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+/*
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+ * dptf_power: DPTF platform power driver
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+ * Copyright (c) 2016, Intel Corporation.
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms and conditions of the GNU General Public License,
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+ * version 2, as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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+ *
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/acpi.h>
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+#include <linux/platform_device.h>
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+
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+/*
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+ * Presentation of attributes which are defined for INT3407. They are:
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+ * PMAX : Maximum platform powe
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+ * PSRC : Platform power source
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+ * ARTG : Adapter rating
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+ * CTYP : Charger type
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+ * PBSS : Battery steady power
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+ */
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+#define DPTF_POWER_SHOW(name, object) \
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+static ssize_t name##_show(struct device *dev,\
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+ struct device_attribute *attr,\
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+ char *buf)\
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+{\
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+ struct platform_device *pdev = to_platform_device(dev);\
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+ struct acpi_device *acpi_dev = platform_get_drvdata(pdev);\
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+ unsigned long long val;\
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+ acpi_status status;\
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+\
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+ status = acpi_evaluate_integer(acpi_dev->handle, #object,\
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+ NULL, &val);\
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+ if (ACPI_SUCCESS(status))\
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+ return sprintf(buf, "%d\n", (int)val);\
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+ else \
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+ return -EINVAL;\
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+}
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+
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+DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
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+DPTF_POWER_SHOW(platform_power_source, PSRC)
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+DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
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+DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
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+DPTF_POWER_SHOW(charger_type, CTYP)
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+
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+static DEVICE_ATTR_RO(max_platform_power_mw);
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+static DEVICE_ATTR_RO(platform_power_source);
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+static DEVICE_ATTR_RO(adapter_rating_mw);
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+static DEVICE_ATTR_RO(battery_steady_power_mw);
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+static DEVICE_ATTR_RO(charger_type);
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+
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+static struct attribute *dptf_power_attrs[] = {
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+ &dev_attr_max_platform_power_mw.attr,
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+ &dev_attr_platform_power_source.attr,
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+ &dev_attr_adapter_rating_mw.attr,
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+ &dev_attr_battery_steady_power_mw.attr,
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+ &dev_attr_charger_type.attr,
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+ NULL
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+};
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+
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+static struct attribute_group dptf_power_attribute_group = {
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+ .attrs = dptf_power_attrs,
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+ .name = "dptf_power"
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+};
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+
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+static int dptf_power_add(struct platform_device *pdev)
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+{
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+ struct acpi_device *acpi_dev;
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+ acpi_status status;
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+ unsigned long long ptype;
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+ int result;
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+
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+ acpi_dev = ACPI_COMPANION(&(pdev->dev));
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+ if (!acpi_dev)
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+ return -ENODEV;
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+
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+ status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype);
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+ if (ACPI_FAILURE(status))
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+ return -ENODEV;
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+
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+ if (ptype != 0x11)
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+ return -ENODEV;
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+
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+ result = sysfs_create_group(&pdev->dev.kobj,
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+ &dptf_power_attribute_group);
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+ if (result)
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+ return result;
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+
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+ platform_set_drvdata(pdev, acpi_dev);
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+
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+ return 0;
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+}
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+
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+static int dptf_power_remove(struct platform_device *pdev)
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+{
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+
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+ sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
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+
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+ return 0;
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+}
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+
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+static const struct acpi_device_id int3407_device_ids[] = {
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+ {"INT3407", 0},
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+ {"", 0},
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+};
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+MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
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+
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+static struct platform_driver dptf_power_driver = {
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+ .probe = dptf_power_add,
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+ .remove = dptf_power_remove,
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+ .driver = {
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+ .name = "DPTF Platform Power",
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+ .acpi_match_table = int3407_device_ids,
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+ },
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+};
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+
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+module_platform_driver(dptf_power_driver);
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+
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+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
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+MODULE_LICENSE("GPL v2");
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+MODULE_DESCRIPTION("ACPI DPTF platform power driver");
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Srinivas Pandruvada