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