Merge branch 'fix/fix_ota_slowclock_switching_v5.4' into 'release/v5.4'

fix(esp_hw_support): fix rtc slow clock missing after the OTA app changes the slow clock source (v5.4)

See merge request espressif/esp-idf!34488

components/esp_hw_support/port/esp32c6/pmu_param.c

@@ -336,21 +336,14 @@ const pmu_hp_system_retention_param_t * pmu_hp_system_retention_param_default(pm
 
 
 /** LP system default parameter */
-
-#if CONFIG_ESP_SYSTEM_RTC_EXT_XTAL
-# define PMU_SLOW_CLK_USE_EXT_XTAL  (1)
-#else
-# define PMU_SLOW_CLK_USE_EXT_XTAL  (0)
-#endif
-
 #define PMU_LP_ACTIVE_POWER_CONFIG_DEFAULT() { \
     .dig_power = {              \
         .mem_dslp       = 0,    \
         .peri_pd_en     = 0,    \
     }, \
     .clk_power = {              \
-        .xpd_xtal32k    = PMU_SLOW_CLK_USE_EXT_XTAL,    \
-        .xpd_rc32k      = 0,    \
+        .xpd_xtal32k    = 1,    \
+        .xpd_rc32k      = 1,    \
         .xpd_fosc       = 1,    \
         .pd_osc         = 0     \
     } \

components/esp_hw_support/port/esp32h2/pmu_param.c

@@ -335,21 +335,14 @@ const pmu_hp_system_retention_param_t * pmu_hp_system_retention_param_default(pm
 
 
 /** LP system default parameter */
-
-#if CONFIG_ESP_SYSTEM_RTC_EXT_XTAL
-# define PMU_SLOW_CLK_USE_EXT_XTAL  (1)
-#else
-# define PMU_SLOW_CLK_USE_EXT_XTAL  (0)
-#endif
-
 #define PMU_LP_ACTIVE_POWER_CONFIG_DEFAULT() { \
     .dig_power = {              \
         .mem_dslp       = 0,    \
         .peri_pd_en     = 0,    \
     }, \
     .clk_power = {              \
-        .xpd_xtal32k    = PMU_SLOW_CLK_USE_EXT_XTAL,    \
-        .xpd_rc32k      = 0,    \
+        .xpd_xtal32k    = 1,    \
+        .xpd_rc32k      = 1,    \
         .xpd_fosc       = 1,    \
         .pd_osc         = 0     \
     } \

components/esp_system/port/soc/esp32c5/clk.c

@@ -164,6 +164,12 @@ static void select_rtc_slow_clk(soc_rtc_slow_clk_src_t rtc_slow_clk_src)
         }
         rtc_clk_slow_src_set(rtc_slow_clk_src);
 
+        // Disable unused clock sources after clock source switching is complete.
+        // Regardless of the clock source selection, the internal 136K clock source will always keep on.
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_XTAL32K && rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_OSC_SLOW) {
+            rtc_clk_32k_enable(false);
+        }
+
         if (SLOW_CLK_CAL_CYCLES > 0) {
             /* TODO: 32k XTAL oscillator has some frequency drift at startup.
              * Improve calibration routine to wait until the frequency is stable.

components/esp_system/port/soc/esp32c6/clk.c

@@ -185,6 +185,15 @@ static void select_rtc_slow_clk(soc_rtc_slow_clk_src_t rtc_slow_clk_src)
         }
         rtc_clk_slow_src_set(rtc_slow_clk_src);
 
+        // Disable unused clock sources after clock source switching is complete.
+        // Regardless of the clock source selection, the internal 136K clock source will always keep on.
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_XTAL32K && rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_OSC_SLOW) {
+            rtc_clk_32k_enable(false);
+        }
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_RC32K) {
+            rtc_clk_rc32k_enable(false);
+        }
+
         if (SLOW_CLK_CAL_CYCLES > 0) {
             /* TODO: 32k XTAL oscillator has some frequency drift at startup.
              * Improve calibration routine to wait until the frequency is stable.

components/esp_system/port/soc/esp32c61/clk.c

@@ -148,6 +148,12 @@ static void select_rtc_slow_clk(soc_rtc_slow_clk_src_t rtc_slow_clk_src)
         }
         rtc_clk_slow_src_set(rtc_slow_clk_src);
 
+        // Disable unused clock sources after clock source switching is complete.
+        // Regardless of the clock source selection, the internal 136K clock source will always keep on.
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_XTAL32K && rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_OSC_SLOW) {
+            rtc_clk_32k_enable(false);
+        }
+
         if (SLOW_CLK_CAL_CYCLES > 0) {
             /* TODO: 32k XTAL oscillator has some frequency drift at startup.
              * Improve calibration routine to wait until the frequency is stable.

components/esp_system/port/soc/esp32h2/clk.c

@@ -184,6 +184,15 @@ static void select_rtc_slow_clk(soc_rtc_slow_clk_src_t rtc_slow_clk_src)
         }
         rtc_clk_slow_src_set(rtc_slow_clk_src);
 
+        // Disable unused clock sources after clock source switching is complete.
+        // Regardless of the clock source selection, the internal 136K clock source will always keep on.
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_XTAL32K && rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_OSC_SLOW) {
+            rtc_clk_32k_enable(false);
+        }
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_RC32K) {
+            rtc_clk_rc32k_enable(false);
+        }
+
         if (SLOW_CLK_CAL_CYCLES > 0) {
             /* TODO: 32k XTAL oscillator has some frequency drift at startup.
              * Improve calibration routine to wait until the frequency is stable.

components/esp_system/port/soc/esp32p4/clk.c

@@ -189,6 +189,15 @@ static void select_rtc_slow_clk(soc_rtc_slow_clk_src_t rtc_slow_clk_src)
         }
         rtc_clk_slow_src_set(rtc_slow_clk_src);
 
+        // Disable unused clock sources after clock source switching is complete.
+        // Regardless of the clock source selection, the internal 136K clock source will always keep on.
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_XTAL32K) {
+            rtc_clk_32k_enable(false);
+        }
+        if (rtc_slow_clk_src != SOC_RTC_SLOW_CLK_SRC_RC32K) {
+            rtc_clk_rc32k_enable(false);
+        }
+
         if (SLOW_CLK_CAL_CYCLES > 0) {
             /* TODO: 32k XTAL oscillator has some frequency drift at startup.
              * Improve calibration routine to wait until the frequency is stable.