LXR uboot/drivers/power/domain/power-domain-uclass.c

   1/*
   2 * Copyright (c) 2016, NVIDIA CORPORATION.
   3 *
   4 * SPDX-License-Identifier: GPL-2.0
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <fdtdec.h>
  10#include <power-domain.h>
  11#include <power-domain-uclass.h>
  12
  13DECLARE_GLOBAL_DATA_PTR;
  14
  15static inline struct power_domain_ops *power_domain_dev_ops(struct udevice *dev)
  16{
  17        return (struct power_domain_ops *)dev->driver->ops;
  18}
  19
  20static int power_domain_of_xlate_default(struct power_domain *power_domain,
  21                                       struct fdtdec_phandle_args *args)
  22{
  23        debug("%s(power_domain=%p)\n", __func__, power_domain);
  24
  25        if (args->args_count != 1) {
  26                debug("Invalid args_count: %d\n", args->args_count);
  27                return -EINVAL;
  28        }
  29
  30        power_domain->id = args->args[0];
  31
  32        return 0;
  33}
  34
  35int power_domain_get(struct udevice *dev, struct power_domain *power_domain)
  36{
  37        struct fdtdec_phandle_args args;
  38        int ret;
  39        struct udevice *dev_power_domain;
  40        struct power_domain_ops *ops;
  41
  42        debug("%s(dev=%p, power_domain=%p)\n", __func__, dev, power_domain);
  43
  44        ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
  45                                             "power-domains",
  46                                             "#power-domain-cells", 0, 0,
  47                                             &args);
  48        if (ret) {
  49                debug("%s: fdtdec_parse_phandle_with_args failed: %d\n",
  50                      __func__, ret);
  51                return ret;
  52        }
  53
  54        ret = uclass_get_device_by_of_offset(UCLASS_POWER_DOMAIN, args.node,
  55                                             &dev_power_domain);
  56        if (ret) {
  57                debug("%s: uclass_get_device_by_of_offset failed: %d\n",
  58                      __func__, ret);
  59                return ret;
  60        }
  61        ops = power_domain_dev_ops(dev_power_domain);
  62
  63        power_domain->dev = dev_power_domain;
  64        if (ops->of_xlate)
  65                ret = ops->of_xlate(power_domain, &args);
  66        else
  67                ret = power_domain_of_xlate_default(power_domain, &args);
  68        if (ret) {
  69                debug("of_xlate() failed: %d\n", ret);
  70                return ret;
  71        }
  72
  73        ret = ops->request(power_domain);
  74        if (ret) {
  75                debug("ops->request() failed: %d\n", ret);
  76                return ret;
  77        }
  78
  79        return 0;
  80}
  81
  82int power_domain_free(struct power_domain *power_domain)
  83{
  84        struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
  85
  86        debug("%s(power_domain=%p)\n", __func__, power_domain);
  87
  88        return ops->free(power_domain);
  89}
  90
  91int power_domain_on(struct power_domain *power_domain)
  92{
  93        struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
  94
  95        debug("%s(power_domain=%p)\n", __func__, power_domain);
  96
  97        return ops->on(power_domain);
  98}
  99
 100int power_domain_off(struct power_domain *power_domain)
 101{
 102        struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
 103
 104        debug("%s(power_domain=%p)\n", __func__, power_domain);
 105
 106        return ops->off(power_domain);
 107}
 108
 109UCLASS_DRIVER(power_domain) = {
 110        .id             = UCLASS_POWER_DOMAIN,
 111        .name           = "power_domain",
 112};
 113