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); 239