Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) // max8997_charger.c - Power supply consumer driver for the Maxim 8997/8966
^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) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/power_supply.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/mfd/max8997.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/mfd/max8997-private.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) struct charger_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	struct max8997_dev *iodev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	struct power_supply *battery;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static enum power_supply_property max8997_battery_props[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	POWER_SUPPLY_PROP_STATUS, /* "FULL" or "NOT FULL" only. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) /* Note that the charger control is done by a current regulator "CHARGER" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static int max8997_battery_get_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		enum power_supply_property psp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct charger_data *charger = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct i2c_client *i2c = charger->iodev->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	u8 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	case POWER_SUPPLY_PROP_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		val->intval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		if ((reg & (1 << 0)) == 0x1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 			val->intval = POWER_SUPPLY_STATUS_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	case POWER_SUPPLY_PROP_PRESENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		val->intval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		if ((reg & (1 << 2)) == 0x0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 			val->intval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	case POWER_SUPPLY_PROP_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		val->intval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		/* DCINOK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		if (reg & (1 << 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			val->intval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		return -EINVAL;
^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) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static const struct power_supply_desc max8997_battery_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	.name		= "max8997_pmic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	.type		= POWER_SUPPLY_TYPE_BATTERY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	.get_property	= max8997_battery_get_property,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	.properties	= max8997_battery_props,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	.num_properties	= ARRAY_SIZE(max8997_battery_props),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static int max8997_battery_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	struct charger_data *charger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	struct power_supply_config psy_cfg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (!pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (pdata->eoc_mA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		int val = (pdata->eoc_mA - 50) / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		if (val < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		if (val > 0xf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			val = 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		ret = max8997_update_reg(iodev->i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 				MAX8997_REG_MBCCTRL5, val, 0xf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			dev_err(&pdev->dev, "Cannot use i2c bus.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	switch (pdata->timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	case 5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				0x2 << 4, 0x7 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 				0x3 << 4, 0x7 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	case 7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 				0x4 << 4, 0x7 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 				0x7 << 4, 0x7 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		dev_err(&pdev->dev, "incorrect timeout value (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 				pdata->timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		dev_err(&pdev->dev, "Cannot use i2c bus.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (!charger)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	platform_set_drvdata(pdev, charger);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	charger->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	charger->iodev = iodev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	psy_cfg.drv_data = charger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	charger->battery = devm_power_supply_register(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 						 &max8997_battery_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 						 &psy_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (IS_ERR(charger->battery)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		dev_err(&pdev->dev, "failed: power supply register\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		return PTR_ERR(charger->battery);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static const struct platform_device_id max8997_battery_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	{ "max8997-battery", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) MODULE_DEVICE_TABLE(platform, max8997_battery_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static struct platform_driver max8997_battery_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		.name = "max8997-battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	.probe = max8997_battery_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	.id_table = max8997_battery_id,
^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 int __init max8997_battery_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	return platform_driver_register(&max8997_battery_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) subsys_initcall(max8997_battery_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static void __exit max8997_battery_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	platform_driver_unregister(&max8997_battery_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) module_exit(max8997_battery_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) MODULE_DESCRIPTION("MAXIM 8997/8966 battery control driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) MODULE_LICENSE("GPL");