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powerpc/powernv: Add RTC and NVRAM support plus RTAS fallbacks

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Implements OPAL RTC and NVRAM support and wire all that up to
the powernv platform.

We use RTAS for RTC as a fallback if available. Using RTAS for nvram
is not supported yet, pending some rework/cleanup and generalization
of the pSeries & CHRP code. We also use RTAS fallbacks for power off
and reboot

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2011-09-19 17:45:01 +00:00
parent ec27329ffb
commit 628daa8d5a
5 changed files with 230 additions and 22 deletions
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6
arch/powerpc/include/asm/opal.h
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@@ -430,6 +430,12 @@ extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len);
extern void hvc_opal_init_early(void);
struct rtc_time;
extern int opal_set_rtc_time(struct rtc_time *tm);
extern void opal_get_rtc_time(struct rtc_time *tm);
extern unsigned long opal_get_boot_time(void);
extern void opal_nvram_init(void);
#endif /* __ASSEMBLY__ */
#endif /* __OPAL_H */