diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_tis.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index a84108cd932f..88de8fc41586 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -649,11 +649,36 @@ static int tpm_tis_pnp_suspend(struct pnp_dev *dev, pm_message_t msg) return tpm_pm_suspend(&dev->dev, msg); } +static void tpm_tis_reenable_interrupts(struct tpm_chip *chip) +{ + u32 intmask; + + /* reenable interrupts that device may have lost or + BIOS/firmware may have disabled */ + iowrite8(chip->vendor.irq, chip->vendor.iobase + + TPM_INT_VECTOR(chip->vendor.locality)); + + intmask = + ioread32(chip->vendor.iobase + + TPM_INT_ENABLE(chip->vendor.locality)); + + intmask |= TPM_INTF_CMD_READY_INT + | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT + | TPM_INTF_STS_VALID_INT | TPM_GLOBAL_INT_ENABLE; + + iowrite32(intmask, + chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality)); +} + + static int tpm_tis_pnp_resume(struct pnp_dev *dev) { struct tpm_chip *chip = pnp_get_drvdata(dev); int ret; + if (chip->vendor.irq) + tpm_tis_reenable_interrupts(chip); + ret = tpm_pm_resume(&dev->dev); if (!ret) tpm_continue_selftest(chip); @@ -706,6 +731,11 @@ static int tpm_tis_suspend(struct platform_device *dev, pm_message_t msg) static int tpm_tis_resume(struct platform_device *dev) { + struct tpm_chip *chip = dev_get_drvdata(&dev->dev); + + if (chip->vendor.irq) + tpm_tis_reenable_interrupts(chip); + return tpm_pm_resume(&dev->dev); } static struct platform_driver tis_drv = { |