Back to home page

OSCL-LXR
 
 

     

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 //
0003 // DA9121 Single-channel dual-phase 10A buck converter
0004 //
0005 // Copyright (C) 2020 Axis Communications AB
0006 //
0007 // DA9130 Single-channel dual-phase 10A buck converter (Automotive)
0008 // DA9217 Single-channel dual-phase  6A buck converter
0009 // DA9122 Dual-channel single-phase  5A buck converter
0010 // DA9131 Dual-channel single-phase  5A buck converter (Automotive)
0011 // DA9220 Dual-channel single-phase  3A buck converter
0012 // DA9132 Dual-channel single-phase  3A buck converter (Automotive)
0013 //
0014 // Copyright (C) 2020 Dialog Semiconductor
0015 
0016 #include <linux/of_device.h>
0017 #include <linux/of_gpio.h>
0018 #include <linux/gpio/consumer.h>
0019 #include <linux/regulator/of_regulator.h>
0020 #include <linux/regulator/machine.h>
0021 #include <linux/regulator/driver.h>
0022 #include <linux/module.h>
0023 #include <linux/regmap.h>
0024 #include <linux/err.h>
0025 #include <linux/i2c.h>
0026 #include <linux/regulator/da9121.h>
0027 #include <linux/interrupt.h>
0028 #include <linux/workqueue.h>
0029 
0030 #include "da9121-regulator.h"
0031 
0032 /* Chip data */
0033 struct da9121 {
0034     struct device *dev;
0035     struct delayed_work work;
0036     struct da9121_pdata *pdata;
0037     struct regmap *regmap;
0038     struct regulator_dev *rdev[DA9121_IDX_MAX];
0039     unsigned int persistent[2];
0040     unsigned int passive_delay;
0041     int chip_irq;
0042     int variant_id;
0043     int subvariant_id;
0044 };
0045 
0046 /* Define ranges for different variants, enabling translation to/from
0047  * registers. Maximums give scope to allow for transients.
0048  */
0049 struct da9121_range {
0050     int val_min;
0051     int val_max;
0052     int val_stp;
0053     int reg_min;
0054     int reg_max;
0055 };
0056 
0057 static struct da9121_range da9121_10A_2phase_current = {
0058     .val_min =  7000000,
0059     .val_max = 20000000,
0060     .val_stp =  1000000,
0061     .reg_min = 1,
0062     .reg_max = 14,
0063 };
0064 
0065 static struct da9121_range da9121_6A_2phase_current = {
0066     .val_min =  7000000,
0067     .val_max = 12000000,
0068     .val_stp =  1000000,
0069     .reg_min = 1,
0070     .reg_max = 6,
0071 };
0072 
0073 static struct da9121_range da9121_5A_1phase_current = {
0074     .val_min =  3500000,
0075     .val_max = 10000000,
0076     .val_stp =   500000,
0077     .reg_min = 1,
0078     .reg_max = 14,
0079 };
0080 
0081 static struct da9121_range da9121_3A_1phase_current = {
0082     .val_min = 3500000,
0083     .val_max = 6000000,
0084     .val_stp =  500000,
0085     .reg_min = 1,
0086     .reg_max = 6,
0087 };
0088 
0089 static struct da9121_range da914x_40A_4phase_current = {
0090     .val_min = 26000000,
0091     .val_max = 78000000,
0092     .val_stp =  4000000,
0093     .reg_min = 1,
0094     .reg_max = 14,
0095 };
0096 
0097 static struct da9121_range da914x_20A_2phase_current = {
0098     .val_min = 13000000,
0099     .val_max = 39000000,
0100     .val_stp =  2000000,
0101     .reg_min = 1,
0102     .reg_max = 14,
0103 };
0104 
0105 struct da9121_variant_info {
0106     int num_bucks;
0107     int num_phases;
0108     struct da9121_range *current_range;
0109 };
0110 
0111 static const struct da9121_variant_info variant_parameters[] = {
0112     { 1, 2, &da9121_10A_2phase_current },   //DA9121_TYPE_DA9121_DA9130
0113     { 2, 1, &da9121_3A_1phase_current  },   //DA9121_TYPE_DA9220_DA9132
0114     { 2, 1, &da9121_5A_1phase_current  },   //DA9121_TYPE_DA9122_DA9131
0115     { 1, 2, &da9121_6A_2phase_current  },   //DA9121_TYPE_DA9217
0116     { 1, 4, &da914x_40A_4phase_current },   //DA9121_TYPE_DA9141
0117     { 1, 2, &da914x_20A_2phase_current },   //DA9121_TYPE_DA9142
0118 };
0119 
0120 struct da9121_field {
0121     unsigned int reg;
0122     unsigned int msk;
0123 };
0124 
0125 static const struct da9121_field da9121_current_field[2] = {
0126     { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
0127     { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
0128 };
0129 
0130 static const struct da9121_field da9121_mode_field[2] = {
0131     { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
0132     { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
0133 };
0134 
0135 struct status_event_data {
0136     int buck_id; /* 0=core, 1/2-buck */
0137     int reg_index;  /* index for status/event/mask register selection */
0138     int status_bit; /* bit masks... */
0139     int event_bit;
0140     int mask_bit;
0141     unsigned long notification; /* Notification for status inception */
0142     char *warn; /* if NULL, notify - otherwise dev_warn this string */
0143 };
0144 
0145 #define DA9121_STATUS(id, bank, name, notification, warning) \
0146     { id, bank, \
0147     DA9121_MASK_SYS_STATUS_##bank##_##name, \
0148     DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
0149     DA9121_MASK_SYS_MASK_##bank##_M_##name, \
0150     notification, warning }
0151 
0152 /* For second buck related event bits that are specific to DA9122, DA9220 variants */
0153 #define DA9xxx_STATUS(id, bank, name, notification, warning) \
0154     { id, bank, \
0155     DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
0156     DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
0157     DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
0158     notification, warning }
0159 
0160 /* The status signals that may need servicing, depending on device variant.
0161  * After assertion, they persist; so event is notified, the IRQ disabled,
0162  * and status polled until clear again and IRQ is reenabled.
0163  *
0164  * SG/PG1/PG2 should be set when device first powers up and should never
0165  * re-occur. When this driver starts, it is expected that these will have
0166  * self-cleared for when the IRQs are enabled, so these should never be seen.
0167  * If seen, the implication is that the device has reset.
0168  *
0169  * GPIO0/1/2 are not configured for use by default, so should not be seen.
0170  */
0171 static const struct status_event_data status_event_handling[] = {
0172     DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
0173     DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
0174     DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
0175     DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
0176     DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
0177     DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
0178     DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
0179     DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
0180     DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
0181     DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
0182     DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
0183     DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
0184     DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
0185     DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
0186 };
0187 
0188 static int da9121_get_current_limit(struct regulator_dev *rdev)
0189 {
0190     struct da9121 *chip = rdev_get_drvdata(rdev);
0191     int id = rdev_get_id(rdev);
0192     struct da9121_range *range =
0193         variant_parameters[chip->variant_id].current_range;
0194     unsigned int val = 0;
0195     int ret = 0;
0196 
0197     ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
0198     if (ret < 0) {
0199         dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
0200         goto error;
0201     }
0202 
0203     if (val < range->reg_min) {
0204         ret = -EACCES;
0205         goto error;
0206     }
0207 
0208     if (val > range->reg_max) {
0209         ret = -EINVAL;
0210         goto error;
0211     }
0212 
0213     return range->val_min + (range->val_stp * (val - range->reg_min));
0214 error:
0215     return ret;
0216 }
0217 
0218 static int da9121_ceiling_selector(struct regulator_dev *rdev,
0219         int min, int max,
0220         unsigned int *selector)
0221 {
0222     struct da9121 *chip = rdev_get_drvdata(rdev);
0223     struct da9121_range *range =
0224         variant_parameters[chip->variant_id].current_range;
0225     unsigned int level;
0226     unsigned int i = 0;
0227     unsigned int sel = 0;
0228     int ret = 0;
0229 
0230     if (range->val_min > max || range->val_max < min) {
0231         dev_err(chip->dev,
0232             "Requested current out of regulator capability\n");
0233         ret = -EINVAL;
0234         goto error;
0235     }
0236 
0237     level = range->val_max;
0238     for (i = range->reg_max; i >= range->reg_min; i--) {
0239         if (level <= max) {
0240             sel = i;
0241             break;
0242         }
0243         level -= range->val_stp;
0244     }
0245 
0246     if (level < min) {
0247         dev_err(chip->dev,
0248             "Best match falls below minimum requested current\n");
0249         ret = -EINVAL;
0250         goto error;
0251     }
0252 
0253     *selector = sel;
0254 error:
0255     return ret;
0256 }
0257 
0258 static int da9121_set_current_limit(struct regulator_dev *rdev,
0259                 int min_ua, int max_ua)
0260 {
0261     struct da9121 *chip = rdev_get_drvdata(rdev);
0262     int id = rdev_get_id(rdev);
0263     struct da9121_range *range =
0264         variant_parameters[chip->variant_id].current_range;
0265     unsigned int sel = 0;
0266     int ret = 0;
0267 
0268     if (min_ua < range->val_min ||
0269         max_ua > range->val_max) {
0270         ret = -EINVAL;
0271         goto error;
0272     }
0273 
0274     if (rdev->desc->ops->is_enabled(rdev)) {
0275         ret = -EBUSY;
0276         goto error;
0277     }
0278 
0279     ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
0280     if (ret < 0)
0281         goto error;
0282 
0283     ret = regmap_update_bits(chip->regmap,
0284                 da9121_current_field[id].reg,
0285                 da9121_current_field[id].msk,
0286                 (unsigned int)sel);
0287     if (ret < 0)
0288         dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
0289 
0290 error:
0291     return ret;
0292 }
0293 
0294 static unsigned int da9121_map_mode(unsigned int mode)
0295 {
0296     switch (mode) {
0297     case DA9121_BUCK_MODE_FORCE_PWM:
0298         return REGULATOR_MODE_FAST;
0299     case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
0300         return REGULATOR_MODE_NORMAL;
0301     case DA9121_BUCK_MODE_AUTO:
0302         return REGULATOR_MODE_IDLE;
0303     case DA9121_BUCK_MODE_FORCE_PFM:
0304         return REGULATOR_MODE_STANDBY;
0305     default:
0306         return REGULATOR_MODE_INVALID;
0307     }
0308 }
0309 
0310 static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
0311 {
0312     struct da9121 *chip = rdev_get_drvdata(rdev);
0313     int id = rdev_get_id(rdev);
0314     unsigned int val;
0315 
0316     switch (mode) {
0317     case REGULATOR_MODE_FAST:
0318         val = DA9121_BUCK_MODE_FORCE_PWM;
0319         break;
0320     case REGULATOR_MODE_NORMAL:
0321         val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
0322         break;
0323     case REGULATOR_MODE_IDLE:
0324         val = DA9121_BUCK_MODE_AUTO;
0325         break;
0326     case REGULATOR_MODE_STANDBY:
0327         val = DA9121_BUCK_MODE_FORCE_PFM;
0328         break;
0329     default:
0330         return -EINVAL;
0331     }
0332 
0333     return regmap_update_bits(chip->regmap,
0334                   da9121_mode_field[id].reg,
0335                   da9121_mode_field[id].msk,
0336                   val);
0337 }
0338 
0339 static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
0340 {
0341     struct da9121 *chip = rdev_get_drvdata(rdev);
0342     int id = rdev_get_id(rdev);
0343     unsigned int val, mode;
0344     int ret = 0;
0345 
0346     ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
0347     if (ret < 0) {
0348         dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
0349         return -EINVAL;
0350     }
0351 
0352     mode = da9121_map_mode(val & da9121_mode_field[id].msk);
0353     if (mode == REGULATOR_MODE_INVALID)
0354         return -EINVAL;
0355 
0356     return mode;
0357 }
0358 
0359 static const struct regulator_ops da9121_buck_ops = {
0360     .enable = regulator_enable_regmap,
0361     .disable = regulator_disable_regmap,
0362     .is_enabled = regulator_is_enabled_regmap,
0363     .set_voltage_sel = regulator_set_voltage_sel_regmap,
0364     .get_voltage_sel = regulator_get_voltage_sel_regmap,
0365     .list_voltage = regulator_list_voltage_linear,
0366     .get_current_limit = da9121_get_current_limit,
0367     .set_current_limit = da9121_set_current_limit,
0368     .set_mode = da9121_buck_set_mode,
0369     .get_mode = da9121_buck_get_mode,
0370 };
0371 
0372 static struct of_regulator_match da9121_matches[] = {
0373     [DA9121_IDX_BUCK1] = { .name = "buck1" },
0374     [DA9121_IDX_BUCK2] = { .name = "buck2" },
0375 };
0376 
0377 static int da9121_of_parse_cb(struct device_node *np,
0378                 const struct regulator_desc *desc,
0379                 struct regulator_config *config)
0380 {
0381     struct da9121 *chip = config->driver_data;
0382     struct da9121_pdata *pdata;
0383     struct gpio_desc *ena_gpiod;
0384 
0385     if (chip->pdata == NULL) {
0386         pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
0387         if (!pdata)
0388             return -ENOMEM;
0389     } else {
0390         pdata = chip->pdata;
0391     }
0392 
0393     pdata->num_buck++;
0394 
0395     if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
0396         dev_err(chip->dev, "Error: excessive regulators for device\n");
0397         return -ENODEV;
0398     }
0399 
0400     ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
0401                         GPIOD_OUT_HIGH |
0402                         GPIOD_FLAGS_BIT_NONEXCLUSIVE,
0403                         "da9121-enable");
0404     if (!IS_ERR(ena_gpiod))
0405         config->ena_gpiod = ena_gpiod;
0406 
0407     if (variant_parameters[chip->variant_id].num_bucks == 2) {
0408         uint32_t ripple_cancel;
0409         uint32_t ripple_reg;
0410         int ret;
0411 
0412         if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
0413                 "dlg,ripple-cancel", &ripple_cancel)) {
0414             if (pdata->num_buck > 1)
0415                 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
0416             else
0417                 ripple_reg = DA9121_REG_BUCK_BUCK1_7;
0418 
0419             ret = regmap_update_bits(chip->regmap, ripple_reg,
0420                 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
0421                 ripple_cancel);
0422             if (ret < 0)
0423                 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
0424         }
0425     }
0426 
0427     return 0;
0428 }
0429 
0430 #define DA9121_MIN_MV       300
0431 #define DA9121_MAX_MV       1900
0432 #define DA9121_STEP_MV      10
0433 #define DA9121_MIN_SEL      (DA9121_MIN_MV / DA9121_STEP_MV)
0434 #define DA9121_N_VOLTAGES   (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
0435                  + 1 + DA9121_MIN_SEL)
0436 
0437 static const struct regulator_desc da9121_reg = {
0438     .id = DA9121_IDX_BUCK1,
0439     .name = "da9121",
0440     .of_match = "buck1",
0441     .of_parse_cb = da9121_of_parse_cb,
0442     .owner = THIS_MODULE,
0443     .regulators_node = of_match_ptr("regulators"),
0444     .of_map_mode = da9121_map_mode,
0445     .ops = &da9121_buck_ops,
0446     .type = REGULATOR_VOLTAGE,
0447     .n_voltages = DA9121_N_VOLTAGES,
0448     .min_uV = DA9121_MIN_MV * 1000,
0449     .uV_step = DA9121_STEP_MV * 1000,
0450     .linear_min_sel = DA9121_MIN_SEL,
0451     .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
0452     .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0453     .enable_reg = DA9121_REG_BUCK_BUCK1_0,
0454     .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0455     /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
0456     .ramp_delay = 20000,
0457     /* tBUCK_EN */
0458     .enable_time = 20,
0459 };
0460 
0461 static const struct regulator_desc da9220_reg[2] = {
0462     {
0463         .id = DA9121_IDX_BUCK1,
0464         .name = "DA9220/DA9132 BUCK1",
0465         .of_match = "buck1",
0466         .of_parse_cb = da9121_of_parse_cb,
0467         .owner = THIS_MODULE,
0468         .regulators_node = of_match_ptr("regulators"),
0469         .of_map_mode = da9121_map_mode,
0470         .ops = &da9121_buck_ops,
0471         .type = REGULATOR_VOLTAGE,
0472         .n_voltages = DA9121_N_VOLTAGES,
0473         .min_uV = DA9121_MIN_MV * 1000,
0474         .uV_step = DA9121_STEP_MV * 1000,
0475         .linear_min_sel = DA9121_MIN_SEL,
0476         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
0477         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0478         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
0479         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0480     },
0481     {
0482         .id = DA9121_IDX_BUCK2,
0483         .name = "DA9220/DA9132 BUCK2",
0484         .of_match = "buck2",
0485         .of_parse_cb = da9121_of_parse_cb,
0486         .owner = THIS_MODULE,
0487         .regulators_node = of_match_ptr("regulators"),
0488         .of_map_mode = da9121_map_mode,
0489         .ops = &da9121_buck_ops,
0490         .type = REGULATOR_VOLTAGE,
0491         .n_voltages = DA9121_N_VOLTAGES,
0492         .min_uV = DA9121_MIN_MV * 1000,
0493         .uV_step = DA9121_STEP_MV * 1000,
0494         .linear_min_sel = DA9121_MIN_SEL,
0495         .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
0496         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0497         .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
0498         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0499     }
0500 };
0501 
0502 static const struct regulator_desc da9122_reg[2] = {
0503     {
0504         .id = DA9121_IDX_BUCK1,
0505         .name = "DA9122/DA9131 BUCK1",
0506         .of_match = "buck1",
0507         .of_parse_cb = da9121_of_parse_cb,
0508         .owner = THIS_MODULE,
0509         .regulators_node = of_match_ptr("regulators"),
0510         .of_map_mode = da9121_map_mode,
0511         .ops = &da9121_buck_ops,
0512         .type = REGULATOR_VOLTAGE,
0513         .n_voltages = DA9121_N_VOLTAGES,
0514         .min_uV = DA9121_MIN_MV * 1000,
0515         .uV_step = DA9121_STEP_MV * 1000,
0516         .linear_min_sel = DA9121_MIN_SEL,
0517         .enable_reg = DA9121_REG_BUCK_BUCK1_0,
0518         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0519         .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
0520         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0521     },
0522     {
0523         .id = DA9121_IDX_BUCK2,
0524         .name = "DA9122/DA9131 BUCK2",
0525         .of_match = "buck2",
0526         .of_parse_cb = da9121_of_parse_cb,
0527         .owner = THIS_MODULE,
0528         .regulators_node = of_match_ptr("regulators"),
0529         .of_map_mode = da9121_map_mode,
0530         .ops = &da9121_buck_ops,
0531         .type = REGULATOR_VOLTAGE,
0532         .n_voltages = DA9121_N_VOLTAGES,
0533         .min_uV = DA9121_MIN_MV * 1000,
0534         .uV_step = DA9121_STEP_MV * 1000,
0535         .linear_min_sel = DA9121_MIN_SEL,
0536         .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
0537         .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0538         .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
0539         .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0540     }
0541 };
0542 
0543 static const struct regulator_desc da9217_reg = {
0544     .id = DA9121_IDX_BUCK1,
0545     .name = "DA9217 BUCK1",
0546     .of_match = "buck1",
0547     .of_parse_cb = da9121_of_parse_cb,
0548     .owner = THIS_MODULE,
0549     .regulators_node = of_match_ptr("regulators"),
0550     .of_map_mode = da9121_map_mode,
0551     .ops = &da9121_buck_ops,
0552     .type = REGULATOR_VOLTAGE,
0553     .n_voltages = DA9121_N_VOLTAGES,
0554     .min_uV = DA9121_MIN_MV * 1000,
0555     .uV_step = DA9121_STEP_MV * 1000,
0556     .linear_min_sel = DA9121_MIN_SEL,
0557     .enable_reg = DA9121_REG_BUCK_BUCK1_0,
0558     .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0559     .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
0560     .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0561 };
0562 
0563 #define DA914X_MIN_MV       500
0564 #define DA914X_MAX_MV       1300
0565 #define DA914X_STEP_MV      10
0566 #define DA914X_MIN_SEL      (DA914X_MIN_MV / DA914X_STEP_MV)
0567 #define DA914X_N_VOLTAGES   (((DA914X_MAX_MV - DA914X_MIN_MV) / DA914X_STEP_MV) \
0568                  + 1 + DA914X_MIN_SEL)
0569 
0570 static const struct regulator_desc da9141_reg = {
0571     .id = DA9121_IDX_BUCK1,
0572     .name = "DA9141",
0573     .of_match = "buck1",
0574     .of_parse_cb = da9121_of_parse_cb,
0575     .owner = THIS_MODULE,
0576     .regulators_node = of_match_ptr("regulators"),
0577     .of_map_mode = da9121_map_mode,
0578     .ops = &da9121_buck_ops,
0579     .type = REGULATOR_VOLTAGE,
0580     .n_voltages = DA914X_N_VOLTAGES,
0581     .min_uV = DA914X_MIN_MV * 1000,
0582     .uV_step = DA914X_STEP_MV * 1000,
0583     .linear_min_sel = DA914X_MIN_SEL,
0584     .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
0585     .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0586     .enable_reg = DA9121_REG_BUCK_BUCK1_0,
0587     .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0588 };
0589 
0590 static const struct regulator_desc da9142_reg = {
0591     .id = DA9121_IDX_BUCK1,
0592     .name = "DA9142 BUCK1",
0593     .of_match = "buck1",
0594     .of_parse_cb = da9121_of_parse_cb,
0595     .owner = THIS_MODULE,
0596     .regulators_node = of_match_ptr("regulators"),
0597     .of_map_mode = da9121_map_mode,
0598     .ops = &da9121_buck_ops,
0599     .type = REGULATOR_VOLTAGE,
0600     .n_voltages = DA914X_N_VOLTAGES,
0601     .min_uV = DA914X_MIN_MV * 1000,
0602     .uV_step = DA914X_STEP_MV * 1000,
0603     .linear_min_sel = DA914X_MIN_SEL,
0604     .enable_reg = DA9121_REG_BUCK_BUCK1_0,
0605     .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
0606     .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
0607     .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
0608 };
0609 
0610 
0611 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
0612     [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
0613     [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
0614     [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
0615     [DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
0616     [DA9121_TYPE_DA9141] = { &da9141_reg, NULL },
0617     [DA9121_TYPE_DA9142] = { &da9142_reg, NULL },
0618 };
0619 
0620 static void da9121_status_poll_on(struct work_struct *work)
0621 {
0622     struct da9121 *chip = container_of(work, struct da9121, work.work);
0623     int status[3] = {0};
0624     int clear[3] = {0};
0625     unsigned long delay;
0626     int i;
0627     int ret;
0628 
0629     ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
0630     if (ret < 0) {
0631         dev_err(chip->dev,
0632             "Failed to read STATUS registers: %d\n", ret);
0633         goto error;
0634     }
0635 
0636     /* Possible events are tested to be within range for the variant, potentially
0637      * masked by the IRQ handler (not just warned about), as having been masked,
0638      * and the respective state cleared - then flagged to unmask for next IRQ.
0639      */
0640     for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
0641         const struct status_event_data *item = &status_event_handling[i];
0642         int reg_idx = item->reg_index;
0643         bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
0644         bool supported = (item->warn == NULL);
0645         bool persisting = (chip->persistent[reg_idx] & item->event_bit);
0646         bool now_cleared = !(status[reg_idx] & item->status_bit);
0647 
0648         if (relevant && supported && persisting && now_cleared) {
0649             clear[reg_idx] |= item->mask_bit;
0650             chip->persistent[reg_idx] &= ~item->event_bit;
0651         }
0652     }
0653 
0654     for (i = 0; i < 2; i++) {
0655         if (clear[i]) {
0656             unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
0657             unsigned int mbit = clear[i];
0658 
0659             ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
0660             if (ret < 0) {
0661                 dev_err(chip->dev,
0662                     "Failed to unmask 0x%02x %d\n",
0663                     reg, ret);
0664                 goto error;
0665             }
0666         }
0667     }
0668 
0669     if (chip->persistent[0] | chip->persistent[1]) {
0670         delay = msecs_to_jiffies(chip->passive_delay);
0671         queue_delayed_work(system_freezable_wq, &chip->work, delay);
0672     }
0673 
0674 error:
0675     return;
0676 }
0677 
0678 static irqreturn_t da9121_irq_handler(int irq, void *data)
0679 {
0680     struct da9121 *chip = data;
0681     struct regulator_dev *rdev;
0682     int event[3] = {0};
0683     int handled[3] = {0};
0684     int mask[3] = {0};
0685     int ret = IRQ_NONE;
0686     int i;
0687     int err;
0688 
0689     err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
0690     if (err < 0) {
0691         dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
0692         ret = IRQ_NONE;
0693         goto error;
0694     }
0695 
0696     err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
0697     if (err < 0) {
0698         dev_err(chip->dev,
0699             "Failed to read MASK registers: %d\n", ret);
0700         ret = IRQ_NONE;
0701         goto error;
0702     }
0703 
0704     rdev = chip->rdev[DA9121_IDX_BUCK1];
0705 
0706     /* Possible events are tested to be within range for the variant, currently
0707      * enabled, and having triggered this IRQ. The event may then be notified,
0708      * or a warning given for unexpected events - those from device POR, and
0709      * currently unsupported GPIO configurations.
0710      */
0711     for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
0712         const struct status_event_data *item = &status_event_handling[i];
0713         int reg_idx = item->reg_index;
0714         bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
0715         bool enabled = !(mask[reg_idx] & item->mask_bit);
0716         bool active = (event[reg_idx] & item->event_bit);
0717         bool notify = (item->warn == NULL);
0718 
0719         if (relevant && enabled && active) {
0720             if (notify) {
0721                 chip->persistent[reg_idx] |= item->event_bit;
0722                 regulator_notifier_call_chain(rdev, item->notification, NULL);
0723             } else {
0724                 dev_warn(chip->dev, item->warn);
0725                 handled[reg_idx] |= item->event_bit;
0726                 ret = IRQ_HANDLED;
0727             }
0728         }
0729     }
0730 
0731     for (i = 0; i < 3; i++) {
0732         if (event[i] != handled[i]) {
0733             dev_warn(chip->dev,
0734                 "Unhandled event(s) in bank%d 0x%02x\n", i,
0735                 event[i] ^ handled[i]);
0736         }
0737     }
0738 
0739     /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
0740     for (i = 0; i < 2; i++) {
0741         if (handled[i]) {
0742             unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
0743             unsigned int mbit = handled[i];
0744 
0745             err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
0746             if (err < 0) {
0747                 dev_err(chip->dev,
0748                     "Failed to mask 0x%02x interrupt %d\n",
0749                     reg, err);
0750                 ret = IRQ_NONE;
0751                 goto error;
0752             }
0753         }
0754     }
0755 
0756     /* clear the events */
0757     if (handled[0] | handled[1] | handled[2]) {
0758         err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
0759         if (err < 0) {
0760             dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
0761             ret = IRQ_NONE;
0762             goto error;
0763         }
0764     }
0765 
0766     queue_delayed_work(system_freezable_wq, &chip->work, 0);
0767 error:
0768     return ret;
0769 }
0770 
0771 static int da9121_set_regulator_config(struct da9121 *chip)
0772 {
0773     struct regulator_config config = { };
0774     unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
0775     int ret = 0;
0776     int i;
0777 
0778     for (i = 0; i < max_matches; i++) {
0779         const struct regulator_desc *regl_desc =
0780             local_da9121_regulators[chip->variant_id][i];
0781 
0782         config.dev = chip->dev;
0783         config.driver_data = chip;
0784         config.regmap = chip->regmap;
0785 
0786         chip->rdev[i] = devm_regulator_register(chip->dev,
0787                     regl_desc, &config);
0788         if (IS_ERR(chip->rdev[i])) {
0789             dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
0790                 regl_desc->name, (i+1), max_matches);
0791             ret = PTR_ERR(chip->rdev[i]);
0792             goto error;
0793         }
0794     }
0795 
0796 error:
0797     return ret;
0798 }
0799 
0800 /* DA9121 chip register model */
0801 static const struct regmap_range da9121_1ch_readable_ranges[] = {
0802     regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
0803     regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
0804     regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
0805     regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
0806     regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
0807 };
0808 
0809 static const struct regmap_access_table da9121_1ch_readable_table = {
0810     .yes_ranges = da9121_1ch_readable_ranges,
0811     .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
0812 };
0813 
0814 static const struct regmap_range da9121_2ch_readable_ranges[] = {
0815     regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
0816     regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
0817     regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
0818     regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
0819     regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
0820     regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
0821 };
0822 
0823 static const struct regmap_access_table da9121_2ch_readable_table = {
0824     .yes_ranges = da9121_2ch_readable_ranges,
0825     .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
0826 };
0827 
0828 static const struct regmap_range da9121_1ch_writeable_ranges[] = {
0829     regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
0830     regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
0831     regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
0832     regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
0833     regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
0834 };
0835 
0836 static const struct regmap_access_table da9121_1ch_writeable_table = {
0837     .yes_ranges = da9121_1ch_writeable_ranges,
0838     .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
0839 };
0840 
0841 static const struct regmap_range da9121_2ch_writeable_ranges[] = {
0842     regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
0843     regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
0844     regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
0845     regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
0846     regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
0847     regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
0848     regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
0849 };
0850 
0851 static const struct regmap_access_table da9121_2ch_writeable_table = {
0852     .yes_ranges = da9121_2ch_writeable_ranges,
0853     .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
0854 };
0855 
0856 
0857 static const struct regmap_range da9121_volatile_ranges[] = {
0858     regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
0859     regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
0860     regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
0861 };
0862 
0863 static const struct regmap_access_table da9121_volatile_table = {
0864     .yes_ranges = da9121_volatile_ranges,
0865     .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
0866 };
0867 
0868 /* DA9121 regmap config for 1 channel variants */
0869 static struct regmap_config da9121_1ch_regmap_config = {
0870     .reg_bits = 8,
0871     .val_bits = 8,
0872     .max_register = DA9121_REG_OTP_CONFIG_ID,
0873     .rd_table = &da9121_1ch_readable_table,
0874     .wr_table = &da9121_1ch_writeable_table,
0875     .volatile_table = &da9121_volatile_table,
0876     .cache_type = REGCACHE_RBTREE,
0877 };
0878 
0879 /* DA9121 regmap config for 2 channel variants */
0880 static struct regmap_config da9121_2ch_regmap_config = {
0881     .reg_bits = 8,
0882     .val_bits = 8,
0883     .max_register = DA9121_REG_OTP_CONFIG_ID,
0884     .rd_table = &da9121_2ch_readable_table,
0885     .wr_table = &da9121_2ch_writeable_table,
0886     .volatile_table = &da9121_volatile_table,
0887     .cache_type = REGCACHE_RBTREE,
0888 };
0889 
0890 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
0891 {
0892     u32 device_id;
0893     u32 variant_id;
0894     u8 variant_mrc, variant_vrc;
0895     char *type;
0896     bool config_match = false;
0897     int ret = 0;
0898 
0899     ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
0900     if (ret < 0) {
0901         dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
0902         goto error;
0903     }
0904 
0905     ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
0906     if (ret < 0) {
0907         dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
0908         goto error;
0909     }
0910 
0911     if ((device_id != DA9121_DEVICE_ID) && (device_id != DA914x_DEVICE_ID)) {
0912         dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
0913         ret = -ENODEV;
0914         goto error;
0915     }
0916 
0917     variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
0918 
0919     switch (chip->subvariant_id) {
0920     case DA9121_SUBTYPE_DA9121:
0921         type = "DA9121";
0922         config_match = (variant_vrc == DA9121_VARIANT_VRC);
0923         break;
0924     case DA9121_SUBTYPE_DA9130:
0925         type = "DA9130";
0926         config_match = (variant_vrc == DA9130_VARIANT_VRC);
0927         break;
0928     case DA9121_SUBTYPE_DA9220:
0929         type = "DA9220";
0930         config_match = (variant_vrc == DA9220_VARIANT_VRC);
0931         break;
0932     case DA9121_SUBTYPE_DA9132:
0933         type = "DA9132";
0934         config_match = (variant_vrc == DA9132_VARIANT_VRC);
0935         break;
0936     case DA9121_SUBTYPE_DA9122:
0937         type = "DA9122";
0938         config_match = (variant_vrc == DA9122_VARIANT_VRC);
0939         break;
0940     case DA9121_SUBTYPE_DA9131:
0941         type = "DA9131";
0942         config_match = (variant_vrc == DA9131_VARIANT_VRC);
0943         break;
0944     case DA9121_SUBTYPE_DA9217:
0945         type = "DA9217";
0946         config_match = (variant_vrc == DA9217_VARIANT_VRC);
0947         break;
0948     default:
0949         type = "Unknown";
0950         break;
0951     }
0952 
0953     if (device_id == DA914x_DEVICE_ID) {
0954         switch (chip->subvariant_id) {
0955         case DA9121_SUBTYPE_DA9141:
0956             type = "DA9141";
0957             config_match = (variant_vrc == DA9141_VARIANT_VRC);
0958             break;
0959         case DA9121_SUBTYPE_DA9142:
0960             type = "DA9142";
0961             config_match = (variant_vrc == DA9142_VARIANT_VRC);
0962             break;
0963         default:
0964             type = "Unknown";
0965             break;
0966         }
0967     }
0968 
0969     dev_info(chip->dev,
0970          "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
0971          device_id, variant_id, type);
0972 
0973     if (!config_match) {
0974         dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
0975         ret = -EINVAL;
0976         goto error;
0977     }
0978 
0979     variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
0980             >> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
0981 
0982     if (((device_id == DA9121_DEVICE_ID) &&
0983          (variant_mrc < DA9121_VARIANT_MRC_BASE)) ||
0984         ((device_id == DA914x_DEVICE_ID) &&
0985          (variant_mrc != DA914x_VARIANT_MRC_BASE))) {
0986         dev_err(chip->dev,
0987             "Cannot support variant MRC: 0x%02X\n", variant_mrc);
0988         ret = -EINVAL;
0989     }
0990 error:
0991     return ret;
0992 }
0993 
0994 static int da9121_assign_chip_model(struct i2c_client *i2c,
0995             struct da9121 *chip)
0996 {
0997     struct regmap_config *regmap;
0998     int ret = 0;
0999 
1000     chip->dev = &i2c->dev;
1001 
1002     /* Use configured subtype to select the regulator descriptor index and
1003      * register map, common to both consumer and automotive grade variants
1004      */
1005     switch (chip->subvariant_id) {
1006     case DA9121_SUBTYPE_DA9121:
1007     case DA9121_SUBTYPE_DA9130:
1008         chip->variant_id = DA9121_TYPE_DA9121_DA9130;
1009         regmap = &da9121_1ch_regmap_config;
1010         break;
1011     case DA9121_SUBTYPE_DA9217:
1012         chip->variant_id = DA9121_TYPE_DA9217;
1013         regmap = &da9121_1ch_regmap_config;
1014         break;
1015     case DA9121_SUBTYPE_DA9122:
1016     case DA9121_SUBTYPE_DA9131:
1017         chip->variant_id = DA9121_TYPE_DA9122_DA9131;
1018         regmap = &da9121_2ch_regmap_config;
1019         break;
1020     case DA9121_SUBTYPE_DA9220:
1021     case DA9121_SUBTYPE_DA9132:
1022         chip->variant_id = DA9121_TYPE_DA9220_DA9132;
1023         regmap = &da9121_2ch_regmap_config;
1024         break;
1025     case DA9121_SUBTYPE_DA9141:
1026         chip->variant_id = DA9121_TYPE_DA9141;
1027         regmap = &da9121_1ch_regmap_config;
1028         break;
1029     case DA9121_SUBTYPE_DA9142:
1030         chip->variant_id = DA9121_TYPE_DA9142;
1031         regmap = &da9121_2ch_regmap_config;
1032         break;
1033     default:
1034         return -EINVAL;
1035     }
1036 
1037     /* Set these up for of_regulator_match call which may want .of_map_modes */
1038     da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
1039     da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
1040 
1041     chip->regmap = devm_regmap_init_i2c(i2c, regmap);
1042     if (IS_ERR(chip->regmap)) {
1043         ret = PTR_ERR(chip->regmap);
1044         dev_err(chip->dev, "Failed to configure a register map: %d\n",
1045             ret);
1046         return ret;
1047     }
1048 
1049     ret = da9121_check_device_type(i2c, chip);
1050 
1051     return ret;
1052 }
1053 
1054 static int da9121_config_irq(struct i2c_client *i2c,
1055             struct da9121 *chip)
1056 {
1057     unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1058     const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
1059     int ret = 0;
1060 
1061     chip->chip_irq = i2c->irq;
1062 
1063     if (chip->chip_irq != 0) {
1064         if (!of_property_read_u32(chip->dev->of_node,
1065                       "dlg,irq-polling-delay-passive-ms",
1066                       &p_delay)) {
1067             if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
1068                 p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
1069                 dev_warn(chip->dev,
1070                      "Out-of-range polling period %d ms\n",
1071                      p_delay);
1072                 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1073             }
1074         }
1075 
1076         chip->passive_delay = p_delay;
1077 
1078         ret = request_threaded_irq(chip->chip_irq, NULL,
1079                     da9121_irq_handler,
1080                     IRQF_TRIGGER_LOW|IRQF_ONESHOT,
1081                     "da9121", chip);
1082         if (ret != 0) {
1083             dev_err(chip->dev, "Failed IRQ request: %d\n",
1084                 chip->chip_irq);
1085             goto error;
1086         }
1087 
1088         ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1089         if (ret != 0) {
1090             dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
1091                 ret);
1092             goto regmap_error;
1093         }
1094 
1095         INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
1096         dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
1097              chip->passive_delay);
1098     }
1099 error:
1100     return ret;
1101 regmap_error:
1102     free_irq(chip->chip_irq, chip);
1103     return ret;
1104 }
1105 
1106 static const struct of_device_id da9121_dt_ids[] = {
1107     { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
1108     { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
1109     { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
1110     { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
1111     { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
1112     { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
1113     { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
1114     { .compatible = "dlg,da9141", .data = (void *) DA9121_SUBTYPE_DA9141 },
1115     { .compatible = "dlg,da9142", .data = (void *) DA9121_SUBTYPE_DA9142 },
1116     { }
1117 };
1118 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
1119 
1120 static inline int da9121_of_get_id(struct device *dev)
1121 {
1122     const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
1123 
1124     if (!id) {
1125         dev_err(dev, "%s: Failed\n", __func__);
1126         return -EINVAL;
1127     }
1128     return (uintptr_t)id->data;
1129 }
1130 
1131 static int da9121_i2c_probe(struct i2c_client *i2c,
1132                 const struct i2c_device_id *id)
1133 {
1134     struct da9121 *chip;
1135     const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1136     int ret = 0;
1137 
1138     chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
1139     if (!chip) {
1140         ret = -ENOMEM;
1141         goto error;
1142     }
1143 
1144     chip->pdata = i2c->dev.platform_data;
1145     chip->subvariant_id = da9121_of_get_id(&i2c->dev);
1146 
1147     ret = da9121_assign_chip_model(i2c, chip);
1148     if (ret < 0)
1149         goto error;
1150 
1151     ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1152     if (ret != 0) {
1153         dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1154         goto error;
1155     }
1156 
1157     ret = da9121_set_regulator_config(chip);
1158     if (ret < 0)
1159         goto error;
1160 
1161     ret = da9121_config_irq(i2c, chip);
1162 
1163 error:
1164     return ret;
1165 }
1166 
1167 static int da9121_i2c_remove(struct i2c_client *i2c)
1168 {
1169     struct da9121 *chip = i2c_get_clientdata(i2c);
1170     const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1171     int ret;
1172 
1173     free_irq(chip->chip_irq, chip);
1174     cancel_delayed_work_sync(&chip->work);
1175 
1176     ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1177     if (ret != 0)
1178         dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1179     return 0;
1180 }
1181 
1182 static const struct i2c_device_id da9121_i2c_id[] = {
1183     {"da9121", DA9121_TYPE_DA9121_DA9130},
1184     {"da9130", DA9121_TYPE_DA9121_DA9130},
1185     {"da9217", DA9121_TYPE_DA9217},
1186     {"da9122", DA9121_TYPE_DA9122_DA9131},
1187     {"da9131", DA9121_TYPE_DA9122_DA9131},
1188     {"da9220", DA9121_TYPE_DA9220_DA9132},
1189     {"da9132", DA9121_TYPE_DA9220_DA9132},
1190     {"da9141", DA9121_TYPE_DA9141},
1191     {"da9142", DA9121_TYPE_DA9142},
1192     {},
1193 };
1194 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1195 
1196 static struct i2c_driver da9121_regulator_driver = {
1197     .driver = {
1198         .name = "da9121",
1199         .of_match_table = of_match_ptr(da9121_dt_ids),
1200     },
1201     .probe = da9121_i2c_probe,
1202     .remove = da9121_i2c_remove,
1203     .id_table = da9121_i2c_id,
1204 };
1205 
1206 module_i2c_driver(da9121_regulator_driver);
1207 
1208 MODULE_LICENSE("GPL v2");
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!