drivers/power/pmic/lp873x.c

   1 /*
   2  * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
   3  * Keerthy <j-keerthy@ti.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <fdtdec.h>
  10 #include <errno.h>
  11 #include <dm.h>
  12 #include <i2c.h>
  13 #include <power/pmic.h>
  14 #include <power/regulator.h>
  15 #include <power/lp873x.h>
  16 #include <dm/device.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 static const struct pmic_child_info pmic_children_info[] = {
  21         { .prefix = "ldo", .driver = LP873X_LDO_DRIVER },
  22         { .prefix = "buck", .driver = LP873X_BUCK_DRIVER },
  23         { },
  24 };
  25
  26 static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff,
  27                           int len)
  28 {
  29         if (dm_i2c_write(dev, reg, buff, len)) {
  30                 pr_err("write error to device: %p register: %#x!", dev, reg);
  31                 return -EIO;
  32         }
  33
  34         return 0;
  35 }
  36
  37 static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  38 {
  39         if (dm_i2c_read(dev, reg, buff, len)) {
  40                 pr_err("read error from device: %p register: %#x!", dev, reg);
  41                 return -EIO;
  42         }
  43
  44         return 0;
  45 }
  46
  47 static int lp873x_bind(struct udevice *dev)
  48 {
  49         ofnode regulators_node;
  50         int children;
  51
  52         regulators_node = dev_read_subnode(dev, "regulators");
  53         if (!ofnode_valid(regulators_node)) {
  54                 debug("%s: %s regulators subnode not found!", __func__,
  55                       dev->name);
  56                 return -ENXIO;
  57         }
  58
  59         children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  60         if (!children)
  61                 printf("%s: %s - no child found\n", __func__, dev->name);
  62
  63         /* Always return success for this device */
  64         return 0;
  65 }
  66
  67 static struct dm_pmic_ops lp873x_ops = {
  68         .read = lp873x_read,
  69         .write = lp873x_write,
  70 };
  71
  72 static const struct udevice_id lp873x_ids[] = {
  73         { .compatible = "ti,lp8732", .data = LP8732 },
  74         { .compatible = "ti,lp8733" , .data = LP8733 },
  75         { }
  76 };
  77
  78 U_BOOT_DRIVER(pmic_lp873x) = {
  79         .name = "lp873x_pmic",
  80         .id = UCLASS_PMIC,
  81         .of_match = lp873x_ids,
  82         .bind = lp873x_bind,
  83         .ops = &lp873x_ops,
  84 };