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0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright 2020 NXP.
0004  * NXP PCA9450 pmic driver
0005  */
0006 
0007 #include <linux/err.h>
0008 #include <linux/gpio/consumer.h>
0009 #include <linux/i2c.h>
0010 #include <linux/interrupt.h>
0011 #include <linux/kernel.h>
0012 #include <linux/module.h>
0013 #include <linux/of.h>
0014 #include <linux/of_device.h>
0015 #include <linux/platform_device.h>
0016 #include <linux/regulator/driver.h>
0017 #include <linux/regulator/machine.h>
0018 #include <linux/regulator/of_regulator.h>
0019 #include <linux/regulator/pca9450.h>
0020 
0021 struct pc9450_dvs_config {
0022     unsigned int run_reg; /* dvs0 */
0023     unsigned int run_mask;
0024     unsigned int standby_reg; /* dvs1 */
0025     unsigned int standby_mask;
0026 };
0027 
0028 struct pca9450_regulator_desc {
0029     struct regulator_desc desc;
0030     const struct pc9450_dvs_config dvs;
0031 };
0032 
0033 struct pca9450 {
0034     struct device *dev;
0035     struct regmap *regmap;
0036     struct gpio_desc *sd_vsel_gpio;
0037     enum pca9450_chip_type type;
0038     unsigned int rcnt;
0039     int irq;
0040 };
0041 
0042 static const struct regmap_range pca9450_status_range = {
0043     .range_min = PCA9450_REG_INT1,
0044     .range_max = PCA9450_REG_PWRON_STAT,
0045 };
0046 
0047 static const struct regmap_access_table pca9450_volatile_regs = {
0048     .yes_ranges = &pca9450_status_range,
0049     .n_yes_ranges = 1,
0050 };
0051 
0052 static const struct regmap_config pca9450_regmap_config = {
0053     .reg_bits = 8,
0054     .val_bits = 8,
0055     .volatile_table = &pca9450_volatile_regs,
0056     .max_register = PCA9450_MAX_REGISTER - 1,
0057     .cache_type = REGCACHE_RBTREE,
0058 };
0059 
0060 /*
0061  * BUCK1/2/3
0062  * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
0063  * 00: 25mV/1usec
0064  * 01: 25mV/2usec
0065  * 10: 25mV/4usec
0066  * 11: 25mV/8usec
0067  */
0068 static const unsigned int pca9450_dvs_buck_ramp_table[] = {
0069     25000, 12500, 6250, 3125
0070 };
0071 
0072 static const struct regulator_ops pca9450_dvs_buck_regulator_ops = {
0073     .enable = regulator_enable_regmap,
0074     .disable = regulator_disable_regmap,
0075     .is_enabled = regulator_is_enabled_regmap,
0076     .list_voltage = regulator_list_voltage_linear_range,
0077     .set_voltage_sel = regulator_set_voltage_sel_regmap,
0078     .get_voltage_sel = regulator_get_voltage_sel_regmap,
0079     .set_voltage_time_sel = regulator_set_voltage_time_sel,
0080     .set_ramp_delay = regulator_set_ramp_delay_regmap,
0081 };
0082 
0083 static const struct regulator_ops pca9450_buck_regulator_ops = {
0084     .enable = regulator_enable_regmap,
0085     .disable = regulator_disable_regmap,
0086     .is_enabled = regulator_is_enabled_regmap,
0087     .list_voltage = regulator_list_voltage_linear_range,
0088     .set_voltage_sel = regulator_set_voltage_sel_regmap,
0089     .get_voltage_sel = regulator_get_voltage_sel_regmap,
0090     .set_voltage_time_sel = regulator_set_voltage_time_sel,
0091 };
0092 
0093 static const struct regulator_ops pca9450_ldo_regulator_ops = {
0094     .enable = regulator_enable_regmap,
0095     .disable = regulator_disable_regmap,
0096     .is_enabled = regulator_is_enabled_regmap,
0097     .list_voltage = regulator_list_voltage_linear_range,
0098     .set_voltage_sel = regulator_set_voltage_sel_regmap,
0099     .get_voltage_sel = regulator_get_voltage_sel_regmap,
0100 };
0101 
0102 /*
0103  * BUCK1/2/3
0104  * 0.60 to 2.1875V (12.5mV step)
0105  */
0106 static const struct linear_range pca9450_dvs_buck_volts[] = {
0107     REGULATOR_LINEAR_RANGE(600000,  0x00, 0x7F, 12500),
0108 };
0109 
0110 /*
0111  * BUCK4/5/6
0112  * 0.6V to 3.4V (25mV step)
0113  */
0114 static const struct linear_range pca9450_buck_volts[] = {
0115     REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
0116     REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
0117 };
0118 
0119 /*
0120  * LDO1
0121  * 1.6 to 3.3V ()
0122  */
0123 static const struct linear_range pca9450_ldo1_volts[] = {
0124     REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
0125     REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
0126 };
0127 
0128 /*
0129  * LDO2
0130  * 0.8 to 1.15V (50mV step)
0131  */
0132 static const struct linear_range pca9450_ldo2_volts[] = {
0133     REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
0134 };
0135 
0136 /*
0137  * LDO3/4
0138  * 0.8 to 3.3V (100mV step)
0139  */
0140 static const struct linear_range pca9450_ldo34_volts[] = {
0141     REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
0142     REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
0143 };
0144 
0145 /*
0146  * LDO5
0147  * 1.8 to 3.3V (100mV step)
0148  */
0149 static const struct linear_range pca9450_ldo5_volts[] = {
0150     REGULATOR_LINEAR_RANGE(1800000,  0x00, 0x0F, 100000),
0151 };
0152 
0153 static int buck_set_dvs(const struct regulator_desc *desc,
0154             struct device_node *np, struct regmap *regmap,
0155             char *prop, unsigned int reg, unsigned int mask)
0156 {
0157     int ret, i;
0158     uint32_t uv;
0159 
0160     ret = of_property_read_u32(np, prop, &uv);
0161     if (ret == -EINVAL)
0162         return 0;
0163     else if (ret)
0164         return ret;
0165 
0166     for (i = 0; i < desc->n_voltages; i++) {
0167         ret = regulator_desc_list_voltage_linear_range(desc, i);
0168         if (ret < 0)
0169             continue;
0170         if (ret == uv) {
0171             i <<= ffs(desc->vsel_mask) - 1;
0172             ret = regmap_update_bits(regmap, reg, mask, i);
0173             break;
0174         }
0175     }
0176 
0177     if (ret == 0) {
0178         struct pca9450_regulator_desc *regulator = container_of(desc,
0179                     struct pca9450_regulator_desc, desc);
0180 
0181         /* Enable DVS control through PMIC_STBY_REQ for this BUCK */
0182         ret = regmap_update_bits(regmap, regulator->desc.enable_reg,
0183                      BUCK1_DVS_CTRL, BUCK1_DVS_CTRL);
0184     }
0185     return ret;
0186 }
0187 
0188 static int pca9450_set_dvs_levels(struct device_node *np,
0189                 const struct regulator_desc *desc,
0190                 struct regulator_config *cfg)
0191 {
0192     struct pca9450_regulator_desc *data = container_of(desc,
0193                     struct pca9450_regulator_desc, desc);
0194     const struct pc9450_dvs_config *dvs = &data->dvs;
0195     unsigned int reg, mask;
0196     char *prop;
0197     int i, ret = 0;
0198 
0199     for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
0200         switch (i) {
0201         case PCA9450_DVS_LEVEL_RUN:
0202             prop = "nxp,dvs-run-voltage";
0203             reg = dvs->run_reg;
0204             mask = dvs->run_mask;
0205             break;
0206         case PCA9450_DVS_LEVEL_STANDBY:
0207             prop = "nxp,dvs-standby-voltage";
0208             reg = dvs->standby_reg;
0209             mask = dvs->standby_mask;
0210             break;
0211         default:
0212             return -EINVAL;
0213         }
0214 
0215         ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
0216         if (ret)
0217             break;
0218     }
0219 
0220     return ret;
0221 }
0222 
0223 static const struct pca9450_regulator_desc pca9450a_regulators[] = {
0224     {
0225         .desc = {
0226             .name = "buck1",
0227             .of_match = of_match_ptr("BUCK1"),
0228             .regulators_node = of_match_ptr("regulators"),
0229             .id = PCA9450_BUCK1,
0230             .ops = &pca9450_dvs_buck_regulator_ops,
0231             .type = REGULATOR_VOLTAGE,
0232             .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
0233             .linear_ranges = pca9450_dvs_buck_volts,
0234             .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
0235             .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
0236             .vsel_mask = BUCK1OUT_DVS0_MASK,
0237             .enable_reg = PCA9450_REG_BUCK1CTRL,
0238             .enable_mask = BUCK1_ENMODE_MASK,
0239             .ramp_reg = PCA9450_REG_BUCK1CTRL,
0240             .ramp_mask = BUCK1_RAMP_MASK,
0241             .ramp_delay_table = pca9450_dvs_buck_ramp_table,
0242             .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
0243             .owner = THIS_MODULE,
0244             .of_parse_cb = pca9450_set_dvs_levels,
0245         },
0246         .dvs = {
0247             .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
0248             .run_mask = BUCK1OUT_DVS0_MASK,
0249             .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
0250             .standby_mask = BUCK1OUT_DVS1_MASK,
0251         },
0252     },
0253     {
0254         .desc = {
0255             .name = "buck2",
0256             .of_match = of_match_ptr("BUCK2"),
0257             .regulators_node = of_match_ptr("regulators"),
0258             .id = PCA9450_BUCK2,
0259             .ops = &pca9450_dvs_buck_regulator_ops,
0260             .type = REGULATOR_VOLTAGE,
0261             .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
0262             .linear_ranges = pca9450_dvs_buck_volts,
0263             .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
0264             .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
0265             .vsel_mask = BUCK2OUT_DVS0_MASK,
0266             .enable_reg = PCA9450_REG_BUCK2CTRL,
0267             .enable_mask = BUCK1_ENMODE_MASK,
0268             .ramp_reg = PCA9450_REG_BUCK2CTRL,
0269             .ramp_mask = BUCK2_RAMP_MASK,
0270             .ramp_delay_table = pca9450_dvs_buck_ramp_table,
0271             .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
0272             .owner = THIS_MODULE,
0273             .of_parse_cb = pca9450_set_dvs_levels,
0274         },
0275         .dvs = {
0276             .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
0277             .run_mask = BUCK2OUT_DVS0_MASK,
0278             .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
0279             .standby_mask = BUCK2OUT_DVS1_MASK,
0280         },
0281     },
0282     {
0283         .desc = {
0284             .name = "buck3",
0285             .of_match = of_match_ptr("BUCK3"),
0286             .regulators_node = of_match_ptr("regulators"),
0287             .id = PCA9450_BUCK3,
0288             .ops = &pca9450_dvs_buck_regulator_ops,
0289             .type = REGULATOR_VOLTAGE,
0290             .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
0291             .linear_ranges = pca9450_dvs_buck_volts,
0292             .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
0293             .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
0294             .vsel_mask = BUCK3OUT_DVS0_MASK,
0295             .enable_reg = PCA9450_REG_BUCK3CTRL,
0296             .enable_mask = BUCK3_ENMODE_MASK,
0297             .ramp_reg = PCA9450_REG_BUCK3CTRL,
0298             .ramp_mask = BUCK3_RAMP_MASK,
0299             .ramp_delay_table = pca9450_dvs_buck_ramp_table,
0300             .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
0301             .owner = THIS_MODULE,
0302             .of_parse_cb = pca9450_set_dvs_levels,
0303         },
0304         .dvs = {
0305             .run_reg = PCA9450_REG_BUCK3OUT_DVS0,
0306             .run_mask = BUCK3OUT_DVS0_MASK,
0307             .standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
0308             .standby_mask = BUCK3OUT_DVS1_MASK,
0309         },
0310     },
0311     {
0312         .desc = {
0313             .name = "buck4",
0314             .of_match = of_match_ptr("BUCK4"),
0315             .regulators_node = of_match_ptr("regulators"),
0316             .id = PCA9450_BUCK4,
0317             .ops = &pca9450_buck_regulator_ops,
0318             .type = REGULATOR_VOLTAGE,
0319             .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
0320             .linear_ranges = pca9450_buck_volts,
0321             .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
0322             .vsel_reg = PCA9450_REG_BUCK4OUT,
0323             .vsel_mask = BUCK4OUT_MASK,
0324             .enable_reg = PCA9450_REG_BUCK4CTRL,
0325             .enable_mask = BUCK4_ENMODE_MASK,
0326             .owner = THIS_MODULE,
0327         },
0328     },
0329     {
0330         .desc = {
0331             .name = "buck5",
0332             .of_match = of_match_ptr("BUCK5"),
0333             .regulators_node = of_match_ptr("regulators"),
0334             .id = PCA9450_BUCK5,
0335             .ops = &pca9450_buck_regulator_ops,
0336             .type = REGULATOR_VOLTAGE,
0337             .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
0338             .linear_ranges = pca9450_buck_volts,
0339             .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
0340             .vsel_reg = PCA9450_REG_BUCK5OUT,
0341             .vsel_mask = BUCK5OUT_MASK,
0342             .enable_reg = PCA9450_REG_BUCK5CTRL,
0343             .enable_mask = BUCK5_ENMODE_MASK,
0344             .owner = THIS_MODULE,
0345         },
0346     },
0347     {
0348         .desc = {
0349             .name = "buck6",
0350             .of_match = of_match_ptr("BUCK6"),
0351             .regulators_node = of_match_ptr("regulators"),
0352             .id = PCA9450_BUCK6,
0353             .ops = &pca9450_buck_regulator_ops,
0354             .type = REGULATOR_VOLTAGE,
0355             .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
0356             .linear_ranges = pca9450_buck_volts,
0357             .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
0358             .vsel_reg = PCA9450_REG_BUCK6OUT,
0359             .vsel_mask = BUCK6OUT_MASK,
0360             .enable_reg = PCA9450_REG_BUCK6CTRL,
0361             .enable_mask = BUCK6_ENMODE_MASK,
0362             .owner = THIS_MODULE,
0363         },
0364     },
0365     {
0366         .desc = {
0367             .name = "ldo1",
0368             .of_match = of_match_ptr("LDO1"),
0369             .regulators_node = of_match_ptr("regulators"),
0370             .id = PCA9450_LDO1,
0371             .ops = &pca9450_ldo_regulator_ops,
0372             .type = REGULATOR_VOLTAGE,
0373             .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
0374             .linear_ranges = pca9450_ldo1_volts,
0375             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
0376             .vsel_reg = PCA9450_REG_LDO1CTRL,
0377             .vsel_mask = LDO1OUT_MASK,
0378             .enable_reg = PCA9450_REG_LDO1CTRL,
0379             .enable_mask = LDO1_EN_MASK,
0380             .owner = THIS_MODULE,
0381         },
0382     },
0383     {
0384         .desc = {
0385             .name = "ldo2",
0386             .of_match = of_match_ptr("LDO2"),
0387             .regulators_node = of_match_ptr("regulators"),
0388             .id = PCA9450_LDO2,
0389             .ops = &pca9450_ldo_regulator_ops,
0390             .type = REGULATOR_VOLTAGE,
0391             .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
0392             .linear_ranges = pca9450_ldo2_volts,
0393             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
0394             .vsel_reg = PCA9450_REG_LDO2CTRL,
0395             .vsel_mask = LDO2OUT_MASK,
0396             .enable_reg = PCA9450_REG_LDO2CTRL,
0397             .enable_mask = LDO2_EN_MASK,
0398             .owner = THIS_MODULE,
0399         },
0400     },
0401     {
0402         .desc = {
0403             .name = "ldo3",
0404             .of_match = of_match_ptr("LDO3"),
0405             .regulators_node = of_match_ptr("regulators"),
0406             .id = PCA9450_LDO3,
0407             .ops = &pca9450_ldo_regulator_ops,
0408             .type = REGULATOR_VOLTAGE,
0409             .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
0410             .linear_ranges = pca9450_ldo34_volts,
0411             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
0412             .vsel_reg = PCA9450_REG_LDO3CTRL,
0413             .vsel_mask = LDO3OUT_MASK,
0414             .enable_reg = PCA9450_REG_LDO3CTRL,
0415             .enable_mask = LDO3_EN_MASK,
0416             .owner = THIS_MODULE,
0417         },
0418     },
0419     {
0420         .desc = {
0421             .name = "ldo4",
0422             .of_match = of_match_ptr("LDO4"),
0423             .regulators_node = of_match_ptr("regulators"),
0424             .id = PCA9450_LDO4,
0425             .ops = &pca9450_ldo_regulator_ops,
0426             .type = REGULATOR_VOLTAGE,
0427             .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
0428             .linear_ranges = pca9450_ldo34_volts,
0429             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
0430             .vsel_reg = PCA9450_REG_LDO4CTRL,
0431             .vsel_mask = LDO4OUT_MASK,
0432             .enable_reg = PCA9450_REG_LDO4CTRL,
0433             .enable_mask = LDO4_EN_MASK,
0434             .owner = THIS_MODULE,
0435         },
0436     },
0437     {
0438         .desc = {
0439             .name = "ldo5",
0440             .of_match = of_match_ptr("LDO5"),
0441             .regulators_node = of_match_ptr("regulators"),
0442             .id = PCA9450_LDO5,
0443             .ops = &pca9450_ldo_regulator_ops,
0444             .type = REGULATOR_VOLTAGE,
0445             .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
0446             .linear_ranges = pca9450_ldo5_volts,
0447             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
0448             .vsel_reg = PCA9450_REG_LDO5CTRL_H,
0449             .vsel_mask = LDO5HOUT_MASK,
0450             .enable_reg = PCA9450_REG_LDO5CTRL_H,
0451             .enable_mask = LDO5H_EN_MASK,
0452             .owner = THIS_MODULE,
0453         },
0454     },
0455 };
0456 
0457 /*
0458  * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
0459  * on PCA9450C as no Buck3.
0460  */
0461 static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
0462     {
0463         .desc = {
0464             .name = "buck1",
0465             .of_match = of_match_ptr("BUCK1"),
0466             .regulators_node = of_match_ptr("regulators"),
0467             .id = PCA9450_BUCK1,
0468             .ops = &pca9450_dvs_buck_regulator_ops,
0469             .type = REGULATOR_VOLTAGE,
0470             .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
0471             .linear_ranges = pca9450_dvs_buck_volts,
0472             .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
0473             .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
0474             .vsel_mask = BUCK1OUT_DVS0_MASK,
0475             .enable_reg = PCA9450_REG_BUCK1CTRL,
0476             .enable_mask = BUCK1_ENMODE_MASK,
0477             .ramp_reg = PCA9450_REG_BUCK1CTRL,
0478             .ramp_mask = BUCK1_RAMP_MASK,
0479             .ramp_delay_table = pca9450_dvs_buck_ramp_table,
0480             .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
0481             .owner = THIS_MODULE,
0482             .of_parse_cb = pca9450_set_dvs_levels,
0483         },
0484         .dvs = {
0485             .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
0486             .run_mask = BUCK1OUT_DVS0_MASK,
0487             .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
0488             .standby_mask = BUCK1OUT_DVS1_MASK,
0489         },
0490     },
0491     {
0492         .desc = {
0493             .name = "buck2",
0494             .of_match = of_match_ptr("BUCK2"),
0495             .regulators_node = of_match_ptr("regulators"),
0496             .id = PCA9450_BUCK2,
0497             .ops = &pca9450_dvs_buck_regulator_ops,
0498             .type = REGULATOR_VOLTAGE,
0499             .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
0500             .linear_ranges = pca9450_dvs_buck_volts,
0501             .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
0502             .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
0503             .vsel_mask = BUCK2OUT_DVS0_MASK,
0504             .enable_reg = PCA9450_REG_BUCK2CTRL,
0505             .enable_mask = BUCK1_ENMODE_MASK,
0506             .ramp_reg = PCA9450_REG_BUCK2CTRL,
0507             .ramp_mask = BUCK2_RAMP_MASK,
0508             .ramp_delay_table = pca9450_dvs_buck_ramp_table,
0509             .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
0510             .owner = THIS_MODULE,
0511             .of_parse_cb = pca9450_set_dvs_levels,
0512         },
0513         .dvs = {
0514             .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
0515             .run_mask = BUCK2OUT_DVS0_MASK,
0516             .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
0517             .standby_mask = BUCK2OUT_DVS1_MASK,
0518         },
0519     },
0520     {
0521         .desc = {
0522             .name = "buck4",
0523             .of_match = of_match_ptr("BUCK4"),
0524             .regulators_node = of_match_ptr("regulators"),
0525             .id = PCA9450_BUCK4,
0526             .ops = &pca9450_buck_regulator_ops,
0527             .type = REGULATOR_VOLTAGE,
0528             .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
0529             .linear_ranges = pca9450_buck_volts,
0530             .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
0531             .vsel_reg = PCA9450_REG_BUCK4OUT,
0532             .vsel_mask = BUCK4OUT_MASK,
0533             .enable_reg = PCA9450_REG_BUCK4CTRL,
0534             .enable_mask = BUCK4_ENMODE_MASK,
0535             .owner = THIS_MODULE,
0536         },
0537     },
0538     {
0539         .desc = {
0540             .name = "buck5",
0541             .of_match = of_match_ptr("BUCK5"),
0542             .regulators_node = of_match_ptr("regulators"),
0543             .id = PCA9450_BUCK5,
0544             .ops = &pca9450_buck_regulator_ops,
0545             .type = REGULATOR_VOLTAGE,
0546             .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
0547             .linear_ranges = pca9450_buck_volts,
0548             .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
0549             .vsel_reg = PCA9450_REG_BUCK5OUT,
0550             .vsel_mask = BUCK5OUT_MASK,
0551             .enable_reg = PCA9450_REG_BUCK5CTRL,
0552             .enable_mask = BUCK5_ENMODE_MASK,
0553             .owner = THIS_MODULE,
0554         },
0555     },
0556     {
0557         .desc = {
0558             .name = "buck6",
0559             .of_match = of_match_ptr("BUCK6"),
0560             .regulators_node = of_match_ptr("regulators"),
0561             .id = PCA9450_BUCK6,
0562             .ops = &pca9450_buck_regulator_ops,
0563             .type = REGULATOR_VOLTAGE,
0564             .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
0565             .linear_ranges = pca9450_buck_volts,
0566             .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
0567             .vsel_reg = PCA9450_REG_BUCK6OUT,
0568             .vsel_mask = BUCK6OUT_MASK,
0569             .enable_reg = PCA9450_REG_BUCK6CTRL,
0570             .enable_mask = BUCK6_ENMODE_MASK,
0571             .owner = THIS_MODULE,
0572         },
0573     },
0574     {
0575         .desc = {
0576             .name = "ldo1",
0577             .of_match = of_match_ptr("LDO1"),
0578             .regulators_node = of_match_ptr("regulators"),
0579             .id = PCA9450_LDO1,
0580             .ops = &pca9450_ldo_regulator_ops,
0581             .type = REGULATOR_VOLTAGE,
0582             .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
0583             .linear_ranges = pca9450_ldo1_volts,
0584             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
0585             .vsel_reg = PCA9450_REG_LDO1CTRL,
0586             .vsel_mask = LDO1OUT_MASK,
0587             .enable_reg = PCA9450_REG_LDO1CTRL,
0588             .enable_mask = LDO1_EN_MASK,
0589             .owner = THIS_MODULE,
0590         },
0591     },
0592     {
0593         .desc = {
0594             .name = "ldo2",
0595             .of_match = of_match_ptr("LDO2"),
0596             .regulators_node = of_match_ptr("regulators"),
0597             .id = PCA9450_LDO2,
0598             .ops = &pca9450_ldo_regulator_ops,
0599             .type = REGULATOR_VOLTAGE,
0600             .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
0601             .linear_ranges = pca9450_ldo2_volts,
0602             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
0603             .vsel_reg = PCA9450_REG_LDO2CTRL,
0604             .vsel_mask = LDO2OUT_MASK,
0605             .enable_reg = PCA9450_REG_LDO2CTRL,
0606             .enable_mask = LDO2_EN_MASK,
0607             .owner = THIS_MODULE,
0608         },
0609     },
0610     {
0611         .desc = {
0612             .name = "ldo3",
0613             .of_match = of_match_ptr("LDO3"),
0614             .regulators_node = of_match_ptr("regulators"),
0615             .id = PCA9450_LDO3,
0616             .ops = &pca9450_ldo_regulator_ops,
0617             .type = REGULATOR_VOLTAGE,
0618             .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
0619             .linear_ranges = pca9450_ldo34_volts,
0620             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
0621             .vsel_reg = PCA9450_REG_LDO3CTRL,
0622             .vsel_mask = LDO3OUT_MASK,
0623             .enable_reg = PCA9450_REG_LDO3CTRL,
0624             .enable_mask = LDO3_EN_MASK,
0625             .owner = THIS_MODULE,
0626         },
0627     },
0628     {
0629         .desc = {
0630             .name = "ldo4",
0631             .of_match = of_match_ptr("LDO4"),
0632             .regulators_node = of_match_ptr("regulators"),
0633             .id = PCA9450_LDO4,
0634             .ops = &pca9450_ldo_regulator_ops,
0635             .type = REGULATOR_VOLTAGE,
0636             .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
0637             .linear_ranges = pca9450_ldo34_volts,
0638             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
0639             .vsel_reg = PCA9450_REG_LDO4CTRL,
0640             .vsel_mask = LDO4OUT_MASK,
0641             .enable_reg = PCA9450_REG_LDO4CTRL,
0642             .enable_mask = LDO4_EN_MASK,
0643             .owner = THIS_MODULE,
0644         },
0645     },
0646     {
0647         .desc = {
0648             .name = "ldo5",
0649             .of_match = of_match_ptr("LDO5"),
0650             .regulators_node = of_match_ptr("regulators"),
0651             .id = PCA9450_LDO5,
0652             .ops = &pca9450_ldo_regulator_ops,
0653             .type = REGULATOR_VOLTAGE,
0654             .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
0655             .linear_ranges = pca9450_ldo5_volts,
0656             .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
0657             .vsel_reg = PCA9450_REG_LDO5CTRL_H,
0658             .vsel_mask = LDO5HOUT_MASK,
0659             .enable_reg = PCA9450_REG_LDO5CTRL_H,
0660             .enable_mask = LDO5H_EN_MASK,
0661             .owner = THIS_MODULE,
0662         },
0663     },
0664 };
0665 
0666 static irqreturn_t pca9450_irq_handler(int irq, void *data)
0667 {
0668     struct pca9450 *pca9450 = data;
0669     struct regmap *regmap = pca9450->regmap;
0670     unsigned int status;
0671     int ret;
0672 
0673     ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
0674     if (ret < 0) {
0675         dev_err(pca9450->dev,
0676             "Failed to read INT1(%d)\n", ret);
0677         return IRQ_NONE;
0678     }
0679 
0680     if (status & IRQ_PWRON)
0681         dev_warn(pca9450->dev, "PWRON interrupt.\n");
0682 
0683     if (status & IRQ_WDOGB)
0684         dev_warn(pca9450->dev, "WDOGB interrupt.\n");
0685 
0686     if (status & IRQ_VR_FLT1)
0687         dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
0688 
0689     if (status & IRQ_VR_FLT2)
0690         dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
0691 
0692     if (status & IRQ_LOWVSYS)
0693         dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
0694 
0695     if (status & IRQ_THERM_105)
0696         dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
0697 
0698     if (status & IRQ_THERM_125)
0699         dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
0700 
0701     return IRQ_HANDLED;
0702 }
0703 
0704 static int pca9450_i2c_probe(struct i2c_client *i2c,
0705                  const struct i2c_device_id *id)
0706 {
0707     enum pca9450_chip_type type = (unsigned int)(uintptr_t)
0708                       of_device_get_match_data(&i2c->dev);
0709     const struct pca9450_regulator_desc *regulator_desc;
0710     struct regulator_config config = { };
0711     struct pca9450 *pca9450;
0712     unsigned int device_id, i;
0713     unsigned int reset_ctrl;
0714     int ret;
0715 
0716     if (!i2c->irq) {
0717         dev_err(&i2c->dev, "No IRQ configured?\n");
0718         return -EINVAL;
0719     }
0720 
0721     pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
0722     if (!pca9450)
0723         return -ENOMEM;
0724 
0725     switch (type) {
0726     case PCA9450_TYPE_PCA9450A:
0727         regulator_desc = pca9450a_regulators;
0728         pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
0729         break;
0730     case PCA9450_TYPE_PCA9450BC:
0731         regulator_desc = pca9450bc_regulators;
0732         pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
0733         break;
0734     default:
0735         dev_err(&i2c->dev, "Unknown device type");
0736         return -EINVAL;
0737     }
0738 
0739     pca9450->irq = i2c->irq;
0740     pca9450->type = type;
0741     pca9450->dev = &i2c->dev;
0742 
0743     dev_set_drvdata(&i2c->dev, pca9450);
0744 
0745     pca9450->regmap = devm_regmap_init_i2c(i2c,
0746                            &pca9450_regmap_config);
0747     if (IS_ERR(pca9450->regmap)) {
0748         dev_err(&i2c->dev, "regmap initialization failed\n");
0749         return PTR_ERR(pca9450->regmap);
0750     }
0751 
0752     ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
0753     if (ret) {
0754         dev_err(&i2c->dev, "Read device id error\n");
0755         return ret;
0756     }
0757 
0758     /* Check your board and dts for match the right pmic */
0759     if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
0760         ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
0761         dev_err(&i2c->dev, "Device id(%x) mismatched\n",
0762             device_id >> 4);
0763         return -EINVAL;
0764     }
0765 
0766     for (i = 0; i < pca9450->rcnt; i++) {
0767         const struct regulator_desc *desc;
0768         struct regulator_dev *rdev;
0769         const struct pca9450_regulator_desc *r;
0770 
0771         r = &regulator_desc[i];
0772         desc = &r->desc;
0773 
0774         config.regmap = pca9450->regmap;
0775         config.dev = pca9450->dev;
0776 
0777         rdev = devm_regulator_register(pca9450->dev, desc, &config);
0778         if (IS_ERR(rdev)) {
0779             ret = PTR_ERR(rdev);
0780             dev_err(pca9450->dev,
0781                 "Failed to register regulator(%s): %d\n",
0782                 desc->name, ret);
0783             return ret;
0784         }
0785     }
0786 
0787     ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
0788                     pca9450_irq_handler,
0789                     (IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
0790                     "pca9450-irq", pca9450);
0791     if (ret != 0) {
0792         dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
0793             pca9450->irq);
0794         return ret;
0795     }
0796     /* Unmask all interrupt except PWRON/WDOG/RSVD */
0797     ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
0798                 IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
0799                 IRQ_THERM_105 | IRQ_THERM_125,
0800                 IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
0801     if (ret) {
0802         dev_err(&i2c->dev, "Unmask irq error\n");
0803         return ret;
0804     }
0805 
0806     /* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
0807     ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
0808                 BUCK123_PRESET_EN);
0809     if (ret) {
0810         dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret);
0811         return ret;
0812     }
0813 
0814     if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
0815         reset_ctrl = WDOG_B_CFG_WARM;
0816     else
0817         reset_ctrl = WDOG_B_CFG_COLD_LDO12;
0818 
0819     /* Set reset behavior on assertion of WDOG_B signal */
0820     ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
0821                  WDOG_B_CFG_MASK, reset_ctrl);
0822     if (ret) {
0823         dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
0824         return ret;
0825     }
0826 
0827     if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) {
0828         /* Enable I2C Level Translator */
0829         ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2,
0830                      I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN);
0831         if (ret) {
0832             dev_err(&i2c->dev,
0833                 "Failed to enable I2C level translator\n");
0834             return ret;
0835         }
0836     }
0837 
0838     /*
0839      * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
0840      * This is only valid if the SD_VSEL input of the PMIC is high. Let's
0841      * check if the pin is available as GPIO and set it to high.
0842      */
0843     pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
0844 
0845     if (IS_ERR(pca9450->sd_vsel_gpio)) {
0846         dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
0847         return PTR_ERR(pca9450->sd_vsel_gpio);
0848     }
0849 
0850     dev_info(&i2c->dev, "%s probed.\n",
0851         type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
0852 
0853     return 0;
0854 }
0855 
0856 static const struct of_device_id pca9450_of_match[] = {
0857     {
0858         .compatible = "nxp,pca9450a",
0859         .data = (void *)PCA9450_TYPE_PCA9450A,
0860     },
0861     {
0862         .compatible = "nxp,pca9450b",
0863         .data = (void *)PCA9450_TYPE_PCA9450BC,
0864     },
0865     {
0866         .compatible = "nxp,pca9450c",
0867         .data = (void *)PCA9450_TYPE_PCA9450BC,
0868     },
0869     { }
0870 };
0871 MODULE_DEVICE_TABLE(of, pca9450_of_match);
0872 
0873 static struct i2c_driver pca9450_i2c_driver = {
0874     .driver = {
0875         .name = "nxp-pca9450",
0876         .of_match_table = pca9450_of_match,
0877     },
0878     .probe = pca9450_i2c_probe,
0879 };
0880 
0881 module_i2c_driver(pca9450_i2c_driver);
0882 
0883 MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
0884 MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
0885 MODULE_LICENSE("GPL");
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