feat(rng): trng refactor to ll functions on esp32s31

components/hal/esp32s31/include/hal/trng_ll.h

@@ -0,0 +1,104 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "soc/soc.h"
+#include "soc/trng_struct.h"
+#include "soc/lp_peri_clkrst_struct.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Enable LP TRNG bus clock
+ */
+static inline void trng_ll_enable_bus_clock(bool enable)
+{
+    LP_PERI_CLKRST.rng_ctrl.lp_rng_clk_en = enable;
+}
+
+/**
+ * @brief Reset LP TRNG bus clock
+ *
+ */
+static inline void trng_ll_reset(void)
+{
+    LP_PERI_CLKRST.rng_ctrl.lp_rng_rst_en = 1;
+    LP_PERI_CLKRST.rng_ctrl.lp_rng_rst_en = 0;
+}
+
+/**
+ * @brief Enable or disable TRNG module clock
+ *
+ * @param enable true to enable, false to disable
+ */
+static inline void trng_ll_enable_clock(bool enable)
+{
+    LP_TRNG.date.clk_en = enable;
+}
+
+/**
+ * @brief Enable or disable TRNG sampling
+ *
+ * @param enable true to enable, false to disable
+ */
+static inline void trng_ll_enable_sample(bool enable)
+{
+    LP_TRNG.conf.sample_enable = enable;
+}
+
+/**
+ * @brief Enable or disable CRC RNG source
+ *
+ * @param enable true to enable CRC RNG, false to disable
+ */
+static inline void trng_ll_enable_noise_crc(bool enable)
+{
+    LP_TRNG.conf.noise_crc_en = enable;
+}
+
+/**
+ * @brief Read random data from TRNG
+ */
+static inline uint32_t trng_ll_read_data(void)
+{
+    return LP_TRNG.crc_sync_data.sw_crc_random_data_sync;
+}
+
+/**
+ * @brief Enable TRNG module
+ *
+ * TODO: unify in trng_hal.c
+ */
+static inline void trng_ll_enable(void)
+{
+    trng_ll_enable_bus_clock(true);
+    trng_ll_reset();
+    trng_ll_enable_clock(true);
+    trng_ll_enable_sample(true);
+    trng_ll_enable_noise_crc(true);
+}
+
+/**
+ * @brief Disable TRNG module
+ *
+ * TODO: unify in trng_hal.c
+ */
+static inline void trng_ll_disable(void)
+{
+    trng_ll_enable_sample(false);
+    trng_ll_enable_noise_crc(false);
+    trng_ll_enable_clock(false);
+    trng_ll_enable_bus_clock(false);
+}
+
+#ifdef __cplusplus
+}
+#endif