LXR uboot/drivers/power/pmic/fan53555.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) 2018 Theobroma Systems Design und Consulting GmbH
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <log.h>
   9#include <dm/device-internal.h>
  10#include <dm/device_compat.h>
  11#include <dm/lists.h>
  12#include <i2c.h>
  13#include <power/fan53555.h>
  14#include <power/pmic.h>
  15#include <power/regulator.h>
  16
  17static int pmic_fan53555_reg_count(struct udevice *dev)
  18{
  19        return 1;
  20};
  21
  22static int pmic_fan53555_read(struct udevice *dev, uint reg,
  23                              u8 *buff, int len)
  24{
  25        if (dm_i2c_read(dev, reg, buff, len)) {
  26                pr_err("%s: read error for register: %#x!", dev->name, reg);
  27                return -EIO;
  28        }
  29
  30        return 0;
  31}
  32
  33static int pmic_fan53555_write(struct udevice *dev, uint reg,
  34                               const u8 *buff, int len)
  35{
  36        if (dm_i2c_write(dev, reg, buff, len)) {
  37                pr_err("%s: write error for register: %#x!", dev->name, reg);
  38                return -EIO;
  39        }
  40
  41        return 0;
  42}
  43
  44static int pmic_fan53555_bind(struct udevice *dev)
  45{
  46        /*
  47         * The FAN53555 has only a single regulator and therefore doesn't
  48         * have a subnode.  So we have to rebind a child device (the one
  49         * regulator) here.
  50         */
  51
  52        const char *regulator_driver_name = "fan53555_regulator";
  53        struct udevice *child;
  54        struct driver *drv;
  55
  56        debug("%s\n", __func__);
  57
  58        drv = lists_driver_lookup_name(regulator_driver_name);
  59        if (!drv) {
  60                dev_err(dev, "no driver '%s'\n", regulator_driver_name);
  61                return -ENOENT;
  62        }
  63
  64        return device_bind_with_driver_data(dev, drv, "SW", dev->driver_data,
  65                                            dev_ofnode(dev), &child);
  66};
  67
  68static struct dm_pmic_ops pmic_fan53555_ops = {
  69        .reg_count = pmic_fan53555_reg_count,
  70        .read = pmic_fan53555_read,
  71        .write = pmic_fan53555_write,
  72};
  73
  74static const struct udevice_id pmic_fan53555_match[] = {
  75        { .compatible = "fcs,fan53555", .data = FAN53555_VENDOR_FAIRCHILD, },
  76        { .compatible = "silergy,syr827", .data = FAN53555_VENDOR_SILERGY, },
  77        { .compatible = "silergy,syr828", .data = FAN53555_VENDOR_SILERGY, },
  78        { },
  79};
  80
  81U_BOOT_DRIVER(pmic_fan53555) = {
  82        .name = "pmic_fan53555",
  83        .id = UCLASS_PMIC,
  84        .of_match = pmic_fan53555_match,
  85        .bind = pmic_fan53555_bind,
  86        .ops = &pmic_fan53555_ops,
  87};
  88