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426 lines
11 KiB
426 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* AXP20X and AXP22X PMICs' ACIN power supply driver |
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* |
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* Copyright (C) 2016 Free Electrons |
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* Quentin Schulz <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/axp20x.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/pm.h> |
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#include <linux/power_supply.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/iio/consumer.h> |
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#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7) |
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#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6) |
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#define AXP813_ACIN_PATH_SEL BIT(7) |
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#define AXP813_ACIN_PATH_SEL_TO_BIT(x) (!!(x) << 7) |
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#define AXP813_VHOLD_MASK GENMASK(5, 3) |
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#define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3) |
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#define AXP813_VHOLD_REG_TO_UV(x) \ |
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(((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000) |
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#define AXP813_CURR_LIMIT_MASK GENMASK(2, 0) |
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#define AXP813_CURR_LIMIT_UA_TO_BIT(x) (((x) / 500000) - 3) |
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#define AXP813_CURR_LIMIT_REG_TO_UA(x) \ |
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((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000) |
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#define DRVNAME "axp20x-ac-power-supply" |
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struct axp20x_ac_power { |
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struct regmap *regmap; |
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struct power_supply *supply; |
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struct iio_channel *acin_v; |
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struct iio_channel *acin_i; |
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bool has_acin_path_sel; |
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unsigned int num_irqs; |
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unsigned int irqs[]; |
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}; |
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static irqreturn_t axp20x_ac_power_irq(int irq, void *devid) |
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{ |
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struct axp20x_ac_power *power = devid; |
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power_supply_changed(power->supply); |
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return IRQ_HANDLED; |
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} |
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static int axp20x_ac_power_get_property(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct axp20x_ac_power *power = power_supply_get_drvdata(psy); |
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int ret, reg; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_HEALTH: |
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ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®); |
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if (ret) |
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return ret; |
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if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) { |
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val->intval = POWER_SUPPLY_HEALTH_GOOD; |
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return 0; |
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} |
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val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; |
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return 0; |
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case POWER_SUPPLY_PROP_PRESENT: |
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ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®); |
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if (ret) |
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return ret; |
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val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT); |
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return 0; |
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case POWER_SUPPLY_PROP_ONLINE: |
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ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®); |
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if (ret) |
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return ret; |
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val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL); |
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/* ACIN_PATH_SEL disables ACIN even if ACIN_AVAIL is set. */ |
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if (val->intval && power->has_acin_path_sel) { |
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ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, |
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®); |
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if (ret) |
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return ret; |
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val->intval = !!(reg & AXP813_ACIN_PATH_SEL); |
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} |
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return 0; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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ret = iio_read_channel_processed(power->acin_v, &val->intval); |
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if (ret) |
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return ret; |
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/* IIO framework gives mV but Power Supply framework gives uV */ |
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val->intval *= 1000; |
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return 0; |
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case POWER_SUPPLY_PROP_CURRENT_NOW: |
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ret = iio_read_channel_processed(power->acin_i, &val->intval); |
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if (ret) |
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return ret; |
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/* IIO framework gives mA but Power Supply framework gives uA */ |
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val->intval *= 1000; |
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return 0; |
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case POWER_SUPPLY_PROP_VOLTAGE_MIN: |
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ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®); |
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if (ret) |
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return ret; |
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val->intval = AXP813_VHOLD_REG_TO_UV(reg); |
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return 0; |
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®); |
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if (ret) |
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return ret; |
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val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg); |
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/* AXP813 datasheet defines values 11x as 4000mA */ |
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if (val->intval > 4000000) |
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val->intval = 4000000; |
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return 0; |
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default: |
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return -EINVAL; |
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} |
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return -EINVAL; |
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} |
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static int axp813_ac_power_set_property(struct power_supply *psy, |
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enum power_supply_property psp, |
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const union power_supply_propval *val) |
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{ |
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struct axp20x_ac_power *power = power_supply_get_drvdata(psy); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL, |
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AXP813_ACIN_PATH_SEL, |
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AXP813_ACIN_PATH_SEL_TO_BIT(val->intval)); |
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case POWER_SUPPLY_PROP_VOLTAGE_MIN: |
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if (val->intval < 4000000 || val->intval > 4700000) |
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return -EINVAL; |
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return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL, |
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AXP813_VHOLD_MASK, |
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AXP813_VHOLD_UV_TO_BIT(val->intval)); |
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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if (val->intval < 1500000 || val->intval > 4000000) |
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return -EINVAL; |
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return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL, |
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AXP813_CURR_LIMIT_MASK, |
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AXP813_CURR_LIMIT_UA_TO_BIT(val->intval)); |
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default: |
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return -EINVAL; |
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} |
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return -EINVAL; |
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} |
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static int axp813_ac_power_prop_writeable(struct power_supply *psy, |
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enum power_supply_property psp) |
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{ |
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return psp == POWER_SUPPLY_PROP_ONLINE || |
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psp == POWER_SUPPLY_PROP_VOLTAGE_MIN || |
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psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT; |
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} |
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static enum power_supply_property axp20x_ac_power_properties[] = { |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_CURRENT_NOW, |
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}; |
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static enum power_supply_property axp22x_ac_power_properties[] = { |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_ONLINE, |
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}; |
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static enum power_supply_property axp813_ac_power_properties[] = { |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN, |
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POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, |
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}; |
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static const struct power_supply_desc axp20x_ac_power_desc = { |
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.name = "axp20x-ac", |
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.type = POWER_SUPPLY_TYPE_MAINS, |
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.properties = axp20x_ac_power_properties, |
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.num_properties = ARRAY_SIZE(axp20x_ac_power_properties), |
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.get_property = axp20x_ac_power_get_property, |
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}; |
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static const struct power_supply_desc axp22x_ac_power_desc = { |
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.name = "axp22x-ac", |
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.type = POWER_SUPPLY_TYPE_MAINS, |
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.properties = axp22x_ac_power_properties, |
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.num_properties = ARRAY_SIZE(axp22x_ac_power_properties), |
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.get_property = axp20x_ac_power_get_property, |
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}; |
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static const struct power_supply_desc axp813_ac_power_desc = { |
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.name = "axp813-ac", |
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.type = POWER_SUPPLY_TYPE_MAINS, |
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.properties = axp813_ac_power_properties, |
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.num_properties = ARRAY_SIZE(axp813_ac_power_properties), |
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.property_is_writeable = axp813_ac_power_prop_writeable, |
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.get_property = axp20x_ac_power_get_property, |
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.set_property = axp813_ac_power_set_property, |
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}; |
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static const char * const axp20x_irq_names[] = { |
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"ACIN_PLUGIN", |
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"ACIN_REMOVAL", |
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}; |
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struct axp_data { |
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const struct power_supply_desc *power_desc; |
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const char * const *irq_names; |
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unsigned int num_irq_names; |
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bool acin_adc; |
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bool acin_path_sel; |
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}; |
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static const struct axp_data axp20x_data = { |
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.power_desc = &axp20x_ac_power_desc, |
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.irq_names = axp20x_irq_names, |
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.num_irq_names = ARRAY_SIZE(axp20x_irq_names), |
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.acin_adc = true, |
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.acin_path_sel = false, |
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}; |
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static const struct axp_data axp22x_data = { |
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.power_desc = &axp22x_ac_power_desc, |
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.irq_names = axp20x_irq_names, |
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.num_irq_names = ARRAY_SIZE(axp20x_irq_names), |
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.acin_adc = false, |
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.acin_path_sel = false, |
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}; |
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static const struct axp_data axp813_data = { |
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.power_desc = &axp813_ac_power_desc, |
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.irq_names = axp20x_irq_names, |
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.num_irq_names = ARRAY_SIZE(axp20x_irq_names), |
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.acin_adc = false, |
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.acin_path_sel = true, |
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}; |
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#ifdef CONFIG_PM_SLEEP |
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static int axp20x_ac_power_suspend(struct device *dev) |
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{ |
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struct axp20x_ac_power *power = dev_get_drvdata(dev); |
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int i = 0; |
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/* |
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* Allow wake via ACIN_PLUGIN only. |
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* |
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* As nested threaded IRQs are not automatically disabled during |
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* suspend, we must explicitly disable the remainder of the IRQs. |
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*/ |
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if (device_may_wakeup(&power->supply->dev)) |
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enable_irq_wake(power->irqs[i++]); |
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while (i < power->num_irqs) |
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disable_irq(power->irqs[i++]); |
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return 0; |
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} |
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static int axp20x_ac_power_resume(struct device *dev) |
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{ |
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struct axp20x_ac_power *power = dev_get_drvdata(dev); |
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int i = 0; |
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if (device_may_wakeup(&power->supply->dev)) |
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disable_irq_wake(power->irqs[i++]); |
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while (i < power->num_irqs) |
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enable_irq(power->irqs[i++]); |
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return 0; |
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} |
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#endif |
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static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend, |
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axp20x_ac_power_resume); |
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static int axp20x_ac_power_probe(struct platform_device *pdev) |
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{ |
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struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); |
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struct power_supply_config psy_cfg = {}; |
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struct axp20x_ac_power *power; |
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const struct axp_data *axp_data; |
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int i, irq, ret; |
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if (!of_device_is_available(pdev->dev.of_node)) |
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return -ENODEV; |
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if (!axp20x) { |
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dev_err(&pdev->dev, "Parent drvdata not set\n"); |
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return -EINVAL; |
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} |
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axp_data = of_device_get_match_data(&pdev->dev); |
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power = devm_kzalloc(&pdev->dev, |
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struct_size(power, irqs, axp_data->num_irq_names), |
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GFP_KERNEL); |
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if (!power) |
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return -ENOMEM; |
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if (axp_data->acin_adc) { |
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power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v"); |
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if (IS_ERR(power->acin_v)) { |
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if (PTR_ERR(power->acin_v) == -ENODEV) |
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return -EPROBE_DEFER; |
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return PTR_ERR(power->acin_v); |
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} |
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power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i"); |
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if (IS_ERR(power->acin_i)) { |
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if (PTR_ERR(power->acin_i) == -ENODEV) |
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return -EPROBE_DEFER; |
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return PTR_ERR(power->acin_i); |
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} |
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} |
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power->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
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power->has_acin_path_sel = axp_data->acin_path_sel; |
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power->num_irqs = axp_data->num_irq_names; |
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platform_set_drvdata(pdev, power); |
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psy_cfg.of_node = pdev->dev.of_node; |
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psy_cfg.drv_data = power; |
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power->supply = devm_power_supply_register(&pdev->dev, |
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axp_data->power_desc, |
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&psy_cfg); |
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if (IS_ERR(power->supply)) |
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return PTR_ERR(power->supply); |
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/* Request irqs after registering, as irqs may trigger immediately */ |
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for (i = 0; i < axp_data->num_irq_names; i++) { |
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irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]); |
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if (irq < 0) { |
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dev_err(&pdev->dev, "No IRQ for %s: %d\n", |
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axp_data->irq_names[i], irq); |
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return irq; |
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} |
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power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq); |
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ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i], |
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axp20x_ac_power_irq, 0, |
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DRVNAME, power); |
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if (ret < 0) { |
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dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n", |
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axp_data->irq_names[i], ret); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static const struct of_device_id axp20x_ac_power_match[] = { |
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{ |
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.compatible = "x-powers,axp202-ac-power-supply", |
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.data = &axp20x_data, |
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}, { |
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.compatible = "x-powers,axp221-ac-power-supply", |
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.data = &axp22x_data, |
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}, { |
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.compatible = "x-powers,axp813-ac-power-supply", |
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.data = &axp813_data, |
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}, { /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(of, axp20x_ac_power_match); |
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static struct platform_driver axp20x_ac_power_driver = { |
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.probe = axp20x_ac_power_probe, |
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.driver = { |
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.name = DRVNAME, |
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.of_match_table = axp20x_ac_power_match, |
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.pm = &axp20x_ac_power_pm_ops, |
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}, |
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}; |
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module_platform_driver(axp20x_ac_power_driver); |
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MODULE_AUTHOR("Quentin Schulz <[email protected]>"); |
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MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver"); |
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MODULE_LICENSE("GPL");
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