LXR uboot/drivers/power/pmic/tps65941.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2019 Texas Instruments Incorporated, <www.ti.com>
   4 * Keerthy <j-keerthy@ti.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/tps65941.h>
  16#include <dm/device.h>
  17
  18static const struct pmic_child_info pmic_children_info[] = {
  19        { .prefix = "ldo", .driver = TPS65941_LDO_DRIVER },
  20        { .prefix = "buck", .driver = TPS65941_BUCK_DRIVER },
  21        { },
  22};
  23
  24static int tps65941_write(struct udevice *dev, uint reg, const uint8_t *buff,
  25                          int len)
  26{
  27        if (dm_i2c_write(dev, reg, buff, len)) {
  28                pr_err("write error to device: %p register: %#x!\n", dev, reg);
  29                return -EIO;
  30        }
  31
  32        return 0;
  33}
  34
  35static int tps65941_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  36{
  37        if (dm_i2c_read(dev, reg, buff, len)) {
  38                pr_err("read error from device: %p register: %#x!\n", dev, reg);
  39                return -EIO;
  40        }
  41
  42        return 0;
  43}
  44
  45static int tps65941_bind(struct udevice *dev)
  46{
  47        ofnode regulators_node;
  48        int children;
  49
  50        regulators_node = dev_read_subnode(dev, "regulators");
  51        if (!ofnode_valid(regulators_node)) {
  52                debug("%s: %s regulators subnode not found!\n", __func__,
  53                      dev->name);
  54                return -ENXIO;
  55        }
  56
  57        debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  58
  59        children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  60        if (!children)
  61                printf("%s: %s - no child found\n", __func__, dev->name);
  62
  63        /* Probe all the child devices */
  64        return dm_scan_fdt_dev(dev);
  65}
  66
  67static struct dm_pmic_ops tps65941_ops = {
  68        .read = tps65941_read,
  69        .write = tps65941_write,
  70};
  71
  72static const struct udevice_id tps65941_ids[] = {
  73        { .compatible = "ti,tps659411", .data = TPS659411 },
  74        { .compatible = "ti,tps659413", .data = TPS659413 },
  75        { .compatible = "ti,lp876441",  .data =  LP876441 },
  76        { }
  77};
  78
  79U_BOOT_DRIVER(pmic_tps65941) = {
  80        .name = "tps65941_pmic",
  81        .id = UCLASS_PMIC,
  82        .of_match = tps65941_ids,
  83        .bind = tps65941_bind,
  84        .ops = &tps65941_ops,
  85};
  86