^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2011 Samsung Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * MyungJoo Ham <myungjoo.ham@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/power_supply.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/power/max8903_charger.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct max8903_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct max8903_pdata *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct power_supply *psy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct power_supply_desc psy_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) bool fault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) bool usb_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) bool ta_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static enum power_supply_property max8903_charger_props[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) POWER_SUPPLY_PROP_STATUS, /* Charger status output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) POWER_SUPPLY_PROP_ONLINE, /* External power source */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int max8903_get_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) enum power_supply_property psp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct max8903_data *data = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case POWER_SUPPLY_PROP_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (gpio_is_valid(data->pdata->chg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (gpio_get_value(data->pdata->chg) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) val->intval = POWER_SUPPLY_STATUS_CHARGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) else if (data->usb_in || data->ta_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) case POWER_SUPPLY_PROP_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) val->intval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (data->usb_in || data->ta_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) val->intval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) case POWER_SUPPLY_PROP_HEALTH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) val->intval = POWER_SUPPLY_HEALTH_GOOD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (data->fault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static irqreturn_t max8903_dcin(int irq, void *_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct max8903_data *data = _data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct max8903_pdata *pdata = data->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) bool ta_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) enum power_supply_type old_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ta_in = gpio_get_value(pdata->dok) ? false : true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ta_in == data->ta_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) data->ta_in = ta_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* Set Current-Limit-Mode 1:DC 0:USB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (gpio_is_valid(pdata->dcm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) gpio_set_value(pdata->dcm, ta_in ? 1 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /* Charger Enable / Disable (cen is negated) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (gpio_is_valid(pdata->cen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) gpio_set_value(pdata->cen, ta_in ? 0 :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) (data->usb_in ? 0 : 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) "Connected" : "Disconnected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) old_type = data->psy_desc.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (data->ta_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) else if (data->usb_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (old_type != data->psy_desc.type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) power_supply_changed(data->psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static irqreturn_t max8903_usbin(int irq, void *_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct max8903_data *data = _data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct max8903_pdata *pdata = data->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) bool usb_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) enum power_supply_type old_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) usb_in = gpio_get_value(pdata->uok) ? false : true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (usb_in == data->usb_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) data->usb_in = usb_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* Do not touch Current-Limit-Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* Charger Enable / Disable (cen is negated) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (gpio_is_valid(pdata->cen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) gpio_set_value(pdata->cen, usb_in ? 0 :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) (data->ta_in ? 0 : 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dev_dbg(data->dev, "USB Charger %s.\n", usb_in ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) "Connected" : "Disconnected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) old_type = data->psy_desc.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (data->ta_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) else if (data->usb_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (old_type != data->psy_desc.type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) power_supply_changed(data->psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static irqreturn_t max8903_fault(int irq, void *_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct max8903_data *data = _data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct max8903_pdata *pdata = data->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) bool fault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) fault = gpio_get_value(pdata->flt) ? false : true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (fault == data->fault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) data->fault = fault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (fault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) dev_err(data->dev, "Charger suffers a fault and stops.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) dev_err(data->dev, "Charger recovered from a fault.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static struct max8903_pdata *max8903_parse_dt_data(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct max8903_pdata *pdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (!pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) pdata->dc_valid = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) pdata->usb_valid = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) pdata->cen = of_get_named_gpio(np, "cen-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (!gpio_is_valid(pdata->cen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) pdata->cen = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) pdata->chg = of_get_named_gpio(np, "chg-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (!gpio_is_valid(pdata->chg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) pdata->chg = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) pdata->flt = of_get_named_gpio(np, "flt-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (!gpio_is_valid(pdata->flt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) pdata->flt = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) pdata->usus = of_get_named_gpio(np, "usus-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (!gpio_is_valid(pdata->usus))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) pdata->usus = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) pdata->dcm = of_get_named_gpio(np, "dcm-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (!gpio_is_valid(pdata->dcm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) pdata->dcm = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) pdata->dok = of_get_named_gpio(np, "dok-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!gpio_is_valid(pdata->dok))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) pdata->dok = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) pdata->dc_valid = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) pdata->uok = of_get_named_gpio(np, "uok-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (!gpio_is_valid(pdata->uok))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) pdata->uok = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) pdata->usb_valid = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static int max8903_setup_gpios(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct max8903_data *data = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct max8903_pdata *pdata = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) int gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int ta_in = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) int usb_in = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (pdata->dc_valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (gpio_is_valid(pdata->dok)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) ret = devm_gpio_request(dev, pdata->dok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) "Failed GPIO request for dok: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) pdata->dok, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) gpio = pdata->dok; /* PULL_UPed Interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ta_in = gpio_get_value(gpio) ? 0 : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) dev_err(dev, "When DC is wired, DOK should be wired as well.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (gpio_is_valid(pdata->dcm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ret = devm_gpio_request(dev, pdata->dcm, data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) "Failed GPIO request for dcm: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) pdata->dcm, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) gpio = pdata->dcm; /* Output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) gpio_set_value(gpio, ta_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (pdata->usb_valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (gpio_is_valid(pdata->uok)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) ret = devm_gpio_request(dev, pdata->uok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) "Failed GPIO request for uok: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) pdata->uok, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) gpio = pdata->uok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) usb_in = gpio_get_value(gpio) ? 0 : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) dev_err(dev, "When USB is wired, UOK should be wired."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) "as well.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (gpio_is_valid(pdata->cen)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) ret = devm_gpio_request(dev, pdata->cen, data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) "Failed GPIO request for cen: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) pdata->cen, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) gpio_set_value(pdata->cen, (ta_in || usb_in) ? 0 : 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (gpio_is_valid(pdata->chg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) ret = devm_gpio_request(dev, pdata->chg, data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) "Failed GPIO request for chg: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) pdata->chg, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (gpio_is_valid(pdata->flt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) ret = devm_gpio_request(dev, pdata->flt, data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) "Failed GPIO request for flt: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) pdata->flt, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (gpio_is_valid(pdata->usus)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) ret = devm_gpio_request(dev, pdata->usus, data->psy_desc.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) "Failed GPIO request for usus: %d err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) pdata->usus, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) data->fault = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) data->ta_in = ta_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) data->usb_in = usb_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static int max8903_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) struct max8903_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) struct max8903_pdata *pdata = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct power_supply_config psy_cfg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (IS_ENABLED(CONFIG_OF) && !pdata && dev->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) pdata = max8903_parse_dt_data(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) dev_err(dev, "No platform data.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) pdev->dev.platform_data = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) data->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) data->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) platform_set_drvdata(pdev, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (pdata->dc_valid == false && pdata->usb_valid == false) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) dev_err(dev, "No valid power sources.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) ret = max8903_setup_gpios(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) data->psy_desc.name = "max8903_charger";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) data->psy_desc.type = (data->ta_in) ? POWER_SUPPLY_TYPE_MAINS :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) ((data->usb_in) ? POWER_SUPPLY_TYPE_USB :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) POWER_SUPPLY_TYPE_BATTERY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) data->psy_desc.get_property = max8903_get_property;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) data->psy_desc.properties = max8903_charger_props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) data->psy_desc.num_properties = ARRAY_SIZE(max8903_charger_props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) psy_cfg.of_node = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) psy_cfg.drv_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) data->psy = devm_power_supply_register(dev, &data->psy_desc, &psy_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (IS_ERR(data->psy)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) dev_err(dev, "failed: power supply register.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return PTR_ERR(data->psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (pdata->dc_valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ret = devm_request_threaded_irq(dev, gpio_to_irq(pdata->dok),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) NULL, max8903_dcin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) IRQF_TRIGGER_FALLING |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) IRQF_TRIGGER_RISING | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) "MAX8903 DC IN", data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) dev_err(dev, "Cannot request irq %d for DC (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) gpio_to_irq(pdata->dok), ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (pdata->usb_valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) ret = devm_request_threaded_irq(dev, gpio_to_irq(pdata->uok),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) NULL, max8903_usbin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) IRQF_TRIGGER_FALLING |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) IRQF_TRIGGER_RISING | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) "MAX8903 USB IN", data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) dev_err(dev, "Cannot request irq %d for USB (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) gpio_to_irq(pdata->uok), ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (gpio_is_valid(pdata->flt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) ret = devm_request_threaded_irq(dev, gpio_to_irq(pdata->flt),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) NULL, max8903_fault,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) IRQF_TRIGGER_FALLING |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) IRQF_TRIGGER_RISING | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) "MAX8903 Fault", data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) dev_err(dev, "Cannot request irq %d for Fault (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) gpio_to_irq(pdata->flt), ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static const struct of_device_id max8903_match_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) { .compatible = "maxim,max8903", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) MODULE_DEVICE_TABLE(of, max8903_match_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static struct platform_driver max8903_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) .probe = max8903_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) .name = "max8903-charger",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) .of_match_table = max8903_match_ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) module_platform_driver(max8903_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) MODULE_DESCRIPTION("MAX8903 Charger Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) MODULE_ALIAS("platform:max8903-charger");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags