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([188.163.112.51]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-acaa1be98d4sm728571266b.59.2025.04.13.04.10.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Apr 2025 04:10:54 -0700 (PDT) From: Svyatoslav Ryhel To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , Neil Armstrong , Jonathan Cameron , Heiko Stuebner , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Aradhya Bhatia , Svyatoslav Ryhel Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 1/4] dt-bindings: vendor-prefixes: add prefix for Pegatron Corporation Date: Sun, 13 Apr 2025 14:10:30 +0300 Message-ID: <20250413111033.11408-2-clamor95@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250413111033.11408-1-clamor95@gmail.com> References: <20250413111033.11408-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 PEGATRON Corporation is a Taiwanese electronics manufacturing company that mainly develops computing, communications and consumer electronics for branded vendors. Link https://www.pegatroncorp.com/ Signed-off-by: Svyatoslav Ryhel Acked-by: Rob Herring (Arm) --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml index da01616802c7..d36389aa4d7b 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -1146,6 +1146,8 @@ patternProperties: description: Parallax Inc. "^pda,.*": description: Precision Design Associates, Inc. + "^pegatron,.*": + description: Pegatron Corporation "^pericom,.*": description: Pericom Technology Inc. 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([188.163.112.51]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-acaa1be98d4sm728571266b.59.2025.04.13.04.10.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Apr 2025 04:10:56 -0700 (PDT) From: Svyatoslav Ryhel To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , Neil Armstrong , Jonathan Cameron , Heiko Stuebner , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Aradhya Bhatia , Svyatoslav Ryhel Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 2/4] dt-bindings: power: supply: Document Pegatron Chagall fuel gauge Date: Sun, 13 Apr 2025 14:10:31 +0300 Message-ID: <20250413111033.11408-3-clamor95@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250413111033.11408-1-clamor95@gmail.com> References: <20250413111033.11408-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add binding for Pegatron Chagall tablets battery monitor. Signed-off-by: Svyatoslav Ryhel Reviewed-by: Rob Herring (Arm) --- .../power/supply/pegatron,chagall-ec.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/pegatron,chagall-ec.yaml diff --git a/Documentation/devicetree/bindings/power/supply/pegatron,chagall-ec.yaml b/Documentation/devicetree/bindings/power/supply/pegatron,chagall-ec.yaml new file mode 100644 index 000000000000..defb0861e268 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/pegatron,chagall-ec.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/pegatron,chagall-ec.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Pegatron Chagall EC + +maintainers: + - Svyatoslav Ryhel + +description: + Pegatron Chagall EC is based on an 8-bit programmable microcontroller from + Infineon/Cypress Semiconductor, it communicates over I2C and is used in the + Pegatron Chagall tablet for fuel gauge and battery control functions. + +$ref: /schemas/power/supply/power-supply.yaml + +properties: + compatible: + const: pegatron,chagall-ec + + reg: + maxItems: 1 + + monitored-battery: true + power-supplies: true + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + embedded-controller@10 { + compatible = "pegatron,chagall-ec"; + reg = <0x10>; + + monitored-battery = <&battery>; + power-supplies = <&mains>; + }; + }; +... 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([188.163.112.51]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-acaa1be98d4sm728571266b.59.2025.04.13.04.10.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Apr 2025 04:10:57 -0700 (PDT) From: Svyatoslav Ryhel To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , Neil Armstrong , Jonathan Cameron , Heiko Stuebner , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Aradhya Bhatia , Svyatoslav Ryhel Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 3/4] power/supply: Add driver for Pegatron Chagall battery Date: Sun, 13 Apr 2025 14:10:32 +0300 Message-ID: <20250413111033.11408-4-clamor95@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250413111033.11408-1-clamor95@gmail.com> References: <20250413111033.11408-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The Pegatron Chagall is an Android tablet utilizing a customized Cypress CG7153AM microcontroller (MCU) as its battery fuel gauge. It supports a single-cell battery and features a dual-color charging LED. Signed-off-by: Svyatoslav Ryhel --- drivers/power/supply/Kconfig | 12 + drivers/power/supply/Makefile | 1 + drivers/power/supply/chagall-battery.c | 308 +++++++++++++++++++++++++ 3 files changed, 321 insertions(+) create mode 100644 drivers/power/supply/chagall-battery.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 9f2eef6787f7..d0fc9db524bd 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -107,6 +107,18 @@ config BATTERY_ACT8945A Say Y here to enable support for power supply provided by Active-semi ActivePath ACT8945A charger. +config BATTERY_CHAGALL + tristate "Pegatron Chagall battery driver" + depends on I2C + depends on LEDS_CLASS + help + Say Y to include support for Cypress CG7153AM IC based battery + fuel gauge with custom firmware found in Pegatron Chagall based + tablet line. + + This driver can also be built as a module. If so, the module will be + called chagall-battery. + config BATTERY_CPCAP tristate "Motorola CPCAP PMIC battery driver" depends on MFD_CPCAP && IIO diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 59c4a9f40d28..4ecf48a33fdd 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_CHARGER_ADP5061) += adp5061.o obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o +obj-$(CONFIG_BATTERY_CHAGALL) += chagall-battery.o obj-$(CONFIG_BATTERY_CPCAP) += cpcap-battery.o obj-$(CONFIG_BATTERY_CW2015) += cw2015_battery.o obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o diff --git a/drivers/power/supply/chagall-battery.c b/drivers/power/supply/chagall-battery.c new file mode 100644 index 000000000000..1a278331efe7 --- /dev/null +++ b/drivers/power/supply/chagall-battery.c @@ -0,0 +1,308 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CHAGALL_REG_LED_AMBER 0x60 +#define CHAGALL_REG_LED_WHITE 0x70 +#define CHAGALL_REG_BATTERY_TEMPERATURE 0xa2 +#define CHAGALL_REG_BATTERY_VOLTAGE 0xa4 +#define CHAGALL_REG_BATTERY_CURRENT 0xa6 +#define CHAGALL_REG_BATTERY_CAPACITY 0xa8 +#define CHAGALL_REG_BATTERY_CHARGING_CURRENT 0xaa +#define CHAGALL_REG_BATTERY_CHARGING_VOLTAGE 0xac +#define CHAGALL_REG_BATTERY_STATUS 0xae +#define BATTERY_DISCHARGING BIT(6) +#define BATTERY_FULL_CHARGED BIT(5) +#define BATTERY_FULL_DISCHARGED BIT(4) +#define CHAGALL_REG_BATTERY_REMAIN_CAPACITY 0xb0 +#define CHAGALL_REG_BATTERY_FULL_CAPACITY 0xb2 +#define CHAGALL_REG_MAX_COUNT 0xb4 + +#define CHAGALL_BATTERY_DATA_REFRESH 5000 +#define TEMP_CELSIUS_OFFSET 2731 + +static const struct regmap_config chagall_battery_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = CHAGALL_REG_MAX_COUNT, + .reg_format_endian = REGMAP_ENDIAN_LITTLE, + .val_format_endian = REGMAP_ENDIAN_LITTLE, +}; + +struct chagall_battery_data { + struct regmap *regmap; + struct led_classdev amber_led; + struct led_classdev white_led; + struct power_supply *battery; + struct delayed_work poll_work; + u16 last_state; +}; + +static void chagall_led_set_brightness_amber(struct led_classdev *led, + enum led_brightness brightness) +{ + struct chagall_battery_data *cg = + container_of(led, struct chagall_battery_data, amber_led); + + regmap_write(cg->regmap, CHAGALL_REG_LED_AMBER, brightness); +} + +static void chagall_led_set_brightness_white(struct led_classdev *led, + enum led_brightness brightness) +{ + struct chagall_battery_data *cg = + container_of(led, struct chagall_battery_data, white_led); + + regmap_write(cg->regmap, CHAGALL_REG_LED_WHITE, brightness); +} + +static void chagall_leds_status_update(struct chagall_battery_data *cg, int state) +{ + switch (state) { + case POWER_SUPPLY_STATUS_FULL: + led_set_brightness(&cg->amber_led, LED_OFF); + led_set_brightness(&cg->white_led, LED_ON); + break; + + case POWER_SUPPLY_STATUS_CHARGING: + led_set_brightness(&cg->white_led, LED_OFF); + led_set_brightness(&cg->amber_led, LED_ON); + break; + + default: + led_set_brightness(&cg->amber_led, LED_OFF); + led_set_brightness(&cg->white_led, LED_OFF); + break; + } +} + +static const enum power_supply_property chagall_battery_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, +}; + +static const unsigned int chagall_battery_prop_offs[] = { + [POWER_SUPPLY_PROP_TEMP] = CHAGALL_REG_BATTERY_TEMPERATURE, + [POWER_SUPPLY_PROP_VOLTAGE_NOW] = CHAGALL_REG_BATTERY_VOLTAGE, + [POWER_SUPPLY_PROP_CURRENT_NOW] = CHAGALL_REG_BATTERY_CURRENT, + [POWER_SUPPLY_PROP_CAPACITY] = CHAGALL_REG_BATTERY_CAPACITY, + [POWER_SUPPLY_PROP_CURRENT_MAX] = CHAGALL_REG_BATTERY_CHARGING_CURRENT, + [POWER_SUPPLY_PROP_VOLTAGE_MAX] = CHAGALL_REG_BATTERY_CHARGING_VOLTAGE, + [POWER_SUPPLY_PROP_STATUS] = CHAGALL_REG_BATTERY_STATUS, + [POWER_SUPPLY_PROP_CHARGE_NOW] = CHAGALL_REG_BATTERY_REMAIN_CAPACITY, + [POWER_SUPPLY_PROP_CHARGE_FULL] = CHAGALL_REG_BATTERY_FULL_CAPACITY, +}; + +static int chagall_battery_get_value(struct chagall_battery_data *cg, + enum power_supply_property psp, u32 *val) +{ + if (psp >= ARRAY_SIZE(chagall_battery_prop_offs)) + return -EINVAL; + if (!chagall_battery_prop_offs[psp]) + return -EINVAL; + + /* Battery data is stored in 2 consecutive registers with little-endian */ + return regmap_bulk_read(cg->regmap, chagall_battery_prop_offs[psp], val, 2); +} + +static int chagall_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct chagall_battery_data *cg = power_supply_get_drvdata(psy); + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_PRESENT: + val->intval = 1; + break; + + default: + ret = chagall_battery_get_value(cg, psp, &val->intval); + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_TEMP: + val->intval -= TEMP_CELSIUS_OFFSET; + break; + + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + case POWER_SUPPLY_PROP_CURRENT_MAX: + case POWER_SUPPLY_PROP_CURRENT_NOW: + case POWER_SUPPLY_PROP_CHARGE_FULL: + case POWER_SUPPLY_PROP_CHARGE_NOW: + val->intval *= 1000; + break; + + case POWER_SUPPLY_PROP_STATUS: + if (val->intval & BATTERY_FULL_CHARGED) + val->intval = POWER_SUPPLY_STATUS_FULL; + else if (val->intval & BATTERY_FULL_DISCHARGED) + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + else if (val->intval & BATTERY_DISCHARGING) + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + + default: + break; + } + + break; + } + + return 0; +} + +static void chagall_battery_poll_work(struct work_struct *work) +{ + struct chagall_battery_data *cg = + container_of(work, struct chagall_battery_data, poll_work.work); + u32 state; + int ret; + + ret = chagall_battery_get_value(cg, POWER_SUPPLY_PROP_STATUS, &state); + if (ret) + return; + + if (state & BATTERY_FULL_CHARGED) + state = POWER_SUPPLY_STATUS_FULL; + else if (state & BATTERY_DISCHARGING) + state = POWER_SUPPLY_STATUS_DISCHARGING; + else + state = POWER_SUPPLY_STATUS_CHARGING; + + if (cg->last_state != state) { + cg->last_state = state; + power_supply_changed(cg->battery); + } + + chagall_leds_status_update(cg, state); + + /* continuously send uevent notification */ + schedule_delayed_work(&cg->poll_work, + msecs_to_jiffies(CHAGALL_BATTERY_DATA_REFRESH)); +} + +static const struct power_supply_desc chagall_battery_desc = { + .name = "chagall-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = chagall_battery_properties, + .num_properties = ARRAY_SIZE(chagall_battery_properties), + .get_property = chagall_battery_get_property, + .external_power_changed = power_supply_changed, +}; + +static int chagall_battery_probe(struct i2c_client *client) +{ + struct chagall_battery_data *cg; + struct device *dev = &client->dev; + struct power_supply_config cfg = { }; + int ret; + + cg = devm_kzalloc(dev, sizeof(*cg), GFP_KERNEL); + if (!cg) + return -ENOMEM; + + cfg.drv_data = cg; + cfg.fwnode = dev_fwnode(dev); + + i2c_set_clientdata(client, cg); + + cg->regmap = devm_regmap_init_i2c(client, &chagall_battery_regmap_config); + if (IS_ERR(cg->regmap)) + return dev_err_probe(dev, PTR_ERR(cg->regmap), "cannot allocate regmap\n"); + + cg->last_state = POWER_SUPPLY_STATUS_UNKNOWN; + cg->battery = devm_power_supply_register(dev, &chagall_battery_desc, &cfg); + if (IS_ERR(cg->battery)) + return dev_err_probe(dev, PTR_ERR(cg->battery), "failed to register power supply\n"); + + cg->amber_led.name = "power::amber"; + cg->amber_led.max_brightness = 1; + cg->amber_led.flags = LED_CORE_SUSPENDRESUME; + cg->amber_led.brightness_set = chagall_led_set_brightness_amber; + + ret = devm_led_classdev_register(dev, &cg->amber_led); + if (ret) + return dev_err_probe(dev, ret, "failed to register amber LED\n"); + + cg->white_led.name = "power::white"; + cg->white_led.max_brightness = 1; + cg->white_led.flags = LED_CORE_SUSPENDRESUME; + cg->white_led.brightness_set = chagall_led_set_brightness_white; + + ret = devm_led_classdev_register(dev, &cg->white_led); + if (ret) + return dev_err_probe(dev, ret, "failed to register white LED\n"); + + led_set_brightness(&cg->amber_led, LED_OFF); + led_set_brightness(&cg->white_led, LED_OFF); + + ret = devm_delayed_work_autocancel(dev, &cg->poll_work, chagall_battery_poll_work); + if (ret) + return ret; + + schedule_delayed_work(&cg->poll_work, msecs_to_jiffies(CHAGALL_BATTERY_DATA_REFRESH)); + return 0; +} + +static int __maybe_unused chagall_battery_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct chagall_battery_data *cg = i2c_get_clientdata(client); + + cancel_delayed_work_sync(&cg->poll_work); + return 0; +} + +static int __maybe_unused chagall_battery_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct chagall_battery_data *cg = i2c_get_clientdata(client); + + schedule_delayed_work(&cg->poll_work, msecs_to_jiffies(CHAGALL_BATTERY_DATA_REFRESH)); + return 0; +} + +static SIMPLE_DEV_PM_OPS(chagall_battery_pm_ops, + chagall_battery_suspend, chagall_battery_resume); + +static const struct of_device_id chagall_of_match[] = { + { .compatible = "pegatron,chagall-ec" }, + { } +}; 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([188.163.112.51]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-acaa1be98d4sm728571266b.59.2025.04.13.04.10.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Apr 2025 04:10:59 -0700 (PDT) From: Svyatoslav Ryhel To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , Neil Armstrong , Jonathan Cameron , Heiko Stuebner , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Aradhya Bhatia , Svyatoslav Ryhel Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 4/4] ARM: tegra: chagall: Add embedded controller node Date: Sun, 13 Apr 2025 14:10:33 +0300 Message-ID: <20250413111033.11408-5-clamor95@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250413111033.11408-1-clamor95@gmail.com> References: <20250413111033.11408-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add embedded controller node to Pegatron Chagall device-tree. Signed-off-by: Svyatoslav Ryhel --- .../boot/dts/nvidia/tegra30-pegatron-chagall.dts | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dts b/arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dts index 4012f9c799a8..b7d0ebb766a6 100644 --- a/arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dts +++ b/arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dts @@ -1155,6 +1155,14 @@ lcd_ddc: i2c@7000c000 { status = "okay"; clock-frequency = <400000>; + embedded-controller@10 { + compatible = "pegatron,chagall-ec"; + reg = <0x10>; + + monitored-battery = <&battery>; + power-supplies = <&mains>; + }; + /* Wolfson Microelectronics WM8903 audio codec */ wm8903: audio-codec@1a { compatible = "wlf,wm8903"; @@ -2596,6 +2604,14 @@ backlight: backlight { default-brightness-level = <15>; }; + battery: battery-cell { + compatible = "simple-battery"; + device-chemistry = "lithium-ion-polymer"; + charge-full-design-microamp-hours = <3050000>; + energy-full-design-microwatt-hours = <23000000>; + operating-range-celsius = <0 45>; + }; + /* PMIC has a built-in 32KHz oscillator which is used by PMC */ clk32k_in: clock-32k { compatible = "fixed-clock";