soc: it8xxx2: move gpio-q and elpm initial to early preparation hook

Relocate the initialization of the gpio-q group and the elpm
module to early SoC preparation hook. The elpm xlpout signal
is connected to the main power rail and is driven by firmware
after bootup. Initializing these modules early ensures that
the power rail remains stable and does not drop.

Signed-off-by: Ren Chen <[email protected]>

Author: Chenhongren

soc/ite/ec/it8xxx2/soc.c

@@ -417,6 +417,22 @@ void soc_prep_hook(void)
 	IT8XXX2_GPIO_GPCRB3 = GPCR_PORT_PIN_MODE_INPUT;
 	IT8XXX2_GPIO_GPCRB4 = GPCR_PORT_PIN_MODE_INPUT;
 #endif
+
+#ifdef CONFIG_SOC_IT8XXX2_GPIO_Q_GROUP_SUPPORTED
+#if DT_HAS_COMPAT_STATUS_OKAY(ite_it8xxx2_power_elpm)
+	/* drive xlpout high and then enable elpm firmware control mode if
+	 * the elpm node is marked as okay.
+	 */
+	sys_write8(sys_read8(ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3) | FIRMWARE_CTRL_OUTPUT_H,
+		   ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3);
+	sys_write8(sys_read8(ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3) | FIRMWARE_CTRL_EN,
+		   ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3);
+#endif /* DT_HAS_COMPAT_STATUS_OKAY(ite_it8xxx2_power_elpm) */
+
+	/* set gpio-q group as gpio by default */
+	sys_write8(sys_read8(ELPM_BASE_ADDR + ELPMF5_INPUT_EN) & ~XLPIN_INPUT_ENABLE_MASK,
+		   ELPM_BASE_ADDR + ELPMF5_INPUT_EN);
+#endif /* CONFIG_SOC_IT8XXX2_GPIO_Q_GROUP_SUPPORTED */
 }
 
 static int ite_it8xxx2_init(void)
@@ -537,22 +553,6 @@ static int ite_it8xxx2_init(void)
 	}
 #endif /* (SOC_USBPD_ITE_PHY_PORT_COUNT > 0) */
 
-#ifdef CONFIG_SOC_IT8XXX2_GPIO_Q_GROUP_SUPPORTED
-#if DT_HAS_COMPAT_STATUS_OKAY(ite_it8xxx2_power_elpm)
-	/* drive xlpout high and then enable elpm firmware control mode if
-	 * the elpm node is marked as okay.
-	 */
-	sys_write8(sys_read8(ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3) | FIRMWARE_CTRL_OUTPUT_H,
-		   ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3);
-	sys_write8(sys_read8(ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3) | FIRMWARE_CTRL_EN,
-		   ELPM_BASE_ADDR + ELPMF1_WAKE_UP_CTRL_3);
-#endif /* DT_HAS_COMPAT_STATUS_OKAY(ite_it8xxx2_power_elpm) */
-
-	/* set gpio-q group as gpio by default */
-	sys_write8(sys_read8(ELPM_BASE_ADDR + ELPMF5_INPUT_EN) & ~XLPIN_INPUT_ENABLE_MASK,
-		   ELPM_BASE_ADDR + ELPMF5_INPUT_EN);
-#endif /* CONFIG_SOC_IT8XXX2_GPIO_Q_GROUP_SUPPORTED */
-
 	return 0;
 }
 SYS_INIT(ite_it8xxx2_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);