diff options
Diffstat (limited to 'drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c')
| -rw-r--r-- | drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c index bfed0e2746..774f8d0514 100644 --- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c @@ -2563,15 +2563,20 @@ static int aspeed_g4_sig_expr_set(struct aspeed_pinmux_data *ctx, * deconfigured and is the reason we re-evaluate after writing * all descriptor bits. * - * Port D and port E GPIO loopback modes are the only exception - * as those are commonly used with front-panel buttons to allow - * normal operation of the host when the BMC is powered off or - * fails to boot. Once the BMC has booted, the loopback mode - * must be disabled for the BMC to control host power-on and - * reset. + * We make two exceptions to the read-only rule: + * + * - The passthrough mode of GPIO ports D and E are commonly + * used with front-panel buttons to allow normal operation + * of the host if the BMC is powered off or fails to boot. + * Once the BMC has booted, the loopback mode must be + * disabled for the BMC to control host power-on and reset. + * + * - The operating mode of the SPI1 interface is simply + * strapped incorrectly on some systems and requires a + * software fixup, which we allow to be done via pinctrl. */ if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP1 && - !(desc->mask & (BIT(21) | BIT(22)))) + !(desc->mask & (BIT(22) | BIT(21) | BIT(13) | BIT(12)))) continue; if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP2) |