arch/arm/mach-omap2/devices.c

   1 /*
   2  * linux/arch/arm/mach-omap2/devices.c
   3  *
   4  * OMAP2 platform device setup/initialization
   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 as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11 #include <linux/gpio.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/io.h>
  16 #include <linux/clk.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/of.h>
  20 #include <linux/pinctrl/machine.h>
  21
  22 #include <asm/mach-types.h>
  23 #include <asm/mach/map.h>
  24
  25 #include <linux/omap-dma.h>
  26
  27 #include "iomap.h"
  28 #include "omap_hwmod.h"
  29 #include "omap_device.h"
  30
  31 #include "soc.h"
  32 #include "common.h"
  33 #include "mux.h"
  34 #include "control.h"
  35 #include "display.h"
  36
  37 #define L3_MODULES_MAX_LEN 12
  38 #define L3_MODULES 3
  39
  40 static int __init omap3_l3_init(void)
  41 {
  42         struct omap_hwmod *oh;
  43         struct platform_device *pdev;
  44         char oh_name[L3_MODULES_MAX_LEN];
  45
  46         /*
  47          * To avoid code running on other OMAPs in
  48          * multi-omap builds
  49          */
  50         if (!(cpu_is_omap34xx()) || of_have_populated_dt())
  51                 return -ENODEV;
  52
  53         snprintf(oh_name, L3_MODULES_MAX_LEN, "l3_main");
  54
  55         oh = omap_hwmod_lookup(oh_name);
  56
  57         if (!oh)
  58                 pr_err("could not look up %s\n", oh_name);
  59
  60         pdev = omap_device_build("omap_l3_smx", 0, oh, NULL, 0);
  61
  62         WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
  63
  64         return PTR_ERR_OR_ZERO(pdev);
  65 }
  66 omap_postcore_initcall(omap3_l3_init);
  67
  68 static inline void omap_init_sti(void) {}
  69
  70 #if IS_ENABLED(CONFIG_SPI_OMAP24XX)
  71
  72 #include <linux/platform_data/spi-omap2-mcspi.h>
  73
  74 static int __init omap_mcspi_init(struct omap_hwmod *oh, void *unused)
  75 {
  76         struct platform_device *pdev;
  77         char *name = "omap2_mcspi";
  78         struct omap2_mcspi_platform_config *pdata;
  79         static int spi_num;
  80         struct omap2_mcspi_dev_attr *mcspi_attrib = oh->dev_attr;
  81
  82         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
  83         if (!pdata) {
  84                 pr_err("Memory allocation for McSPI device failed\n");
  85                 return -ENOMEM;
  86         }
  87
  88         pdata->num_cs = mcspi_attrib->num_chipselect;
  89         switch (oh->class->rev) {
  90         case OMAP2_MCSPI_REV:
  91         case OMAP3_MCSPI_REV:
  92                         pdata->regs_offset = 0;
  93                         break;
  94         case OMAP4_MCSPI_REV:
  95                         pdata->regs_offset = OMAP4_MCSPI_REG_OFFSET;
  96                         break;
  97         default:
  98                         pr_err("Invalid McSPI Revision value\n");
  99                         kfree(pdata);
 100                         return -EINVAL;
 101         }
 102
 103         spi_num++;
 104         pdev = omap_device_build(name, spi_num, oh, pdata, sizeof(*pdata));
 105         WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s\n",
 106                                 name, oh->name);
 107         kfree(pdata);
 108         return 0;
 109 }
 110
 111 static void omap_init_mcspi(void)
 112 {
 113         omap_hwmod_for_each_by_class("mcspi", omap_mcspi_init, NULL);
 114 }
 115
 116 #else
 117 static inline void omap_init_mcspi(void) {}
 118 #endif
 119
 120 /**
 121  * omap_init_rng - bind the RNG hwmod to the RNG omap_device
 122  *
 123  * Bind the RNG hwmod to the RNG omap_device.  No return value.
 124  */
 125 static void omap_init_rng(void)
 126 {
 127         struct omap_hwmod *oh;
 128         struct platform_device *pdev;
 129
 130         oh = omap_hwmod_lookup("rng");
 131         if (!oh)
 132                 return;
 133
 134         pdev = omap_device_build("omap_rng", -1, oh, NULL, 0);
 135         WARN(IS_ERR(pdev), "Can't build omap_device for omap_rng\n");
 136 }
 137
 138 static void __init omap_init_sham(void)
 139 {
 140         struct omap_hwmod *oh;
 141         struct platform_device *pdev;
 142
 143         oh = omap_hwmod_lookup("sham");
 144         if (!oh)
 145                 return;
 146
 147         pdev = omap_device_build("omap-sham", -1, oh, NULL, 0);
 148         WARN(IS_ERR(pdev), "Can't build omap_device for omap-sham\n");
 149 }
 150
 151 static void __init omap_init_aes(void)
 152 {
 153         struct omap_hwmod *oh;
 154         struct platform_device *pdev;
 155
 156         oh = omap_hwmod_lookup("aes");
 157         if (!oh)
 158                 return;
 159
 160         pdev = omap_device_build("omap-aes", -1, oh, NULL, 0);
 161         WARN(IS_ERR(pdev), "Can't build omap_device for omap-aes\n");
 162 }
 163
 164 /*-------------------------------------------------------------------------*/
 165
 166 #if IS_ENABLED(CONFIG_VIDEO_OMAP2_VOUT)
 167 #if IS_ENABLED(CONFIG_FB_OMAP2)
 168 static struct resource omap_vout_resource[3 - CONFIG_FB_OMAP2_NUM_FBS] = {
 169 };
 170 #else
 171 static struct resource omap_vout_resource[2] = {
 172 };
 173 #endif
 174
 175 static struct platform_device omap_vout_device = {
 176         .name           = "omap_vout",
 177         .num_resources  = ARRAY_SIZE(omap_vout_resource),
 178         .resource       = &omap_vout_resource[0],
 179         .id             = -1,
 180 };
 181
 182 int __init omap_init_vout(void)
 183 {
 184         return platform_device_register(&omap_vout_device);
 185 }
 186 #else
 187 int __init omap_init_vout(void) { return 0; }
 188 #endif
 189
 190 /*-------------------------------------------------------------------------*/
 191
 192 static int __init omap2_init_devices(void)
 193 {
 194         /* Enable dummy states for those platforms without pinctrl support */
 195         if (!of_have_populated_dt())
 196                 pinctrl_provide_dummies();
 197
 198         /* If dtb is there, the devices will be created dynamically */
 199         if (!of_have_populated_dt()) {
 200                 /*
 201                  * please keep these calls, and their implementations above,
 202                  * in alphabetical order so they're easier to sort through.
 203                  */
 204                 omap_init_mcspi();
 205                 omap_init_sham();
 206                 omap_init_aes();
 207                 omap_init_rng();
 208         }
 209         omap_init_sti();
 210
 211         return 0;
 212 }
 213 omap_arch_initcall(omap2_init_devices);
 214
 215 static int __init omap_gpmc_init(void)
 216 {
 217         struct omap_hwmod *oh;
 218         struct platform_device *pdev;
 219         char *oh_name = "gpmc";
 220
 221         /*
 222          * if the board boots up with a populated DT, do not
 223          * manually add the device from this initcall
 224          */
 225         if (of_have_populated_dt())
 226                 return -ENODEV;
 227
 228         oh = omap_hwmod_lookup(oh_name);
 229         if (!oh) {
 230                 pr_err("Could not look up %s\n", oh_name);
 231                 return -ENODEV;
 232         }
 233
 234         pdev = omap_device_build("omap-gpmc", -1, oh, NULL, 0);
 235         WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
 236
 237         return PTR_ERR_OR_ZERO(pdev);
 238 }
 239 omap_postcore_initcall(omap_gpmc_init);