feat(driver_twai): add api to get onchip hardware timing limit

components/esp_driver_twai/include/esp_private/twai_utils.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2025-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -11,22 +11,6 @@
 extern "C" {
 #endif
 
-/**
- * @brief TWAI hardware-dependent bit-timing constant
- *
- * Used for calculating and checking bit-timing parameters
- */
-typedef struct {
-    uint32_t brp_min;   /* Bit-rate prescaler */
-    uint32_t brp_max;
-    uint8_t prop_max;   /* Propagation segment */
-    uint8_t tseg1_min;  /* Time segment 1 = prop_seg + phase_seg1 */
-    uint8_t tseg1_max;
-    uint8_t tseg2_min;  /* Time segment 2 = phase_seg2 */
-    uint8_t tseg2_max;
-    uint8_t sjw_max;    /* Synchronisation jump width */
-} twai_timing_constraint_t;
-
 /**
  * @brief Calculate TWAI timing parameters for a given source frequency and baud rate.
  *
@@ -40,7 +24,7 @@ typedef struct {
  * @param out_param Pointer to the output structure where the calculated timing parameters will be stored.
  * @return the actual hardware adopted baudrate.
  */
-uint32_t twai_node_timing_calc_param(const uint32_t source_freq, const twai_timing_basic_config_t *in_param, const twai_timing_constraint_t *hw_limit, twai_timing_advanced_config_t *out_param);
+uint32_t twai_node_timing_calc_param(const uint32_t source_freq, const twai_timing_basic_config_t *in_param, const twai_timing_limits_t *hw_limit, twai_timing_advanced_config_t *out_param);
 
 #ifdef __cplusplus
 }

components/esp_driver_twai/include/esp_twai_onchip.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2024-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -101,6 +101,15 @@ static inline twai_mask_filter_config_t twai_make_dual_filter(uint32_t id1, uint
     return dual_cfg;
 }
 
+/**
+ * @brief Get the hardware-dependent timing limits
+ *
+ * @param[in]  is_fd          True for FD data timing, false for classic timing
+ * @param[out] timing_limits  Pointer to timing limits structure
+ * @return ESP_OK if successful, ESP_ERR_INVALID_ARG if invalid argument
+ */
+esp_err_t twai_node_onchip_get_timing_limits(bool is_fd, twai_timing_limits_t *timing_limits);
+
 #ifdef __cplusplus
 }
 #endif