Adding upstream version 6.7.7.upstream/6.7.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 381 insertions, 0 deletions

diff --git a/drivers/power/supply/pm8916_lbc.c b/drivers/power/supply/pm8916_lbc.c
new file mode 100644
index 0000000000..6d92e98cbe
--- /dev/null
+++ b/drivers/power/supply/pm8916_lbc.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023, Nikita Travkin <nikita@trvn.ru>
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/extcon-provider.h>
+#include <linux/mod_devicetable.h>
+
+/* Two bytes: type + subtype */
+#define PM8916_PERPH_TYPE 0x04
+#define PM8916_LBC_CHGR_TYPE 0x1502
+#define PM8916_LBC_BAT_IF_TYPE 0x1602
+#define PM8916_LBC_USB_TYPE 0x1702
+#define PM8916_LBC_MISC_TYPE 0x1802
+
+#define PM8916_LBC_CHGR_CHG_OPTION 0x08
+#define PM8916_LBC_CHGR_PMIC_CHARGER BIT(7)
+
+#define PM8916_LBC_CHGR_CHG_STATUS 0x09
+
+#define PM8916_INT_RT_STS 0x10
+
+#define PM8916_LBC_USB_USBIN_VALID BIT(1)
+
+#define PM8916_LBC_CHGR_VDD_MAX 0x40
+#define PM8916_LBC_CHGR_VDD_SAFE 0x41
+#define PM8916_LBC_CHGR_IBAT_MAX 0x44
+#define PM8916_LBC_CHGR_IBAT_SAFE 0x45
+
+#define PM8916_LBC_CHGR_TCHG_MAX_EN 0x60
+#define PM8916_LBC_CHGR_TCHG_MAX_ENABLED BIT(7)
+#define PM8916_LBC_CHGR_TCHG_MAX 0x61
+
+#define PM8916_LBC_CHGR_CHG_CTRL 0x49
+#define PM8916_LBC_CHGR_CHG_EN BIT(7)
+#define PM8916_LBC_CHGR_PSTG_EN BIT(5)
+
+#define PM8916_LBC_CHGR_MIN_CURRENT 90000
+#define PM8916_LBC_CHGR_MAX_CURRENT 1440000
+
+#define PM8916_LBC_CHGR_MIN_VOLTAGE 4000000
+#define PM8916_LBC_CHGR_MAX_VOLTAGE 4775000
+#define PM8916_LBC_CHGR_VOLTAGE_STEP 25000
+
+#define PM8916_LBC_CHGR_MIN_TIME 4
+#define PM8916_LBC_CHGR_MAX_TIME 256
+
+struct pm8916_lbc_charger {
+	struct device *dev;
+	struct extcon_dev *edev;
+	struct power_supply *charger;
+	struct power_supply_battery_info *info;
+	struct regmap *regmap;
+	unsigned int reg[4];
+	bool online;
+	unsigned int charge_voltage_max;
+	unsigned int charge_voltage_safe;
+	unsigned int charge_current_max;
+	unsigned int charge_current_safe;
+};
+
+static const unsigned int pm8916_lbc_charger_cable[] = {
+	EXTCON_USB,
+	EXTCON_NONE,
+};
+
+enum {
+	LBC_CHGR = 0,
+	LBC_BAT_IF,
+	LBC_USB,
+	LBC_MISC,
+};
+
+static int pm8916_lbc_charger_configure(struct pm8916_lbc_charger *chg)
+{
+	int ret = 0;
+	unsigned int tmp;
+
+	chg->charge_voltage_max = clamp_t(u32, chg->charge_voltage_max,
+					  PM8916_LBC_CHGR_MIN_VOLTAGE, chg->charge_voltage_safe);
+
+	tmp = chg->charge_voltage_max - PM8916_LBC_CHGR_MIN_VOLTAGE;
+	tmp /= PM8916_LBC_CHGR_VOLTAGE_STEP;
+	chg->charge_voltage_max = PM8916_LBC_CHGR_MIN_VOLTAGE + tmp * PM8916_LBC_CHGR_VOLTAGE_STEP;
+
+	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_VDD_MAX, tmp);
+	if (ret)
+		goto error;
+
+	chg->charge_current_max = min(chg->charge_current_max, chg->charge_current_safe);
+
+	tmp = clamp_t(u32, chg->charge_current_max,
+		      PM8916_LBC_CHGR_MIN_CURRENT, PM8916_LBC_CHGR_MAX_CURRENT);
+
+	tmp = chg->charge_current_max / PM8916_LBC_CHGR_MIN_CURRENT - 1;
+	chg->charge_current_max = (tmp + 1) * PM8916_LBC_CHGR_MIN_CURRENT;
+
+	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_IBAT_MAX, tmp);
+	if (ret)
+		goto error;
+
+	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_CHG_CTRL,
+			   PM8916_LBC_CHGR_CHG_EN | PM8916_LBC_CHGR_PSTG_EN);
+	if (ret)
+		goto error;
+
+	return ret;
+
+error:
+	dev_err(chg->dev, "Failed to configure charging: %pe\n", ERR_PTR(ret));
+	return ret;
+}
+
+static int pm8916_lbc_charger_get_property(struct power_supply *psy,
+					   enum power_supply_property psp,
+					   union power_supply_propval *val)
+{
+	struct pm8916_lbc_charger *chg = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = chg->online;
+		return 0;
+
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		val->intval = chg->charge_voltage_max;
+		return 0;
+
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		val->intval = chg->charge_current_max;
+		return 0;
+
+	default:
+		return -EINVAL;
+	};
+}
+
+static int pm8916_lbc_charger_set_property(struct power_supply *psy,
+					   enum power_supply_property prop,
+					   const union power_supply_propval *val)
+{
+	struct pm8916_lbc_charger *chg = power_supply_get_drvdata(psy);
+
+	switch (prop) {
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		chg->charge_current_max = val->intval;
+		return pm8916_lbc_charger_configure(chg);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int pm8916_lbc_charger_property_is_writeable(struct power_supply *psy,
+						    enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static enum power_supply_property pm8916_lbc_charger_properties[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+};
+
+static irqreturn_t pm8916_lbc_charger_state_changed_irq(int irq, void *data)
+{
+	struct pm8916_lbc_charger *chg = data;
+	unsigned int tmp;
+	int ret;
+
+	ret = regmap_read(chg->regmap, chg->reg[LBC_USB] + PM8916_INT_RT_STS, &tmp);
+	if (ret)
+		return IRQ_HANDLED;
+
+	chg->online = !!(tmp & PM8916_LBC_USB_USBIN_VALID);
+	extcon_set_state_sync(chg->edev, EXTCON_USB, chg->online);
+
+	power_supply_changed(chg->charger);
+
+	return IRQ_HANDLED;
+}
+
+static int pm8916_lbc_charger_probe_dt(struct pm8916_lbc_charger *chg)
+{
+	struct device *dev = chg->dev;
+	int ret = 0;
+	unsigned int tmp;
+
+	ret = device_property_read_u32(dev, "qcom,fast-charge-safe-voltage", &chg->charge_voltage_safe);
+	if (ret)
+		return ret;
+	if (chg->charge_voltage_safe < PM8916_LBC_CHGR_MIN_VOLTAGE)
+		return -EINVAL;
+
+	chg->charge_voltage_safe = clamp_t(u32, chg->charge_voltage_safe,
+					PM8916_LBC_CHGR_MIN_VOLTAGE, PM8916_LBC_CHGR_MAX_VOLTAGE);
+
+	tmp = chg->charge_voltage_safe - PM8916_LBC_CHGR_MIN_VOLTAGE;
+	tmp /= PM8916_LBC_CHGR_VOLTAGE_STEP;
+	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_VDD_SAFE, tmp);
+	if (ret)
+		return ret;
+
+	ret = device_property_read_u32(dev, "qcom,fast-charge-safe-current", &chg->charge_current_safe);
+	if (ret)
+		return ret;
+	if (chg->charge_current_safe < PM8916_LBC_CHGR_MIN_CURRENT)
+		return -EINVAL;
+
+	chg->charge_current_safe = clamp_t(u32, chg->charge_current_safe,
+					PM8916_LBC_CHGR_MIN_CURRENT, PM8916_LBC_CHGR_MAX_CURRENT);
+
+	chg->charge_current_max = chg->charge_current_safe;
+
+	tmp = chg->charge_current_safe / PM8916_LBC_CHGR_MIN_CURRENT - 1;
+	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_IBAT_SAFE, tmp);
+	if (ret)
+		return ret;
+
+	/* Disable charger timeout. */
+	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_TCHG_MAX_EN, 0x00);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static const struct power_supply_desc pm8916_lbc_charger_psy_desc = {
+	.name = "pm8916-lbc-chgr",
+	.type = POWER_SUPPLY_TYPE_USB,
+	.properties = pm8916_lbc_charger_properties,
+	.num_properties = ARRAY_SIZE(pm8916_lbc_charger_properties),
+	.get_property = pm8916_lbc_charger_get_property,
+	.set_property = pm8916_lbc_charger_set_property,
+	.property_is_writeable = pm8916_lbc_charger_property_is_writeable,
+};
+
+static int pm8916_lbc_charger_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct pm8916_lbc_charger *chg;
+	struct power_supply_config psy_cfg = {};
+	int ret, len, irq;
+	unsigned int tmp;
+
+	chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
+	if (!chg)
+		return -ENOMEM;
+
+	chg->dev = dev;
+
+	chg->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!chg->regmap)
+		return -ENODEV;
+
+	len = device_property_count_u32(dev, "reg");
+	if (len < 0)
+		return len;
+	if (len != 4)
+		return dev_err_probe(dev, -EINVAL,
+				     "Wrong amount of reg values: %d (4 expected)\n", len);
+
+	irq = platform_get_irq_byname(pdev, "usb_vbus");
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_threaded_irq(dev, irq, NULL, pm8916_lbc_charger_state_changed_irq,
+					IRQF_ONESHOT, "pm8916_lbc", chg);
+	if (ret)
+		return ret;
+
+	ret = device_property_read_u32_array(dev, "reg", chg->reg, len);
+	if (ret)
+		return ret;
+
+	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_CHGR] + PM8916_PERPH_TYPE, &tmp, 2);
+	if (ret)
+		goto comm_error;
+	if (tmp != PM8916_LBC_CHGR_TYPE)
+		goto type_error;
+
+	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_BAT_IF] + PM8916_PERPH_TYPE, &tmp, 2);
+	if (ret)
+		goto comm_error;
+	if (tmp != PM8916_LBC_BAT_IF_TYPE)
+		goto type_error;
+
+	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_USB] + PM8916_PERPH_TYPE, &tmp, 2);
+	if (ret)
+		goto comm_error;
+	if (tmp != PM8916_LBC_USB_TYPE)
+		goto type_error;
+
+	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_MISC] + PM8916_PERPH_TYPE, &tmp, 2);
+	if (ret)
+		goto comm_error;
+	if (tmp != PM8916_LBC_MISC_TYPE)
+		goto type_error;
+
+	ret = regmap_read(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_CHG_OPTION, &tmp);
+	if (ret)
+		goto comm_error;
+	if (tmp != PM8916_LBC_CHGR_PMIC_CHARGER)
+		dev_err_probe(dev, -ENODEV, "The system is using an external charger\n");
+
+	ret = pm8916_lbc_charger_probe_dt(chg);
+	if (ret)
+		dev_err_probe(dev, ret, "Error while parsing device tree\n");
+
+	psy_cfg.drv_data = chg;
+	psy_cfg.of_node = dev->of_node;
+
+	chg->charger = devm_power_supply_register(dev, &pm8916_lbc_charger_psy_desc, &psy_cfg);
+	if (IS_ERR(chg->charger))
+		return dev_err_probe(dev, PTR_ERR(chg->charger), "Unable to register charger\n");
+
+	ret = power_supply_get_battery_info(chg->charger, &chg->info);
+	if (ret)
+		return dev_err_probe(dev, ret, "Unable to get battery info\n");
+
+	chg->edev = devm_extcon_dev_allocate(dev, pm8916_lbc_charger_cable);
+	if (IS_ERR(chg->edev))
+		return PTR_ERR(chg->edev);
+
+	ret = devm_extcon_dev_register(dev, chg->edev);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "failed to register extcon device\n");
+
+	ret = regmap_read(chg->regmap, chg->reg[LBC_USB] + PM8916_INT_RT_STS, &tmp);
+	if (ret)
+		goto comm_error;
+
+	chg->online = !!(tmp & PM8916_LBC_USB_USBIN_VALID);
+	extcon_set_state_sync(chg->edev, EXTCON_USB, chg->online);
+
+	chg->charge_voltage_max = chg->info->voltage_max_design_uv;
+	ret = pm8916_lbc_charger_configure(chg);
+	if (ret)
+		return ret;
+
+	return 0;
+
+comm_error:
+	return dev_err_probe(dev, ret, "Unable to communicate with device\n");
+
+type_error:
+	return dev_err_probe(dev, -ENODEV, "Device reported wrong type: 0x%X\n", tmp);
+}
+
+static const struct of_device_id pm8916_lbc_charger_of_match[] = {
+	{ .compatible = "qcom,pm8916-lbc", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, pm8916_lbc_charger_of_match);
+
+static struct platform_driver pm8916_lbc_charger_driver = {
+	.driver = {
+		.name = "pm8916-lbc",
+		.of_match_table = pm8916_lbc_charger_of_match,
+	},
+	.probe = pm8916_lbc_charger_probe,
+};
+module_platform_driver(pm8916_lbc_charger_driver);
+
+MODULE_DESCRIPTION("pm8916 LBC driver");
+MODULE_AUTHOR("Nikita Travkin <nikita@trvn.ru>");
+MODULE_LICENSE("GPL");