soc/mediatek/mt8186: Add PMIF_SPMI_IOCFG_DEFAULT_SETTING Kconfig option

For MT8186, PMIF_SPMI mode is the hardware default setting, so we don't
need to configure PMIF SPMI IO pins. Add a config to control that.

BUG=b:249436110
TEST=build pass.
BRANCH=corsola

Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: I92b54e8379a5dec55ef95cbd72ce03abd3a4954b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68578
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/common/Kconfig

@@ -70,4 +70,11 @@ config PWRAP_WITH_PMIF_SPMI
 	  When this option is enabled, the PMIC interface only supports PWRAP
 	  and PMIF_SPMI.
 
+config PMIF_SPMI_IOCFG_DEFAULT_SETTING
+	bool
+	default n
+	help
+	  For SoCs where IO pins default to PMIF_SPMI mode, enable this option
+	  to skip software PMIF_SPMI IO pins configuration.
+
 endif

src/soc/mediatek/common/pmif_spmi.c

@@ -82,7 +82,8 @@ static int spmi_mst_init(struct pmif *pmif_arb)
 		return -E_INVAL;
 	}
 
-	pmif_spmi_iocfg();
+	if (!CONFIG(PMIF_SPMI_IOCFG_DEFAULT_SETTING))
+		pmif_spmi_iocfg();
 	spmi_config_master();
 
 	for (i = 0; i < spmi_dev_cnt; i++)

src/soc/mediatek/mt8186/Kconfig

@@ -13,6 +13,7 @@ config SOC_MEDIATEK_MT8186
 	select USE_CBMEM_DRAM_INFO
 	select FLASH_DUAL_IO_READ
 	select PWRAP_WITH_PMIF_SPMI
+	select PMIF_SPMI_IOCFG_DEFAULT_SETTING
 
 if SOC_MEDIATEK_MT8186