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) // max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) //  Copyright (C) 2009-2010 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/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/power_supply.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/mfd/max8998.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/mfd/max8998-private.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) struct max8998_battery_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	struct max8998_dev *iodev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	struct power_supply *battery;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static enum power_supply_property max8998_battery_props[] = {
^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) 	POWER_SUPPLY_PROP_STATUS, /* charger is charging/discharging/full */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) /* Note that the charger control is done by a current regulator "CHARGER" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) static int max8998_battery_get_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		enum power_supply_property psp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct max8998_battery_data *max8998 = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct i2c_client *i2c = max8998->iodev->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	u8 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	case POWER_SUPPLY_PROP_PRESENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &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 << 4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 			val->intval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 			val->intval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	case POWER_SUPPLY_PROP_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		if (reg & (1 << 5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 			val->intval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 			val->intval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	case POWER_SUPPLY_PROP_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		if (!(reg & (1 << 5))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			if (reg & (1 << 6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 				val->intval = POWER_SUPPLY_STATUS_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			else if (reg & (1 << 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 				val->intval = POWER_SUPPLY_STATUS_CHARGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) static const struct power_supply_desc max8998_battery_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	.name		= "max8998_pmic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	.type		= POWER_SUPPLY_TYPE_BATTERY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	.get_property	= max8998_battery_get_property,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	.properties	= max8998_battery_props,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	.num_properties	= ARRAY_SIZE(max8998_battery_props),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static int max8998_battery_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	struct max8998_platform_data *pdata = iodev->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct power_supply_config psy_cfg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct max8998_battery_data *max8998;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct i2c_client *i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		dev_err(pdev->dev.parent, "No platform init data supplied\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 				GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (!max8998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	max8998->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	max8998->iodev = iodev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	platform_set_drvdata(pdev, max8998);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	i2c = max8998->iodev->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* Setup "End of Charge" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	/* If EOC value equals 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	 * remain value set from bootloader or default value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (pdata->eoc >= 10 && pdata->eoc <= 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		max8998_update_reg(i2c, MAX8998_REG_CHGR1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 				(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	} else if (pdata->eoc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		dev_dbg(max8998->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			"EOC value not set: leave it unchanged.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		dev_err(max8998->dev, "Invalid EOC value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	/* Setup Charge Restart Level */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	switch (pdata->restart) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	case 100:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	case 150:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	case 200:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	case -1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		dev_dbg(max8998->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			"Restart Level not set: leave it unchanged.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		dev_err(max8998->dev, "Invalid Restart Level\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	/* Setup Charge Full Timeout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	switch (pdata->timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	case 5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	case 7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	case -1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		dev_dbg(max8998->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			"Full Timeout not set: leave it unchanged.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		dev_err(max8998->dev, "Invalid Full Timeout value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	psy_cfg.drv_data = max8998;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	max8998->battery = devm_power_supply_register(max8998->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 						      &max8998_battery_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 						      &psy_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (IS_ERR(max8998->battery)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		ret = PTR_ERR(max8998->battery);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		dev_err(max8998->dev, "failed: power supply register: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static const struct platform_device_id max8998_battery_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	{ "max8998-battery", TYPE_MAX8998 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static struct platform_driver max8998_battery_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		.name = "max8998-battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	.probe = max8998_battery_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	.id_table = max8998_battery_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) module_platform_driver(max8998_battery_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) MODULE_ALIAS("platform:max8998-battery");