fix(i2c): make write_buffer const in i2c_master_transmit_multi_buffer_info_t

Fixes espressif#16890

Author: ginkgm

components/esp_driver_i2c/i2c_master.c

@@ -1225,7 +1225,7 @@ esp_err_t i2c_master_transmit(i2c_master_dev_handle_t i2c_dev, const uint8_t *wr
     ESP_RETURN_ON_FALSE((write_buffer != NULL) && (write_size > 0), ESP_ERR_INVALID_ARG, TAG, "i2c transmit buffer or size invalid");
 
     i2c_master_transmit_multi_buffer_info_t buffer_info[1] = {
-        {.write_buffer = (uint8_t*)write_buffer, .buffer_size = write_size},
+        {.write_buffer = write_buffer, .buffer_size = write_size},
     };
     return i2c_master_multi_buffer_transmit(i2c_dev, buffer_info, 1, xfer_timeout_ms);
 }

components/esp_driver_i2c/include/driver/i2c_master.h

@@ -90,7 +90,7 @@ typedef struct {
  * @brief I2C master transmit buffer information structure
  */
 typedef struct {
-    uint8_t *write_buffer;               /*!< Pointer to buffer to be written. */
+    const uint8_t *write_buffer;         /*!< Pointer to buffer to be written. */
     size_t buffer_size;                  /*!< Size of data to be written. */
 } i2c_master_transmit_multi_buffer_info_t;