drivers/acpi/pmic/intel_pmic_xpower.c

   1 /*
   2  * intel_pmic_xpower.c - XPower AXP288 PMIC operation region driver
   3  *
   4  * Copyright (C) 2014 Intel Corporation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/acpi.h>
  18 #include <linux/mfd/axp20x.h>
  19 #include <linux/regmap.h>
  20 #include <linux/platform_device.h>
  21 #include "intel_pmic.h"
  22
  23 #define XPOWER_GPADC_LOW        0x5b
  24
  25 static struct pmic_table power_table[] = {
  26         {
  27                 .address = 0x00,
  28                 .reg = 0x13,
  29                 .bit = 0x05,
  30         }, /* ALD1 */
  31         {
  32                 .address = 0x04,
  33                 .reg = 0x13,
  34                 .bit = 0x06,
  35         }, /* ALD2 */
  36         {
  37                 .address = 0x08,
  38                 .reg = 0x13,
  39                 .bit = 0x07,
  40         }, /* ALD3 */
  41         {
  42                 .address = 0x0c,
  43                 .reg = 0x12,
  44                 .bit = 0x03,
  45         }, /* DLD1 */
  46         {
  47                 .address = 0x10,
  48                 .reg = 0x12,
  49                 .bit = 0x04,
  50         }, /* DLD2 */
  51         {
  52                 .address = 0x14,
  53                 .reg = 0x12,
  54                 .bit = 0x05,
  55         }, /* DLD3 */
  56         {
  57                 .address = 0x18,
  58                 .reg = 0x12,
  59                 .bit = 0x06,
  60         }, /* DLD4 */
  61         {
  62                 .address = 0x1c,
  63                 .reg = 0x12,
  64                 .bit = 0x00,
  65         }, /* ELD1 */
  66         {
  67                 .address = 0x20,
  68                 .reg = 0x12,
  69                 .bit = 0x01,
  70         }, /* ELD2 */
  71         {
  72                 .address = 0x24,
  73                 .reg = 0x12,
  74                 .bit = 0x02,
  75         }, /* ELD3 */
  76         {
  77                 .address = 0x28,
  78                 .reg = 0x13,
  79                 .bit = 0x02,
  80         }, /* FLD1 */
  81         {
  82                 .address = 0x2c,
  83                 .reg = 0x13,
  84                 .bit = 0x03,
  85         }, /* FLD2 */
  86         {
  87                 .address = 0x30,
  88                 .reg = 0x13,
  89                 .bit = 0x04,
  90         }, /* FLD3 */
  91         {
  92                 .address = 0x34,
  93                 .reg = 0x10,
  94                 .bit = 0x03,
  95         }, /* BUC1 */
  96         {
  97                 .address = 0x38,
  98                 .reg = 0x10,
  99                 .bit = 0x06,
 100         }, /* BUC2 */
 101         {
 102                 .address = 0x3c,
 103                 .reg = 0x10,
 104                 .bit = 0x05,
 105         }, /* BUC3 */
 106         {
 107                 .address = 0x40,
 108                 .reg = 0x10,
 109                 .bit = 0x04,
 110         }, /* BUC4 */
 111         {
 112                 .address = 0x44,
 113                 .reg = 0x10,
 114                 .bit = 0x01,
 115         }, /* BUC5 */
 116         {
 117                 .address = 0x48,
 118                 .reg = 0x10,
 119                 .bit = 0x00
 120         }, /* BUC6 */
 121 };
 122
 123 /* TMP0 - TMP5 are the same, all from GPADC */
 124 static struct pmic_table thermal_table[] = {
 125         {
 126                 .address = 0x00,
 127                 .reg = XPOWER_GPADC_LOW
 128         },
 129         {
 130                 .address = 0x0c,
 131                 .reg = XPOWER_GPADC_LOW
 132         },
 133         {
 134                 .address = 0x18,
 135                 .reg = XPOWER_GPADC_LOW
 136         },
 137         {
 138                 .address = 0x24,
 139                 .reg = XPOWER_GPADC_LOW
 140         },
 141         {
 142                 .address = 0x30,
 143                 .reg = XPOWER_GPADC_LOW
 144         },
 145         {
 146                 .address = 0x3c,
 147                 .reg = XPOWER_GPADC_LOW
 148         },
 149 };
 150
 151 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
 152                                        int bit, u64 *value)
 153 {
 154         int data;
 155
 156         if (regmap_read(regmap, reg, &data))
 157                 return -EIO;
 158
 159         *value = (data & BIT(bit)) ? 1 : 0;
 160         return 0;
 161 }
 162
 163 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
 164                                           int bit, bool on)
 165 {
 166         int data;
 167
 168         if (regmap_read(regmap, reg, &data))
 169                 return -EIO;
 170
 171         if (on)
 172                 data |= BIT(bit);
 173         else
 174                 data &= ~BIT(bit);
 175
 176         if (regmap_write(regmap, reg, data))
 177                 return -EIO;
 178
 179         return 0;
 180 }
 181
 182 /**
 183  * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
 184  *
 185  * @regmap: regmap of the PMIC device
 186  * @reg: register to get the reading
 187  *
 188  * Return a positive value on success, errno on failure.
 189  */
 190 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
 191 {
 192         u8 buf[2];
 193
 194         if (regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2))
 195                 return -EIO;
 196
 197         return (buf[0] << 4) + ((buf[1] >> 4) & 0x0F);
 198 }
 199
 200 static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
 201         .get_power = intel_xpower_pmic_get_power,
 202         .update_power = intel_xpower_pmic_update_power,
 203         .get_raw_temp = intel_xpower_pmic_get_raw_temp,
 204         .power_table = power_table,
 205         .power_table_count = ARRAY_SIZE(power_table),
 206         .thermal_table = thermal_table,
 207         .thermal_table_count = ARRAY_SIZE(thermal_table),
 208 };
 209
 210 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
 211                 acpi_physical_address address, u32 bit_width, u64 *value,
 212                 void *handler_context, void *region_context)
 213 {
 214         return AE_OK;
 215 }
 216
 217 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
 218 {
 219         struct device *parent = pdev->dev.parent;
 220         struct axp20x_dev *axp20x = dev_get_drvdata(parent);
 221         acpi_status status;
 222         int result;
 223
 224         status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
 225                         ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
 226                         NULL, NULL);
 227         if (ACPI_FAILURE(status))
 228                 return -ENODEV;
 229
 230         result = intel_pmic_install_opregion_handler(&pdev->dev,
 231                                         ACPI_HANDLE(parent), axp20x->regmap,
 232                                         &intel_xpower_pmic_opregion_data);
 233         if (result)
 234                 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
 235                                                   ACPI_ADR_SPACE_GPIO,
 236                                                   intel_xpower_pmic_gpio_handler);
 237
 238         return result;
 239 }
 240
 241 static struct platform_driver intel_xpower_pmic_opregion_driver = {
 242         .probe = intel_xpower_pmic_opregion_probe,
 243         .driver = {
 244                 .name = "axp288_pmic_acpi",
 245         },
 246 };
 247
 248 static int __init intel_xpower_pmic_opregion_driver_init(void)
 249 {
 250         return platform_driver_register(&intel_xpower_pmic_opregion_driver);
 251 }
 252 device_initcall(intel_xpower_pmic_opregion_driver_init);