diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/direct-controls.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/core/direct-controls.c b/core/direct-controls.c index 9acdab5e..c6834d77 100644 --- a/core/direct-controls.c +++ b/core/direct-controls.c @@ -36,7 +36,10 @@ #define P9_EC_PPM_SSHHYP 0x0114 #define P9_SPECIAL_WKUP_DONE PPC_BIT(1) -#define P9_SPWKUP_TIMEOUT 10 + +/* Waking may take up to 5ms for deepest sleep states. Set timeout to 100ms */ +#define P9_SPWKUP_POLL_INTERVAL 100 +#define P9_SPWKUP_TIMEOUT 100000 /* * This implements direct control facilities of processor cores and threads @@ -62,7 +65,7 @@ static int p9_core_set_special_wakeup(struct cpu_thread *cpu) return OPAL_HARDWARE; } - for (i = 0; i < P9_SPWKUP_TIMEOUT; i++) { + for (i = 0; i < P9_SPWKUP_TIMEOUT/P9_SPWKUP_POLL_INTERVAL; i++) { if (xscom_read(chip_id, sshhyp_addr, &val)) { prlog(PR_ERR, "Could not set special wakeup on %u:%u:" " Unable to read PPM_SSHHYP.\n", @@ -72,7 +75,7 @@ static int p9_core_set_special_wakeup(struct cpu_thread *cpu) if (val & P9_SPECIAL_WKUP_DONE) return 0; - time_wait_us(1); + time_wait_us(P9_SPWKUP_POLL_INTERVAL); } prlog(PR_ERR, "Could not set special wakeup on %u:%u:" |
