drivers/power/regulator/tps62360_regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
   4  *      Tero Kristo <t-kristo@ti.com>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <i2c.h>
  10 #include <dm/device_compat.h>
  11 #include <power/regulator.h>
  12
  13 #define TPS62360_REG_SET0       0
  14
  15 #define TPS62360_I2C_CHIP       0x60
  16
  17 #define TPS62360_VSEL_STEPSIZE  10000 /* In uV */
  18
  19 struct tps62360_regulator_config {
  20         u32 vmin;
  21         u32 vmax;
  22 };
  23
  24 struct tps62360_regulator_pdata {
  25         u8 vsel_offset;
  26         struct udevice *i2c;
  27         struct tps62360_regulator_config *config;
  28 };
  29
  30 /*
  31  * TPS62362/TPS62363 are just re-using these values for now, their preset
  32  * voltage values are just different compared to TPS62360/TPS62361.
  33  */
  34 static struct tps62360_regulator_config tps62360_data = {
  35         .vmin = 770000,
  36         .vmax = 1400000,
  37 };
  38
  39 static struct tps62360_regulator_config tps62361_data = {
  40         .vmin = 500000,
  41         .vmax = 1770000,
  42 };
  43
  44 static int tps62360_regulator_set_value(struct udevice *dev, int uV)
  45 {
  46         struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
  47         u8 regval;
  48
  49         if (uV < pdata->config->vmin || uV > pdata->config->vmax)
  50                 return -EINVAL;
  51
  52         uV -= pdata->config->vmin;
  53
  54         uV = DIV_ROUND_UP(uV, TPS62360_VSEL_STEPSIZE);
  55
  56         if (uV > U8_MAX)
  57                 return -EINVAL;
  58
  59         regval = (u8)uV;
  60
  61         return dm_i2c_write(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
  62                             &regval, 1);
  63 }
  64
  65 static int tps62360_regulator_get_value(struct udevice *dev)
  66 {
  67         u8 regval;
  68         int ret;
  69         struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
  70
  71         ret = dm_i2c_read(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
  72                           &regval, 1);
  73         if (ret) {
  74                 dev_err(dev, "i2c read failed: %d\n", ret);
  75                 return ret;
  76         }
  77
  78         return (u32)regval * TPS62360_VSEL_STEPSIZE + pdata->config->vmin;
  79 }
  80
  81 static int tps62360_regulator_probe(struct udevice *dev)
  82 {
  83         struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
  84         u8 vsel0;
  85         u8 vsel1;
  86         int ret;
  87
  88         pdata->config = (void *)dev_get_driver_data(dev);
  89
  90         vsel0 = dev_read_bool(dev, "ti,vsel0-state-high");
  91         vsel1 = dev_read_bool(dev, "ti,vsel1-state-high");
  92
  93         pdata->vsel_offset = vsel0 + vsel1 * 2;
  94
  95         ret = i2c_get_chip(dev->parent, TPS62360_I2C_CHIP, 1, &pdata->i2c);
  96         if (ret) {
  97                 dev_err(dev, "i2c dev get failed.\n");
  98                 return ret;
  99         }
 100
 101         return 0;
 102 }
 103
 104 static const struct dm_regulator_ops tps62360_regulator_ops = {
 105         .get_value  = tps62360_regulator_get_value,
 106         .set_value  = tps62360_regulator_set_value,
 107 };
 108
 109 static const struct udevice_id tps62360_regulator_ids[] = {
 110         { .compatible = "ti,tps62360", .data = (ulong)&tps62360_data },
 111         { .compatible = "ti,tps62361", .data = (ulong)&tps62361_data },
 112         { .compatible = "ti,tps62362", .data = (ulong)&tps62360_data },
 113         { .compatible = "ti,tps62363", .data = (ulong)&tps62361_data },
 114         { },
 115 };
 116
 117 U_BOOT_DRIVER(tps62360_regulator) = {
 118         .name = "tps62360_regulator",
 119         .id = UCLASS_REGULATOR,
 120         .ops = &tps62360_regulator_ops,
 121         .of_match = tps62360_regulator_ids,
 122         .platdata_auto_alloc_size = sizeof(struct tps62360_regulator_pdata),
 123         .probe = tps62360_regulator_probe,
 124 };