LXR linux/drivers/acpi/pmic/intel_pmic_chtdc

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