123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256 |
- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * dptf_power: DPTF platform power driver
- * Copyright (c) 2016, Intel Corporation.
- */
- #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 and INT3532.
- * They are:
- * PMAX : Maximum platform power
- * PSRC : Platform power source
- * ARTG : Adapter rating
- * CTYP : Charger type
- * PROP : Rest of worst case platform Power
- * PBSS : Power Battery Steady State
- * RBHF : High Frequency Impedance
- * VBNL : Instantaneous No-Load Voltage
- * CMPP : Current Discharge Capability
- */
- #define DPTF_POWER_SHOW(name, object) \
- static ssize_t name##_show(struct device *dev,\
- struct device_attribute *attr,\
- char *buf)\
- {\
- struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
- 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)
- DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
- DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
- DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
- DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
- DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
- 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 DEVICE_ATTR_RO(rest_of_platform_power_mw);
- static DEVICE_ATTR_RO(max_steady_state_power_mw);
- static DEVICE_ATTR_RO(high_freq_impedance_mohm);
- static DEVICE_ATTR_RO(no_load_voltage_mv);
- static DEVICE_ATTR_RO(current_discharge_capbility_ma);
- static ssize_t prochot_confirm_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- struct acpi_device *acpi_dev = dev_get_drvdata(dev);
- acpi_status status;
- int seq_no;
- if (kstrtouint(buf, 0, &seq_no) < 0)
- return -EINVAL;
- status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
- if (ACPI_SUCCESS(status))
- return count;
- return -EINVAL;
- }
- static DEVICE_ATTR_WO(prochot_confirm);
- 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,
- &dev_attr_rest_of_platform_power_mw.attr,
- &dev_attr_prochot_confirm.attr,
- NULL
- };
- static const struct attribute_group dptf_power_attribute_group = {
- .attrs = dptf_power_attrs,
- .name = "dptf_power"
- };
- static struct attribute *dptf_battery_attrs[] = {
- &dev_attr_max_platform_power_mw.attr,
- &dev_attr_max_steady_state_power_mw.attr,
- &dev_attr_high_freq_impedance_mohm.attr,
- &dev_attr_no_load_voltage_mv.attr,
- &dev_attr_current_discharge_capbility_ma.attr,
- NULL
- };
- static const struct attribute_group dptf_battery_attribute_group = {
- .attrs = dptf_battery_attrs,
- .name = "dptf_battery"
- };
- #define MAX_POWER_CHANGED 0x80
- #define POWER_STATE_CHANGED 0x81
- #define STEADY_STATE_POWER_CHANGED 0x83
- #define POWER_PROP_CHANGE_EVENT 0x84
- #define IMPEDANCE_CHANGED 0x85
- #define VOLTAGE_CURRENT_CHANGED 0x86
- static long long dptf_participant_type(acpi_handle handle)
- {
- unsigned long long ptype;
- acpi_status status;
- status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- return ptype;
- }
- static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
- {
- struct platform_device *pdev = data;
- char *attr;
- switch (event) {
- case POWER_STATE_CHANGED:
- attr = "platform_power_source";
- break;
- case POWER_PROP_CHANGE_EVENT:
- attr = "rest_of_platform_power_mw";
- break;
- case MAX_POWER_CHANGED:
- attr = "max_platform_power_mw";
- break;
- case STEADY_STATE_POWER_CHANGED:
- attr = "max_steady_state_power_mw";
- break;
- case IMPEDANCE_CHANGED:
- attr = "high_freq_impedance_mohm";
- break;
- case VOLTAGE_CURRENT_CHANGED:
- attr = "no_load_voltage_mv";
- break;
- default:
- dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
- return;
- }
- /*
- * Notify that an attribute is changed, so that user space can read
- * again.
- */
- if (dptf_participant_type(handle) == 0x0CULL)
- sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
- else
- sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
- }
- static int dptf_power_add(struct platform_device *pdev)
- {
- const struct attribute_group *attr_group;
- struct acpi_device *acpi_dev;
- unsigned long long ptype;
- int result;
- acpi_dev = ACPI_COMPANION(&(pdev->dev));
- if (!acpi_dev)
- return -ENODEV;
- ptype = dptf_participant_type(acpi_dev->handle);
- if (ptype == 0x11)
- attr_group = &dptf_power_attribute_group;
- else if (ptype == 0x0C)
- attr_group = &dptf_battery_attribute_group;
- else
- return -ENODEV;
- result = acpi_install_notify_handler(acpi_dev->handle,
- ACPI_DEVICE_NOTIFY,
- dptf_power_notify,
- (void *)pdev);
- if (result)
- return result;
- result = sysfs_create_group(&pdev->dev.kobj,
- attr_group);
- if (result) {
- acpi_remove_notify_handler(acpi_dev->handle,
- ACPI_DEVICE_NOTIFY,
- dptf_power_notify);
- return result;
- }
- platform_set_drvdata(pdev, acpi_dev);
- return 0;
- }
- static int dptf_power_remove(struct platform_device *pdev)
- {
- struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
- acpi_remove_notify_handler(acpi_dev->handle,
- ACPI_DEVICE_NOTIFY,
- dptf_power_notify);
- if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
- sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
- else
- sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
- return 0;
- }
- static const struct acpi_device_id int3407_device_ids[] = {
- {"INT3407", 0},
- {"INT3532", 0},
- {"INTC1047", 0},
- {"INTC1050", 0},
- {"INTC1060", 0},
- {"INTC1061", 0},
- {"INTC1065", 0},
- {"INTC1066", 0},
- {"INTC10A4", 0},
- {"INTC10A5", 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_power",
- .acpi_match_table = int3407_device_ids,
- },
- };
- module_platform_driver(dptf_power_driver);
- MODULE_AUTHOR("Srinivas Pandruvada <[email protected]>");
- MODULE_LICENSE("GPL v2");
- MODULE_DESCRIPTION("ACPI DPTF platform power driver");
|