drivers/power/pmic/tps65090.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2015 Google, Inc
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <fdtdec.h>
  11 #include <i2c.h>
  12 #include <power/pmic.h>
  13 #include <power/tps65090.h>
  14
  15 static const struct pmic_child_info pmic_children_info[] = {
  16         { .prefix = "fet", .driver = TPS65090_FET_DRIVER },
  17         { },
  18 };
  19
  20 static int tps65090_reg_count(struct udevice *dev)
  21 {
  22         return TPS65090_NUM_REGS;
  23 }
  24
  25 static int tps65090_write(struct udevice *dev, uint reg, const uint8_t *buff,
  26                           int len)
  27 {
  28         if (dm_i2c_write(dev, reg, buff, len)) {
  29                 pr_err("write error to device: %p register: %#x!\n", dev, reg);
  30                 return -EIO;
  31         }
  32
  33         return 0;
  34 }
  35
  36 static int tps65090_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  37 {
  38         int ret;
  39
  40         ret = dm_i2c_read(dev, reg, buff, len);
  41         if (ret) {
  42                 pr_err("read error %d from device: %p register: %#x!\n", ret,
  43                        dev, reg);
  44                 return -EIO;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static int tps65090_bind(struct udevice *dev)
  51 {
  52         ofnode regulators_node;
  53         int children;
  54
  55         regulators_node = dev_read_subnode(dev, "regulators");
  56         if (!ofnode_valid(regulators_node)) {
  57                 debug("%s: %s regulators subnode not found!\n", __func__,
  58                       dev->name);
  59                 return -ENXIO;
  60         }
  61
  62         debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  63
  64         children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  65         if (!children)
  66                 debug("%s: %s - no child found\n", __func__, dev->name);
  67
  68         /* Always return success for this device */
  69         return 0;
  70 }
  71
  72 static struct dm_pmic_ops tps65090_ops = {
  73         .reg_count = tps65090_reg_count,
  74         .read = tps65090_read,
  75         .write = tps65090_write,
  76 };
  77
  78 static const struct udevice_id tps65090_ids[] = {
  79         { .compatible = "ti,tps65090" },
  80         { }
  81 };
  82
  83 U_BOOT_DRIVER(pmic_tps65090) = {
  84         .name = "tps65090 pmic",
  85         .id = UCLASS_PMIC,
  86         .of_match = tps65090_ids,
  87         .bind = tps65090_bind,
  88         .ops = &tps65090_ops,
  89 };