drivers/acpi/pmic/intel_pmic_chtdc_ti.c

   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
  21 static 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
  37 static 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
  67 static 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
  79 static 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
  85 static 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
  96 static 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
 106 static 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
 122 static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
 123         { .name = "chtdc_ti_region" },
 124         {},
 125 };
 126
 127 static 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 };
 134 builtin_platform_driver(chtdc_ti_pmic_opregion_driver);