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This driver adds support for Dynamic Platform and Thermal Framework (DPTF) PCH (Platform Controller Hub) FIVR (Fully Integrated Voltage Regulator) participant support. This participant is responsible for exposing platform telemetry and control for: freq_mhz_high_clock freq_mhz_low_clock These attributes are used to get and set PCH FIVR switching frequency for thermal and radio frequency interference mitigation. Refer to Documentation/ABI/testing/sysfs-platform-dptf for ABI details. ACPI methods description used in this driver: RFC0: This ACPI method to set PCH FIVR switching frequency when FIVR clock is 19.2MHz or 24MHz. The ACPI method takes a DWORD value. GFC0: This ACPI method to get PCH FIVR switching frequency when FIVR clock is 19.2MHz or 24MHz. RFC1: This ACPI method to set PCH FIVR switching frequency when FIVR clock is 38.4MHz. The ACPI method takes a DWORD value. GFC1: This ACPI method to get PCH FIVR switching frequency when FIVR clock is 38.4MHz. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ACPI support for int340x thermal drivers
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*
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* Copyright (C) 2014, Intel Corporation
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* Authors: Zhang Rui <rui.zhang@intel.com>
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*/
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#include <linux/acpi.h>
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#include <linux/module.h>
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#include "../internal.h"
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#define INT3401_DEVICE 0X01
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static const struct acpi_device_id int340x_thermal_device_ids[] = {
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{"INT3400"},
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{"INT3401", INT3401_DEVICE},
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{"INT3402"},
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{"INT3403"},
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{"INT3404"},
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{"INT3406"},
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{"INT3407"},
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{"INT3408"},
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{"INT3409"},
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{"INT340A"},
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{"INT340B"},
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{"INTC1040"},
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{"INTC1043"},
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{"INTC1044"},
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{"INTC1045"},
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{"INTC1047"},
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{""},
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};
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static int int340x_thermal_handler_attach(struct acpi_device *adev,
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const struct acpi_device_id *id)
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{
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if (IS_ENABLED(CONFIG_INT340X_THERMAL))
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acpi_create_platform_device(adev, NULL);
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/* Intel SoC DTS thermal driver needs INT3401 to set IRQ descriptor */
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else if (IS_ENABLED(CONFIG_INTEL_SOC_DTS_THERMAL) &&
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id->driver_data == INT3401_DEVICE)
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acpi_create_platform_device(adev, NULL);
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return 1;
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}
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static struct acpi_scan_handler int340x_thermal_handler = {
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.ids = int340x_thermal_device_ids,
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.attach = int340x_thermal_handler_attach,
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};
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void __init acpi_int340x_thermal_init(void)
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{
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acpi_scan_add_handler(&int340x_thermal_handler);
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}
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