| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * dptf_power: DPTF platform power driver |
| 4 | * Copyright (c) 2016, Intel Corporation. |
| 5 | */ |
| 6 | |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/acpi.h> |
| 10 | #include <linux/platform_device.h> |
| 11 | |
| 12 | /* |
| 13 | * Presentation of attributes which are defined for INT3407. They are: |
| 14 | * PMAX : Maximum platform powe |
| 15 | * PSRC : Platform power source |
| 16 | * ARTG : Adapter rating |
| 17 | * CTYP : Charger type |
| 18 | * PBSS : Battery steady power |
| 19 | */ |
| 20 | #define DPTF_POWER_SHOW(name, object) \ |
| 21 | static ssize_t name##_show(struct device *dev,\ |
| 22 | struct device_attribute *attr,\ |
| 23 | char *buf)\ |
| 24 | {\ |
| 25 | struct acpi_device *acpi_dev = dev_get_drvdata(dev);\ |
| 26 | unsigned long long val;\ |
| 27 | acpi_status status;\ |
| 28 | \ |
| 29 | status = acpi_evaluate_integer(acpi_dev->handle, #object,\ |
| 30 | NULL, &val);\ |
| 31 | if (ACPI_SUCCESS(status))\ |
| 32 | return sprintf(buf, "%d\n", (int)val);\ |
| 33 | else \ |
| 34 | return -EINVAL;\ |
| 35 | } |
| 36 | |
| 37 | DPTF_POWER_SHOW(max_platform_power_mw, PMAX) |
| 38 | DPTF_POWER_SHOW(platform_power_source, PSRC) |
| 39 | DPTF_POWER_SHOW(adapter_rating_mw, ARTG) |
| 40 | DPTF_POWER_SHOW(battery_steady_power_mw, PBSS) |
| 41 | DPTF_POWER_SHOW(charger_type, CTYP) |
| 42 | |
| 43 | static DEVICE_ATTR_RO(max_platform_power_mw); |
| 44 | static DEVICE_ATTR_RO(platform_power_source); |
| 45 | static DEVICE_ATTR_RO(adapter_rating_mw); |
| 46 | static DEVICE_ATTR_RO(battery_steady_power_mw); |
| 47 | static DEVICE_ATTR_RO(charger_type); |
| 48 | |
| 49 | static struct attribute *dptf_power_attrs[] = { |
| 50 | &dev_attr_max_platform_power_mw.attr, |
| 51 | &dev_attr_platform_power_source.attr, |
| 52 | &dev_attr_adapter_rating_mw.attr, |
| 53 | &dev_attr_battery_steady_power_mw.attr, |
| 54 | &dev_attr_charger_type.attr, |
| 55 | NULL |
| 56 | }; |
| 57 | |
| 58 | static const struct attribute_group dptf_power_attribute_group = { |
| 59 | .attrs = dptf_power_attrs, |
| 60 | .name = "dptf_power" |
| 61 | }; |
| 62 | |
| 63 | static int dptf_power_add(struct platform_device *pdev) |
| 64 | { |
| 65 | struct acpi_device *acpi_dev; |
| 66 | acpi_status status; |
| 67 | unsigned long long ptype; |
| 68 | int result; |
| 69 | |
| 70 | acpi_dev = ACPI_COMPANION(&(pdev->dev)); |
| 71 | if (!acpi_dev) |
| 72 | return -ENODEV; |
| 73 | |
| 74 | status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype); |
| 75 | if (ACPI_FAILURE(status)) |
| 76 | return -ENODEV; |
| 77 | |
| 78 | if (ptype != 0x11) |
| 79 | return -ENODEV; |
| 80 | |
| 81 | result = sysfs_create_group(&pdev->dev.kobj, |
| 82 | &dptf_power_attribute_group); |
| 83 | if (result) |
| 84 | return result; |
| 85 | |
| 86 | platform_set_drvdata(pdev, acpi_dev); |
| 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | static int dptf_power_remove(struct platform_device *pdev) |
| 92 | { |
| 93 | |
| 94 | sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group); |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static const struct acpi_device_id int3407_device_ids[] = { |
| 100 | {"INT3407", 0}, |
| 101 | {"", 0}, |
| 102 | }; |
| 103 | MODULE_DEVICE_TABLE(acpi, int3407_device_ids); |
| 104 | |
| 105 | static struct platform_driver dptf_power_driver = { |
| 106 | .probe = dptf_power_add, |
| 107 | .remove = dptf_power_remove, |
| 108 | .driver = { |
| 109 | .name = "DPTF Platform Power", |
| 110 | .acpi_match_table = int3407_device_ids, |
| 111 | }, |
| 112 | }; |
| 113 | |
| 114 | module_platform_driver(dptf_power_driver); |
| 115 | |
| 116 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); |
| 117 | MODULE_LICENSE("GPL v2"); |
| 118 | MODULE_DESCRIPTION("ACPI DPTF platform power driver"); |