From 697e5a47aa12cdab6f2a8b284cc923cdf704eafc Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Thu, 6 Jul 2017 11:42:02 +0200 Subject: rtc: add generic nvmem support 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 --- drivers/rtc/rtc-core.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/rtc/rtc-core.h') diff --git a/drivers/rtc/rtc-core.h b/drivers/rtc/rtc-core.h index 7a4ed2f7c7d7..ecab76a3207c 100644 --- a/drivers/rtc/rtc-core.h +++ b/drivers/rtc/rtc-core.h @@ -45,3 +45,11 @@ static inline const struct attribute_group **rtc_get_dev_attribute_groups(void) return NULL; } #endif + +#ifdef CONFIG_RTC_NVMEM +void rtc_nvmem_register(struct rtc_device *rtc); +void rtc_nvmem_unregister(struct rtc_device *rtc); +#else +static inline void rtc_nvmem_register(struct rtc_device *rtc) {} +static inline void rtc_nvmem_unregister(struct rtc_device *rtc) {} +#endif -- cgit v1.2.3