1 /* 2 * s2mps11.c 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd 5 * http://www.samsung.com 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 */ 13 14 #include <linux/bug.h> 15 #include <linux/delay.h> 16 #include <linux/err.h> 17 #include <linux/gpio.h> 18 #include <linux/slab.h> 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/regulator/machine.h> 23 #include <linux/mfd/samsung/core.h> 24 #include <linux/mfd/samsung/s2mps11.h> 25 26 struct s2mps11_info { 27 struct regulator_dev **rdev; 28 29 int ramp_delay2; 30 int ramp_delay34; 31 int ramp_delay5; 32 int ramp_delay16; 33 int ramp_delay7810; 34 int ramp_delay9; 35 36 bool buck6_ramp; 37 bool buck2_ramp; 38 bool buck3_ramp; 39 bool buck4_ramp; 40 }; 41 42 static int get_ramp_delay(int ramp_delay) 43 { 44 unsigned char cnt = 0; 45 46 ramp_delay /= 6; 47 48 while (true) { 49 ramp_delay = ramp_delay >> 1; 50 if (ramp_delay == 0) 51 break; 52 cnt++; 53 } 54 return cnt; 55 } 56 57 static struct regulator_ops s2mps11_ldo_ops = { 58 .list_voltage = regulator_list_voltage_linear, 59 .map_voltage = regulator_map_voltage_linear, 60 .is_enabled = regulator_is_enabled_regmap, 61 .enable = regulator_enable_regmap, 62 .disable = regulator_disable_regmap, 63 .get_voltage_sel = regulator_get_voltage_sel_regmap, 64 .set_voltage_sel = regulator_set_voltage_sel_regmap, 65 .set_voltage_time_sel = regulator_set_voltage_time_sel, 66 }; 67 68 static struct regulator_ops s2mps11_buck_ops = { 69 .list_voltage = regulator_list_voltage_linear, 70 .map_voltage = regulator_map_voltage_linear, 71 .is_enabled = regulator_is_enabled_regmap, 72 .enable = regulator_enable_regmap, 73 .disable = regulator_disable_regmap, 74 .get_voltage_sel = regulator_get_voltage_sel_regmap, 75 .set_voltage_sel = regulator_set_voltage_sel_regmap, 76 .set_voltage_time_sel = regulator_set_voltage_time_sel, 77 }; 78 79 #define regulator_desc_ldo1(num) { \ 80 .name = "LDO"#num, \ 81 .id = S2MPS11_LDO##num, \ 82 .ops = &s2mps11_ldo_ops, \ 83 .type = REGULATOR_VOLTAGE, \ 84 .owner = THIS_MODULE, \ 85 .min_uV = S2MPS11_LDO_MIN, \ 86 .uV_step = S2MPS11_LDO_STEP1, \ 87 .n_voltages = S2MPS11_LDO_N_VOLTAGES, \ 88 .vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \ 89 .vsel_mask = S2MPS11_LDO_VSEL_MASK, \ 90 .enable_reg = S2MPS11_REG_L1CTRL + num - 1, \ 91 .enable_mask = S2MPS11_ENABLE_MASK \ 92 } 93 #define regulator_desc_ldo2(num) { \ 94 .name = "LDO"#num, \ 95 .id = S2MPS11_LDO##num, \ 96 .ops = &s2mps11_ldo_ops, \ 97 .type = REGULATOR_VOLTAGE, \ 98 .owner = THIS_MODULE, \ 99 .min_uV = S2MPS11_LDO_MIN, \ 100 .uV_step = S2MPS11_LDO_STEP2, \ 101 .n_voltages = S2MPS11_LDO_N_VOLTAGES, \ 102 .vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \ 103 .vsel_mask = S2MPS11_LDO_VSEL_MASK, \ 104 .enable_reg = S2MPS11_REG_L1CTRL + num - 1, \ 105 .enable_mask = S2MPS11_ENABLE_MASK \ 106 } 107 108 #define regulator_desc_buck1_4(num) { \ 109 .name = "BUCK"#num, \ 110 .id = S2MPS11_BUCK##num, \ 111 .ops = &s2mps11_buck_ops, \ 112 .type = REGULATOR_VOLTAGE, \ 113 .owner = THIS_MODULE, \ 114 .min_uV = S2MPS11_BUCK_MIN1, \ 115 .uV_step = S2MPS11_BUCK_STEP1, \ 116 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \ 117 .vsel_reg = S2MPS11_REG_B1CTRL2 + (num - 1) * 2, \ 118 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ 119 .enable_reg = S2MPS11_REG_B1CTRL1 + (num - 1) * 2, \ 120 .enable_mask = S2MPS11_ENABLE_MASK \ 121 } 122 123 #define regulator_desc_buck5 { \ 124 .name = "BUCK5", \ 125 .id = S2MPS11_BUCK5, \ 126 .ops = &s2mps11_buck_ops, \ 127 .type = REGULATOR_VOLTAGE, \ 128 .owner = THIS_MODULE, \ 129 .min_uV = S2MPS11_BUCK_MIN1, \ 130 .uV_step = S2MPS11_BUCK_STEP1, \ 131 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \ 132 .vsel_reg = S2MPS11_REG_B5CTRL2, \ 133 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ 134 .enable_reg = S2MPS11_REG_B5CTRL1, \ 135 .enable_mask = S2MPS11_ENABLE_MASK \ 136 } 137 138 #define regulator_desc_buck6_8(num) { \ 139 .name = "BUCK"#num, \ 140 .id = S2MPS11_BUCK##num, \ 141 .ops = &s2mps11_buck_ops, \ 142 .type = REGULATOR_VOLTAGE, \ 143 .owner = THIS_MODULE, \ 144 .min_uV = S2MPS11_BUCK_MIN1, \ 145 .uV_step = S2MPS11_BUCK_STEP1, \ 146 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \ 147 .vsel_reg = S2MPS11_REG_B6CTRL2 + (num - 6) * 2, \ 148 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ 149 .enable_reg = S2MPS11_REG_B6CTRL1 + (num - 6) * 2, \ 150 .enable_mask = S2MPS11_ENABLE_MASK \ 151 } 152 153 #define regulator_desc_buck9 { \ 154 .name = "BUCK9", \ 155 .id = S2MPS11_BUCK9, \ 156 .ops = &s2mps11_buck_ops, \ 157 .type = REGULATOR_VOLTAGE, \ 158 .owner = THIS_MODULE, \ 159 .min_uV = S2MPS11_BUCK_MIN3, \ 160 .uV_step = S2MPS11_BUCK_STEP3, \ 161 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \ 162 .vsel_reg = S2MPS11_REG_B9CTRL2, \ 163 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ 164 .enable_reg = S2MPS11_REG_B9CTRL1, \ 165 .enable_mask = S2MPS11_ENABLE_MASK \ 166 } 167 168 #define regulator_desc_buck10 { \ 169 .name = "BUCK10", \ 170 .id = S2MPS11_BUCK10, \ 171 .ops = &s2mps11_buck_ops, \ 172 .type = REGULATOR_VOLTAGE, \ 173 .owner = THIS_MODULE, \ 174 .min_uV = S2MPS11_BUCK_MIN2, \ 175 .uV_step = S2MPS11_BUCK_STEP2, \ 176 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \ 177 .vsel_reg = S2MPS11_REG_B9CTRL2, \ 178 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ 179 .enable_reg = S2MPS11_REG_B9CTRL1, \ 180 .enable_mask = S2MPS11_ENABLE_MASK \ 181 } 182 183 static struct regulator_desc regulators[] = { 184 regulator_desc_ldo2(1), 185 regulator_desc_ldo1(2), 186 regulator_desc_ldo1(3), 187 regulator_desc_ldo1(4), 188 regulator_desc_ldo1(5), 189 regulator_desc_ldo2(6), 190 regulator_desc_ldo1(7), 191 regulator_desc_ldo1(8), 192 regulator_desc_ldo1(9), 193 regulator_desc_ldo1(10), 194 regulator_desc_ldo2(11), 195 regulator_desc_ldo1(12), 196 regulator_desc_ldo1(13), 197 regulator_desc_ldo1(14), 198 regulator_desc_ldo1(15), 199 regulator_desc_ldo1(16), 200 regulator_desc_ldo1(17), 201 regulator_desc_ldo1(18), 202 regulator_desc_ldo1(19), 203 regulator_desc_ldo1(20), 204 regulator_desc_ldo1(21), 205 regulator_desc_ldo2(22), 206 regulator_desc_ldo2(23), 207 regulator_desc_ldo1(24), 208 regulator_desc_ldo1(25), 209 regulator_desc_ldo1(26), 210 regulator_desc_ldo2(27), 211 regulator_desc_ldo1(28), 212 regulator_desc_ldo1(29), 213 regulator_desc_ldo1(30), 214 regulator_desc_ldo1(31), 215 regulator_desc_ldo1(32), 216 regulator_desc_ldo1(33), 217 regulator_desc_ldo1(34), 218 regulator_desc_ldo1(35), 219 regulator_desc_ldo1(36), 220 regulator_desc_ldo1(37), 221 regulator_desc_ldo1(38), 222 regulator_desc_buck1_4(1), 223 regulator_desc_buck1_4(2), 224 regulator_desc_buck1_4(3), 225 regulator_desc_buck1_4(4), 226 regulator_desc_buck5, 227 regulator_desc_buck6_8(6), 228 regulator_desc_buck6_8(7), 229 regulator_desc_buck6_8(8), 230 regulator_desc_buck9, 231 regulator_desc_buck10, 232 }; 233 234 static __devinit int s2mps11_pmic_probe(struct platform_device *pdev) 235 { 236 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); 237 struct sec_platform_data *pdata = dev_get_platdata(iodev->dev); 238 struct regulator_config config = { }; 239 struct regulator_dev **rdev; 240 struct s2mps11_info *s2mps11; 241 int i, ret, size; 242 unsigned char ramp_enable, ramp_reg = 0; 243 244 if (!pdata) { 245 dev_err(pdev->dev.parent, "Platform data not supplied\n"); 246 return -ENODEV; 247 } 248 249 s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info), 250 GFP_KERNEL); 251 if (!s2mps11) 252 return -ENOMEM; 253 254 size = sizeof(struct regulator_dev *) * S2MPS11_REGULATOR_MAX; 255 s2mps11->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); 256 if (!s2mps11->rdev) { 257 return -ENOMEM; 258 } 259 260 rdev = s2mps11->rdev; 261 platform_set_drvdata(pdev, s2mps11); 262 263 s2mps11->ramp_delay2 = pdata->buck2_ramp_delay; 264 s2mps11->ramp_delay34 = pdata->buck34_ramp_delay; 265 s2mps11->ramp_delay5 = pdata->buck5_ramp_delay; 266 s2mps11->ramp_delay16 = pdata->buck16_ramp_delay; 267 s2mps11->ramp_delay7810 = pdata->buck7810_ramp_delay; 268 s2mps11->ramp_delay9 = pdata->buck9_ramp_delay; 269 270 s2mps11->buck6_ramp = pdata->buck6_ramp_enable; 271 s2mps11->buck2_ramp = pdata->buck2_ramp_enable; 272 s2mps11->buck3_ramp = pdata->buck3_ramp_enable; 273 s2mps11->buck4_ramp = pdata->buck4_ramp_enable; 274 275 ramp_enable = (s2mps11->buck2_ramp << 3) | (s2mps11->buck3_ramp << 2) | 276 (s2mps11->buck4_ramp << 1) | s2mps11->buck6_ramp ; 277 278 if (ramp_enable) { 279 if (s2mps11->buck2_ramp) 280 ramp_reg |= get_ramp_delay(s2mps11->ramp_delay2) >> 6; 281 if (s2mps11->buck3_ramp || s2mps11->buck4_ramp) 282 ramp_reg |= get_ramp_delay(s2mps11->ramp_delay34) >> 4; 283 sec_reg_write(iodev, S2MPS11_REG_RAMP, ramp_reg | ramp_enable); 284 } 285 286 ramp_reg &= 0x00; 287 ramp_reg |= get_ramp_delay(s2mps11->ramp_delay5) >> 6; 288 ramp_reg |= get_ramp_delay(s2mps11->ramp_delay16) >> 4; 289 ramp_reg |= get_ramp_delay(s2mps11->ramp_delay7810) >> 2; 290 ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9); 291 sec_reg_write(iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg); 292 293 for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) { 294 295 config.dev = &pdev->dev; 296 config.regmap = iodev->regmap; 297 config.init_data = pdata->regulators[i].initdata; 298 config.driver_data = s2mps11; 299 300 rdev[i] = regulator_register(®ulators[i], &config); 301 if (IS_ERR(rdev[i])) { 302 ret = PTR_ERR(rdev[i]); 303 dev_err(&pdev->dev, "regulator init failed for %d\n", 304 i); 305 rdev[i] = NULL; 306 goto err; 307 } 308 } 309 310 return 0; 311 err: 312 for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) 313 if (rdev[i]) 314 regulator_unregister(rdev[i]); 315 316 return ret; 317 } 318 319 static int __devexit s2mps11_pmic_remove(struct platform_device *pdev) 320 { 321 struct s2mps11_info *s2mps11 = platform_get_drvdata(pdev); 322 struct regulator_dev **rdev = s2mps11->rdev; 323 int i; 324 325 for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) 326 if (rdev[i]) 327 regulator_unregister(rdev[i]); 328 329 return 0; 330 } 331 332 static const struct platform_device_id s2mps11_pmic_id[] = { 333 { "s2mps11-pmic", 0}, 334 { }, 335 }; 336 MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id); 337 338 static struct platform_driver s2mps11_pmic_driver = { 339 .driver = { 340 .name = "s2mps11-pmic", 341 .owner = THIS_MODULE, 342 }, 343 .probe = s2mps11_pmic_probe, 344 .remove = __devexit_p(s2mps11_pmic_remove), 345 .id_table = s2mps11_pmic_id, 346 }; 347 348 static int __init s2mps11_pmic_init(void) 349 { 350 return platform_driver_register(&s2mps11_pmic_driver); 351 } 352 subsys_initcall(s2mps11_pmic_init); 353 354 static void __exit s2mps11_pmic_exit(void) 355 { 356 platform_driver_unregister(&s2mps11_pmic_driver); 357 } 358 module_exit(s2mps11_pmic_exit); 359 360 /* Module information */ 361 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 362 MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver"); 363 MODULE_LICENSE("GPL"); 364