Use strong drive and hysteresis for FlexSPI2 pins

teensy4/startup.c

@@ -307,14 +307,14 @@ FLASHMEM static uint32_t flexspi2_psram_id(uint32_t addr)
 FLASHMEM void configure_external_ram()
 {
 	// initialize pins
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_22 = 0xB0E1; // 100K pullup, medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_23 = 0x10E1; // keeper, medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_24 = 0xB0E1; // 100K pullup, medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_25 = 0x00E1; // medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_26 = 0x70E1; // 47K pullup, medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_27 = 0x70E1; // 47K pullup, medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_28 = 0x70E1; // 47K pullup, medium drive, max speed
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_29 = 0x70E1; // 47K pullup, medium drive, max speed
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_22 = 0x1B0F9; // 100K pullup, strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_23 = 0x110F9; // keeper, strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_24 = 0x1B0F9; // 100K pullup, strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_25 = 0x100F9; // strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_26 = 0x170F9; // 47K pullup, strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_27 = 0x170F9; // 47K pullup, strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_28 = 0x170F9; // 47K pullup, strong drive, max speed, hyst
+	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_29 = 0x170F9; // 47K pullup, strong drive, max speed, hyst
 
 	IOMUXC_SW_MUX_CTL_PAD_GPIO_EMC_22 = 8 | 0x10; // ALT1 = FLEXSPI2_A_SS1_B (Flash)
 	IOMUXC_SW_MUX_CTL_PAD_GPIO_EMC_23 = 8 | 0x10; // ALT1 = FLEXSPI2_A_DQS