linux/drivers/platform/x86/pmc_atom.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Intel Atom SoC Power Management Controller Driver
 * Copyright (c) 2014-2015,2017,2022 Intel Corporation.
 */

#define pr_fmt(fmt) …

#include <linux/acpi.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_data/x86/clk-pmc-atom.h>
#include <linux/platform_data/x86/pmc_atom.h>
#include <linux/platform_data/x86/simatic-ipc.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/seq_file.h>
#include <linux/suspend.h>

struct pmc_bit_map { … };

struct pmc_reg_map { … };

struct pmc_data { … };

struct pmc_dev { … };

static struct pmc_dev pmc_device;
static u32 acpi_base_addr;

static const struct pmc_clk byt_clks[] = …;

static const struct pmc_clk cht_clks[] = …;

static const struct pmc_bit_map d3_sts_0_map[] = …;

static struct pmc_bit_map byt_d3_sts_1_map[] = …;

static struct pmc_bit_map cht_d3_sts_1_map[] = …;

static struct pmc_bit_map cht_func_dis_2_map[] = …;

static const struct pmc_bit_map byt_pss_map[] = …;

static const struct pmc_bit_map cht_pss_map[] = …;

static const struct pmc_reg_map byt_reg_map = …;

static const struct pmc_reg_map cht_reg_map = …;

static const struct pmc_data byt_data = …;

static const struct pmc_data cht_data = …;

static inline u32 pmc_reg_read(struct pmc_dev *pmc, int reg_offset)
{ … }

static inline void pmc_reg_write(struct pmc_dev *pmc, int reg_offset, u32 val)
{ … }

int pmc_atom_read(int offset, u32 *value)
{ … }

static void pmc_power_off(void)
{ … }

static void pmc_hw_reg_setup(struct pmc_dev *pmc)
{ … }

#ifdef CONFIG_DEBUG_FS
static void pmc_dev_state_print(struct seq_file *s, int reg_index,
				u32 sts, const struct pmc_bit_map *sts_map,
				u32 fd, const struct pmc_bit_map *fd_map)
{ … }

static int pmc_dev_state_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static int pmc_pss_state_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static int pmc_sleep_tmr_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static void pmc_dbgfs_register(struct pmc_dev *pmc)
{ … }
#else
static void pmc_dbgfs_register(struct pmc_dev *pmc)
{
}
#endif /* CONFIG_DEBUG_FS */

static bool pmc_clk_is_critical = …;

static int dmi_callback(const struct dmi_system_id *d)
{ … }

static int dmi_callback_siemens(const struct dmi_system_id *d)
{ … }

/*
 * Some systems need one or more of their pmc_plt_clks to be
 * marked as critical.
 */
static const struct dmi_system_id critclk_systems[] = …;

static int pmc_setup_clks(struct pci_dev *pdev, void __iomem *pmc_regmap,
			  const struct pmc_data *pmc_data)
{ … }

#ifdef CONFIG_SUSPEND
static void pmc_dev_state_check(u32 sts, const struct pmc_bit_map *sts_map,
				u32 fd, const struct pmc_bit_map *fd_map,
				u32 sts_possible_false_pos)
{ … }

static void pmc_s2idle_check(void)
{ … }

static struct acpi_s2idle_dev_ops pmc_s2idle_ops = …;

static void pmc_s2idle_check_register(void)
{ … }
#else
static void pmc_s2idle_check_register(void) {}
#endif

static int pmc_setup_dev(struct pci_dev *pdev, const struct pci_device_id *ent)
{ … }

/* Data for PCI driver interface used by pci_match_id() call below */
static const struct pci_device_id pmc_pci_ids[] = …;

static int __init pmc_atom_init(void)
{ … }

device_initcall(pmc_atom_init);

/*
MODULE_AUTHOR("Aubrey Li <[email protected]>");
MODULE_DESCRIPTION("Intel Atom SoC Power Management Controller Interface");
MODULE_LICENSE("GPL v2");
*/