diff options
Diffstat (limited to 'chip/it83xx/ec2i.c')
| -rw-r--r-- | chip/it83xx/ec2i.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/chip/it83xx/ec2i.c b/chip/it83xx/ec2i.c index 31ed7b4595..5807b3ed32 100644 --- a/chip/it83xx/ec2i.c +++ b/chip/it83xx/ec2i.c @@ -19,6 +19,28 @@ static const struct ec2i_t pnpcfg_settings[] = { {HOST_INDEX_LDN, LDN_KBC_KEYBOARD}, /* Set IRQ=01h for logical device */ {HOST_INDEX_IRQNUMX, 0x01}, + /* Configure IRQTP for KBC. */ +#ifdef CONFIG_HOSTCMD_ESPI + /* + * Interrupt request type select (IRQTP) for KBC. + * bit 1, 0: IRQ request is buffered and applied to SERIRQ + * 1: IRQ request is inverted before being applied to SERIRQ + * bit 0, 0: Edge triggered mode + * 1: Level triggered mode + * + * SERIRQ# is by default deasserted level high. However, when using + * eSPI, SERIRQ# is routed over virtual wire as interrupt event. As + * per eSPI base spec (doc#327432), all virtual wire interrupt events + * are deasserted level low. Thus, it is necessary to configure this + * interrupt as inverted. ITE hardware takes care of routing the SERIRQ# + * signal appropriately over eSPI / LPC depending upon the selected + * mode. + * + * Additionally, this interrupt is configured as edge-triggered on the + * host side. So, match the trigger mode on the EC side as well. + */ + {HOST_INDEX_IRQTP, 0x02}, +#endif /* Enable logical device */ {HOST_INDEX_LDA, 0x01}, |