cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

intel_pmic_chtdc_ti.c (3362B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Dollar Cove TI PMIC operation region driver
      4 * Copyright (C) 2014 Intel Corporation. All rights reserved.
      5 *
      6 * Rewritten and cleaned up
      7 * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
      8 */
      9
     10#include <linux/acpi.h>
     11#include <linux/init.h>
     12#include <linux/mfd/intel_soc_pmic.h>
     13#include <linux/platform_device.h>
     14#include "intel_pmic.h"
     15
     16/* registers stored in 16bit BE (high:low, total 10bit) */
     17#define CHTDC_TI_VBAT		0x54
     18#define CHTDC_TI_DIETEMP	0x56
     19#define CHTDC_TI_BPTHERM	0x58
     20#define CHTDC_TI_GPADC		0x5a
     21
     22static struct pmic_table chtdc_ti_power_table[] = {
     23	{ .address = 0x00, .reg = 0x41 },
     24	{ .address = 0x04, .reg = 0x42 },
     25	{ .address = 0x08, .reg = 0x43 },
     26	{ .address = 0x0c, .reg = 0x45 },
     27	{ .address = 0x10, .reg = 0x46 },
     28	{ .address = 0x14, .reg = 0x47 },
     29	{ .address = 0x18, .reg = 0x48 },
     30	{ .address = 0x1c, .reg = 0x49 },
     31	{ .address = 0x20, .reg = 0x4a },
     32	{ .address = 0x24, .reg = 0x4b },
     33	{ .address = 0x28, .reg = 0x4c },
     34	{ .address = 0x2c, .reg = 0x4d },
     35	{ .address = 0x30, .reg = 0x4e },
     36};
     37
     38static struct pmic_table chtdc_ti_thermal_table[] = {
     39	{
     40		.address = 0x00,
     41		.reg = CHTDC_TI_GPADC
     42	},
     43	{
     44		.address = 0x0c,
     45		.reg = CHTDC_TI_GPADC
     46	},
     47	/* TMP2 -> SYSTEMP */
     48	{
     49		.address = 0x18,
     50		.reg = CHTDC_TI_GPADC
     51	},
     52	/* TMP3 -> BPTHERM */
     53	{
     54		.address = 0x24,
     55		.reg = CHTDC_TI_BPTHERM
     56	},
     57	{
     58		.address = 0x30,
     59		.reg = CHTDC_TI_GPADC
     60	},
     61	/* TMP5 -> DIETEMP */
     62	{
     63		.address = 0x3c,
     64		.reg = CHTDC_TI_DIETEMP
     65	},
     66};
     67
     68static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
     69				   u64 *value)
     70{
     71	int data;
     72
     73	if (regmap_read(regmap, reg, &data))
     74		return -EIO;
     75
     76	*value = data & 1;
     77	return 0;
     78}
     79
     80static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
     81				      bool on)
     82{
     83	return regmap_update_bits(regmap, reg, 1, on);
     84}
     85
     86static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
     87{
     88	u8 buf[2];
     89
     90	if (regmap_bulk_read(regmap, reg, buf, 2))
     91		return -EIO;
     92
     93	/* stored in big-endian */
     94	return ((buf[0] & 0x03) << 8) | buf[1];
     95}
     96
     97static const struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {
     98	.get_power = chtdc_ti_pmic_get_power,
     99	.update_power = chtdc_ti_pmic_update_power,
    100	.get_raw_temp = chtdc_ti_pmic_get_raw_temp,
    101	.lpat_raw_to_temp = acpi_lpat_raw_to_temp,
    102	.power_table = chtdc_ti_power_table,
    103	.power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
    104	.thermal_table = chtdc_ti_thermal_table,
    105	.thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
    106	.pmic_i2c_address = 0x5e,
    107};
    108
    109static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
    110{
    111	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
    112	int err;
    113
    114	err = intel_pmic_install_opregion_handler(&pdev->dev,
    115			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
    116			&chtdc_ti_pmic_opregion_data);
    117	if (err < 0)
    118		return err;
    119
    120	/* Re-enumerate devices depending on PMIC */
    121	acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
    122	return 0;
    123}
    124
    125static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
    126	{ .name = "chtdc_ti_region" },
    127	{},
    128};
    129
    130static struct platform_driver chtdc_ti_pmic_opregion_driver = {
    131	.probe = chtdc_ti_pmic_opregion_probe,
    132	.driver = {
    133		.name = "cht_dollar_cove_ti_pmic",
    134	},
    135	.id_table = chtdc_ti_pmic_opregion_id_table,
    136};
    137builtin_platform_driver(chtdc_ti_pmic_opregion_driver);