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0001 // SPDX-License-Identifier: GPL-2.0
0002 //
0003 // MCP16502 PMIC driver
0004 //
0005 // Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries
0006 //
0007 // Author: Andrei Stefanescu <andrei.stefanescu@microchip.com>
0008 //
0009 // Inspired from tps65086-regulator.c
0010 
0011 #include <linux/gpio.h>
0012 #include <linux/i2c.h>
0013 #include <linux/init.h>
0014 #include <linux/kernel.h>
0015 #include <linux/module.h>
0016 #include <linux/of.h>
0017 #include <linux/regmap.h>
0018 #include <linux/regulator/driver.h>
0019 #include <linux/suspend.h>
0020 #include <linux/gpio/consumer.h>
0021 
0022 #define VDD_LOW_SEL 0x0D
0023 #define VDD_HIGH_SEL 0x3F
0024 
0025 #define MCP16502_FLT        BIT(7)
0026 #define MCP16502_DVSR       GENMASK(3, 2)
0027 #define MCP16502_ENS        BIT(0)
0028 
0029 /*
0030  * The PMIC has four sets of registers corresponding to four power modes:
0031  * Performance, Active, Low-power, Hibernate.
0032  *
0033  * Registers:
0034  * Each regulator has a register for each power mode. To access a register
0035  * for a specific regulator and mode BASE_* and OFFSET_* need to be added.
0036  *
0037  * Operating modes:
0038  * In order for the PMIC to transition to operating modes it has to be
0039  * controlled via GPIO lines called LPM and HPM.
0040  *
0041  * The registers are fully configurable such that you can put all regulators in
0042  * a low-power state while the PMIC is in Active mode. They are supposed to be
0043  * configured at startup and then simply transition to/from a global low-power
0044  * state by setting the GPIO lpm pin high/low.
0045  *
0046  * This driver keeps the PMIC in Active mode, Low-power state is set for the
0047  * regulators by enabling/disabling operating mode (FPWM or Auto PFM).
0048  *
0049  * The PMIC's Low-power and Hibernate modes are used during standby/suspend.
0050  * To enter standby/suspend the PMIC will go to Low-power mode. From there, it
0051  * will transition to Hibernate when the PWRHLD line is set to low by the MPU.
0052  */
0053 
0054 /*
0055  * This function is useful for iterating over all regulators and accessing their
0056  * registers in a generic way or accessing a regulator device by its id.
0057  */
0058 #define MCP16502_REG_BASE(i, r) ((((i) + 1) << 4) + MCP16502_REG_##r)
0059 #define MCP16502_STAT_BASE(i) ((i) + 5)
0060 
0061 #define MCP16502_OPMODE_ACTIVE REGULATOR_MODE_NORMAL
0062 #define MCP16502_OPMODE_LPM REGULATOR_MODE_IDLE
0063 #define MCP16502_OPMODE_HIB REGULATOR_MODE_STANDBY
0064 
0065 #define MCP16502_MODE_AUTO_PFM 0
0066 #define MCP16502_MODE_FPWM BIT(6)
0067 
0068 #define MCP16502_VSEL 0x3F
0069 #define MCP16502_EN BIT(7)
0070 #define MCP16502_MODE BIT(6)
0071 
0072 #define MCP16502_MIN_REG 0x0
0073 #define MCP16502_MAX_REG 0x65
0074 
0075 /**
0076  * enum mcp16502_reg - MCP16502 regulators's registers
0077  * @MCP16502_REG_A: active state register
0078  * @MCP16502_REG_LPM: low power mode state register
0079  * @MCP16502_REG_HIB: hibernate state register
0080  * @MCP16502_REG_SEQ: startup sequence register
0081  * @MCP16502_REG_CFG: configuration register
0082  */
0083 enum mcp16502_reg {
0084     MCP16502_REG_A,
0085     MCP16502_REG_LPM,
0086     MCP16502_REG_HIB,
0087     MCP16502_REG_HPM,
0088     MCP16502_REG_SEQ,
0089     MCP16502_REG_CFG,
0090 };
0091 
0092 /* Ramp delay (uV/us) for buck1, ldo1, ldo2. */
0093 static const unsigned int mcp16502_ramp_b1l12[] = {
0094     6250, 3125, 2083, 1563
0095 };
0096 
0097 /* Ramp delay (uV/us) for buck2, buck3, buck4. */
0098 static const unsigned int mcp16502_ramp_b234[] = {
0099     3125, 1563, 1042, 781
0100 };
0101 
0102 static unsigned int mcp16502_of_map_mode(unsigned int mode)
0103 {
0104     if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE)
0105         return mode;
0106 
0107     return REGULATOR_MODE_INVALID;
0108 }
0109 
0110 #define MCP16502_REGULATOR(_name, _id, _ranges, _ops, _ramp_table)  \
0111     [_id] = {                           \
0112         .name           = _name,            \
0113         .regulators_node    = of_match_ptr("regulators"),   \
0114         .id         = _id,              \
0115         .ops            = &(_ops),          \
0116         .type           = REGULATOR_VOLTAGE,        \
0117         .owner          = THIS_MODULE,          \
0118         .n_voltages     = MCP16502_VSEL + 1,        \
0119         .linear_ranges      = _ranges,          \
0120         .linear_min_sel     = VDD_LOW_SEL,          \
0121         .n_linear_ranges    = ARRAY_SIZE(_ranges),      \
0122         .of_match       = of_match_ptr(_name),      \
0123         .of_map_mode        = mcp16502_of_map_mode,     \
0124         .vsel_reg       = (((_id) + 1) << 4),       \
0125         .vsel_mask      = MCP16502_VSEL,        \
0126         .enable_reg     = (((_id) + 1) << 4),       \
0127         .enable_mask        = MCP16502_EN,          \
0128         .ramp_reg       = MCP16502_REG_BASE(_id, CFG),  \
0129         .ramp_mask      = MCP16502_DVSR,        \
0130         .ramp_delay_table   = _ramp_table,          \
0131         .n_ramp_values      = ARRAY_SIZE(_ramp_table),  \
0132     }
0133 
0134 enum {
0135     BUCK1 = 0,
0136     BUCK2,
0137     BUCK3,
0138     BUCK4,
0139     LDO1,
0140     LDO2,
0141     NUM_REGULATORS
0142 };
0143 
0144 /*
0145  * struct mcp16502 - PMIC representation
0146  * @lpm: LPM GPIO descriptor
0147  */
0148 struct mcp16502 {
0149     struct gpio_desc *lpm;
0150 };
0151 
0152 /*
0153  * mcp16502_gpio_set_mode() - set the GPIO corresponding value
0154  *
0155  * Used to prepare transitioning into hibernate or resuming from it.
0156  */
0157 static void mcp16502_gpio_set_mode(struct mcp16502 *mcp, int mode)
0158 {
0159     switch (mode) {
0160     case MCP16502_OPMODE_ACTIVE:
0161         gpiod_set_value(mcp->lpm, 0);
0162         break;
0163     case MCP16502_OPMODE_LPM:
0164     case MCP16502_OPMODE_HIB:
0165         gpiod_set_value(mcp->lpm, 1);
0166         break;
0167     default:
0168         pr_err("%s: %d invalid\n", __func__, mode);
0169     }
0170 }
0171 
0172 /*
0173  * mcp16502_get_reg() - get the PMIC's state configuration register for opmode
0174  *
0175  * @rdev: the regulator whose register we are searching
0176  * @opmode: the PMIC's operating mode ACTIVE, Low-power, Hibernate
0177  */
0178 static int mcp16502_get_state_reg(struct regulator_dev *rdev, int opmode)
0179 {
0180     switch (opmode) {
0181     case MCP16502_OPMODE_ACTIVE:
0182         return MCP16502_REG_BASE(rdev_get_id(rdev), A);
0183     case MCP16502_OPMODE_LPM:
0184         return MCP16502_REG_BASE(rdev_get_id(rdev), LPM);
0185     case MCP16502_OPMODE_HIB:
0186         return MCP16502_REG_BASE(rdev_get_id(rdev), HIB);
0187     default:
0188         return -EINVAL;
0189     }
0190 }
0191 
0192 /*
0193  * mcp16502_get_mode() - return the current operating mode of a regulator
0194  *
0195  * Note: all functions that are not part of entering/exiting standby/suspend
0196  *   use the Active mode registers.
0197  *
0198  * Note: this is different from the PMIC's operatig mode, it is the
0199  *   MODE bit from the regulator's register.
0200  */
0201 static unsigned int mcp16502_get_mode(struct regulator_dev *rdev)
0202 {
0203     unsigned int val;
0204     int ret, reg;
0205 
0206     reg = mcp16502_get_state_reg(rdev, MCP16502_OPMODE_ACTIVE);
0207     if (reg < 0)
0208         return reg;
0209 
0210     ret = regmap_read(rdev->regmap, reg, &val);
0211     if (ret)
0212         return ret;
0213 
0214     switch (val & MCP16502_MODE) {
0215     case MCP16502_MODE_FPWM:
0216         return REGULATOR_MODE_NORMAL;
0217     case MCP16502_MODE_AUTO_PFM:
0218         return REGULATOR_MODE_IDLE;
0219     default:
0220         return REGULATOR_MODE_INVALID;
0221     }
0222 }
0223 
0224 /*
0225  * _mcp16502_set_mode() - helper for set_mode and set_suspend_mode
0226  *
0227  * @rdev: the regulator for which we are setting the mode
0228  * @mode: the regulator's mode (the one from MODE bit)
0229  * @opmode: the PMIC's operating mode: Active/Low-power/Hibernate
0230  */
0231 static int _mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode,
0232                   unsigned int op_mode)
0233 {
0234     int val;
0235     int reg;
0236 
0237     reg = mcp16502_get_state_reg(rdev, op_mode);
0238     if (reg < 0)
0239         return reg;
0240 
0241     switch (mode) {
0242     case REGULATOR_MODE_NORMAL:
0243         val = MCP16502_MODE_FPWM;
0244         break;
0245     case REGULATOR_MODE_IDLE:
0246         val = MCP16502_MODE_AUTO_PFM;
0247         break;
0248     default:
0249         return -EINVAL;
0250     }
0251 
0252     reg = regmap_update_bits(rdev->regmap, reg, MCP16502_MODE, val);
0253     return reg;
0254 }
0255 
0256 /*
0257  * mcp16502_set_mode() - regulator_ops set_mode
0258  */
0259 static int mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode)
0260 {
0261     return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_ACTIVE);
0262 }
0263 
0264 /*
0265  * mcp16502_get_status() - regulator_ops get_status
0266  */
0267 static int mcp16502_get_status(struct regulator_dev *rdev)
0268 {
0269     int ret;
0270     unsigned int val;
0271 
0272     ret = regmap_read(rdev->regmap, MCP16502_STAT_BASE(rdev_get_id(rdev)),
0273               &val);
0274     if (ret)
0275         return ret;
0276 
0277     if (val & MCP16502_FLT)
0278         return REGULATOR_STATUS_ERROR;
0279     else if (val & MCP16502_ENS)
0280         return REGULATOR_STATUS_ON;
0281     else if (!(val & MCP16502_ENS))
0282         return REGULATOR_STATUS_OFF;
0283 
0284     return REGULATOR_STATUS_UNDEFINED;
0285 }
0286 
0287 static int mcp16502_set_voltage_time_sel(struct regulator_dev *rdev,
0288                      unsigned int old_sel,
0289                      unsigned int new_sel)
0290 {
0291     static const u8 us_ramp[] = { 8, 16, 24, 32 };
0292     int id = rdev_get_id(rdev);
0293     unsigned int uV_delta, val;
0294     int ret;
0295 
0296     ret = regmap_read(rdev->regmap, MCP16502_REG_BASE(id, CFG), &val);
0297     if (ret)
0298         return ret;
0299 
0300     val = (val & MCP16502_DVSR) >> 2;
0301     uV_delta = abs(new_sel * rdev->desc->linear_ranges->step -
0302                old_sel * rdev->desc->linear_ranges->step);
0303     switch (id) {
0304     case BUCK1:
0305     case LDO1:
0306     case LDO2:
0307         ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val],
0308                     mcp16502_ramp_b1l12[val]);
0309         break;
0310 
0311     case BUCK2:
0312     case BUCK3:
0313     case BUCK4:
0314         ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val],
0315                     mcp16502_ramp_b234[val]);
0316         break;
0317 
0318     default:
0319         return -EINVAL;
0320     }
0321 
0322     return ret;
0323 }
0324 
0325 #ifdef CONFIG_SUSPEND
0326 /*
0327  * mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC
0328  *                     mode
0329  */
0330 static int mcp16502_suspend_get_target_reg(struct regulator_dev *rdev)
0331 {
0332     switch (pm_suspend_target_state) {
0333     case PM_SUSPEND_STANDBY:
0334         return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_LPM);
0335     case PM_SUSPEND_ON:
0336     case PM_SUSPEND_MEM:
0337         return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_HIB);
0338     default:
0339         dev_err(&rdev->dev, "invalid suspend target: %d\n",
0340             pm_suspend_target_state);
0341     }
0342 
0343     return -EINVAL;
0344 }
0345 
0346 /*
0347  * mcp16502_set_suspend_voltage() - regulator_ops set_suspend_voltage
0348  */
0349 static int mcp16502_set_suspend_voltage(struct regulator_dev *rdev, int uV)
0350 {
0351     int sel = regulator_map_voltage_linear_range(rdev, uV, uV);
0352     int reg = mcp16502_suspend_get_target_reg(rdev);
0353 
0354     if (sel < 0)
0355         return sel;
0356 
0357     if (reg < 0)
0358         return reg;
0359 
0360     return regmap_update_bits(rdev->regmap, reg, MCP16502_VSEL, sel);
0361 }
0362 
0363 /*
0364  * mcp16502_set_suspend_mode() - regulator_ops set_suspend_mode
0365  */
0366 static int mcp16502_set_suspend_mode(struct regulator_dev *rdev,
0367                      unsigned int mode)
0368 {
0369     switch (pm_suspend_target_state) {
0370     case PM_SUSPEND_STANDBY:
0371         return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_LPM);
0372     case PM_SUSPEND_ON:
0373     case PM_SUSPEND_MEM:
0374         return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_HIB);
0375     default:
0376         dev_err(&rdev->dev, "invalid suspend target: %d\n",
0377             pm_suspend_target_state);
0378     }
0379 
0380     return -EINVAL;
0381 }
0382 
0383 /*
0384  * mcp16502_set_suspend_enable() - regulator_ops set_suspend_enable
0385  */
0386 static int mcp16502_set_suspend_enable(struct regulator_dev *rdev)
0387 {
0388     int reg = mcp16502_suspend_get_target_reg(rdev);
0389 
0390     if (reg < 0)
0391         return reg;
0392 
0393     return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, MCP16502_EN);
0394 }
0395 
0396 /*
0397  * mcp16502_set_suspend_disable() - regulator_ops set_suspend_disable
0398  */
0399 static int mcp16502_set_suspend_disable(struct regulator_dev *rdev)
0400 {
0401     int reg = mcp16502_suspend_get_target_reg(rdev);
0402 
0403     if (reg < 0)
0404         return reg;
0405 
0406     return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, 0);
0407 }
0408 #endif /* CONFIG_SUSPEND */
0409 
0410 static const struct regulator_ops mcp16502_buck_ops = {
0411     .list_voltage           = regulator_list_voltage_linear_range,
0412     .map_voltage            = regulator_map_voltage_linear_range,
0413     .get_voltage_sel        = regulator_get_voltage_sel_regmap,
0414     .set_voltage_sel        = regulator_set_voltage_sel_regmap,
0415     .enable             = regulator_enable_regmap,
0416     .disable            = regulator_disable_regmap,
0417     .is_enabled         = regulator_is_enabled_regmap,
0418     .get_status         = mcp16502_get_status,
0419     .set_voltage_time_sel       = mcp16502_set_voltage_time_sel,
0420     .set_ramp_delay         = regulator_set_ramp_delay_regmap,
0421 
0422     .set_mode           = mcp16502_set_mode,
0423     .get_mode           = mcp16502_get_mode,
0424 
0425 #ifdef CONFIG_SUSPEND
0426     .set_suspend_voltage        = mcp16502_set_suspend_voltage,
0427     .set_suspend_mode       = mcp16502_set_suspend_mode,
0428     .set_suspend_enable     = mcp16502_set_suspend_enable,
0429     .set_suspend_disable        = mcp16502_set_suspend_disable,
0430 #endif /* CONFIG_SUSPEND */
0431 };
0432 
0433 /*
0434  * LDOs cannot change operating modes.
0435  */
0436 static const struct regulator_ops mcp16502_ldo_ops = {
0437     .list_voltage           = regulator_list_voltage_linear_range,
0438     .map_voltage            = regulator_map_voltage_linear_range,
0439     .get_voltage_sel        = regulator_get_voltage_sel_regmap,
0440     .set_voltage_sel        = regulator_set_voltage_sel_regmap,
0441     .enable             = regulator_enable_regmap,
0442     .disable            = regulator_disable_regmap,
0443     .is_enabled         = regulator_is_enabled_regmap,
0444     .get_status         = mcp16502_get_status,
0445     .set_voltage_time_sel       = mcp16502_set_voltage_time_sel,
0446     .set_ramp_delay         = regulator_set_ramp_delay_regmap,
0447 
0448 #ifdef CONFIG_SUSPEND
0449     .set_suspend_voltage        = mcp16502_set_suspend_voltage,
0450     .set_suspend_enable     = mcp16502_set_suspend_enable,
0451     .set_suspend_disable        = mcp16502_set_suspend_disable,
0452 #endif /* CONFIG_SUSPEND */
0453 };
0454 
0455 static const struct of_device_id mcp16502_ids[] = {
0456     { .compatible = "microchip,mcp16502", },
0457     {}
0458 };
0459 MODULE_DEVICE_TABLE(of, mcp16502_ids);
0460 
0461 static const struct linear_range b1l12_ranges[] = {
0462     REGULATOR_LINEAR_RANGE(1200000, VDD_LOW_SEL, VDD_HIGH_SEL, 50000),
0463 };
0464 
0465 static const struct linear_range b234_ranges[] = {
0466     REGULATOR_LINEAR_RANGE(600000, VDD_LOW_SEL, VDD_HIGH_SEL, 25000),
0467 };
0468 
0469 static const struct regulator_desc mcp16502_desc[] = {
0470     /* MCP16502_REGULATOR(_name, _id, ranges, regulator_ops, ramp_table) */
0471     MCP16502_REGULATOR("VDD_IO", BUCK1, b1l12_ranges, mcp16502_buck_ops,
0472                mcp16502_ramp_b1l12),
0473     MCP16502_REGULATOR("VDD_DDR", BUCK2, b234_ranges, mcp16502_buck_ops,
0474                mcp16502_ramp_b234),
0475     MCP16502_REGULATOR("VDD_CORE", BUCK3, b234_ranges, mcp16502_buck_ops,
0476                mcp16502_ramp_b234),
0477     MCP16502_REGULATOR("VDD_OTHER", BUCK4, b234_ranges, mcp16502_buck_ops,
0478                mcp16502_ramp_b234),
0479     MCP16502_REGULATOR("LDO1", LDO1, b1l12_ranges, mcp16502_ldo_ops,
0480                mcp16502_ramp_b1l12),
0481     MCP16502_REGULATOR("LDO2", LDO2, b1l12_ranges, mcp16502_ldo_ops,
0482                mcp16502_ramp_b1l12)
0483 };
0484 
0485 static const struct regmap_range mcp16502_ranges[] = {
0486     regmap_reg_range(MCP16502_MIN_REG, MCP16502_MAX_REG)
0487 };
0488 
0489 static const struct regmap_access_table mcp16502_yes_reg_table = {
0490     .yes_ranges = mcp16502_ranges,
0491     .n_yes_ranges = ARRAY_SIZE(mcp16502_ranges),
0492 };
0493 
0494 static const struct regmap_config mcp16502_regmap_config = {
0495     .reg_bits   = 8,
0496     .val_bits   = 8,
0497     .max_register   = MCP16502_MAX_REG,
0498     .cache_type = REGCACHE_NONE,
0499     .rd_table   = &mcp16502_yes_reg_table,
0500     .wr_table   = &mcp16502_yes_reg_table,
0501 };
0502 
0503 static int mcp16502_probe(struct i2c_client *client)
0504 {
0505     struct regulator_config config = { };
0506     struct regulator_dev *rdev;
0507     struct device *dev;
0508     struct mcp16502 *mcp;
0509     struct regmap *rmap;
0510     int i, ret;
0511 
0512     dev = &client->dev;
0513     config.dev = dev;
0514 
0515     mcp = devm_kzalloc(dev, sizeof(*mcp), GFP_KERNEL);
0516     if (!mcp)
0517         return -ENOMEM;
0518 
0519     rmap = devm_regmap_init_i2c(client, &mcp16502_regmap_config);
0520     if (IS_ERR(rmap)) {
0521         ret = PTR_ERR(rmap);
0522         dev_err(dev, "regmap init failed: %d\n", ret);
0523         return ret;
0524     }
0525 
0526     i2c_set_clientdata(client, mcp);
0527     config.regmap = rmap;
0528     config.driver_data = mcp;
0529 
0530     mcp->lpm = devm_gpiod_get_optional(dev, "lpm", GPIOD_OUT_LOW);
0531     if (IS_ERR(mcp->lpm)) {
0532         dev_err(dev, "failed to get lpm pin: %ld\n", PTR_ERR(mcp->lpm));
0533         return PTR_ERR(mcp->lpm);
0534     }
0535 
0536     for (i = 0; i < NUM_REGULATORS; i++) {
0537         rdev = devm_regulator_register(dev, &mcp16502_desc[i], &config);
0538         if (IS_ERR(rdev)) {
0539             dev_err(dev,
0540                 "failed to register %s regulator %ld\n",
0541                 mcp16502_desc[i].name, PTR_ERR(rdev));
0542             return PTR_ERR(rdev);
0543         }
0544     }
0545 
0546     mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE);
0547 
0548     return 0;
0549 }
0550 
0551 #ifdef CONFIG_PM_SLEEP
0552 static int mcp16502_suspend_noirq(struct device *dev)
0553 {
0554     struct i2c_client *client = to_i2c_client(dev);
0555     struct mcp16502 *mcp = i2c_get_clientdata(client);
0556 
0557     mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_LPM);
0558 
0559     return 0;
0560 }
0561 
0562 static int mcp16502_resume_noirq(struct device *dev)
0563 {
0564     struct i2c_client *client = to_i2c_client(dev);
0565     struct mcp16502 *mcp = i2c_get_clientdata(client);
0566 
0567     mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE);
0568 
0569     return 0;
0570 }
0571 #endif
0572 
0573 #ifdef CONFIG_PM
0574 static const struct dev_pm_ops mcp16502_pm_ops = {
0575     SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mcp16502_suspend_noirq,
0576                       mcp16502_resume_noirq)
0577 };
0578 #endif
0579 static const struct i2c_device_id mcp16502_i2c_id[] = {
0580     { "mcp16502", 0 },
0581     { }
0582 };
0583 MODULE_DEVICE_TABLE(i2c, mcp16502_i2c_id);
0584 
0585 static struct i2c_driver mcp16502_drv = {
0586     .probe_new  = mcp16502_probe,
0587     .driver     = {
0588         .name   = "mcp16502-regulator",
0589         .of_match_table = of_match_ptr(mcp16502_ids),
0590 #ifdef CONFIG_PM
0591         .pm = &mcp16502_pm_ops,
0592 #endif
0593     },
0594     .id_table   = mcp16502_i2c_id,
0595 };
0596 
0597 module_i2c_driver(mcp16502_drv);
0598 
0599 MODULE_LICENSE("GPL v2");
0600 MODULE_DESCRIPTION("MCP16502 PMIC driver");
0601 MODULE_AUTHOR("Andrei Stefanescu andrei.stefanescu@microchip.com");
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