boards: st: stm32n6570_dk: enable xspi psram

Enables XSPI PSRAM on the STM32N6570-DK board.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Author: gautierg-st

boards/st/stm32n6570_dk/doc/index.rst

@@ -95,6 +95,26 @@ Default Zephyr Peripheral Mapping:
 - USART_1_RX : PE6
 - USART_2_TX : PD5
 - USART_2_RX : PF6
+- XSPI1_NCS1 : PO0
+- XSPI1_DQS0 : PO2
+- XSPI1_DQS1 : PO3
+- XSPI1_CLK : PO4
+- XSPI1_IO0 : PP0
+- XSPI1_IO1 : PP1
+- XSPI1_IO2 : PP2
+- XSPI1_IO3 : PP3
+- XSPI1_IO4 : PP4
+- XSPI1_IO5 : PP5
+- XSPI1_IO6 : PP6
+- XSPI1_IO7 : PP7
+- XSPI1_IO8 : PP8
+- XSPI1_IO9 : PP9
+- XSPI1_IO10 : PP10
+- XSPI1_IO11 : PP11
+- XSPI1_IO12 : PP12
+- XSPI1_IO13 : PP13
+- XSPI1_IO14 : PP14
+- XSPI1_IO15 : PP15
 - XSPI2_NCS1 : PN1
 - XSPI2_DQS0 : PN0
 - XSPI2_CLK : PN6

boards/st/stm32n6570_dk/stm32n6570_dk_common.dtsi

@@ -23,6 +23,13 @@
 		led0 = &green_led_1;
 	};
 
+	psram: memory@90000000 {
+		compatible = "zephyr,memory-region";
+		reg = <0x90000000 DT_SIZE_M(32)>;
+		zephyr,memory-region = "PSRAM";
+		zephyr,memory-attr = <( DT_MEM_ARM(ATTR_MPU_RAM) )>;
+	};
+
 	leds: leds {
 		compatible = "gpio-leds";
 
@@ -159,6 +166,30 @@
 	status = "okay";
 };
 
+&xspi1 {
+	pinctrl-0 = <&xspim_p1_ncs1_po0 &xspim_p1_dqs0_po2
+		     &xspim_p1_dqs1_po3 &xspim_p1_clk_po4
+		     &xspim_p1_io0_pp0 &xspim_p1_io1_pp1 &xspim_p1_io2_pp2
+		     &xspim_p1_io3_pp3 &xspim_p1_io4_pp4 &xspim_p1_io5_pp5
+		     &xspim_p1_io6_pp6 &xspim_p1_io7_pp7 &xspim_p1_io8_pp8
+		     &xspim_p1_io9_pp9 &xspim_p1_io10_pp10 &xspim_p1_io11_pp11
+		     &xspim_p1_io12_pp12 &xspim_p1_io13_pp13 &xspim_p1_io14_pp14
+		     &xspim_p1_io15_pp15>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	memc: aps256xxn_obr: memory@90000000 {
+		compatible = "st,stm32-xspi-psram";
+		reg = <0x90000000 DT_SIZE_M(32)>; /* 256 Mbits */
+		fixed-latency;
+		io-x16-mode;
+		read-latency = <4>;
+		write-latency = <1>;
+		burst-length = <0>;
+		status = "okay";
+	};
+};
+
 &xspi2 {
 	pinctrl-0 = <&xspim_p2_ncs1_pn1 &xspim_p2_dqs0_pn0 &xspim_p2_clk_pn6
 		     &xspim_p2_io0_pn2 &xspim_p2_io1_pn3 &xspim_p2_io2_pn4

boards/st/stm32n6570_dk/twister.yaml

@@ -13,6 +13,7 @@ supported:
   - dma
   - i2c
   - gpio
+  - memc
   - spi
   - uart
 variants: