From 6256ebd5daf93505f12b66916fb1b961b38f4cf2 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Sun, 17 Jul 2016 13:45:32 -0700 Subject: ACPI / DPTF: Add DPTF power participant driver This driver adds support for Dynamic Platform and Thermal Framework (DPTF) Platform Power Participant device (INT3407) support. This participant is responsible for exposing platform telemetry such as: max_platform_power platform_power_source adapter_rating battery_steady_power charger_type These attributes are presented via sysfs interface under the INT3407 platform device: $ls /sys/bus/platform/devices/INT3407\:00/dptf_power/ adapter_rating_mw battery_steady_power_mw charger_type max_platform_power_mw platform_power_source ` ACPI methods description used in this driver: PMAX: Maximum platform power that can be supported by the battery in mW. PSRC: System charge source, 0x00 = DC 0x01 = AC 0x02 = USB 0x03 = Wireless Charger ARTG: Adapter rating in mW (Maximum Adapter power) Must be 0 if no AC adapter is plugged in. CTYP: Charger Type, Traditional : 0x01 Hybrid: 0x02 NVDC: 0x03 PBSS: Returns max sustained power for battery in milliWatts. The INT3407 also contains _BTS and _BIX objects, which are compliant to ACPI 5.0, specification. Those objects are already used by ACPI battery (PNP0C0A) driver and information about them is exported via Linux power supply class registration. Signed-off-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki --- drivers/acpi/Kconfig | 1 + drivers/acpi/Makefile | 1 + drivers/acpi/dptf/Kconfig | 15 +++++ drivers/acpi/dptf/Makefile | 1 + drivers/acpi/dptf/dptf_power.c | 128 +++++++++++++++++++++++++++++++++++++++++ 5 files changed, 146 insertions(+) create mode 100644 drivers/acpi/dptf/Kconfig create mode 100644 drivers/acpi/dptf/Makefile create mode 100644 drivers/acpi/dptf/dptf_power.c diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index b7e2e776397d..b91a35bfc999 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -475,6 +475,7 @@ config ACPI_NFIT_DEBUG issue. source "drivers/acpi/apei/Kconfig" +source "drivers/acpi/dptf/Kconfig" config ACPI_EXTLOG tristate "Extended Error Log support" diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 251ce85a66fb..f6d0cc0fb4e1 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -101,3 +101,4 @@ obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o video-objs += acpi_video.o video_detect.o +obj-y += dptf/ diff --git a/drivers/acpi/dptf/Kconfig b/drivers/acpi/dptf/Kconfig new file mode 100644 index 000000000000..ac0a6ed0cf46 --- /dev/null +++ b/drivers/acpi/dptf/Kconfig @@ -0,0 +1,15 @@ +config DPTF_POWER + tristate "DPTF Platform Power Participant" + depends on X86 + help + This driver adds support for Dynamic Platform and Thermal Framework + (DPTF) Platform Power Participant device (INT3407) support. + This participant is responsible for exposing platform telemetry: + max_platform_power + platform_power_source + adapter_rating + battery_steady_power + charger_type + + To compile this driver as a module, choose M here: + the module will be called dptf_power. diff --git a/drivers/acpi/dptf/Makefile b/drivers/acpi/dptf/Makefile new file mode 100644 index 000000000000..62cbe8753a19 --- /dev/null +++ b/drivers/acpi/dptf/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_DPTF_POWER) += dptf_power.o diff --git a/drivers/acpi/dptf/dptf_power.c b/drivers/acpi/dptf/dptf_power.c new file mode 100644 index 000000000000..734642dc5008 --- /dev/null +++ b/drivers/acpi/dptf/dptf_power.c @@ -0,0 +1,128 @@ +/* + * dptf_power: DPTF platform power driver + * Copyright (c) 2016, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include +#include +#include +#include + +/* + * Presentation of attributes which are defined for INT3407. They are: + * PMAX : Maximum platform powe + * PSRC : Platform power source + * ARTG : Adapter rating + * CTYP : Charger type + * PBSS : Battery steady power + */ +#define DPTF_POWER_SHOW(name, object) \ +static ssize_t name##_show(struct device *dev,\ + struct device_attribute *attr,\ + char *buf)\ +{\ + struct platform_device *pdev = to_platform_device(dev);\ + struct acpi_device *acpi_dev = platform_get_drvdata(pdev);\ + unsigned long long val;\ + acpi_status status;\ +\ + status = acpi_evaluate_integer(acpi_dev->handle, #object,\ + NULL, &val);\ + if (ACPI_SUCCESS(status))\ + return sprintf(buf, "%d\n", (int)val);\ + else \ + return -EINVAL;\ +} + +DPTF_POWER_SHOW(max_platform_power_mw, PMAX) +DPTF_POWER_SHOW(platform_power_source, PSRC) +DPTF_POWER_SHOW(adapter_rating_mw, ARTG) +DPTF_POWER_SHOW(battery_steady_power_mw, PBSS) +DPTF_POWER_SHOW(charger_type, CTYP) + +static DEVICE_ATTR_RO(max_platform_power_mw); +static DEVICE_ATTR_RO(platform_power_source); +static DEVICE_ATTR_RO(adapter_rating_mw); +static DEVICE_ATTR_RO(battery_steady_power_mw); +static DEVICE_ATTR_RO(charger_type); + +static struct attribute *dptf_power_attrs[] = { + &dev_attr_max_platform_power_mw.attr, + &dev_attr_platform_power_source.attr, + &dev_attr_adapter_rating_mw.attr, + &dev_attr_battery_steady_power_mw.attr, + &dev_attr_charger_type.attr, + NULL +}; + +static struct attribute_group dptf_power_attribute_group = { + .attrs = dptf_power_attrs, + .name = "dptf_power" +}; + +static int dptf_power_add(struct platform_device *pdev) +{ + struct acpi_device *acpi_dev; + acpi_status status; + unsigned long long ptype; + int result; + + acpi_dev = ACPI_COMPANION(&(pdev->dev)); + if (!acpi_dev) + return -ENODEV; + + status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype); + if (ACPI_FAILURE(status)) + return -ENODEV; + + if (ptype != 0x11) + return -ENODEV; + + result = sysfs_create_group(&pdev->dev.kobj, + &dptf_power_attribute_group); + if (result) + return result; + + platform_set_drvdata(pdev, acpi_dev); + + return 0; +} + +static int dptf_power_remove(struct platform_device *pdev) +{ + + sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group); + + return 0; +} + +static const struct acpi_device_id int3407_device_ids[] = { + {"INT3407", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, int3407_device_ids); + +static struct platform_driver dptf_power_driver = { + .probe = dptf_power_add, + .remove = dptf_power_remove, + .driver = { + .name = "DPTF Platform Power", + .acpi_match_table = int3407_device_ids, + }, +}; + +module_platform_driver(dptf_power_driver); + +MODULE_AUTHOR("Srinivas Pandruvada "); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("ACPI DPTF platform power driver"); -- cgit v1.2.3