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platform/x86: inspur-platform-profile: Add platform profile support
Add support for Inspur platforms to used the platform profile feature. This will allow users to determine and control the platform modes between low-power, balanced and performance modes. Signed-off-by: Ai Chao <aichao@kylinos.cn> Reviewed-by: Thomas Weißschuh <linux@weissschuh.net> Reviewed-by: Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20231020024007.1677962-1-aichao@kylinos.cn [ij: Removed kerneldoc markers from non-kerneldoc comments.] Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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‎drivers/platform/x86/Kconfig

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@@ -988,6 +988,17 @@ config TOUCHSCREEN_DMI
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the OS-image for the device. This option supplies the missing info.
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Enable this for x86 tablets with Silead or Chipone touchscreens.
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config INSPUR_PLATFORM_PROFILE
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tristate "Inspur WMI platform profile driver"
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depends on ACPI_WMI
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select ACPI_PLATFORM_PROFILE
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help
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This will allow users to determine and control the platform modes
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between low-power, balanced and performance modes.
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To compile this driver as a module, choose M here: the module
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will be called inspur-platform-profile.
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source "drivers/platform/x86/x86-android-tablets/Kconfig"
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config FW_ATTR_CLASS

‎drivers/platform/x86/Makefile

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@@ -98,6 +98,9 @@ obj-$(CONFIG_TOSHIBA_WMI) += toshiba-wmi.o
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# before toshiba_acpi initializes
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obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
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# Inspur
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obj-$(CONFIG_INSPUR_PLATFORM_PROFILE) += inspur_platform_profile.o
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# Laptop drivers
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obj-$(CONFIG_ACPI_CMPC) += classmate-laptop.o
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obj-$(CONFIG_COMPAL_LAPTOP) += compal-laptop.o

‎drivers/platform/x86/inspur_platform_profile.c

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// SPDX-License-Identifier: GPL-2.0
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/*
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* Inspur WMI Platform Profile
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*
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* Copyright (C) 2018 Ai Chao <aichao@kylinos.cn>
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*/
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/platform_profile.h>
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#include <linux/wmi.h>
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#define WMI_INSPUR_POWERMODE_BIOS_GUID "596C31E3-332D-43C9-AEE9-585493284F5D"
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enum inspur_wmi_method_ids {
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INSPUR_WMI_GET_POWERMODE = 0x02,
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INSPUR_WMI_SET_POWERMODE = 0x03,
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};
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/*
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* Power Mode:
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* 0x0: Balance Mode
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* 0x1: Performance Mode
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* 0x2: Power Saver Mode
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*/
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enum inspur_tmp_profile {
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INSPUR_TMP_PROFILE_BALANCE = 0,
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INSPUR_TMP_PROFILE_PERFORMANCE = 1,
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INSPUR_TMP_PROFILE_POWERSAVE = 2,
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};
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struct inspur_wmi_priv {
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struct wmi_device *wdev;
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struct platform_profile_handler handler;
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};
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static int inspur_wmi_perform_query(struct wmi_device *wdev,
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enum inspur_wmi_method_ids query_id,
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void *buffer, size_t insize,
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size_t outsize)
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{
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_buffer input = { insize, buffer};
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union acpi_object *obj;
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acpi_status status;
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int ret = 0;
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status = wmidev_evaluate_method(wdev, 0, query_id, &input, &output);
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if (ACPI_FAILURE(status)) {
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dev_err(&wdev->dev, "EC Powermode control failed: %s\n",
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acpi_format_exception(status));
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return -EIO;
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}
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obj = output.pointer;
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if (!obj)
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return -EINVAL;
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if (obj->type != ACPI_TYPE_BUFFER ||
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obj->buffer.length != outsize) {
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ret = -EINVAL;
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goto out_free;
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}
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memcpy(buffer, obj->buffer.pointer, obj->buffer.length);
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out_free:
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kfree(obj);
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return ret;
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}
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/*
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* Set Power Mode to EC RAM. If Power Mode value greater than 0x3,
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* return error
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* Method ID: 0x3
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* Arg: 4 Bytes
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* Byte [0]: Power Mode:
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* 0x0: Balance Mode
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* 0x1: Performance Mode
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* 0x2: Power Saver Mode
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* Return Value: 4 Bytes
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* Byte [0]: Return Code
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* 0x0: No Error
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* 0x1: Error
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*/
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static int inspur_platform_profile_set(struct platform_profile_handler *pprof,
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enum platform_profile_option profile)
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{
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struct inspur_wmi_priv *priv = container_of(pprof, struct inspur_wmi_priv,
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handler);
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u8 ret_code[4] = {0, 0, 0, 0};
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int ret;
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switch (profile) {
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case PLATFORM_PROFILE_BALANCED:
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ret_code[0] = INSPUR_TMP_PROFILE_BALANCE;
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break;
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case PLATFORM_PROFILE_PERFORMANCE:
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ret_code[0] = INSPUR_TMP_PROFILE_PERFORMANCE;
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break;
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case PLATFORM_PROFILE_LOW_POWER:
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ret_code[0] = INSPUR_TMP_PROFILE_POWERSAVE;
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break;
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default:
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return -EOPNOTSUPP;
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}
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ret = inspur_wmi_perform_query(priv->wdev, INSPUR_WMI_SET_POWERMODE,
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ret_code, sizeof(ret_code),
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sizeof(ret_code));
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if (ret < 0)
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return ret;
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if (ret_code[0])
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return -EBADRQC;
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return 0;
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}
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/*
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* Get Power Mode from EC RAM, If Power Mode value greater than 0x3,
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* return error
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* Method ID: 0x2
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* Return Value: 4 Bytes
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* Byte [0]: Return Code
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* 0x0: No Error
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* 0x1: Error
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* Byte [1]: Power Mode
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* 0x0: Balance Mode
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* 0x1: Performance Mode
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* 0x2: Power Saver Mode
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*/
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static int inspur_platform_profile_get(struct platform_profile_handler *pprof,
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enum platform_profile_option *profile)
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{
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struct inspur_wmi_priv *priv = container_of(pprof, struct inspur_wmi_priv,
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handler);
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u8 ret_code[4] = {0, 0, 0, 0};
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int ret;
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ret = inspur_wmi_perform_query(priv->wdev, INSPUR_WMI_GET_POWERMODE,
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&ret_code, sizeof(ret_code),
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sizeof(ret_code));
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if (ret < 0)
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return ret;
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if (ret_code[0])
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return -EBADRQC;
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switch (ret_code[1]) {
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case INSPUR_TMP_PROFILE_BALANCE:
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*profile = PLATFORM_PROFILE_BALANCED;
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break;
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case INSPUR_TMP_PROFILE_PERFORMANCE:
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*profile = PLATFORM_PROFILE_PERFORMANCE;
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break;
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case INSPUR_TMP_PROFILE_POWERSAVE:
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*profile = PLATFORM_PROFILE_LOW_POWER;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int inspur_wmi_probe(struct wmi_device *wdev, const void *context)
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{
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struct inspur_wmi_priv *priv;
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priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->wdev = wdev;
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dev_set_drvdata(&wdev->dev, priv);
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priv->handler.profile_get = inspur_platform_profile_get;
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priv->handler.profile_set = inspur_platform_profile_set;
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set_bit(PLATFORM_PROFILE_LOW_POWER, priv->handler.choices);
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set_bit(PLATFORM_PROFILE_BALANCED, priv->handler.choices);
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set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->handler.choices);
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return platform_profile_register(&priv->handler);
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}
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static void inspur_wmi_remove(struct wmi_device *wdev)
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{
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platform_profile_remove();
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}
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static const struct wmi_device_id inspur_wmi_id_table[] = {
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{ .guid_string = WMI_INSPUR_POWERMODE_BIOS_GUID },
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{ }
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};
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MODULE_DEVICE_TABLE(wmi, inspur_wmi_id_table);
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static struct wmi_driver inspur_wmi_driver = {
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.driver = {
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.name = "inspur-wmi-platform-profile",
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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},
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.id_table = inspur_wmi_id_table,
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.probe = inspur_wmi_probe,
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.remove = inspur_wmi_remove,
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};
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module_wmi_driver(inspur_wmi_driver);
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MODULE_AUTHOR("Ai Chao <aichao@kylinos.cn>");
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MODULE_DESCRIPTION("Platform Profile Support for Inspur");
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MODULE_LICENSE("GPL");

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