patches: fix stm32h7 ADC clock source

Should fix arduino-libraries/Arduino_GigaDisplayTouch#2

Author: facchinm

patches/0214-stm32h7-adc-use-CLKP-as-clock-source.patch

@@ -0,0 +1,49 @@
+From 10ac121c7e63d7abb856ec795b124dedf8dd9f49 Mon Sep 17 00:00:00 2001
+From: Martino Facchin <m.facchin@arduino.cc>
+Date: Thu, 2 Nov 2023 13:49:35 +0100
+Subject: [PATCH] stm32h7: adc: use CLKP as clock source
+
+Fixes analogRead() interferring with DSI/SDRAM
+---
+ .../TARGET_STM32H7/analogin_device.c          | 25 +------------------
+ 1 file changed, 1 insertion(+), 24 deletions(-)
+
+diff --git a/targets/TARGET_STM/TARGET_STM32H7/analogin_device.c b/targets/TARGET_STM/TARGET_STM32H7/analogin_device.c
+index be16b16cda..8b617e307a 100644
+--- a/targets/TARGET_STM/TARGET_STM32H7/analogin_device.c
++++ b/targets/TARGET_STM/TARGET_STM32H7/analogin_device.c
+@@ -36,30 +36,7 @@ void analogin_pll_configuration(void)
+ 
+     RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
+     PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_ADC;
+-    if(__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSI) {
+-        PeriphClkInitStruct.PLL2.PLL2M = 16;
+-        PeriphClkInitStruct.PLL2.PLL2N = 120;
+-    } else {
+-        #if HSE_VALUE==8000000
+-        PeriphClkInitStruct.PLL2.PLL2M = 2;
+-        PeriphClkInitStruct.PLL2.PLL2N = 120;
+-        #elif HSE_VALUE==16000000
+-        PeriphClkInitStruct.PLL2.PLL2M = 2;
+-        PeriphClkInitStruct.PLL2.PLL2N = 60;
+-        #elif HSE_VALUE==25000000
+-        PeriphClkInitStruct.PLL2.PLL2M = 5;
+-        PeriphClkInitStruct.PLL2.PLL2N = 96;
+-        #else
+-        error("HSE not configured properly");
+-        #endif
+-    }
+-    PeriphClkInitStruct.PLL2.PLL2P = 3;
+-    PeriphClkInitStruct.PLL2.PLL2Q = 4;
+-    PeriphClkInitStruct.PLL2.PLL2R = 2;
+-    PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_1;
+-    PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2VCOWIDE;
+-    PeriphClkInitStruct.PLL2.PLL2FRACN = 0;
+-    PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_PLL2;
++    PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_CLKP;
+     if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
+         error("analogin_init HAL_RCCEx_PeriphCLKConfig");
+     }
+-- 
+2.42.0
+