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ssb: set the PMU watchdog if available 

Some ssb based devices have a PMU and the PMU watchdog register should
be used instead of the register in the chip common part, if the device
has a PMU. This patch also calculates the maximal number the watchdog
could be set to.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hauke Mehrtens 2012-12-05 18:46:04 +01:00 committed by John W. Linville
parent f924e1e989
commit 26107309c0
1 changed files with 36 additions and 2 deletions
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38
drivers/ssb/driver_chipcommon.c
View File

@ -288,6 +288,24 @@ static u32 ssb_chipco_alp_clock(struct ssb_chipcommon *cc)
return 20000000;
}
static u32 ssb_chipco_watchdog_get_max_timer(struct ssb_chipcommon *cc)
{
u32 nb;
if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
if (cc->dev->id.revision < 26)
nb = 16;
else
nb = (cc->dev->id.revision >= 37) ? 32 : 24;
} else {
nb = 28;
}
if (nb == 32)
return 0xffffffff;
else
return (1 << nb) - 1;
}
void ssb_chipcommon_init(struct ssb_chipcommon *cc)
{
if (!cc->dev)
@ -405,8 +423,24 @@ void ssb_chipco_timing_init(struct ssb_chipcommon *cc,
/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
void ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
{
/* instant NMI */
chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
u32 maxt;
enum ssb_clkmode clkmode;
maxt = ssb_chipco_watchdog_get_max_timer(cc);
if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
if (ticks == 1)
ticks = 2;
else if (ticks > maxt)
ticks = maxt;
chipco_write32(cc, SSB_CHIPCO_PMU_WATCHDOG, ticks);
} else {
clkmode = ticks ? SSB_CLKMODE_FAST : SSB_CLKMODE_DYNAMIC;
ssb_chipco_set_clockmode(cc, clkmode);
if (ticks > maxt)
ticks = maxt;
/* instant NMI */
chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
}
}
void ssb_chipco_irq_mask(struct ssb_chipcommon *cc, u32 mask, u32 value)