feat(esp_security): support s31 security clock management

components/esp_hal_security/esp32c61/include/hal/sec_ll.h

@@ -0,0 +1,39 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include <stdint.h>
+#include "soc/clk_tree_defs.h"
+#include "soc/pcr_struct.h"
+#include "hal/assert.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Select crypto clock source.
+ *
+ * @param src Clock source (SOC_MOD_CLK_XTAL, SOC_MOD_CLK_RC_FAST, or SOC_MOD_CLK_SPLL)
+ */
+static inline __attribute__((always_inline)) void sec_ll_crypto_clk_src_sel(soc_module_clk_t src)
+{
+    uint32_t reg_val = 3;
+    if (src == SOC_MOD_CLK_XTAL) {
+        reg_val = 0;
+    } else if (src == SOC_MOD_CLK_RC_FAST) {
+        reg_val = 1;
+    } else if (src == SOC_MOD_CLK_SPLL) {
+        reg_val = 2;
+    } else {
+        HAL_ASSERT(false);
+    }
+    PCR.sec_conf.sec_clk_sel = reg_val;
+}
+
+#ifdef __cplusplus
+}
+#endif