mb/google/trulo/var/kaladin: Disable eMMC GPIOs via firmware config

Eren Peng · MrChromebox · commit 56700713de9f · 2025-09-16T15:05:32.000Z
Disable eMMC related GPIO pins via firmware config on non-eMMC skus BUG=b:443202137 TEST=flash and boot successfully on all kaladin SKU Change-Id: Ia98702368208649fc0891417c7e8c6c3685d40be Signed-off-by: Eren Peng <peng.eren@inventec.corp-partner.google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/89069 Reviewed-by: Eric Lai <ericllai@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/brya/variants/kaladin/variant.c b/src/mainboard/google/brya/variants/kaladin/variant.c
@@ -11,6 +11,33 @@ const char *get_wifi_sar_cbfs_filename(void)
 	return get_wifi_sar_fw_config_filename(FW_CONFIG_FIELD(WIFI_SAR));
 }
 
+static const struct pad_config emmc_disable_pads[] = {
+	/* I7  : EMMC_CMD */
+	PAD_NC(GPP_I7, NONE),
+	/* I8  : EMMC_D0 */
+	PAD_NC(GPP_I8, NONE),
+	/* I9  : EMMC_D1 */
+	PAD_NC(GPP_I9, NONE),
+	/* I10 : EMMC_D2 */
+	PAD_NC(GPP_I10, NONE),
+	/* I11 : EMMC_D3 */
+	PAD_NC(GPP_I11, NONE),
+	/* I12 : EMMC_D4 */
+	PAD_NC(GPP_I12, NONE),
+	/* I13 : EMMC_D5 */
+	PAD_NC(GPP_I13, NONE),
+	/* I14 : EMMC_D6 */
+	PAD_NC(GPP_I14, NONE),
+	/* I15 : EMMC_D7 */
+	PAD_NC(GPP_I15, NONE),
+	/* I16 : EMMC_RCLK */
+	PAD_NC(GPP_I16, NONE),
+	/* I17 : EMMC_CLK */
+	PAD_NC(GPP_I17, NONE),
+	/* I18 : EMMC_RST_L */
+	PAD_NC(GPP_I18, NONE),
+};
+
 static const struct pad_config ish_disable_pads[] = {
 	/* B3  : ISH_IMU_INT_L ==>NC */
 	PAD_NC(GPP_B3, NONE),
@@ -34,6 +61,10 @@ void fw_config_gpio_padbased_override(struct pad_config *padbased_table)
 		printk(BIOS_INFO, "Disable ISH GPIO pins.\n");
 		gpio_padbased_override(padbased_table, ish_disable_pads, ARRAY_SIZE(ish_disable_pads));
 	}
+	if (!fw_config_probe(FW_CONFIG(STORAGE, STORAGE_EMMC)) && !fw_config_probe(FW_CONFIG(STORAGE, STORAGE_UNKNOWN))) {
+		printk(BIOS_INFO, "Disable eMMC GPIO pins.\n");
+		gpio_padbased_override(padbased_table, emmc_disable_pads, ARRAY_SIZE(emmc_disable_pads));
+	}
 }
 
 void variant_configure_pads(void)
