mb/goog/brya/var/brya0/skolas: Disable HPS GPIOs if HPS_ABSENT

Check FW_CONFIG and disable gpios for HPS if HPS_ABSENT for skolas
and brya0 variants.

BUG=b:311740746
BRANCH=firmware-brya-14505.B
TEST=`emerge-brya coreboot chromeos-bootimage`, flash and boot skolas
to kernel and verify via "cbmem -c | grep HPS".

Change-Id: I8cbe4f40c41f1d06e8f511c3e88c05984566d441
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79123
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>

src/mainboard/google/brya/variants/brya0/fw_config.c

@@ -123,6 +123,15 @@ static const struct pad_config lte_disable_pads[] = {
 	PAD_NC(GPD11, NONE),
 };
 
+static const struct pad_config hps_disable_pads[] = {
+	/* E3  : PROC_GP0 ==> HPS_INT_ODL */
+	PAD_NC(GPP_E3, NONE),
+	/* E7  : PROC_GP1 ==> EN_HPS_PWR */
+	PAD_NC(GPP_E7, NONE),
+	/* F20 : EXT_PWR_GATE# ==> HPS_RST_R */
+	PAD_NC(GPP_F20, NONE),
+};
+
 static void enable_i2s(void)
 {
 	gpio_configure_pads(dmic_enable_pads, ARRAY_SIZE(dmic_enable_pads));
@@ -183,5 +192,10 @@ static void fw_config_handle(void *unused)
 		printk(BIOS_INFO, "Disable LTE related GPIO pins.\n");
 		gpio_configure_pads(lte_disable_pads, ARRAY_SIZE(lte_disable_pads));
 	}
+
+	if (fw_config_probe(FW_CONFIG(HPS, HPS_ABSENT))) {
+		printk(BIOS_INFO, "Disable HPS related GPIO pins.\n");
+		gpio_configure_pads(hps_disable_pads, ARRAY_SIZE(hps_disable_pads));
+	}
 }
 BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_ENTRY, fw_config_handle, NULL);

src/mainboard/google/brya/variants/skolas/fw_config.c

@@ -100,6 +100,15 @@ static const struct pad_config bt_i2s_disable_pads[] = {
 	PAD_NC(GPP_VGPIO_37, NONE),
 };
 
+static const struct pad_config hps_disable_pads[] = {
+	/* E3  : PROC_GP0 ==> HPS_INT_ODL */
+	PAD_NC(GPP_E3, NONE),
+	/* E7  : PROC_GP1 ==> EN_HPS_PWR */
+	PAD_NC(GPP_E7, NONE),
+	/* F20 : EXT_PWR_GATE# ==> HPS_RST_R */
+	PAD_NC(GPP_F20, NONE),
+};
+
 static const struct pad_config lte_disable_pads[] = {
 	/* A7  : WWAN_PCIE_WAKE_ODL */
 	PAD_NC(GPP_A7, NONE),
@@ -183,5 +192,10 @@ static void fw_config_handle(void *unused)
 		printk(BIOS_INFO, "Disable LTE related GPIO pins.\n");
 		gpio_configure_pads(lte_disable_pads, ARRAY_SIZE(lte_disable_pads));
 	}
+
+	if (fw_config_probe(FW_CONFIG(HPS, HPS_ABSENT))) {
+		printk(BIOS_INFO, "Disable HPS related GPIO pins.\n");
+		gpio_configure_pads(hps_disable_pads, ARRAY_SIZE(hps_disable_pads));
+	}
 }
 BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_ENTRY, fw_config_handle, NULL);