LXR uboot/drivers/power/pmic/s2mps11.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 *  Copyright (C) 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/s2mps11.h>
  15
  16static const struct pmic_child_info pmic_children_info[] = {
  17        { .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER },
  18        { .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER },
  19        { },
  20};
  21
  22static int s2mps11_reg_count(struct udevice *dev)
  23{
  24        return S2MPS11_REG_COUNT;
  25}
  26
  27static int s2mps11_write(struct udevice *dev, uint reg, const uint8_t *buff,
  28                         int len)
  29{
  30        int ret;
  31
  32        ret = dm_i2c_write(dev, reg, buff, len);
  33        if (ret)
  34                pr_err("write error to device: %p register: %#x!\n", dev, reg);
  35
  36        return ret;
  37}
  38
  39static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  40{
  41        int ret;
  42
  43        ret = dm_i2c_read(dev, reg, buff, len);
  44        if (ret)
  45                pr_err("read error from device: %p register: %#x!\n", dev, reg);
  46
  47        return ret;
  48}
  49
  50static int s2mps11_probe(struct udevice *dev)
  51{
  52        ofnode regulators_node;
  53        int children;
  54
  55        regulators_node = dev_read_subnode(dev, "voltage-regulators");
  56        if (!ofnode_valid(regulators_node)) {
  57                debug("%s: %s regulators subnode not found!\n", __func__,
  58                      dev->name);
  59                return -ENXIO;
  60        }
  61
  62        debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  63
  64        children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  65        if (!children)
  66                debug("%s: %s - no child found\n", __func__, dev->name);
  67
  68        return 0;
  69}
  70
  71static struct dm_pmic_ops s2mps11_ops = {
  72        .reg_count = s2mps11_reg_count,
  73        .read = s2mps11_read,
  74        .write = s2mps11_write,
  75};
  76
  77static const struct udevice_id s2mps11_ids[] = {
  78        { .compatible = "samsung,s2mps11-pmic" },
  79        { }
  80};
  81
  82U_BOOT_DRIVER(pmic_s2mps11) = {
  83        .name = "s2mps11_pmic",
  84        .id = UCLASS_PMIC,
  85        .of_match = s2mps11_ids,
  86        .ops = &s2mps11_ops,
  87        .probe = s2mps11_probe,
  88};
  89