arch/arm/plat-s3c/dev-i2c0.c

   1 /* linux/arch/arm/plat-s3c/dev-i2c0.c
   2  *
   3  * Copyright 2008 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *      http://armlinux.simtec.co.uk/
   6  *
   7  * S3C series device definition for i2c device 0
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/string.h>
  16 #include <linux/platform_device.h>
  17
  18 #include <mach/map.h>
  19
  20 #include <plat/regs-iic.h>
  21 #include <plat/iic.h>
  22 #include <plat/devs.h>
  23 #include <plat/cpu.h>
  24
  25 static struct resource s3c_i2c_resource[] = {
  26         [0] = {
  27                 .start = S3C_PA_IIC,
  28                 .end   = S3C_PA_IIC + SZ_4K - 1,
  29                 .flags = IORESOURCE_MEM,
  30         },
  31         [1] = {
  32                 .start = IRQ_IIC,
  33                 .end   = IRQ_IIC,
  34                 .flags = IORESOURCE_IRQ,
  35         },
  36 };
  37
  38 struct platform_device s3c_device_i2c0 = {
  39         .name             = "s3c2410-i2c",
  40 #ifdef CONFIG_S3C_DEV_I2C1
  41         .id               = 0,
  42 #else
  43         .id               = -1,
  44 #endif
  45         .num_resources    = ARRAY_SIZE(s3c_i2c_resource),
  46         .resource         = s3c_i2c_resource,
  47 };
  48
  49 static struct s3c2410_platform_i2c default_i2c_data0 __initdata = {
  50         .flags          = 0,
  51         .slave_addr     = 0x10,
  52         .bus_freq       = 100*1000,
  53         .max_freq       = 400*1000,
  54         .sda_delay      = S3C2410_IICLC_SDA_DELAY5 | S3C2410_IICLC_FILTER_ON,
  55 };
  56
  57 void __init s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *pd)
  58 {
  59         struct s3c2410_platform_i2c *npd;
  60
  61         if (!pd)
  62                 pd = &default_i2c_data0;
  63
  64         npd = kmemdup(pd, sizeof(struct s3c2410_platform_i2c), GFP_KERNEL);
  65         if (!npd)
  66                 printk(KERN_ERR "%s: no memory for platform data\n", __func__);
  67         else if (!npd->cfg_gpio)
  68                 npd->cfg_gpio = s3c_i2c0_cfg_gpio;
  69
  70         s3c_device_i2c0.dev.platform_data = npd;
  71 }