diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/i2c/tpm/cr50.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c index f7e667b1d9..0877de01ea 100644 --- a/src/drivers/i2c/tpm/cr50.c +++ b/src/drivers/i2c/tpm/cr50.c @@ -48,6 +48,8 @@ #define CR50_MAX_BUFSIZE 63 #define CR50_TIMEOUT_LONG_MS 2000 /* Long timeout while waiting for TPM */ #define CR50_TIMEOUT_SHORT_MS 2 /* Short timeout during transactions */ +#define CR50_TIMEOUT_NOIRQ_MS 20 /* Timeout for TPM ready without IRQ */ +#define CR50_TIMEOUT_IRQ_MS 100 /* Timeout for TPM ready with IRQ */ #define CR50_DID_VID 0x00281ae0L struct tpm_inf_dev { @@ -65,11 +67,11 @@ static int cr50_i2c_wait_tpm_ready(struct tpm_chip *chip) if (!chip->vendor.irq_status) { /* Fixed delay if interrupt not supported */ - mdelay(CR50_TIMEOUT_SHORT_MS); + mdelay(CR50_TIMEOUT_NOIRQ_MS); return 0; } - stopwatch_init_msecs_expire(&sw, 5 * CR50_TIMEOUT_SHORT_MS); + stopwatch_init_msecs_expire(&sw, CR50_TIMEOUT_IRQ_MS); while (!chip->vendor.irq_status(chip->vendor.irq)) if (stopwatch_expired(&sw)) @@ -429,6 +431,11 @@ static void cr50_vendor_init(struct tpm_chip *chip) chip->vendor.irq = -1; #endif } + + if (chip->vendor.irq <= 0) + printk(BIOS_WARNING, + "%s: No IRQ, will use %ums delay for TPM ready\n", + __func__, CR50_TIMEOUT_NOIRQ_MS); } int tpm_vendor_probe(unsigned bus, uint32_t addr) |