fix: SPI: get correct peripheral clock frequency

Fixes stm32duino#1380

Signed-off-by: Frederic Pillon <[email protected]>

Author: fpistm

libraries/SPI/src/utility/spi_com.c

@@ -60,6 +60,27 @@ uint32_t spi_getClkFreqInst(SPI_TypeDef *spi_inst)
   UNUSED(spi_inst);
   /* SPIx source CLK is PCKL1 */
   spi_freq = HAL_RCC_GetPCLK1Freq();
+#elif defined(STM32H7xx)
+  /* Get source clock depending on SPI instance */
+  if (spi_inst != NP) {
+    switch ((uint32_t)spi_inst) {
+      case (uint32_t)SPI1:
+      case (uint32_t)SPI2:
+      case (uint32_t)SPI3:
+        spi_freq = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SPI123);
+        break;
+      case (uint32_t)SPI4:
+      case (uint32_t)SPI5:
+        spi_freq = HAL_RCC_GetPCLK2Freq();
+        break;
+      case (uint32_t)SPI6:
+        spi_freq = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SPI6);
+        break;
+      default:
+        core_debug("CLK: SPI instance not set");
+        break;
+    }
+  }
 #elif defined(STM32MP1xx)
   /* Get source clock depending on SPI instance */
   if (spi_inst != NP) {