linux/drivers/rtc/nvmem.c
Bartosz Golaszewski 6746bc095b rtc: nvmem: emit an error message when nvmem registration fails
Some users check the return value of devm_rtc_nvmem_register() only in
order to emit an error message and then continue probing. This is fine
as an rtc can function without exposing nvmem but let's generalize it:
let's make the registration function emit the error message so that
users don't have to.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-7-brgl@bgdev.pl
2020-11-19 12:50:12 +01:00

31 lines
703 B
C

// SPDX-License-Identifier: GPL-2.0
/*
* RTC subsystem, nvmem interface
*
* Copyright (C) 2017 Alexandre Belloni
*/
#include <linux/err.h>
#include <linux/types.h>
#include <linux/nvmem-consumer.h>
#include <linux/rtc.h>
int devm_rtc_nvmem_register(struct rtc_device *rtc,
struct nvmem_config *nvmem_config)
{
struct device *dev = rtc->dev.parent;
struct nvmem_device *nvmem;
if (!nvmem_config)
return -ENODEV;
nvmem_config->dev = dev;
nvmem_config->owner = rtc->owner;
nvmem = devm_nvmem_register(dev, nvmem_config);
if (IS_ERR(nvmem))
dev_err(dev, "failed to register nvmem device for RTC\n");
return PTR_ERR_OR_ZERO(nvmem);
}
EXPORT_SYMBOL_GPL(devm_rtc_nvmem_register);