Clarify documentation of internal hash software driver interface

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>

library/psa_crypto_hash.h

@@ -75,6 +75,11 @@ typedef struct
 #define MBEDTLS_PSA_HASH_OPERATION_INIT {0, {0}}
 
 /** Calculate the hash (digest) of a message using Mbed TLS routines.
+ *
+ * \note The signature of this function is that of a PSA driver hash_compute
+ *       entry point. This function behaves as a hash_compute entry point as
+ *       defined in the PSA driver interface specification for transparent
+ *       drivers.
  *
  * \param alg               The hash algorithm to compute (\c PSA_ALG_XXX value
  *                          such that #PSA_ALG_IS_HASH(\p alg) is true).
@@ -89,15 +94,11 @@ typedef struct
  * \retval #PSA_SUCCESS
  *         Success.
  * \retval #PSA_ERROR_NOT_SUPPORTED
- *         \p alg is not supported or is not a hash algorithm.
- * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         \p alg is not supported
  * \retval #PSA_ERROR_BUFFER_TOO_SMALL
  *         \p hash_size is too small
  * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
- * \retval #PSA_ERROR_COMMUNICATION_FAILURE
- * \retval #PSA_ERROR_HARDWARE_FAILURE
  * \retval #PSA_ERROR_CORRUPTION_DETECTED
- * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
  */
 psa_status_t mbedtls_psa_hash_compute(
     psa_algorithm_t alg,
@@ -108,6 +109,11 @@ psa_status_t mbedtls_psa_hash_compute(
     size_t *hash_length);
 
 /** Set up a multipart hash operation using Mbed TLS routines.
+ *
+ * \note The signature of this function is that of a PSA driver hash_setup
+ *       entry point. This function behaves as a hash_setup entry point as
+ *       defined in the PSA driver interface specification for transparent
+ *       drivers.
  *
  * If an error occurs at any step after a call to mbedtls_psa_hash_setup(), the
  * operation will need to be reset by a call to mbedtls_psa_hash_abort(). The
@@ -128,7 +134,7 @@ psa_status_t mbedtls_psa_hash_compute(
  * \retval #PSA_SUCCESS
  *         Success.
  * \retval #PSA_ERROR_NOT_SUPPORTED
- *         \p alg is not a supported hash algorithm.
+ *         \p alg is not supported
  * \retval #PSA_ERROR_BAD_STATE
  *         The operation state is not valid (it must be inactive).
  * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
@@ -139,6 +145,11 @@ psa_status_t mbedtls_psa_hash_setup(
     psa_algorithm_t alg );
 
 /** Clone an Mbed TLS hash operation.
+ *
+ * \note The signature of this function is that of a PSA driver hash_clone
+ *       entry point. This function behaves as a hash_clone entry point as
+ *       defined in the PSA driver interface specification for transparent
+ *       drivers.
  *
  * This function copies the state of an ongoing hash operation to
  * a new operation object. In other words, this function is equivalent
@@ -166,6 +177,11 @@ psa_status_t mbedtls_psa_hash_clone(
     mbedtls_psa_hash_operation_t *target_operation );
 
 /** Add a message fragment to a multipart Mbed TLS hash operation.
+ *
+ * \note The signature of this function is that of a PSA driver hash_update
+ *       entry point. This function behaves as a hash_update entry point as
+ *       defined in the PSA driver interface specification for transparent
+ *       drivers.
  *
  * The application must call mbedtls_psa_hash_setup() before calling this function.
  *
@@ -179,7 +195,7 @@ psa_status_t mbedtls_psa_hash_clone(
  * \retval #PSA_SUCCESS
  *         Success.
  * \retval #PSA_ERROR_BAD_STATE
- *         The operation state is not valid (it muct be active).
+ *         The operation state is not valid (it must be active).
  * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
  * \retval #PSA_ERROR_CORRUPTION_DETECTED
  */
@@ -189,6 +205,11 @@ psa_status_t mbedtls_psa_hash_update(
     size_t input_length );
 
 /** Finish the calculation of the Mbed TLS-calculated hash of a message.
+ *
+ * \note The signature of this function is that of a PSA driver hash_finish
+ *       entry point. This function behaves as a hash_finish entry point as
+ *       defined in the PSA driver interface specification for transparent
+ *       drivers.
  *
  * The application must call mbedtls_psa_hash_setup() before calling this function.
  * This function calculates the hash of the message formed by concatenating
@@ -224,6 +245,11 @@ psa_status_t mbedtls_psa_hash_finish(
     size_t *hash_length );
 
 /** Abort an Mbed TLS hash operation.
+ *
+ * \note The signature of this function is that of a PSA driver hash_abort
+ *       entry point. This function behaves as a hash_abort entry point as
+ *       defined in the PSA driver interface specification for transparent
+ *       drivers.
  *
  * Aborting an operation frees all associated resources except for the
  * \p operation structure itself. Once aborted, the operation object