drivers/acpi/pmic/intel_pmic_chtdc_ti.c

   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
  22 static 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
  38 static 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
  68 static 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
  80 static 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
  86 static 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
  97 static 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 };
 106
 107 static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
 108 {
 109         struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
 110         int err;
 111
 112         err = intel_pmic_install_opregion_handler(&pdev->dev,
 113                         ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
 114                         &chtdc_ti_pmic_opregion_data);
 115         if (err < 0)
 116                 return err;
 117
 118         /* Re-enumerate devices depending on PMIC */
 119         acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
 120         return 0;
 121 }
 122
 123 static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
 124         { .name = "chtdc_ti_region" },
 125         {},
 126 };
 127
 128 static struct platform_driver chtdc_ti_pmic_opregion_driver = {
 129         .probe = chtdc_ti_pmic_opregion_probe,
 130         .driver = {
 131                 .name = "cht_dollar_cove_ti_pmic",
 132         },
 133         .id_table = chtdc_ti_pmic_opregion_id_table,
 134 };
 135 builtin_platform_driver(chtdc_ti_pmic_opregion_driver);