linux/drivers/acpi/dptf/dptf_pch_fivr.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * dptf_pch_fivr:  DPTF PCH FIVR Participant driver
 * Copyright (c) 2020, Intel Corporation.
 */

#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>

struct pch_fivr_resp { … };

static int pch_fivr_read(acpi_handle handle, char *method, struct pch_fivr_resp *fivr_resp)
{ … }

/*
 * Presentation of attributes which are defined for INTC10xx
 * They are:
 * freq_mhz_low_clock : Set PCH FIVR switching freq for
 *			FIVR clock 19.2MHz and 24MHz
 * freq_mhz_high_clock : Set PCH FIVR switching freq for
 *			FIVR clock 38.4MHz
 */
#define PCH_FIVR_SHOW(name, method) …

#define PCH_FIVR_STORE(name, method) …

PCH_FIVR_SHOW(freq_mhz_low_clock, GFC0)
PCH_FIVR_SHOW(freq_mhz_high_clock, GFC1)
PCH_FIVR_SHOW(ssc_clock_info, GEMI)
PCH_FIVR_SHOW(fivr_switching_freq_mhz, GFCS)
PCH_FIVR_SHOW(fivr_switching_fault_status, GFFS)
PCH_FIVR_STORE(freq_mhz_low_clock, RFC0)
PCH_FIVR_STORE(freq_mhz_high_clock, RFC1)

static DEVICE_ATTR_RW(freq_mhz_low_clock);
static DEVICE_ATTR_RW(freq_mhz_high_clock);
static DEVICE_ATTR_RO(ssc_clock_info);
static DEVICE_ATTR_RO(fivr_switching_freq_mhz);
static DEVICE_ATTR_RO(fivr_switching_fault_status);

static struct attribute *fivr_attrs[] = …;

static const struct attribute_group pch_fivr_attribute_group = …;

static int pch_fivr_add(struct platform_device *pdev)
{ … }

static void pch_fivr_remove(struct platform_device *pdev)
{ … }

static const struct acpi_device_id pch_fivr_device_ids[] = …;
MODULE_DEVICE_TABLE(acpi, pch_fivr_device_ids);

static struct platform_driver pch_fivr_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;