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powerpc/powernv: More little endian issues in OPAL RTC driver

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Sparse caught an issue where opal_set_rtc_time was incorrectly
byteswapping. Also fix a number of sparse warnings.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2013-09-23 12:05:05 +10:00 committed by Benjamin Herrenschmidt
parent 29186097f9
commit 6feff6d4a5
2 changed files with 12 additions and 11 deletions
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4
arch/powerpc/include/asm/opal.h
View file

@ -543,8 +543,8 @@ int64_t opal_console_read(int64_t term_number, __be64 *length,
uint8_t *buffer);
int64_t opal_console_write_buffer_space(int64_t term_number,
__be64 *length);
int64_t opal_rtc_read(uint32_t *year_month_day,
uint64_t *hour_minute_second_millisecond);
int64_t opal_rtc_read(__be32 *year_month_day,
__be64 *hour_minute_second_millisecond);
int64_t opal_rtc_write(uint32_t year_month_day,
uint64_t hour_minute_second_millisecond);
int64_t opal_cec_power_down(uint64_t request);

19
arch/powerpc/platforms/powernv/opal-rtc.c
View file

@ -37,10 +37,12 @@ unsigned long __init opal_get_boot_time(void)
struct rtc_time tm;
u32 y_m_d;
u64 h_m_s_ms;
__be32 __y_m_d;
__be64 __h_m_s_ms;
long rc = OPAL_BUSY;
while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
rc = opal_rtc_read(&y_m_d, &h_m_s_ms);
rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms);
if (rc == OPAL_BUSY_EVENT)
opal_poll_events(NULL);
else
@ -48,8 +50,8 @@ unsigned long __init opal_get_boot_time(void)
}
if (rc != OPAL_SUCCESS)
return 0;
y_m_d = be32_to_cpu(y_m_d);
h_m_s_ms = be64_to_cpu(h_m_s_ms);
y_m_d = be32_to_cpu(__y_m_d);
h_m_s_ms = be64_to_cpu(__h_m_s_ms);
opal_to_tm(y_m_d, h_m_s_ms, &tm);
return mktime(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
@ -60,9 +62,11 @@ void opal_get_rtc_time(struct rtc_time *tm)
long rc = OPAL_BUSY;
u32 y_m_d;
u64 h_m_s_ms;
__be32 __y_m_d;
__be64 __h_m_s_ms;
while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
rc = opal_rtc_read(&y_m_d, &h_m_s_ms);
rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms);
if (rc == OPAL_BUSY_EVENT)
opal_poll_events(NULL);
else
@ -70,8 +74,8 @@ void opal_get_rtc_time(struct rtc_time *tm)
}
if (rc != OPAL_SUCCESS)
return;
y_m_d = be32_to_cpu(y_m_d);
h_m_s_ms = be64_to_cpu(h_m_s_ms);
y_m_d = be32_to_cpu(__y_m_d);
h_m_s_ms = be64_to_cpu(__h_m_s_ms);
opal_to_tm(y_m_d, h_m_s_ms, tm);
}
@ -90,9 +94,6 @@ int opal_set_rtc_time(struct rtc_time *tm)
h_m_s_ms |= ((u64)bin2bcd(tm->tm_min)) << 48;
h_m_s_ms |= ((u64)bin2bcd(tm->tm_sec)) << 40;
y_m_d = cpu_to_be32(y_m_d);
h_m_s_ms = cpu_to_be64(h_m_s_ms);
while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
rc = opal_rtc_write(y_m_d, h_m_s_ms);
if (rc == OPAL_BUSY_EVENT)