diff options
Diffstat (limited to 'src/soc/intel/fsp_broadwell_de/southcluster.c')
| -rw-r--r-- | src/soc/intel/fsp_broadwell_de/southcluster.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/soc/intel/fsp_broadwell_de/southcluster.c b/src/soc/intel/fsp_broadwell_de/southcluster.c index 7ed889662e..e8c8706a5c 100644 --- a/src/soc/intel/fsp_broadwell_de/southcluster.c +++ b/src/soc/intel/fsp_broadwell_de/southcluster.c @@ -215,7 +215,14 @@ static void sc_init(struct device *dev) PCI_COMMAND_MASTER | PCI_COMMAND_SPECIAL); /* Program Serial IRQ register. */ - pci_write_config8(dev, 0x64, 0xd0); + pci_write_config8(dev, SIRQ_CNTL, SIRQ_EN | SIRQ_MODE_CONT); + if (!IS_ENABLED(CONFIG_SERIRQ_CONTINUOUS_MODE)) { + /* If SERIRQ have to operate in quiet mode, it should have been + run in continuous mode for at least one frame first. Use I/O + access to achieve the delay of at least one LPC cycle. */ + outb(inb(0x80), 0x80); + pci_write_config8(dev, SIRQ_CNTL, SIRQ_EN | SIRQ_MODE_QUIET); + } sc_pirq_init(dev); write_pci_config_irqs(); |