arch/arm/mach-ux500/board-mop500-uib.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
   5  * License terms: GNU General Public License (GPL), version 2
   6  */
   7
   8 #define pr_fmt(fmt)     "mop500-uib: " fmt
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/i2c.h>
  13
  14 #include "board-mop500.h"
  15 #include "id.h"
  16
  17 enum mop500_uib {
  18 };
  19
  20 struct uib {
  21         const char *name;
  22         const char *option;
  23         void (*init)(void);
  24 };
  25
  26 static struct uib __initdata mop500_uibs[] = {
  27 };
  28
  29 static struct uib *mop500_uib;
  30
  31 static int __init mop500_uib_setup(char *str)
  32 {
  33         int i;
  34
  35         for (i = 0; i < ARRAY_SIZE(mop500_uibs); i++) {
  36                 struct uib *uib = &mop500_uibs[i];
  37
  38                 if (!strcmp(str, uib->option)) {
  39                         mop500_uib = uib;
  40                         break;
  41                 }
  42         }
  43
  44         if (i == ARRAY_SIZE(mop500_uibs))
  45                 pr_err("invalid uib= option (%s)\n", str);
  46
  47         return 1;
  48 }
  49 __setup("uib=", mop500_uib_setup);
  50
  51 /*
  52  * The UIBs are detected after the I2C host controllers are registered, so
  53  * i2c_register_board_info() can't be used.
  54  */
  55 void mop500_uib_i2c_add(int busnum, struct i2c_board_info *info,
  56                 unsigned n)
  57 {
  58         struct i2c_adapter *adap;
  59         struct i2c_client *client;
  60         int i;
  61
  62         adap = i2c_get_adapter(busnum);
  63         if (!adap) {
  64                 pr_err("failed to get adapter i2c%d\n", busnum);
  65                 return;
  66         }
  67
  68         for (i = 0; i < n; i++) {
  69                 client = i2c_new_device(adap, &info[i]);
  70                 if (!client)
  71                         pr_err("failed to register %s to i2c%d\n",
  72                                         info[i].type, busnum);
  73         }
  74
  75         i2c_put_adapter(adap);
  76 }
  77
  78 static void __init __mop500_uib_init(struct uib *uib, const char *why)
  79 {
  80         pr_info("%s (%s)\n", uib->name, why);
  81         uib->init();
  82 }
  83
  84 int __init mop500_uib_init(void)
  85 {
  86         struct uib *uib = mop500_uib;
  87
  88         if (!cpu_is_u8500_family())
  89                 return -ENODEV;
  90
  91         if (uib) {
  92                 __mop500_uib_init(uib, "from uib= boot argument");
  93                 return 0;
  94         }
  95
  96         return 0;
  97 }