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![Alexandre Belloni](/assets/img/avatar_default.png)
Many RTCs have an on board non volatile storage. It can be battery backed RAM or an EEPROM. Use the nvmem subsystem to export it to both userspace and in-kernel consumers. This stays compatible with the previous (non documented) ABI that was using /sys/class/rtc/rtcx/device/nvram to export that memory. But will warn about the deprecation. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#ifdef CONFIG_RTC_INTF_DEV
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extern void __init rtc_dev_init(void);
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extern void __exit rtc_dev_exit(void);
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extern void rtc_dev_prepare(struct rtc_device *rtc);
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#else
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static inline void rtc_dev_init(void)
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{
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}
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static inline void rtc_dev_exit(void)
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{
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}
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static inline void rtc_dev_prepare(struct rtc_device *rtc)
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{
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}
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#endif
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#ifdef CONFIG_RTC_INTF_PROC
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extern void rtc_proc_add_device(struct rtc_device *rtc);
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extern void rtc_proc_del_device(struct rtc_device *rtc);
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#else
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static inline void rtc_proc_add_device(struct rtc_device *rtc)
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{
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}
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static inline void rtc_proc_del_device(struct rtc_device *rtc)
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{
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}
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#endif
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#ifdef CONFIG_RTC_INTF_SYSFS
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const struct attribute_group **rtc_get_dev_attribute_groups(void);
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#else
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static inline const struct attribute_group **rtc_get_dev_attribute_groups(void)
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{
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return NULL;
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}
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#endif
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#ifdef CONFIG_RTC_NVMEM
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void rtc_nvmem_register(struct rtc_device *rtc);
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void rtc_nvmem_unregister(struct rtc_device *rtc);
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#else
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static inline void rtc_nvmem_register(struct rtc_device *rtc) {}
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static inline void rtc_nvmem_unregister(struct rtc_device *rtc) {}
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#endif
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