LXR uboot/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
  18DECLARE_GLOBAL_DATA_PTR;
  19
  20static 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
  26static 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                error("write error to device: %p register: %#x!", dev, reg);
  31                return -EIO;
  32        }
  33
  34        return 0;
  35}
  36
  37static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  38{
  39        if (dm_i2c_read(dev, reg, buff, len)) {
  40                error("read error from device: %p register: %#x!", dev, reg);
  41                return -EIO;
  42        }
  43
  44        return 0;
  45}
  46
  47static int lp873x_bind(struct udevice *dev)
  48{
  49        int regulators_node;
  50        const void *blob = gd->fdt_blob;
  51        int children;
  52        int node = dev->of_offset;
  53
  54        regulators_node = fdt_subnode_offset(blob, node, "regulators");
  55
  56        if (regulators_node <= 0) {
  57                printf("%s: %s reg subnode not found!", __func__, dev->name);
  58                return -ENXIO;
  59        }
  60
  61        children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  62        if (!children)
  63                printf("%s: %s - no child found\n", __func__, dev->name);
  64
  65        /* Always return success for this device */
  66        return 0;
  67}
  68
  69static struct dm_pmic_ops lp873x_ops = {
  70        .read = lp873x_read,
  71        .write = lp873x_write,
  72};
  73
  74static const struct udevice_id lp873x_ids[] = {
  75        { .compatible = "ti,lp8732", .data = LP8732 },
  76        { .compatible = "ti,lp8733" , .data = LP8733 },
  77        { }
  78};
  79
  80U_BOOT_DRIVER(pmic_lp873x) = {
  81        .name = "lp873x_pmic",
  82        .id = UCLASS_PMIC,
  83        .of_match = lp873x_ids,
  84        .bind = lp873x_bind,
  85        .ops = &lp873x_ops,
  86};
  87