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Release 4.11 drivers/power/supply/axp20x_usb_power.c

/*
 * AXP20x PMIC USB power supply status driver
 *
 * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
 * Copyright (C) 2014 Bruno Prémont <bonbons@linux-vserver.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>


#define DRVNAME "axp20x-usb-power-supply"


#define AXP20X_PWR_STATUS_VBUS_PRESENT	BIT(5)

#define AXP20X_PWR_STATUS_VBUS_USED	BIT(4)


#define AXP20X_USB_STATUS_VBUS_VALID	BIT(2)


#define AXP20X_VBUS_VHOLD_uV(b)		(4000000 + (((b) >> 3) & 7) * 100000)

#define AXP20X_VBUS_VHOLD_MASK		GENMASK(5, 3)

#define AXP20X_VBUS_VHOLD_OFFSET	3

#define AXP20X_VBUS_CLIMIT_MASK		3

#define AXP20X_VBUC_CLIMIT_900mA	0

#define AXP20X_VBUC_CLIMIT_500mA	1

#define AXP20X_VBUC_CLIMIT_100mA	2

#define AXP20X_VBUC_CLIMIT_NONE		3


#define AXP20X_ADC_EN1_VBUS_CURR	BIT(2)

#define AXP20X_ADC_EN1_VBUS_VOLT	BIT(3)


#define AXP20X_VBUS_MON_VBUS_VALID	BIT(3)


struct axp20x_usb_power {
	
struct device_node *np;
	
struct regmap *regmap;
	
struct power_supply *supply;
	
enum axp20x_variants axp20x_id;
	
struct iio_channel *vbus_v;
	
struct iio_channel *vbus_i;
};


static irqreturn_t axp20x_usb_power_irq(int irq, void *devid) { struct axp20x_usb_power *power = devid; power_supply_changed(power->supply); return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Hans de Goede30100.00%1100.00%
Total30100.00%1100.00%


static int axp20x_usb_power_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct axp20x_usb_power *power = power_supply_get_drvdata(psy); unsigned int input, v; int ret; switch (psp) { case POWER_SUPPLY_PROP_VOLTAGE_MIN: ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v); if (ret) return ret; val->intval = AXP20X_VBUS_VHOLD_uV(v); return 0; case POWER_SUPPLY_PROP_VOLTAGE_NOW: if (IS_ENABLED(CONFIG_AXP20X_ADC)) { ret = iio_read_channel_processed(power->vbus_v, &val->intval); if (ret) return ret; /* * IIO framework gives mV but Power Supply framework * gives uV. */ val->intval *= 1000; return 0; } ret = axp20x_read_variable_width(power->regmap, AXP20X_VBUS_V_ADC_H, 12); if (ret < 0) return ret; val->intval = ret * 1700; /* 1 step = 1.7 mV */ return 0; case POWER_SUPPLY_PROP_CURRENT_MAX: ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v); if (ret) return ret; switch (v & AXP20X_VBUS_CLIMIT_MASK) { case AXP20X_VBUC_CLIMIT_100mA: if (power->axp20x_id == AXP221_ID) val->intval = -1; /* No 100mA limit */ else val->intval = 100000; break; case AXP20X_VBUC_CLIMIT_500mA: val->intval = 500000; break; case AXP20X_VBUC_CLIMIT_900mA: val->intval = 900000; break; case AXP20X_VBUC_CLIMIT_NONE: val->intval = -1; break; } return 0; case POWER_SUPPLY_PROP_CURRENT_NOW: if (IS_ENABLED(CONFIG_AXP20X_ADC)) { ret = iio_read_channel_processed(power->vbus_i, &val->intval); if (ret) return ret; /* * IIO framework gives mA but Power Supply framework * gives uA. */ val->intval *= 1000; return 0; } ret = axp20x_read_variable_width(power->regmap, AXP20X_VBUS_I_ADC_H, 12); if (ret < 0) return ret; val->intval = ret * 375; /* 1 step = 0.375 mA */ return 0; default: break; } /* All the properties below need the input-status reg value */ ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &input); if (ret) return ret; switch (psp) { case POWER_SUPPLY_PROP_HEALTH: if (!(input & AXP20X_PWR_STATUS_VBUS_PRESENT)) { val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; break; } val->intval = POWER_SUPPLY_HEALTH_GOOD; if (power->axp20x_id == AXP202_ID) { ret = regmap_read(power->regmap, AXP20X_USB_OTG_STATUS, &v); if (ret) return ret; if (!(v & AXP20X_USB_STATUS_VBUS_VALID)) val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; } break; case POWER_SUPPLY_PROP_PRESENT: val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_PRESENT); break; case POWER_SUPPLY_PROP_ONLINE: val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_USED); break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hans de Goede38280.93%240.00%
Quentin Schulz9019.07%360.00%
Total472100.00%5100.00%


static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power, int intval) { int val; switch (intval) { case 4000000: case 4100000: case 4200000: case 4300000: case 4400000: case 4500000: case 4600000: case 4700000: val = (intval - 4000000) / 100000; return regmap_update_bits(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, AXP20X_VBUS_VHOLD_MASK, val << AXP20X_VBUS_VHOLD_OFFSET); default: return -EINVAL; } return -EINVAL; }

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Quentin Schulz82100.00%1100.00%
Total82100.00%1100.00%


static int axp20x_usb_power_set_current_max(struct axp20x_usb_power *power, int intval) { int val; switch (intval) { case 100000: if (power->axp20x_id == AXP221_ID) return -EINVAL; case 500000: case 900000: val = (900000 - intval) / 400000; return regmap_update_bits(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, AXP20X_VBUS_CLIMIT_MASK, val); default: return -EINVAL; } return -EINVAL; }

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Quentin Schulz77100.00%1100.00%
Total77100.00%1100.00%


static int axp20x_usb_power_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct axp20x_usb_power *power = power_supply_get_drvdata(psy); switch (psp) { case POWER_SUPPLY_PROP_VOLTAGE_MIN: return axp20x_usb_power_set_voltage_min(power, val->intval); case POWER_SUPPLY_PROP_CURRENT_MAX: return axp20x_usb_power_set_current_max(power, val->intval); default: return -EINVAL; } return -EINVAL; }

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Quentin Schulz72100.00%1100.00%
Total72100.00%1100.00%


static int axp20x_usb_power_prop_writeable(struct power_supply *psy, enum power_supply_property psp) { return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN || psp == POWER_SUPPLY_PROP_CURRENT_MAX; }

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Quentin Schulz24100.00%1100.00%
Total24100.00%1100.00%

static enum power_supply_property axp20x_usb_power_properties[] = { POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_VOLTAGE_MIN, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_MAX, POWER_SUPPLY_PROP_CURRENT_NOW, }; static enum power_supply_property axp22x_usb_power_properties[] = { POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_VOLTAGE_MIN, POWER_SUPPLY_PROP_CURRENT_MAX, }; static const struct power_supply_desc axp20x_usb_power_desc = { .name = "axp20x-usb", .type = POWER_SUPPLY_TYPE_USB, .properties = axp20x_usb_power_properties, .num_properties = ARRAY_SIZE(axp20x_usb_power_properties), .property_is_writeable = axp20x_usb_power_prop_writeable, .get_property = axp20x_usb_power_get_property, .set_property = axp20x_usb_power_set_property, }; static const struct power_supply_desc axp22x_usb_power_desc = { .name = "axp20x-usb", .type = POWER_SUPPLY_TYPE_USB, .properties = axp22x_usb_power_properties, .num_properties = ARRAY_SIZE(axp22x_usb_power_properties), .property_is_writeable = axp20x_usb_power_prop_writeable, .get_property = axp20x_usb_power_get_property, .set_property = axp20x_usb_power_set_property, };
static int configure_iio_channels(struct platform_device *pdev, struct axp20x_usb_power *power) { power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v"); if (IS_ERR(power->vbus_v)) { if (PTR_ERR(power->vbus_v) == -ENODEV) return -EPROBE_DEFER; return PTR_ERR(power->vbus_v); } power->vbus_i = devm_iio_channel_get(&pdev->dev, "vbus_i"); if (IS_ERR(power->vbus_i)) { if (PTR_ERR(power->vbus_i) == -ENODEV) return -EPROBE_DEFER; return PTR_ERR(power->vbus_i); } return 0; }

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Quentin Schulz117100.00%1100.00%
Total117100.00%1100.00%


static int configure_adc_registers(struct axp20x_usb_power *power) { /* Enable vbus voltage and current measurement */ return regmap_update_bits(power->regmap, AXP20X_ADC_EN1, AXP20X_ADC_EN1_VBUS_CURR | AXP20X_ADC_EN1_VBUS_VOLT, AXP20X_ADC_EN1_VBUS_CURR | AXP20X_ADC_EN1_VBUS_VOLT); }

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PersonTokensPropCommitsCommitProp
Quentin Schulz30100.00%1100.00%
Total30100.00%1100.00%


static int axp20x_usb_power_probe(struct platform_device *pdev) { struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); struct power_supply_config psy_cfg = {}; struct axp20x_usb_power *power; static const char * const axp20x_irq_names[] = { "VBUS_PLUGIN", "VBUS_REMOVAL", "VBUS_VALID", "VBUS_NOT_VALID", NULL }; static const char * const axp22x_irq_names[] = { "VBUS_PLUGIN", "VBUS_REMOVAL", NULL }; static const char * const *irq_names; const struct power_supply_desc *usb_power_desc; int i, irq, ret; if (!of_device_is_available(pdev->dev.of_node)) return -ENODEV; if (!axp20x) { dev_err(&pdev->dev, "Parent drvdata not set\n"); return -EINVAL; } power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL); if (!power) return -ENOMEM; power->axp20x_id = (enum axp20x_variants)of_device_get_match_data( &pdev->dev); power->np = pdev->dev.of_node; power->regmap = axp20x->regmap; if (power->axp20x_id == AXP202_ID) { /* Enable vbus valid checking */ ret = regmap_update_bits(power->regmap, AXP20X_VBUS_MON, AXP20X_VBUS_MON_VBUS_VALID, AXP20X_VBUS_MON_VBUS_VALID); if (ret) return ret; if (IS_ENABLED(CONFIG_AXP20X_ADC)) ret = configure_iio_channels(pdev, power); else ret = configure_adc_registers(power); if (ret) return ret; usb_power_desc = &axp20x_usb_power_desc; irq_names = axp20x_irq_names; } else if (power->axp20x_id == AXP221_ID || power->axp20x_id == AXP223_ID) { usb_power_desc = &axp22x_usb_power_desc; irq_names = axp22x_irq_names; } else { dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n", axp20x->variant); return -EINVAL; } psy_cfg.of_node = pdev->dev.of_node; psy_cfg.drv_data = power; power->supply = devm_power_supply_register(&pdev->dev, usb_power_desc, &psy_cfg); if (IS_ERR(power->supply)) return PTR_ERR(power->supply); /* Request irqs after registering, as irqs may trigger immediately */ for (i = 0; irq_names[i]; i++) { irq = platform_get_irq_byname(pdev, irq_names[i]); if (irq < 0) { dev_warn(&pdev->dev, "No IRQ for %s: %d\n", irq_names[i], irq); continue; } irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq); ret = devm_request_any_context_irq(&pdev->dev, irq, axp20x_usb_power_irq, 0, DRVNAME, power); if (ret < 0) dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n", irq_names[i], ret); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hans de Goede42790.27%233.33%
Quentin Schulz449.30%350.00%
Michal Suchanek20.42%116.67%
Total473100.00%6100.00%

static const struct of_device_id axp20x_usb_power_match[] = { { .compatible = "x-powers,axp202-usb-power-supply", .data = (void *)AXP202_ID, }, { .compatible = "x-powers,axp221-usb-power-supply", .data = (void *)AXP221_ID, }, { .compatible = "x-powers,axp223-usb-power-supply", .data = (void *)AXP223_ID, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, axp20x_usb_power_match); static struct platform_driver axp20x_usb_power_driver = { .probe = axp20x_usb_power_probe, .driver = { .name = DRVNAME, .of_match_table = axp20x_usb_power_match, }, }; module_platform_driver(axp20x_usb_power_driver); MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); MODULE_DESCRIPTION("AXP20x PMIC USB power supply status driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Hans de Goede113664.51%228.57%
Quentin Schulz62135.26%457.14%
Michal Suchanek40.23%114.29%
Total1761100.00%7100.00%
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