1 files changed, 128 insertions, 0 deletions

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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/platform_device.h>
+
+/*
+ * 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 <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ACPI DPTF platform power driver");