __S3C64XX_PLAT_SPI_H
  13
  14struct platform_device;
  15
  16/**
  17 * struct s3c64xx_spi_csinfo - ChipSelect description
  18 * @fb_delay: Slave specific feedback delay.
  19 *            Refer to FB_CLK_SEL register definition in SPI chapter.
  20 * @line: Custom 'identity' of the CS line.
  21 *
  22 * This is per SPI-Slave Chipselect information.
  23 * Allocate and initialize one in machine init code and make the
  24 * spi_board_info.controller_data point to it.
  25 */
  26struct s3c64xx_spi_csinfo {
  27        u8 fb_delay;
  28        unsigned line;
  29};
  30
  31/**
  32 * struct s3c64xx_spi_info - SPI Controller defining structure
  33 * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field.
  34 * @num_cs: Number of CS this controller emulates.
  35 * @cfg_gpio: Configure pins for this SPI controller.
  36 */
  37struct s3c64xx_spi_info {
  38        int src_clk_nr;
  39        int num_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 */
  53extern void s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
  54                                                int num_cs);
  55extern void s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
  56                                                int num_cs);
  57extern 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 */
  61extern int s3c64xx_spi0_cfg_gpio(void);
  62extern int s3c64xx_spi1_cfg_gpio(void);
  63extern int s3c64xx_spi2_cfg_gpio(void);
  64
  65extern struct s3c64xx_spi_info s3c64xx_spi0_pdata;
  66extern struct s3c64xx_spi_info s3c64xx_spi1_pdata;
  67extern struct s3c64xx_spi_info s3c64xx_spi2_pdata;
  68#endif /* __S3C64XX_PLAT_SPI_H */
  69