From 9a4c72bb87de3ca88ac4d5976a98fe7b2e74ca05 Mon Sep 17 00:00:00 2001
From: Tero Salminen <tero.salminen@unikie.com>
Date: Thu, 30 Jan 2025 08:56:20 +0200
Subject: [PATCH] arch/arm64/src/imx9/imx9_pmic: add RESET_CTRL register
 interface

Signed-off-by: Tero Salminen <tero.salminen@unikie.com>
---
 arch/arm64/src/imx9/imx9_pmic.c | 32 ++++++++++++++++++++++++++++
 arch/arm64/src/imx9/imx9_pmic.h | 37 +++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)

diff --git a/arch/arm64/src/imx9/imx9_pmic.c b/arch/arm64/src/imx9/imx9_pmic.c
index bd46c651385a6..f510a65c5c63a 100644
--- a/arch/arm64/src/imx9/imx9_pmic.c
+++ b/arch/arm64/src/imx9/imx9_pmic.c
@@ -48,6 +48,7 @@
 #define PCA9451A_I2C_ADDR       0x25
 #define REG_SW_RST              0x06
 #define REG_POWERON_STAT        0x05
+#define REG_RESET_CTRL          0x08
 #define COLD_RESET              0x64
 #define WARM_RESET              0x35
 
@@ -174,3 +175,34 @@ int imx9_pmic_get_reset_reason(uint8_t *value)
   return imx9_pmic_reg_read(REG_POWERON_STAT, value);
 }
 
+/****************************************************************************
+ * Name: imx9_pmic_get_reset_ctrl
+ *
+ * Description:
+ *  Read reset control register value
+ *
+ ****************************************************************************/
+
+int imx9_pmic_get_reset_ctrl(uint8_t *value)
+{
+  return imx9_pmic_reg_read(REG_RESET_CTRL, value);
+}
+
+/****************************************************************************
+ * Name: imx9_pmic_set_reset_ctrl
+ *
+ * Description:
+ *  Set reset control register value
+ *
+ * Input Parameters:
+ *   Register value
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+int imx9_pmic_set_reset_ctrl(uint8_t val)
+{
+  return imx9_pmic_reg_write(REG_RESET_CTRL, val);
+}
diff --git a/arch/arm64/src/imx9/imx9_pmic.h b/arch/arm64/src/imx9/imx9_pmic.h
index 2a3640a2fb873..2272d8d9b19c3 100644
--- a/arch/arm64/src/imx9/imx9_pmic.h
+++ b/arch/arm64/src/imx9/imx9_pmic.h
@@ -44,6 +44,11 @@ extern "C"
 #define EXTERN extern
 #endif
 
+#define IMX9_PMIC_RESET_CTRL_DEFAULT                0x21
+
+/* WDOG_B_CFG [7:6]: 11b (Cold Reset) */
+#define IMX9_PMIC_RESET_CTRL_WDOG_COLD_RESET_MASK   0xC0
+
 /****************************************************************************
  * Name: imx9_pmic_get_reset_reason
  *
@@ -76,6 +81,38 @@ int imx9_pmic_get_reset_reason(uint8_t *value);
 
 int imx9_pmic_reset(void);
 
+/****************************************************************************
+ * Name: imx9_pmic_get_reset_ctrl
+ *
+ * Description:
+ *  Read reset control register value
+ *
+ * Input Parameters:
+ *   Pointer to reset reason value
+ *
+ * Returned Value:
+ *   Zero on success or error code
+ *
+ ****************************************************************************/
+
+int imx9_pmic_get_reset_ctrl(uint8_t *value);
+
+/****************************************************************************
+ * Name: imx9_pmic_set_reset_ctrl
+ *
+ * Description:
+ *  Set reset control register value
+ *
+ * Input Parameters:
+ *   Register value
+ *
+ * Returned Value:
+ *   Zero on success or error code
+ *
+ ****************************************************************************/
+
+int imx9_pmic_set_reset_ctrl(uint8_t val);
+
 #undef EXTERN
 #if defined(__cplusplus)
 }