LXR linux/drivers/acpi/pmic/intel_pmic_chtdc

   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 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        .power_table = chtdc_ti_power_table,
 102        .power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
 103        .thermal_table = chtdc_ti_thermal_table,
 104        .thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
 105        .pmic_i2c_address = 0x5e,
 106};
 107
 108static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
 109{
 110        struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
 111        int err;
 112
 113        err = intel_pmic_install_opregion_handler(&pdev->dev,
 114                        ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
 115                        &chtdc_ti_pmic_opregion_data);
 116        if (err < 0)
 117                return err;
 118
 119        /* Re-enumerate devices depending on PMIC */
 120        acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
 121        return 0;
 122}
 123
 124static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
 125        { .name = "chtdc_ti_region" },
 126        {},
 127};
 128
 129static struct platform_driver chtdc_ti_pmic_opregion_driver = {
 130        .probe = chtdc_ti_pmic_opregion_probe,
 131        .driver = {
 132                .name = "cht_dollar_cove_ti_pmic",
 133        },
 134        .id_table = chtdc_ti_pmic_opregion_id_table,
 135};
 136builtin_platform_driver(chtdc_ti_pmic_opregion_driver);
 137