LXR uboot/drivers/power/pmic/max77686.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 *  Copyright (C) 2014-2015 Samsung Electronics
   4 *  Przemyslaw Marczak  <p.marczak@samsung.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/max77686_pmic.h>
  16
  17static const struct pmic_child_info pmic_children_info[] = {
  18        { .prefix = "LDO", .driver = MAX77686_LDO_DRIVER },
  19        { .prefix = "BUCK", .driver = MAX77686_BUCK_DRIVER },
  20        { },
  21};
  22
  23static int max77686_reg_count(struct udevice *dev)
  24{
  25        return MAX77686_NUM_OF_REGS;
  26}
  27
  28static int max77686_write(struct udevice *dev, uint reg, const uint8_t *buff,
  29                          int len)
  30{
  31        if (dm_i2c_write(dev, reg, buff, len)) {
  32                pr_err("write error to device: %p register: %#x!\n", dev, reg);
  33                return -EIO;
  34        }
  35
  36        return 0;
  37}
  38
  39static int max77686_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  40{
  41        if (dm_i2c_read(dev, reg, buff, len)) {
  42                pr_err("read error from device: %p register: %#x!\n", dev, reg);
  43                return -EIO;
  44        }
  45
  46        return 0;
  47}
  48
  49static int max77686_bind(struct udevice *dev)
  50{
  51        ofnode regulators_node;
  52        int children;
  53
  54        regulators_node = dev_read_subnode(dev, "voltage-regulators");
  55        if (!ofnode_valid(regulators_node)) {
  56                debug("%s: %s regulators subnode not found!\n", __func__,
  57                      dev->name);
  58                return -ENXIO;
  59        }
  60
  61        debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  62
  63        children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  64        if (!children)
  65                debug("%s: %s - no child found\n", __func__, dev->name);
  66
  67        /* Always return success for this device */
  68        return 0;
  69}
  70
  71static struct dm_pmic_ops max77686_ops = {
  72        .reg_count = max77686_reg_count,
  73        .read = max77686_read,
  74        .write = max77686_write,
  75};
  76
  77static const struct udevice_id max77686_ids[] = {
  78        { .compatible = "maxim,max77686" },
  79        { }
  80};
  81
  82U_BOOT_DRIVER(pmic_max77686) = {
  83        .name = "max77686_pmic",
  84        .id = UCLASS_PMIC,
  85        .of_match = max77686_ids,
  86        .bind = max77686_bind,
  87        .ops = &max77686_ops,
  88};
  89