drivers/acpi/pmic/intel_pmic_xpower.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * XPower AXP288 PMIC operation region driver
   4  *
   5  * Copyright (C) 2014 Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/acpi.h>
   9 #include <linux/init.h>
  10 #include <linux/mfd/axp20x.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/regmap.h>
  13 #include "intel_pmic.h"
  14
  15 #define XPOWER_GPADC_LOW        0x5b
  16 #define XPOWER_GPI1_CTRL        0x92
  17
  18 #define GPI1_LDO_MASK           GENMASK(2, 0)
  19 #define GPI1_LDO_ON             (3 << 0)
  20 #define GPI1_LDO_OFF            (4 << 0)
  21
  22 #define AXP288_ADC_TS_PIN_GPADC 0xf2
  23 #define AXP288_ADC_TS_PIN_ON    0xf3
  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                 .address = 0x4c,
 123                 .reg = 0x92,
 124         }, /* GPI1 */
 125 };
 126
 127 /* TMP0 - TMP5 are the same, all from GPADC */
 128 static struct pmic_table thermal_table[] = {
 129         {
 130                 .address = 0x00,
 131                 .reg = XPOWER_GPADC_LOW
 132         },
 133         {
 134                 .address = 0x0c,
 135                 .reg = XPOWER_GPADC_LOW
 136         },
 137         {
 138                 .address = 0x18,
 139                 .reg = XPOWER_GPADC_LOW
 140         },
 141         {
 142                 .address = 0x24,
 143                 .reg = XPOWER_GPADC_LOW
 144         },
 145         {
 146                 .address = 0x30,
 147                 .reg = XPOWER_GPADC_LOW
 148         },
 149         {
 150                 .address = 0x3c,
 151                 .reg = XPOWER_GPADC_LOW
 152         },
 153 };
 154
 155 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
 156                                        int bit, u64 *value)
 157 {
 158         int data;
 159
 160         if (regmap_read(regmap, reg, &data))
 161                 return -EIO;
 162
 163         /* GPIO1 LDO regulator needs special handling */
 164         if (reg == XPOWER_GPI1_CTRL)
 165                 *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
 166         else
 167                 *value = (data & BIT(bit)) ? 1 : 0;
 168
 169         return 0;
 170 }
 171
 172 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
 173                                           int bit, bool on)
 174 {
 175         int data;
 176
 177         /* GPIO1 LDO regulator needs special handling */
 178         if (reg == XPOWER_GPI1_CTRL)
 179                 return regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
 180                                           on ? GPI1_LDO_ON : GPI1_LDO_OFF);
 181
 182         if (regmap_read(regmap, reg, &data))
 183                 return -EIO;
 184
 185         if (on)
 186                 data |= BIT(bit);
 187         else
 188                 data &= ~BIT(bit);
 189
 190         if (regmap_write(regmap, reg, data))
 191                 return -EIO;
 192
 193         return 0;
 194 }
 195
 196 /**
 197  * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
 198  *
 199  * @regmap: regmap of the PMIC device
 200  * @reg: register to get the reading
 201  *
 202  * Return a positive value on success, errno on failure.
 203  */
 204 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
 205 {
 206         u8 buf[2];
 207         int ret;
 208
 209         ret = regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL,
 210                            AXP288_ADC_TS_PIN_GPADC);
 211         if (ret)
 212                 return ret;
 213
 214         /* After switching to the GPADC pin give things some time to settle */
 215         usleep_range(6000, 10000);
 216
 217         ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
 218         if (ret == 0)
 219                 ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
 220
 221         regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_PIN_ON);
 222
 223         return ret;
 224 }
 225
 226 static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
 227         .get_power = intel_xpower_pmic_get_power,
 228         .update_power = intel_xpower_pmic_update_power,
 229         .get_raw_temp = intel_xpower_pmic_get_raw_temp,
 230         .power_table = power_table,
 231         .power_table_count = ARRAY_SIZE(power_table),
 232         .thermal_table = thermal_table,
 233         .thermal_table_count = ARRAY_SIZE(thermal_table),
 234 };
 235
 236 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
 237                 acpi_physical_address address, u32 bit_width, u64 *value,
 238                 void *handler_context, void *region_context)
 239 {
 240         return AE_OK;
 241 }
 242
 243 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
 244 {
 245         struct device *parent = pdev->dev.parent;
 246         struct axp20x_dev *axp20x = dev_get_drvdata(parent);
 247         acpi_status status;
 248         int result;
 249
 250         status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
 251                         ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
 252                         NULL, NULL);
 253         if (ACPI_FAILURE(status))
 254                 return -ENODEV;
 255
 256         result = intel_pmic_install_opregion_handler(&pdev->dev,
 257                                         ACPI_HANDLE(parent), axp20x->regmap,
 258                                         &intel_xpower_pmic_opregion_data);
 259         if (result)
 260                 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
 261                                                   ACPI_ADR_SPACE_GPIO,
 262                                                   intel_xpower_pmic_gpio_handler);
 263
 264         return result;
 265 }
 266
 267 static struct platform_driver intel_xpower_pmic_opregion_driver = {
 268         .probe = intel_xpower_pmic_opregion_probe,
 269         .driver = {
 270                 .name = "axp288_pmic_acpi",
 271         },
 272 };
 273 builtin_platform_driver(intel_xpower_pmic_opregion_driver);