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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * AXP20X and AXP22X PMICs' ACIN power supply driver4 *5 * Copyright (C) 2016 Free Electrons6 * Quentin Schulz <quentin.schulz@free-electrons.com>7 */8 9#include <linux/device.h>10#include <linux/init.h>11#include <linux/interrupt.h>12#include <linux/kernel.h>13#include <linux/mfd/axp20x.h>14#include <linux/module.h>15#include <linux/of.h>16#include <linux/platform_device.h>17#include <linux/pm.h>18#include <linux/power_supply.h>19#include <linux/regmap.h>20#include <linux/slab.h>21#include <linux/iio/consumer.h>22 23#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)24#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)25 26#define AXP813_ACIN_PATH_SEL BIT(7)27#define AXP813_ACIN_PATH_SEL_TO_BIT(x) (!!(x) << 7)28 29#define AXP813_VHOLD_MASK GENMASK(5, 3)30#define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3)31#define AXP813_VHOLD_REG_TO_UV(x) \32 (((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000)33 34#define AXP813_CURR_LIMIT_MASK GENMASK(2, 0)35#define AXP813_CURR_LIMIT_UA_TO_BIT(x) (((x) / 500000) - 3)36#define AXP813_CURR_LIMIT_REG_TO_UA(x) \37 ((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000)38 39#define DRVNAME "axp20x-ac-power-supply"40 41struct axp20x_ac_power {42 struct regmap *regmap;43 struct power_supply *supply;44 struct iio_channel *acin_v;45 struct iio_channel *acin_i;46 bool has_acin_path_sel;47 unsigned int num_irqs;48 unsigned int irqs[] __counted_by(num_irqs);49};50 51static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)52{53 struct axp20x_ac_power *power = devid;54 55 power_supply_changed(power->supply);56 57 return IRQ_HANDLED;58}59 60static int axp20x_ac_power_get_property(struct power_supply *psy,61 enum power_supply_property psp,62 union power_supply_propval *val)63{64 struct axp20x_ac_power *power = power_supply_get_drvdata(psy);65 int ret, reg;66 67 switch (psp) {68 case POWER_SUPPLY_PROP_HEALTH:69 ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);70 if (ret)71 return ret;72 73 if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) {74 val->intval = POWER_SUPPLY_HEALTH_GOOD;75 return 0;76 }77 78 val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;79 return 0;80 81 case POWER_SUPPLY_PROP_PRESENT:82 ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);83 if (ret)84 return ret;85 86 val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT);87 return 0;88 89 case POWER_SUPPLY_PROP_ONLINE:90 ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);91 if (ret)92 return ret;93 94 val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);95 96 /* ACIN_PATH_SEL disables ACIN even if ACIN_AVAIL is set. */97 if (val->intval && power->has_acin_path_sel) {98 ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL,99 ®);100 if (ret)101 return ret;102 103 val->intval = !!(reg & AXP813_ACIN_PATH_SEL);104 }105 106 return 0;107 108 case POWER_SUPPLY_PROP_VOLTAGE_NOW:109 ret = iio_read_channel_processed(power->acin_v, &val->intval);110 if (ret)111 return ret;112 113 /* IIO framework gives mV but Power Supply framework gives uV */114 val->intval *= 1000;115 116 return 0;117 118 case POWER_SUPPLY_PROP_CURRENT_NOW:119 ret = iio_read_channel_processed(power->acin_i, &val->intval);120 if (ret)121 return ret;122 123 /* IIO framework gives mA but Power Supply framework gives uA */124 val->intval *= 1000;125 126 return 0;127 128 case POWER_SUPPLY_PROP_VOLTAGE_MIN:129 ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®);130 if (ret)131 return ret;132 133 val->intval = AXP813_VHOLD_REG_TO_UV(reg);134 135 return 0;136 137 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:138 ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®);139 if (ret)140 return ret;141 142 val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg);143 /* AXP813 datasheet defines values 11x as 4000mA */144 if (val->intval > 4000000)145 val->intval = 4000000;146 147 return 0;148 149 default:150 return -EINVAL;151 }152 153 return -EINVAL;154}155 156static int axp813_ac_power_set_property(struct power_supply *psy,157 enum power_supply_property psp,158 const union power_supply_propval *val)159{160 struct axp20x_ac_power *power = power_supply_get_drvdata(psy);161 162 switch (psp) {163 case POWER_SUPPLY_PROP_ONLINE:164 return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,165 AXP813_ACIN_PATH_SEL,166 AXP813_ACIN_PATH_SEL_TO_BIT(val->intval));167 168 case POWER_SUPPLY_PROP_VOLTAGE_MIN:169 if (val->intval < 4000000 || val->intval > 4700000)170 return -EINVAL;171 172 return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,173 AXP813_VHOLD_MASK,174 AXP813_VHOLD_UV_TO_BIT(val->intval));175 176 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:177 if (val->intval < 1500000 || val->intval > 4000000)178 return -EINVAL;179 180 return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,181 AXP813_CURR_LIMIT_MASK,182 AXP813_CURR_LIMIT_UA_TO_BIT(val->intval));183 184 default:185 return -EINVAL;186 }187 188 return -EINVAL;189}190 191static int axp813_ac_power_prop_writeable(struct power_supply *psy,192 enum power_supply_property psp)193{194 return psp == POWER_SUPPLY_PROP_ONLINE ||195 psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||196 psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;197}198 199static enum power_supply_property axp20x_ac_power_properties[] = {200 POWER_SUPPLY_PROP_HEALTH,201 POWER_SUPPLY_PROP_PRESENT,202 POWER_SUPPLY_PROP_ONLINE,203 POWER_SUPPLY_PROP_VOLTAGE_NOW,204 POWER_SUPPLY_PROP_CURRENT_NOW,205};206 207static enum power_supply_property axp22x_ac_power_properties[] = {208 POWER_SUPPLY_PROP_HEALTH,209 POWER_SUPPLY_PROP_PRESENT,210 POWER_SUPPLY_PROP_ONLINE,211};212 213static enum power_supply_property axp813_ac_power_properties[] = {214 POWER_SUPPLY_PROP_HEALTH,215 POWER_SUPPLY_PROP_PRESENT,216 POWER_SUPPLY_PROP_ONLINE,217 POWER_SUPPLY_PROP_VOLTAGE_MIN,218 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,219};220 221static const struct power_supply_desc axp20x_ac_power_desc = {222 .name = "axp20x-ac",223 .type = POWER_SUPPLY_TYPE_MAINS,224 .properties = axp20x_ac_power_properties,225 .num_properties = ARRAY_SIZE(axp20x_ac_power_properties),226 .get_property = axp20x_ac_power_get_property,227};228 229static const struct power_supply_desc axp22x_ac_power_desc = {230 .name = "axp22x-ac",231 .type = POWER_SUPPLY_TYPE_MAINS,232 .properties = axp22x_ac_power_properties,233 .num_properties = ARRAY_SIZE(axp22x_ac_power_properties),234 .get_property = axp20x_ac_power_get_property,235};236 237static const struct power_supply_desc axp813_ac_power_desc = {238 .name = "axp813-ac",239 .type = POWER_SUPPLY_TYPE_MAINS,240 .properties = axp813_ac_power_properties,241 .num_properties = ARRAY_SIZE(axp813_ac_power_properties),242 .property_is_writeable = axp813_ac_power_prop_writeable,243 .get_property = axp20x_ac_power_get_property,244 .set_property = axp813_ac_power_set_property,245};246 247static const char * const axp20x_irq_names[] = {248 "ACIN_PLUGIN",249 "ACIN_REMOVAL",250};251 252struct axp_data {253 const struct power_supply_desc *power_desc;254 const char * const *irq_names;255 unsigned int num_irq_names;256 bool acin_adc;257 bool acin_path_sel;258};259 260static const struct axp_data axp20x_data = {261 .power_desc = &axp20x_ac_power_desc,262 .irq_names = axp20x_irq_names,263 .num_irq_names = ARRAY_SIZE(axp20x_irq_names),264 .acin_adc = true,265 .acin_path_sel = false,266};267 268static const struct axp_data axp22x_data = {269 .power_desc = &axp22x_ac_power_desc,270 .irq_names = axp20x_irq_names,271 .num_irq_names = ARRAY_SIZE(axp20x_irq_names),272 .acin_adc = false,273 .acin_path_sel = false,274};275 276static const struct axp_data axp813_data = {277 .power_desc = &axp813_ac_power_desc,278 .irq_names = axp20x_irq_names,279 .num_irq_names = ARRAY_SIZE(axp20x_irq_names),280 .acin_adc = false,281 .acin_path_sel = true,282};283 284#ifdef CONFIG_PM_SLEEP285static int axp20x_ac_power_suspend(struct device *dev)286{287 struct axp20x_ac_power *power = dev_get_drvdata(dev);288 int i = 0;289 290 /*291 * Allow wake via ACIN_PLUGIN only.292 *293 * As nested threaded IRQs are not automatically disabled during294 * suspend, we must explicitly disable the remainder of the IRQs.295 */296 if (device_may_wakeup(&power->supply->dev))297 enable_irq_wake(power->irqs[i++]);298 while (i < power->num_irqs)299 disable_irq(power->irqs[i++]);300 301 return 0;302}303 304static int axp20x_ac_power_resume(struct device *dev)305{306 struct axp20x_ac_power *power = dev_get_drvdata(dev);307 int i = 0;308 309 if (device_may_wakeup(&power->supply->dev))310 disable_irq_wake(power->irqs[i++]);311 while (i < power->num_irqs)312 enable_irq(power->irqs[i++]);313 314 return 0;315}316#endif317 318static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend,319 axp20x_ac_power_resume);320 321static int axp20x_ac_power_probe(struct platform_device *pdev)322{323 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);324 struct power_supply_config psy_cfg = {};325 struct axp20x_ac_power *power;326 const struct axp_data *axp_data;327 int i, irq, ret;328 329 if (!of_device_is_available(pdev->dev.of_node))330 return -ENODEV;331 332 if (!axp20x) {333 dev_err(&pdev->dev, "Parent drvdata not set\n");334 return -EINVAL;335 }336 337 axp_data = of_device_get_match_data(&pdev->dev);338 339 power = devm_kzalloc(&pdev->dev,340 struct_size(power, irqs, axp_data->num_irq_names),341 GFP_KERNEL);342 if (!power)343 return -ENOMEM;344 345 if (axp_data->acin_adc) {346 power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");347 if (IS_ERR(power->acin_v)) {348 if (PTR_ERR(power->acin_v) == -ENODEV)349 return -EPROBE_DEFER;350 return PTR_ERR(power->acin_v);351 }352 353 power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i");354 if (IS_ERR(power->acin_i)) {355 if (PTR_ERR(power->acin_i) == -ENODEV)356 return -EPROBE_DEFER;357 return PTR_ERR(power->acin_i);358 }359 }360 361 power->regmap = dev_get_regmap(pdev->dev.parent, NULL);362 power->has_acin_path_sel = axp_data->acin_path_sel;363 power->num_irqs = axp_data->num_irq_names;364 365 platform_set_drvdata(pdev, power);366 367 psy_cfg.of_node = pdev->dev.of_node;368 psy_cfg.drv_data = power;369 370 power->supply = devm_power_supply_register(&pdev->dev,371 axp_data->power_desc,372 &psy_cfg);373 if (IS_ERR(power->supply))374 return PTR_ERR(power->supply);375 376 /* Request irqs after registering, as irqs may trigger immediately */377 for (i = 0; i < axp_data->num_irq_names; i++) {378 irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);379 if (irq < 0)380 return irq;381 382 power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);383 ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],384 axp20x_ac_power_irq, 0,385 DRVNAME, power);386 if (ret < 0) {387 dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",388 axp_data->irq_names[i], ret);389 return ret;390 }391 }392 393 return 0;394}395 396static const struct of_device_id axp20x_ac_power_match[] = {397 {398 .compatible = "x-powers,axp202-ac-power-supply",399 .data = &axp20x_data,400 }, {401 .compatible = "x-powers,axp221-ac-power-supply",402 .data = &axp22x_data,403 }, {404 .compatible = "x-powers,axp813-ac-power-supply",405 .data = &axp813_data,406 }, { /* sentinel */ }407};408MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);409 410static struct platform_driver axp20x_ac_power_driver = {411 .probe = axp20x_ac_power_probe,412 .driver = {413 .name = DRVNAME,414 .of_match_table = axp20x_ac_power_match,415 .pm = &axp20x_ac_power_pm_ops,416 },417};418 419module_platform_driver(axp20x_ac_power_driver);420 421MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");422MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver");423MODULE_LICENSE("GPL");424