drivers/rtc/nvmem.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * RTC subsystem, nvmem interface
   4  *
   5  * Copyright (C) 2017 Alexandre Belloni
   6  */
   7
   8 #include <linux/err.h>
   9 #include <linux/types.h>
  10 #include <linux/nvmem-consumer.h>
  11 #include <linux/rtc.h>
  12
  13 int devm_rtc_nvmem_register(struct rtc_device *rtc,
  14                        struct nvmem_config *nvmem_config)
  15 {
  16         struct device *dev = rtc->dev.parent;
  17         struct nvmem_device *nvmem;
  18
  19         if (!nvmem_config)
  20                 return -ENODEV;
  21
  22         nvmem_config->dev = dev;
  23         nvmem_config->owner = rtc->owner;
  24         nvmem_config->add_legacy_fixed_of_cells = true;
  25         nvmem = devm_nvmem_register(dev, nvmem_config);
  26         if (IS_ERR(nvmem))
  27                 dev_err(dev, "failed to register nvmem device for RTC\n");
  28
  29         return PTR_ERR_OR_ZERO(nvmem);
  30 }
  31 EXPORT_SYMBOL_GPL(devm_rtc_nvmem_register);