LXR uboot/drivers/power/pmic/act8846.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 <log.h>
  12#include <linux/libfdt.h>
  13#include <power/act8846_pmic.h>
  14#include <power/pmic.h>
  15
  16static const struct pmic_child_info pmic_children_info[] = {
  17        { .prefix = "REG", .driver = "act8846_reg"},
  18        { },
  19};
  20
  21static int act8846_reg_count(struct udevice *dev)
  22{
  23        return ACT8846_NUM_OF_REGS;
  24}
  25
  26static int act8846_write(struct udevice *dev, uint reg, const uint8_t *buff,
  27                          int len)
  28{
  29        if (dm_i2c_write(dev, reg, buff, len)) {
  30                debug("write error to device: %p register: %#x!\n", dev, reg);
  31                return -EIO;
  32        }
  33
  34        return 0;
  35}
  36
  37static int act8846_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  38{
  39        if (dm_i2c_read(dev, reg, buff, len)) {
  40                debug("read error from device: %p register: %#x!\n", dev, reg);
  41                return -EIO;
  42        }
  43
  44        return 0;
  45}
  46
  47static int act8846_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!\n", __func__,
  55                      dev->name);
  56                return -ENXIO;
  57        }
  58
  59        debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  60
  61        children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  62        if (!children)
  63                debug("%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 act8846_ops = {
  70        .reg_count = act8846_reg_count,
  71        .read = act8846_read,
  72        .write = act8846_write,
  73};
  74
  75static const struct udevice_id act8846_ids[] = {
  76        { .compatible = "active-semi,act8846" },
  77        { }
  78};
  79
  80U_BOOT_DRIVER(pmic_act8846) = {
  81        .name = "act8846 pmic",
  82        .id = UCLASS_PMIC,
  83        .of_match = act8846_ids,
  84        .bind = act8846_bind,
  85        .ops = &act8846_ops,
  86};
  87