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/bits.h>
  12 #include <linux/init.h>
  13 #include <linux/mfd/intel_soc_pmic.h>
  14 #include <linux/platform_device.h>
  15 #include <asm/byteorder.h>
  16 #include "intel_pmic.h"
  17
  18 /* registers stored in 16bit BE (high:low, total 10bit) */
  19 #define PMIC_REG_MASK           GENMASK(9, 0)
  20
  21 #define CHTDC_TI_VBAT           0x54
  22 #define CHTDC_TI_DIETEMP        0x56
  23 #define CHTDC_TI_BPTHERM        0x58
  24 #define CHTDC_TI_GPADC          0x5a
  25
  26 static const struct pmic_table chtdc_ti_power_table[] = {
  27         { .address = 0x00, .reg = 0x41 }, /* LDO1 */
  28         { .address = 0x04, .reg = 0x42 }, /* LDO2 */
  29         { .address = 0x08, .reg = 0x43 }, /* LDO3 */
  30         { .address = 0x0c, .reg = 0x45 }, /* LDO5 */
  31         { .address = 0x10, .reg = 0x46 }, /* LDO6 */
  32         { .address = 0x14, .reg = 0x47 }, /* LDO7 */
  33         { .address = 0x18, .reg = 0x48 }, /* LDO8 */
  34         { .address = 0x1c, .reg = 0x49 }, /* LDO9 */
  35         { .address = 0x20, .reg = 0x4a }, /* LD10 */
  36         { .address = 0x24, .reg = 0x4b }, /* LD11 */
  37         { .address = 0x28, .reg = 0x4c }, /* LD12 */
  38         { .address = 0x2c, .reg = 0x4d }, /* LD13 */
  39         { .address = 0x30, .reg = 0x4e }, /* LD14 */
  40 };
  41
  42 static const struct pmic_table chtdc_ti_thermal_table[] = {
  43         {
  44                 .address = 0x00,
  45                 .reg = CHTDC_TI_GPADC
  46         },
  47         {
  48                 .address = 0x0c,
  49                 .reg = CHTDC_TI_GPADC
  50         },
  51         /* TMP2 -> SYSTEMP */
  52         {
  53                 .address = 0x18,
  54                 .reg = CHTDC_TI_GPADC
  55         },
  56         /* TMP3 -> BPTHERM */
  57         {
  58                 .address = 0x24,
  59                 .reg = CHTDC_TI_BPTHERM
  60         },
  61         {
  62                 .address = 0x30,
  63                 .reg = CHTDC_TI_GPADC
  64         },
  65         /* TMP5 -> DIETEMP */
  66         {
  67                 .address = 0x3c,
  68                 .reg = CHTDC_TI_DIETEMP
  69         },
  70 };
  71
  72 static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
  73                                    u64 *value)
  74 {
  75         int data;
  76
  77         if (regmap_read(regmap, reg, &data))
  78                 return -EIO;
  79
  80         *value = data & BIT(0);
  81         return 0;
  82 }
  83
  84 static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
  85                                       bool on)
  86 {
  87         return regmap_update_bits(regmap, reg, 1, on);
  88 }
  89
  90 static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
  91 {
  92         __be16 buf;
  93
  94         if (regmap_bulk_read(regmap, reg, &buf, sizeof(buf)))
  95                 return -EIO;
  96
  97         return be16_to_cpu(buf) & PMIC_REG_MASK;
  98 }
  99
 100 static const struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {
 101         .get_power = chtdc_ti_pmic_get_power,
 102         .update_power = chtdc_ti_pmic_update_power,
 103         .get_raw_temp = chtdc_ti_pmic_get_raw_temp,
 104         .lpat_raw_to_temp = acpi_lpat_raw_to_temp,
 105         .power_table = chtdc_ti_power_table,
 106         .power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
 107         .thermal_table = chtdc_ti_thermal_table,
 108         .thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
 109         .pmic_i2c_address = 0x5e,
 110 };
 111
 112 static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
 113 {
 114         struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
 115         int err;
 116
 117         err = intel_pmic_install_opregion_handler(&pdev->dev,
 118                         ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
 119                         &chtdc_ti_pmic_opregion_data);
 120         if (err < 0)
 121                 return err;
 122
 123         /* Re-enumerate devices depending on PMIC */
 124         acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
 125         return 0;
 126 }
 127
 128 static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
 129         { .name = "chtdc_ti_region" },
 130         {},
 131 };
 132
 133 static struct platform_driver chtdc_ti_pmic_opregion_driver = {
 134         .probe = chtdc_ti_pmic_opregion_probe,
 135         .driver = {
 136                 .name = "cht_dollar_cove_ti_pmic",
 137         },
 138         .id_table = chtdc_ti_pmic_opregion_id_table,
 139 };
 140 builtin_platform_driver(chtdc_ti_pmic_opregion_driver);