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Some of the PM features can be locked or disabled. In that case, write interface can be locked. This status is read via a mailbox. There is one TPMI ID which provides base address for interface and data register for mail box operation. The mailbox operations is defined in the TPMI specification. Refer to https://github.com/intel/tpmi_power_management/ for TPMI specifications. An API is exposed to feature drivers to read feature control status. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20230712225950.171326-2-srinivas.pandruvada@linux.intel.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
32 lines
979 B
C
32 lines
979 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* intel_tpmi.h: Intel TPMI core external interface
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*/
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#ifndef _INTEL_TPMI_H_
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#define _INTEL_TPMI_H_
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/**
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* struct intel_tpmi_plat_info - Platform information for a TPMI device instance
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* @package_id: CPU Package id
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* @bus_number: PCI bus number
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* @device_number: PCI device number
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* @function_number: PCI function number
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*
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* Structure to store platform data for a TPMI device instance. This
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* struct is used to return data via tpmi_get_platform_data().
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*/
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struct intel_tpmi_plat_info {
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u8 package_id;
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u8 bus_number;
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u8 device_number;
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u8 function_number;
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};
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struct intel_tpmi_plat_info *tpmi_get_platform_data(struct auxiliary_device *auxdev);
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struct resource *tpmi_get_resource_at_index(struct auxiliary_device *auxdev, int index);
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int tpmi_get_resource_count(struct auxiliary_device *auxdev);
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int tpmi_get_feature_status(struct auxiliary_device *auxdev, int feature_id, int *locked,
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int *disabled);
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#endif
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