[4/9] power: supply: photonicat-supply: Add Photonicat PMU battery and charger

Message ID	20240906093630.2428329-5-bigfoot@classfun.cn (mailing list archive)
State	Handled Elsewhere, archived
Headers	show Received: from classfun.cn (unknown [129.204.178.38]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C78AC1C86EF; Fri, 6 Sep 2024 09:38:04 +0000 (UTC) sender: bigfoot) by classfun.cn (Postfix) with ESMTPSA id B3C5D78A02; Fri, 6 Sep 2024 17:38:02 +0800 (CST) From: Junhao Xie <bigfoot@classfun.cn> To: devicetree@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Cc: Jean Delvare <jdelvare@suse.com>, Guenter Roeck <linux@roeck-us.net>, Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>, Conor Dooley <conor+dt@kernel.org>, Pavel Machek <pavel@ucw.cz>, Lee Jones <lee@kernel.org>, Sebastian Reichel <sre@kernel.org>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Wim Van Sebroeck <wim@linux-watchdog.org>, Heiko Stuebner <heiko@sntech.de>, Chukun Pan <amadeus@jmu.edu.cn>, Junhao Xie <bigfoot@classfun.cn> Subject: [PATCH 4/9] power: supply: photonicat-supply: Add Photonicat PMU battery and charger Date: Fri, 6 Sep 2024 17:36:25 +0800 Message-ID: <20240906093630.2428329-5-bigfoot@classfun.cn> In-Reply-To: <20240906093630.2428329-1-bigfoot@classfun.cn> References: <20240906093630.2428329-1-bigfoot@classfun.cn> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Introduce Photonicat power management MCU driver \| expand [0/9] Introduce Photonicat power management MCU driver [1/9] mfd: Add driver for Photonicat power management MCU [2/9] power: reset: add Photonicat PMU poweroff driver [3/9] watchdog: Add Photonicat PMU watchdog driver [4/9] power: supply: photonicat-supply: Add Photonicat PMU battery and charger [5/9] rtc: Add Photonicat PMU real-time clock [6/9] hwmon: Add support for Photonicat PMU board temperature sensor [7/9] leds: add Photonicat PMU LED driver [8/9] dt-bindings: Add documentation for Photonicat PMU [9/9] arm64: dts: rockchip: add Photonicat PMU support for Ariaboard Photonicat

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index bcfa63fb9f1e..4d2fcf568810 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -455,6 +455,18 @@ config CHARGER_PCF50633 help Say Y to include support for NXP PCF50633 Main Battery Charger. +config PHOTONICAT_POWER + tristate "Photonicat PMU power supply driver" + depends on MFD_PHOTONICAT_PMU + help + Photonicat PMU supports battery and charger power supply. + The MCU only provides voltage meter. + + Say Y here to enable support for Photonicat PMU power supply. + + This driver can also be built as a module. If so, the module will be + called photonicat-supply. + config BATTERY_RX51 tristate "Nokia RX-51 (N900) battery driver" depends on TWL4030_MADC diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 8dcb41545317..81ada9bb6438 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -63,6 +63,7 @@ obj-$(CONFIG_CHARGER_RT9471) += rt9471.o obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o +obj-$(CONFIG_PHOTONICAT_POWER) += photonicat-supply.o obj-$(CONFIG_BATTERY_RX51) += rx51_battery.o obj-$(CONFIG_AB8500_BM) += ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o ab8500_chargalg.o obj-$(CONFIG_CHARGER_CPCAP) += cpcap-charger.o diff --git a/drivers/power/supply/photonicat-supply.c b/drivers/power/supply/photonicat-supply.c new file mode 100644 index 000000000000..e6861a3904fe --- /dev/null +++ b/drivers/power/supply/photonicat-supply.c @@ -0,0 +1,250 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Junhao Xie <bigfoot@classfun.cn> + */ + +#include <linux/module.h> +#include <linux/mfd/photonicat-pmu.h> +#include <linux/notifier.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> + +enum pcat_supply_type { + PCAT_SUPPLY_BATTERY, + PCAT_SUPPLY_CHARGER, +}; + +struct pcat_supply { + struct device *dev; + struct pcat_pmu *pmu; + struct notifier_block nb; + struct power_supply *psy; + struct power_supply_desc desc; + struct power_supply_battery_info *bat_info; + enum pcat_supply_type type; + u16 supply_microvolt; + struct completion initial_report; +}; + +static int pcat_pmu_get_capacity(struct pcat_supply *supply) +{ + int uv; + + if (supply->type != PCAT_SUPPLY_BATTERY) + return 0; + uv = supply->supply_microvolt * 1000; + + return power_supply_batinfo_ocv2cap(supply->bat_info, uv, 20); +} + +static int pcat_pmu_get_energy(struct pcat_supply *supply) +{ + int capacity; + + if (supply->type != PCAT_SUPPLY_BATTERY) + return 0; + capacity = pcat_pmu_get_capacity(supply); + if (capacity < 0) + return 0; + + return supply->bat_info->energy_full_design_uwh / 100 * capacity; +} + +static int pcat_pmu_get_status(struct pcat_supply *supply) +{ + if (supply->type != PCAT_SUPPLY_BATTERY) + return 0; + + if (pcat_pmu_get_capacity(supply) < 100) { + if (power_supply_am_i_supplied(supply->psy)) + return POWER_SUPPLY_STATUS_CHARGING; + else + return POWER_SUPPLY_STATUS_DISCHARGING; + } + + return POWER_SUPPLY_STATUS_FULL; +} + +static int pcat_pmu_get_supply_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct pcat_supply *supply = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = pcat_pmu_get_capacity(supply); + break; + case POWER_SUPPLY_PROP_ONLINE: + val->intval = supply->supply_microvolt > 1000; + break; + case POWER_SUPPLY_PROP_ENERGY_FULL: + val->intval = supply->bat_info->energy_full_design_uwh; + break; + case POWER_SUPPLY_PROP_ENERGY_NOW: + val->intval = pcat_pmu_get_energy(supply); + break; + case POWER_SUPPLY_PROP_STATUS: + val->intval = pcat_pmu_get_status(supply); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + val->intval = supply->bat_info->voltage_max_design_uv; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN: + val->intval = supply->bat_info->voltage_min_design_uv; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = supply->supply_microvolt * 1000; + break; + default: + return -EINVAL; + } + return 0; +} + +static enum power_supply_property pcat_charger_props[] = { + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_ONLINE, +}; + +static enum power_supply_property pcat_battery_props[] = { + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_ENERGY_FULL, + POWER_SUPPLY_PROP_ENERGY_NOW, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_VOLTAGE_MIN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, +}; + +static int pcat_supply_notify(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct pcat_supply *supply = container_of(nb, struct pcat_supply, nb); + struct pcat_data_cmd_status *status = pcat_data_get_data(data); + + if (action != PCAT_CMD_STATUS_REPORT) + return NOTIFY_DONE; + + switch (supply->type) { + case PCAT_SUPPLY_BATTERY: + supply->supply_microvolt = status->battery_microvolt; + break; + case PCAT_SUPPLY_CHARGER: + supply->supply_microvolt = status->charger_microvolt; + break; + } + + complete(&supply->initial_report); + + return NOTIFY_DONE; +} + +static int pcat_supply_probe(struct platform_device *pdev) +{ + int ret; + const char *label; + const char *supply_type; + struct device *dev = &pdev->dev; + struct pcat_supply *supply; + struct power_supply_config psy_cfg = {}; + + supply = devm_kzalloc(dev, sizeof(*supply), GFP_KERNEL); + if (!supply) + return -ENOMEM; + + supply->dev = dev; + supply->pmu = dev_get_drvdata(dev->parent); + supply->nb.notifier_call = pcat_supply_notify; + init_completion(&supply->initial_report); + psy_cfg.drv_data = supply; + psy_cfg.of_node = dev->of_node; + platform_set_drvdata(pdev, supply); + + ret = of_property_read_string(dev->of_node, "type", &supply_type); + if (ret) + return dev_err_probe(dev, ret, "No supply type property\n"); + + ret = of_property_read_string(dev->of_node, "label", &label); + if (ret) + return dev_err_probe(dev, ret, "No label property\n"); + + if (!strcmp(supply_type, "battery")) { + supply->type = PCAT_SUPPLY_BATTERY; + supply->desc.type = POWER_SUPPLY_TYPE_BATTERY; + supply->desc.properties = pcat_battery_props; + supply->desc.num_properties = ARRAY_SIZE(pcat_battery_props); + } else if (!strcmp(supply_type, "charger")) { + supply->type = PCAT_SUPPLY_CHARGER; + supply->desc.type = POWER_SUPPLY_TYPE_MAINS; + supply->desc.properties = pcat_charger_props; + supply->desc.num_properties = ARRAY_SIZE(pcat_charger_props); + } else + return dev_err_probe(dev, -EINVAL, "Unknown supply type %s\n", + supply_type); + + ret = pcat_pmu_register_notify(supply->pmu, &supply->nb); + if (ret) + return ret; + + if (!wait_for_completion_timeout(&supply->initial_report, + msecs_to_jiffies(3000))) { + ret = dev_err_probe(dev, -ETIMEDOUT, + "timeout waiting for initial report\n"); + goto error; + } + + dev_info(dev, "Voltage: %u mV\n", supply->supply_microvolt); + + supply->desc.name = label; + supply->desc.get_property = pcat_pmu_get_supply_property; + + supply->psy = devm_power_supply_register(dev, &supply->desc, &psy_cfg); + if (IS_ERR(supply->psy)) { + ret = PTR_ERR(supply->psy); + dev_err_probe(dev, ret, "Failed to register supply\n"); + goto error; + } + + if (supply->type == PCAT_SUPPLY_BATTERY) { + ret = power_supply_get_battery_info(supply->psy, + &supply->bat_info); + if (ret) { + dev_err_probe(dev, ret, "Unable to get battery info\n"); + goto error; + } + } + + return 0; +error: + pcat_pmu_unregister_notify(supply->pmu, &supply->nb); + return ret; +} + +static void pcat_supply_remove(struct platform_device *pdev) +{ + struct pcat_supply *supply = platform_get_drvdata(pdev); + + pcat_pmu_unregister_notify(supply->pmu, &supply->nb); +} + +static const struct of_device_id pcat_supply_dt_ids[] = { + { .compatible = "ariaboard,photonicat-pmu-supply", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, pcat_supply_dt_ids); + +static struct platform_driver pcat_supply_driver = { + .driver = { + .name = "photonicat-supply", + .of_match_table = pcat_supply_dt_ids, + }, + .probe = pcat_supply_probe, + .remove = pcat_supply_remove, +}; +module_platform_driver(pcat_supply_driver); + +MODULE_AUTHOR("Junhao Xie <bigfoot@classfun.cn>"); +MODULE_DESCRIPTION("Photonicat PMU Power Supply"); +MODULE_LICENSE("GPL");

[4/9] power: supply: photonicat-supply: Add Photonicat PMU battery and charger

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