drivers/power/pmic/lp87565.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2017 Texas Instruments Incorporated, <www.ti.com>
   4  * Keerthy <j-keerthy@ti.com>
   5  */
   6
   7 #include <common.h>
   8 #include <fdtdec.h>
   9 #include <errno.h>
  10 #include <dm.h>
  11 #include <i2c.h>
  12 #include <log.h>
  13 #include <power/pmic.h>
  14 #include <power/regulator.h>
  15 #include <power/lp87565.h>
  16 #include <dm/device.h>
  17
  18 static const struct pmic_child_info pmic_children_info[] = {
  19         { .prefix = "buck", .driver = LP87565_BUCK_DRIVER },
  20         { },
  21 };
  22
  23 static int lp87565_write(struct udevice *dev, uint reg, const uint8_t *buff,
  24                           int len)
  25 {
  26         int ret;
  27
  28         ret = dm_i2c_write(dev, reg, buff, len);
  29         if (ret)
  30                 pr_err("write error to device: %p register: %#x!\n", dev, reg);
  31
  32         return ret;
  33 }
  34
  35 static int lp87565_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  36 {
  37         int ret;
  38
  39         ret = dm_i2c_read(dev, reg, buff, len);
  40         if (ret)
  41                 pr_err("read error from device: %p register: %#x!\n", dev, reg);
  42
  43         return ret;
  44 }
  45
  46 static int lp87565_bind(struct udevice *dev)
  47 {
  48         ofnode regulators_node;
  49         int children;
  50
  51         regulators_node = dev_read_subnode(dev, "regulators");
  52         if (!ofnode_valid(regulators_node)) {
  53                 debug("%s: %s regulators subnode not found!\n", __func__,
  54                       dev->name);
  55                 return -ENXIO;
  56         }
  57
  58         debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  59
  60         children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  61         if (!children)
  62                 printf("%s: %s - no child found\n", __func__, dev->name);
  63
  64         /* Always return success for this device */
  65         return 0;
  66 }
  67
  68 static struct dm_pmic_ops lp87565_ops = {
  69         .read = lp87565_read,
  70         .write = lp87565_write,
  71 };
  72
  73 static const struct udevice_id lp87565_ids[] = {
  74         { .compatible = "ti,lp87565", .data = LP87565 },
  75         { .compatible = "ti,lp87565-q1", .data = LP87565_Q1 },
  76         { }
  77 };
  78
  79 U_BOOT_DRIVER(pmic_lp87565) = {
  80         .name = "lp87565_pmic",
  81         .id = UCLASS_PMIC,
  82         .of_match = lp87565_ids,
  83         .bind = lp87565_bind,
  84         .ops = &lp87565_ops,
  85 };