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fdcfd85433
rtc_register_device() is a managed interface but it doesn't use devres by itself - instead it marks an rtc_device as "registered" and the devres callback for devm_rtc_allocate_device() takes care of resource release. This doesn't correspond with the design behind devres where managed structures should not be aware of being managed. The correct solution here is to register a separate devres callback for unregistering the device. While at it: rename rtc_register_device() to devm_rtc_register_device() and add it to the list of managed interfaces in devres.rst. This way we can avoid any potential confusion of driver developers who may expect there to exist a corresponding unregister function. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20201109163409.24301-8-brgl@bgdev.pl
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
/* rtc-starfire.c: Starfire platform RTC driver.
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*
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* Author: David S. Miller
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* License: GPL
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*
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* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/rtc.h>
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#include <linux/platform_device.h>
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#include <asm/oplib.h>
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static u32 starfire_get_time(void)
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{
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static char obp_gettod[32];
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static u32 unix_tod;
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sprintf(obp_gettod, "h# %08x unix-gettod",
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(unsigned int) (long) &unix_tod);
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prom_feval(obp_gettod);
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return unix_tod;
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}
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static int starfire_read_time(struct device *dev, struct rtc_time *tm)
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{
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rtc_time64_to_tm(starfire_get_time(), tm);
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return 0;
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}
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static const struct rtc_class_ops starfire_rtc_ops = {
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.read_time = starfire_read_time,
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};
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static int __init starfire_rtc_probe(struct platform_device *pdev)
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{
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struct rtc_device *rtc;
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rtc = devm_rtc_allocate_device(&pdev->dev);
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if (IS_ERR(rtc))
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return PTR_ERR(rtc);
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rtc->ops = &starfire_rtc_ops;
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rtc->range_max = U32_MAX;
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platform_set_drvdata(pdev, rtc);
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return devm_rtc_register_device(rtc);
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}
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static struct platform_driver starfire_rtc_driver = {
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.driver = {
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.name = "rtc-starfire",
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},
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};
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builtin_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
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