568 lines · c
1// SPDX-License-Identifier: GPL-2.0+2//3// max77802.c - Regulator driver for the Maxim 778024//5// Copyright (C) 2013-2014 Google, Inc6// Simon Glass <sjg@chromium.org>7//8// Copyright (C) 2012 Samsung Electronics9// Chiwoong Byun <woong.byun@samsung.com>10// Jonghwa Lee <jonghwa3.lee@samsung.com>11//12// This driver is based on max8997.c13 14#include <linux/kernel.h>15#include <linux/bug.h>16#include <linux/err.h>17#include <linux/slab.h>18#include <linux/module.h>19#include <linux/platform_device.h>20#include <linux/regulator/driver.h>21#include <linux/regulator/machine.h>22#include <linux/regulator/of_regulator.h>23#include <linux/mfd/max77686.h>24#include <linux/mfd/max77686-private.h>25#include <dt-bindings/regulator/maxim,max77802.h>26 27/* Default ramp delay in case it is not manually set */28#define MAX77802_RAMP_DELAY 100000 /* uV/us */29 30#define MAX77802_OPMODE_SHIFT_LDO 631#define MAX77802_OPMODE_BUCK234_SHIFT 432#define MAX77802_OPMODE_MASK 0x333 34#define MAX77802_VSEL_MASK 0x3F35#define MAX77802_DVS_VSEL_MASK 0xFF36 37#define MAX77802_RAMP_RATE_MASK_2BIT 0xC038#define MAX77802_RAMP_RATE_SHIFT_2BIT 639#define MAX77802_RAMP_RATE_MASK_4BIT 0xF040#define MAX77802_RAMP_RATE_SHIFT_4BIT 441 42#define MAX77802_STATUS_OFF 0x043#define MAX77802_OFF_PWRREQ 0x144#define MAX77802_LP_PWRREQ 0x245 46static const unsigned int max77802_buck234_ramp_table[] = {47 12500,48 25000,49 50000,50 100000,51};52 53static const unsigned int max77802_buck16_ramp_table[] = {54 1000, 2000, 3030, 4000,55 5000, 5880, 7140, 8330,56 9090, 10000, 11110, 12500,57 16670, 25000, 50000, 100000,58};59 60struct max77802_regulator_prv {61 /* Array indexed by regulator id */62 unsigned int opmode[MAX77802_REG_MAX];63};64 65static inline unsigned int max77802_map_mode(unsigned int mode)66{67 return mode == MAX77802_OPMODE_NORMAL ?68 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;69}70 71static int max77802_get_opmode_shift(int id)72{73 if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&74 id <= MAX77802_BUCK10))75 return 0;76 77 if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)78 return MAX77802_OPMODE_BUCK234_SHIFT;79 80 if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)81 return MAX77802_OPMODE_SHIFT_LDO;82 83 return -EINVAL;84}85 86/**87 * max77802_set_suspend_disable - Disable the regulator during system suspend88 * @rdev: regulator to mark as disabled89 *90 * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.91 * Configure the regulator so the PMIC will turn it OFF during system suspend.92 */93static int max77802_set_suspend_disable(struct regulator_dev *rdev)94{95 unsigned int val = MAX77802_OFF_PWRREQ;96 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);97 unsigned int id = rdev_get_id(rdev);98 int shift = max77802_get_opmode_shift(id);99 100 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))101 return -EINVAL;102 max77802->opmode[id] = val;103 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,104 rdev->desc->enable_mask, val << shift);105}106 107/*108 * Some LDOs support Low Power Mode while the system is running.109 *110 * LDOs 1, 3, 20, 21.111 */112static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)113{114 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);115 unsigned int id = rdev_get_id(rdev);116 unsigned int val;117 int shift = max77802_get_opmode_shift(id);118 119 switch (mode) {120 case REGULATOR_MODE_STANDBY:121 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */122 break;123 case REGULATOR_MODE_NORMAL:124 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */125 break;126 default:127 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",128 rdev->desc->name, mode);129 return -EINVAL;130 }131 132 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))133 return -EINVAL;134 135 max77802->opmode[id] = val;136 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,137 rdev->desc->enable_mask, val << shift);138}139 140static unsigned max77802_get_mode(struct regulator_dev *rdev)141{142 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);143 unsigned int id = rdev_get_id(rdev);144 145 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))146 return -EINVAL;147 return max77802_map_mode(max77802->opmode[id]);148}149 150/**151 * max77802_set_suspend_mode - set regulator opmode when the system is suspended152 * @rdev: regulator to change mode153 * @mode: operating mode to be set154 *155 * Will set the operating mode for the regulators during system suspend.156 * This function is valid for the three different enable control logics:157 *158 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)159 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)160 * Enable Control Logic3 by PWRREQ (LDO 3)161 *162 * If setting the regulator mode fails, the function only warns but does163 * not return a negative error number to avoid the regulator core to stop164 * setting the operating mode for the remaining regulators.165 */166static int max77802_set_suspend_mode(struct regulator_dev *rdev,167 unsigned int mode)168{169 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);170 unsigned int id = rdev_get_id(rdev);171 unsigned int val;172 int shift = max77802_get_opmode_shift(id);173 174 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))175 return -EINVAL;176 177 /*178 * If the regulator has been disabled for suspend179 * then is invalid to try setting a suspend mode.180 */181 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {182 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",183 rdev->desc->name, mode);184 return 0;185 }186 187 switch (mode) {188 case REGULATOR_MODE_STANDBY:189 /*190 * If the regulator opmode is normal then enable191 * ON in Low Power Mode by PWRREQ. If the mode is192 * already Low Power then no action is required.193 */194 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)195 val = MAX77802_LP_PWRREQ;196 else197 return 0;198 break;199 case REGULATOR_MODE_NORMAL:200 /*201 * If the regulator operating mode is Low Power then202 * normal is not a valid opmode in suspend. If the203 * mode is already normal then no action is required.204 */205 if (max77802->opmode[id] == MAX77802_OPMODE_LP)206 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",207 rdev->desc->name, mode);208 return 0;209 default:210 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",211 rdev->desc->name, mode);212 return -EINVAL;213 }214 215 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,216 rdev->desc->enable_mask, val << shift);217}218 219static int max77802_enable(struct regulator_dev *rdev)220{221 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);222 unsigned int id = rdev_get_id(rdev);223 int shift = max77802_get_opmode_shift(id);224 225 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))226 return -EINVAL;227 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)228 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;229 230 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,231 rdev->desc->enable_mask,232 max77802->opmode[id] << shift);233}234 235/*236 * LDOs 2, 4-19, 22-35237 */238static const struct regulator_ops max77802_ldo_ops_logic1 = {239 .list_voltage = regulator_list_voltage_linear,240 .map_voltage = regulator_map_voltage_linear,241 .is_enabled = regulator_is_enabled_regmap,242 .enable = max77802_enable,243 .disable = regulator_disable_regmap,244 .get_voltage_sel = regulator_get_voltage_sel_regmap,245 .set_voltage_sel = regulator_set_voltage_sel_regmap,246 .set_voltage_time_sel = regulator_set_voltage_time_sel,247 .set_suspend_disable = max77802_set_suspend_disable,248 .set_suspend_mode = max77802_set_suspend_mode,249};250 251/*252 * LDOs 1, 20, 21, 3253 */254static const struct regulator_ops max77802_ldo_ops_logic2 = {255 .list_voltage = regulator_list_voltage_linear,256 .map_voltage = regulator_map_voltage_linear,257 .is_enabled = regulator_is_enabled_regmap,258 .enable = max77802_enable,259 .disable = regulator_disable_regmap,260 .get_voltage_sel = regulator_get_voltage_sel_regmap,261 .set_voltage_sel = regulator_set_voltage_sel_regmap,262 .set_voltage_time_sel = regulator_set_voltage_time_sel,263 .set_mode = max77802_set_mode,264 .get_mode = max77802_get_mode,265 .set_suspend_mode = max77802_set_suspend_mode,266};267 268/* BUCKS 1, 6 */269static const struct regulator_ops max77802_buck_16_dvs_ops = {270 .list_voltage = regulator_list_voltage_linear,271 .map_voltage = regulator_map_voltage_linear,272 .is_enabled = regulator_is_enabled_regmap,273 .enable = max77802_enable,274 .disable = regulator_disable_regmap,275 .get_voltage_sel = regulator_get_voltage_sel_regmap,276 .set_voltage_sel = regulator_set_voltage_sel_regmap,277 .set_voltage_time_sel = regulator_set_voltage_time_sel,278 .set_ramp_delay = regulator_set_ramp_delay_regmap,279 .set_suspend_disable = max77802_set_suspend_disable,280};281 282/* BUCKs 2-4 */283static const struct regulator_ops max77802_buck_234_ops = {284 .list_voltage = regulator_list_voltage_linear,285 .map_voltage = regulator_map_voltage_linear,286 .is_enabled = regulator_is_enabled_regmap,287 .enable = max77802_enable,288 .disable = regulator_disable_regmap,289 .get_voltage_sel = regulator_get_voltage_sel_regmap,290 .set_voltage_sel = regulator_set_voltage_sel_regmap,291 .set_voltage_time_sel = regulator_set_voltage_time_sel,292 .set_ramp_delay = regulator_set_ramp_delay_regmap,293 .set_suspend_disable = max77802_set_suspend_disable,294 .set_suspend_mode = max77802_set_suspend_mode,295};296 297/* BUCKs 5, 7-10 */298static const struct regulator_ops max77802_buck_dvs_ops = {299 .list_voltage = regulator_list_voltage_linear,300 .map_voltage = regulator_map_voltage_linear,301 .is_enabled = regulator_is_enabled_regmap,302 .enable = max77802_enable,303 .disable = regulator_disable_regmap,304 .get_voltage_sel = regulator_get_voltage_sel_regmap,305 .set_voltage_sel = regulator_set_voltage_sel_regmap,306 .set_voltage_time_sel = regulator_set_voltage_time_sel,307 .set_suspend_disable = max77802_set_suspend_disable,308};309 310/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */311#define regulator_77802_desc_p_ldo(num, supply, log) { \312 .name = "LDO"#num, \313 .of_match = of_match_ptr("LDO"#num), \314 .regulators_node = of_match_ptr("regulators"), \315 .id = MAX77802_LDO##num, \316 .supply_name = "inl"#supply, \317 .ops = &max77802_ldo_ops_logic##log, \318 .type = REGULATOR_VOLTAGE, \319 .owner = THIS_MODULE, \320 .min_uV = 800000, \321 .uV_step = 50000, \322 .ramp_delay = MAX77802_RAMP_DELAY, \323 .n_voltages = 1 << 6, \324 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \325 .vsel_mask = MAX77802_VSEL_MASK, \326 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \327 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \328 .of_map_mode = max77802_map_mode, \329}330 331/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */332#define regulator_77802_desc_n_ldo(num, supply, log) { \333 .name = "LDO"#num, \334 .of_match = of_match_ptr("LDO"#num), \335 .regulators_node = of_match_ptr("regulators"), \336 .id = MAX77802_LDO##num, \337 .supply_name = "inl"#supply, \338 .ops = &max77802_ldo_ops_logic##log, \339 .type = REGULATOR_VOLTAGE, \340 .owner = THIS_MODULE, \341 .min_uV = 800000, \342 .uV_step = 25000, \343 .ramp_delay = MAX77802_RAMP_DELAY, \344 .n_voltages = 1 << 6, \345 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \346 .vsel_mask = MAX77802_VSEL_MASK, \347 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \348 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \349 .of_map_mode = max77802_map_mode, \350}351 352/* BUCKs 1, 6 */353#define regulator_77802_desc_16_buck(num) { \354 .name = "BUCK"#num, \355 .of_match = of_match_ptr("BUCK"#num), \356 .regulators_node = of_match_ptr("regulators"), \357 .id = MAX77802_BUCK##num, \358 .supply_name = "inb"#num, \359 .ops = &max77802_buck_16_dvs_ops, \360 .type = REGULATOR_VOLTAGE, \361 .owner = THIS_MODULE, \362 .min_uV = 612500, \363 .uV_step = 6250, \364 .ramp_delay = MAX77802_RAMP_DELAY, \365 .n_voltages = 1 << 8, \366 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \367 .vsel_mask = MAX77802_DVS_VSEL_MASK, \368 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \369 .enable_mask = MAX77802_OPMODE_MASK, \370 .ramp_reg = MAX77802_REG_BUCK ## num ## CTRL, \371 .ramp_mask = MAX77802_RAMP_RATE_MASK_4BIT, \372 .ramp_delay_table = max77802_buck16_ramp_table, \373 .n_ramp_values = ARRAY_SIZE(max77802_buck16_ramp_table), \374 .of_map_mode = max77802_map_mode, \375}376 377/* BUCKS 2-4 */378#define regulator_77802_desc_234_buck(num) { \379 .name = "BUCK"#num, \380 .of_match = of_match_ptr("BUCK"#num), \381 .regulators_node = of_match_ptr("regulators"), \382 .id = MAX77802_BUCK##num, \383 .supply_name = "inb"#num, \384 .ops = &max77802_buck_234_ops, \385 .type = REGULATOR_VOLTAGE, \386 .owner = THIS_MODULE, \387 .min_uV = 600000, \388 .uV_step = 6250, \389 .ramp_delay = MAX77802_RAMP_DELAY, \390 .n_voltages = 0x91, \391 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \392 .vsel_mask = MAX77802_DVS_VSEL_MASK, \393 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \394 .enable_mask = MAX77802_OPMODE_MASK << \395 MAX77802_OPMODE_BUCK234_SHIFT, \396 .ramp_reg = MAX77802_REG_BUCK ## num ## CTRL1, \397 .ramp_mask = MAX77802_RAMP_RATE_MASK_2BIT, \398 .ramp_delay_table = max77802_buck234_ramp_table, \399 .n_ramp_values = ARRAY_SIZE(max77802_buck234_ramp_table), \400 .of_map_mode = max77802_map_mode, \401}402 403/* BUCK 5 */404#define regulator_77802_desc_buck5(num) { \405 .name = "BUCK"#num, \406 .of_match = of_match_ptr("BUCK"#num), \407 .regulators_node = of_match_ptr("regulators"), \408 .id = MAX77802_BUCK##num, \409 .supply_name = "inb"#num, \410 .ops = &max77802_buck_dvs_ops, \411 .type = REGULATOR_VOLTAGE, \412 .owner = THIS_MODULE, \413 .min_uV = 750000, \414 .uV_step = 50000, \415 .ramp_delay = MAX77802_RAMP_DELAY, \416 .n_voltages = 1 << 6, \417 .vsel_reg = MAX77802_REG_BUCK5OUT, \418 .vsel_mask = MAX77802_VSEL_MASK, \419 .enable_reg = MAX77802_REG_BUCK5CTRL, \420 .enable_mask = MAX77802_OPMODE_MASK, \421 .of_map_mode = max77802_map_mode, \422}423 424/* BUCKs 7-10 */425#define regulator_77802_desc_buck7_10(num) { \426 .name = "BUCK"#num, \427 .of_match = of_match_ptr("BUCK"#num), \428 .regulators_node = of_match_ptr("regulators"), \429 .id = MAX77802_BUCK##num, \430 .supply_name = "inb"#num, \431 .ops = &max77802_buck_dvs_ops, \432 .type = REGULATOR_VOLTAGE, \433 .owner = THIS_MODULE, \434 .min_uV = 750000, \435 .uV_step = 50000, \436 .ramp_delay = MAX77802_RAMP_DELAY, \437 .n_voltages = 1 << 6, \438 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \439 .vsel_mask = MAX77802_VSEL_MASK, \440 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \441 .enable_mask = MAX77802_OPMODE_MASK, \442 .of_map_mode = max77802_map_mode, \443}444 445static const struct regulator_desc regulators[] = {446 regulator_77802_desc_16_buck(1),447 regulator_77802_desc_234_buck(2),448 regulator_77802_desc_234_buck(3),449 regulator_77802_desc_234_buck(4),450 regulator_77802_desc_buck5(5),451 regulator_77802_desc_16_buck(6),452 regulator_77802_desc_buck7_10(7),453 regulator_77802_desc_buck7_10(8),454 regulator_77802_desc_buck7_10(9),455 regulator_77802_desc_buck7_10(10),456 regulator_77802_desc_n_ldo(1, 10, 2),457 regulator_77802_desc_n_ldo(2, 10, 1),458 regulator_77802_desc_p_ldo(3, 3, 2),459 regulator_77802_desc_p_ldo(4, 6, 1),460 regulator_77802_desc_p_ldo(5, 3, 1),461 regulator_77802_desc_p_ldo(6, 3, 1),462 regulator_77802_desc_p_ldo(7, 3, 1),463 regulator_77802_desc_n_ldo(8, 1, 1),464 regulator_77802_desc_p_ldo(9, 5, 1),465 regulator_77802_desc_p_ldo(10, 4, 1),466 regulator_77802_desc_p_ldo(11, 4, 1),467 regulator_77802_desc_p_ldo(12, 9, 1),468 regulator_77802_desc_p_ldo(13, 4, 1),469 regulator_77802_desc_p_ldo(14, 4, 1),470 regulator_77802_desc_n_ldo(15, 1, 1),471 regulator_77802_desc_n_ldo(17, 2, 1),472 regulator_77802_desc_p_ldo(18, 7, 1),473 regulator_77802_desc_p_ldo(19, 5, 1),474 regulator_77802_desc_p_ldo(20, 7, 2),475 regulator_77802_desc_p_ldo(21, 6, 2),476 regulator_77802_desc_p_ldo(23, 9, 1),477 regulator_77802_desc_p_ldo(24, 6, 1),478 regulator_77802_desc_p_ldo(25, 9, 1),479 regulator_77802_desc_p_ldo(26, 9, 1),480 regulator_77802_desc_n_ldo(27, 2, 1),481 regulator_77802_desc_p_ldo(28, 7, 1),482 regulator_77802_desc_p_ldo(29, 7, 1),483 regulator_77802_desc_n_ldo(30, 2, 1),484 regulator_77802_desc_p_ldo(32, 9, 1),485 regulator_77802_desc_p_ldo(33, 6, 1),486 regulator_77802_desc_p_ldo(34, 9, 1),487 regulator_77802_desc_n_ldo(35, 2, 1),488};489 490static int max77802_pmic_probe(struct platform_device *pdev)491{492 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);493 struct max77802_regulator_prv *max77802;494 int i, val;495 struct regulator_config config = { };496 497 max77802 = devm_kzalloc(&pdev->dev,498 sizeof(struct max77802_regulator_prv),499 GFP_KERNEL);500 if (!max77802)501 return -ENOMEM;502 503 config.dev = iodev->dev;504 config.regmap = iodev->regmap;505 config.driver_data = max77802;506 platform_set_drvdata(pdev, max77802);507 508 for (i = 0; i < MAX77802_REG_MAX; i++) {509 struct regulator_dev *rdev;510 unsigned int id = regulators[i].id;511 int shift = max77802_get_opmode_shift(id);512 int ret;513 514 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);515 if (ret < 0) {516 dev_warn(&pdev->dev,517 "cannot read current mode for %d\n", i);518 val = MAX77802_OPMODE_NORMAL;519 } else {520 val = val >> shift & MAX77802_OPMODE_MASK;521 }522 523 /*524 * If the regulator is disabled and the system warm rebooted,525 * the hardware reports OFF as the regulator operating mode.526 * Default to operating mode NORMAL in that case.527 */528 if (id < ARRAY_SIZE(max77802->opmode)) {529 if (val == MAX77802_STATUS_OFF)530 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;531 else532 max77802->opmode[id] = val;533 }534 535 rdev = devm_regulator_register(&pdev->dev,536 ®ulators[i], &config);537 if (IS_ERR(rdev)) {538 ret = PTR_ERR(rdev);539 dev_err(&pdev->dev,540 "regulator init failed for %d: %d\n", i, ret);541 return ret;542 }543 }544 545 return 0;546}547 548static const struct platform_device_id max77802_pmic_id[] = {549 {"max77802-pmic", 0},550 { },551};552MODULE_DEVICE_TABLE(platform, max77802_pmic_id);553 554static struct platform_driver max77802_pmic_driver = {555 .driver = {556 .name = "max77802-pmic",557 .probe_type = PROBE_PREFER_ASYNCHRONOUS,558 },559 .probe = max77802_pmic_probe,560 .id_table = max77802_pmic_id,561};562 563module_platform_driver(max77802_pmic_driver);564 565MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");566MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");567MODULE_LICENSE("GPL");568