tps65912-regulator.c 12.3 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
/*
 * tps65912.c  --  TI tps65912
 *
 * Copyright 2011 Texas Instruments Inc.
 *
 * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under  the terms of the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the License, or (at your
 *  option) any later version.
 *
 * This driver is based on wm8350 implementation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/mfd/tps65912.h>

/* DCDC's */
#define TPS65912_REG_DCDC1	0
#define TPS65912_REG_DCDC2	1
#define TPS65912_REG_DCDC3	2
#define TPS65912_REG_DCDC4	3

/* LDOs */
#define TPS65912_REG_LDO1	4
#define TPS65912_REG_LDO2	5
#define TPS65912_REG_LDO3	6
#define TPS65912_REG_LDO4	7
#define TPS65912_REG_LDO5	8
#define TPS65912_REG_LDO6	9
#define TPS65912_REG_LDO7	10
#define TPS65912_REG_LDO8	11
#define TPS65912_REG_LDO9	12
#define TPS65912_REG_LDO10	13

/* Number of step-down converters available */
#define TPS65912_NUM_DCDC	4

/* Number of LDO voltage regulators  available */
#define TPS65912_NUM_LDO	10

/* Number of total regulators available */
#define TPS65912_NUM_REGULATOR		(TPS65912_NUM_DCDC + TPS65912_NUM_LDO)

#define TPS65912_REG_ENABLED	0x80
#define OP_SELREG_MASK		0x40
#define OP_SELREG_SHIFT		6

struct tps_info {
	const char *name;
};

static struct tps_info tps65912_regs[] = {
	{
		.name = "DCDC1",
	},
	{
		.name = "DCDC2",
	},
	{
		.name = "DCDC3",
	},
	{
		.name = "DCDC4",
	},
	{
		.name = "LDO1",
	},
	{
		.name = "LDO2",
	},
	{
		.name = "LDO3",
	},
	{
		.name = "LDO4",
	},
	{
		.name = "LDO5",
	},
	{
		.name = "LDO6",
	},
	{
		.name = "LDO7",
	},
	{
		.name = "LDO8",
	},
	{
		.name = "LDO9",
	},
	{
		.name = "LDO10",
	},
};

struct tps65912_reg {
	struct regulator_desc desc[TPS65912_NUM_REGULATOR];
	struct tps65912 *mfd;
	struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
	struct tps_info *info[TPS65912_NUM_REGULATOR];
	/* for read/write access */
	struct mutex io_lock;
	int mode;
	int (*get_ctrl_reg)(int);
	int dcdc_range[TPS65912_NUM_DCDC];
	int pwm_mode_reg;
	int eco_reg;
};

static const struct regulator_linear_range tps65912_ldo_ranges[] = {
	REGULATOR_LINEAR_RANGE(800000, 0, 32, 25000),
	REGULATOR_LINEAR_RANGE(1650000, 33, 60, 50000),
	REGULATOR_LINEAR_RANGE(3100000, 61, 63, 100000),
};

static int tps65912_get_range(struct tps65912_reg *pmic, int id)
{
	struct tps65912 *mfd = pmic->mfd;
	int range;

	switch (id) {
	case TPS65912_REG_DCDC1:
		range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT);
		break;
	case TPS65912_REG_DCDC2:
		range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT);
		break;
	case TPS65912_REG_DCDC3:
		range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT);
		break;
	case TPS65912_REG_DCDC4:
		range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT);
		break;
	default:
		return 0;
	}

	if (range >= 0)
		range = (range & DCDC_LIMIT_RANGE_MASK)
			>> DCDC_LIMIT_RANGE_SHIFT;

	pmic->dcdc_range[id] = range;
	return range;
}

static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
{
	unsigned long uv;

	uv = ((vsel * 12500) + 500000);
	return uv;
}

static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
{
	unsigned long uv;

	 uv = ((vsel * 12500) + 700000);
	return uv;
}

static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
{
	unsigned long uv;

	uv = ((vsel * 25000) + 500000);
	return uv;
}

static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
{
	unsigned long uv;

	if (vsel == 0x3f)
		uv = 3800000;
	else
		uv = ((vsel * 50000) + 500000);

	return uv;
}

static int tps65912_get_ctrl_register(int id)
{
	if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
		return id * 3 + TPS65912_DCDC1_AVS;
	else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
		return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
	else
		return -EINVAL;
}

static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
{
	struct tps65912 *mfd = pmic->mfd;
	int opvsel;
	u8 reg = 0;

	if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
		opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
		if (opvsel & OP_SELREG_MASK)
			reg = id * 3 + TPS65912_DCDC1_AVS;
		else
			reg = id * 3 + TPS65912_DCDC1_OP;
	} else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
		reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
	} else {
		return -EINVAL;
	}

	return reg;
}

static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
{
	switch (id) {
	case TPS65912_REG_DCDC1:
		pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
		pmic->eco_reg = TPS65912_DCDC1_AVS;
		break;
	case TPS65912_REG_DCDC2:
		pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
		pmic->eco_reg = TPS65912_DCDC2_AVS;
		break;
	case TPS65912_REG_DCDC3:
		pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
		pmic->eco_reg = TPS65912_DCDC3_AVS;
		break;
	case TPS65912_REG_DCDC4:
		pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
		pmic->eco_reg = TPS65912_DCDC4_AVS;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int tps65912_reg_is_enabled(struct regulator_dev *dev)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int reg, value, id = rdev_get_id(dev);

	if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
		return -EINVAL;

	reg = pmic->get_ctrl_reg(id);
	if (reg < 0)
		return reg;

	value = tps65912_reg_read(mfd, reg);
	if (value < 0)
		return value;

	return value & TPS65912_REG_ENABLED;
}

static int tps65912_reg_enable(struct regulator_dev *dev)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int id = rdev_get_id(dev);
	int reg;

	if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
		return -EINVAL;

	reg = pmic->get_ctrl_reg(id);
	if (reg < 0)
		return reg;

	return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
}

static int tps65912_reg_disable(struct regulator_dev *dev)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int id = rdev_get_id(dev), reg;

	reg = pmic->get_ctrl_reg(id);
	if (reg < 0)
		return reg;

	return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
}

static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int pwm_mode, eco, id = rdev_get_id(dev);

	tps65912_get_mode_regiters(pmic, id);

	pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
	eco = tps65912_reg_read(mfd, pmic->eco_reg);

	pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
	eco &= DCDC_AVS_ECO_MASK;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		/* Verify if mode alredy set */
		if (pwm_mode && !eco)
			break;
		tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
		tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
		break;
	case REGULATOR_MODE_NORMAL:
	case REGULATOR_MODE_IDLE:
		if (!pwm_mode && !eco)
			break;
		tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
		tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
		break;
	case REGULATOR_MODE_STANDBY:
		if (!pwm_mode && eco)
			break;
		tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
		tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static unsigned int tps65912_get_mode(struct regulator_dev *dev)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);

	tps65912_get_mode_regiters(pmic, id);

	pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
	eco = tps65912_reg_read(mfd, pmic->eco_reg);

	pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
	eco &= DCDC_AVS_ECO_MASK;

	if (pwm_mode && !eco)
		mode = REGULATOR_MODE_FAST;
	else if (!pwm_mode && !eco)
		mode = REGULATOR_MODE_NORMAL;
	else if (!pwm_mode && eco)
		mode = REGULATOR_MODE_STANDBY;

	return mode;
}

static int tps65912_list_voltage(struct regulator_dev *dev, unsigned selector)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	int range, voltage = 0, id = rdev_get_id(dev);

	if (id > TPS65912_REG_DCDC4)
		return -EINVAL;

	range = pmic->dcdc_range[id];

	switch (range) {
	case 0:
		/* 0.5 - 1.2875V in 12.5mV steps */
		voltage = tps65912_vsel_to_uv_range0(selector);
		break;
	case 1:
		/* 0.7 - 1.4875V in 12.5mV steps */
		voltage = tps65912_vsel_to_uv_range1(selector);
		break;
	case 2:
		/* 0.5 - 2.075V in 25mV steps */
		voltage = tps65912_vsel_to_uv_range2(selector);
		break;
	case 3:
		/* 0.5 - 3.8V in 50mV steps */
		voltage = tps65912_vsel_to_uv_range3(selector);
		break;
	}
	return voltage;
}

static int tps65912_get_voltage_sel(struct regulator_dev *dev)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int id = rdev_get_id(dev);
	int reg, vsel;

	reg = tps65912_get_sel_register(pmic, id);
	if (reg < 0)
		return reg;

	vsel = tps65912_reg_read(mfd, reg);
	vsel &= 0x3F;

	return vsel;
}

static int tps65912_set_voltage_sel(struct regulator_dev *dev,
					 unsigned selector)
{
	struct tps65912_reg *pmic = rdev_get_drvdata(dev);
	struct tps65912 *mfd = pmic->mfd;
	int id = rdev_get_id(dev);
	int value;
	u8 reg;

	reg = tps65912_get_sel_register(pmic, id);
	value = tps65912_reg_read(mfd, reg);
	value &= 0xC0;
	return tps65912_reg_write(mfd, reg, selector | value);
}

/* Operations permitted on DCDCx */
static struct regulator_ops tps65912_ops_dcdc = {
	.is_enabled = tps65912_reg_is_enabled,
	.enable = tps65912_reg_enable,
	.disable = tps65912_reg_disable,
	.set_mode = tps65912_set_mode,
	.get_mode = tps65912_get_mode,
	.get_voltage_sel = tps65912_get_voltage_sel,
	.set_voltage_sel = tps65912_set_voltage_sel,
	.list_voltage = tps65912_list_voltage,
};

/* Operations permitted on LDOx */
static struct regulator_ops tps65912_ops_ldo = {
	.is_enabled = tps65912_reg_is_enabled,
	.enable = tps65912_reg_enable,
	.disable = tps65912_reg_disable,
	.get_voltage_sel = tps65912_get_voltage_sel,
	.set_voltage_sel = tps65912_set_voltage_sel,
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
};

static int tps65912_probe(struct platform_device *pdev)
{
	struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
	struct regulator_config config = { };
	struct tps_info *info;
	struct regulator_init_data *reg_data;
	struct regulator_dev *rdev;
	struct tps65912_reg *pmic;
	struct tps65912_board *pmic_plat_data;
	int i;

	pmic_plat_data = dev_get_platdata(tps65912->dev);
	if (!pmic_plat_data)
		return -EINVAL;

	reg_data = pmic_plat_data->tps65912_pmic_init_data;

	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
	if (!pmic)
		return -ENOMEM;

	mutex_init(&pmic->io_lock);
	pmic->mfd = tps65912;
	platform_set_drvdata(pdev, pmic);

	pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
	info = tps65912_regs;

	for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
		int range = 0;
		/* Register the regulators */
		pmic->info[i] = info;

		pmic->desc[i].name = info->name;
		pmic->desc[i].id = i;
		pmic->desc[i].n_voltages = 64;
		if (i > TPS65912_REG_DCDC4) {
			pmic->desc[i].ops = &tps65912_ops_ldo;
			pmic->desc[i].linear_ranges = tps65912_ldo_ranges;
			pmic->desc[i].n_linear_ranges =
					ARRAY_SIZE(tps65912_ldo_ranges);
		} else {
			pmic->desc[i].ops = &tps65912_ops_dcdc;
		}
		pmic->desc[i].type = REGULATOR_VOLTAGE;
		pmic->desc[i].owner = THIS_MODULE;
		range = tps65912_get_range(pmic, i);

		config.dev = tps65912->dev;
		config.init_data = reg_data;
		config.driver_data = pmic;

		rdev = devm_regulator_register(&pdev->dev, &pmic->desc[i],
					       &config);
		if (IS_ERR(rdev)) {
			dev_err(tps65912->dev,
				"failed to register %s regulator\n",
				pdev->name);
			return PTR_ERR(rdev);
		}

		/* Save regulator for cleanup */
		pmic->rdev[i] = rdev;
	}
	return 0;
}

static struct platform_driver tps65912_driver = {
	.driver = {
		.name = "tps65912-pmic",
	},
	.probe = tps65912_probe,
};

static int __init tps65912_init(void)
{
	return platform_driver_register(&tps65912_driver);
}
subsys_initcall(tps65912_init);

static void __exit tps65912_cleanup(void)
{
	platform_driver_unregister(&tps65912_driver);
}
module_exit(tps65912_cleanup);

MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65912-pmic");