LXR uboot/drivers/power/pmic/pfuze100.c

   1/*
   2 * Copyright (C) 2015 Freescale Semiconductor, Inc
   3 * Peng Fan <Peng.Fan@freescale.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/pfuze100_pmic.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19static const struct pmic_child_info pmic_children_info[] = {
  20        /* sw[x], swbst */
  21        { .prefix = "s", .driver = PFUZE100_REGULATOR_DRIVER },
  22        /* vgen[x], vsnvs, vcc, v33, vcc_sd */
  23        { .prefix = "v", .driver = PFUZE100_REGULATOR_DRIVER },
  24        { },
  25};
  26
  27static int pfuze100_reg_count(struct udevice *dev)
  28{
  29        return PFUZE100_NUM_OF_REGS;
  30}
  31
  32static int pfuze100_write(struct udevice *dev, uint reg, const uint8_t *buff,
  33                          int len)
  34{
  35        if (dm_i2c_write(dev, reg, buff, len)) {
  36                error("write error to device: %p register: %#x!", dev, reg);
  37                return -EIO;
  38        }
  39
  40        return 0;
  41}
  42
  43static int pfuze100_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  44{
  45        if (dm_i2c_read(dev, reg, buff, len)) {
  46                error("read error from device: %p register: %#x!", dev, reg);
  47                return -EIO;
  48        }
  49
  50        return 0;
  51}
  52
  53static int pfuze100_bind(struct udevice *dev)
  54{
  55        int children;
  56        int regulators_node;
  57        const void *blob = gd->fdt_blob;
  58
  59        regulators_node = fdt_subnode_offset(blob, dev->of_offset,
  60                                             "regulators");
  61        if (regulators_node <= 0) {
  62                debug("%s: %s regulators subnode not found!", __func__,
  63                      dev->name);
  64                return -ENXIO;
  65        }
  66
  67        debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  68
  69        children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  70        if (!children)
  71                debug("%s: %s - no child found\n", __func__, dev->name);
  72
  73        /* Always return success for this device */
  74        return 0;
  75}
  76
  77static struct dm_pmic_ops pfuze100_ops = {
  78        .reg_count = pfuze100_reg_count,
  79        .read = pfuze100_read,
  80        .write = pfuze100_write,
  81};
  82
  83static const struct udevice_id pfuze100_ids[] = {
  84        { .compatible = "fsl,pfuze100", .data = PFUZE100, },
  85        { .compatible = "fsl,pfuze200", .data = PFUZE200, },
  86        { .compatible = "fsl,pfuze3000", .data = PFUZE3000, },
  87        { }
  88};
  89
  90U_BOOT_DRIVER(pmic_pfuze100) = {
  91        .name = "pfuze100 pmic",
  92        .id = UCLASS_PMIC,
  93        .of_match = pfuze100_ids,
  94        .bind = pfuze100_bind,
  95        .ops = &pfuze100_ops,
  96};
  97