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| author | Nicholas Piggin <npiggin@gmail.com> | 2020-12-22 02:08:37 +1000 |
|---|---|---|
| committer | Vasant Hegde <hegdevasant@linux.vnet.ibm.com> | 2021-01-05 11:26:43 +0530 |
| commit | 0f2c57df54bba164dd350b2b4dd49fccda988f85 (patch) | |
| tree | fc157c09918374bb2d085e0d92b7447e9d30e8fc | |
| parent | b44c7594523d20945179e497c45ec9007981ac75 (diff) | |
| download | skiboot-0f2c57df54bba164dd350b2b4dd49fccda988f85.zip skiboot-0f2c57df54bba164dd350b2b4dd49fccda988f85.tar.gz skiboot-0f2c57df54bba164dd350b2b4dd49fccda988f85.tar.bz2 | |
mambo: add a mambo rtc_write
This just keeps the requested delta and uses it to adjust subsequent
rtc_read calls.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
| -rw-r--r-- | platforms/mambo/mambo.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/platforms/mambo/mambo.c b/platforms/mambo/mambo.c index 0c96100..a1e0488 100644 --- a/platforms/mambo/mambo.c +++ b/platforms/mambo/mambo.c @@ -173,6 +173,8 @@ static void bogus_disk_flash_init(void) } } +static int64_t time_delta = 0; + static int64_t mambo_rtc_read(__be32 *ymd, __be64 *hmsm) { int64_t mambo_time; @@ -186,6 +188,7 @@ static int64_t mambo_rtc_read(__be32 *ymd, __be64 *hmsm) mambo_time = callthru0(SIM_GET_TIME_CODE); mt = mambo_time >> 32; + mt += time_delta; gmtime_r(&mt, &t); tm_to_datetime(&t, &__ymd, &__hmsm); @@ -195,12 +198,30 @@ static int64_t mambo_rtc_read(__be32 *ymd, __be64 *hmsm) return OPAL_SUCCESS; } +static int64_t mambo_rtc_write(uint32_t ymd, uint64_t hmsm) +{ + int64_t mambo_time; + struct tm tm; + time_t mt, new_mt; + + mambo_time = callthru0(SIM_GET_TIME_CODE); + mt = mambo_time >> 32; + + datetime_to_tm(ymd, hmsm, &tm); + new_mt = mktime(&tm); + + time_delta = new_mt - mt; + + return OPAL_SUCCESS; +} + static void mambo_rtc_init(void) { struct dt_node *np = dt_new(opal_node, "rtc"); dt_add_property_strings(np, "compatible", "ibm,opal-rtc"); opal_register(OPAL_RTC_READ, mambo_rtc_read, 2); + opal_register(OPAL_RTC_WRITE, mambo_rtc_write, 2); } static void mambo_system_reset_cpu(struct cpu_thread *cpu) |