From 9878ad5c08ef26d60dba6562a84b9aeaddf40b6a Mon Sep 17 00:00:00 2001
From: Sinthu Raja <sinthu.raja@ti.com>
Date: Wed, 5 Jul 2023 16:16:45 +0530
Subject: [PATCH] arm: dts: k3-am68-sk: Add support for OSPI Flash

AM68 SK has an OSPI NOR flash on its SOM which is connected to the MCU
OSPI0 instance. Add support for the same and enable it in SPL and
U-Boot.

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
---
 .../arm/dts/k3-am68-sk-base-board-u-boot.dtsi | 25 ++++++
 arch/arm/dts/k3-am68-sk-r5-base-board.dts     |  5 ++
 arch/arm/dts/k3-am68-sk-som.dtsi              | 79 +++++++++++++++++++
 3 files changed, 109 insertions(+)

diff --git a/arch/arm/dts/k3-am68-sk-base-board-u-boot.dtsi b/arch/arm/dts/k3-am68-sk-base-board-u-boot.dtsi
index 262413d533..9f7e7374df 100644
--- a/arch/arm/dts/k3-am68-sk-base-board-u-boot.dtsi
+++ b/arch/arm/dts/k3-am68-sk-base-board-u-boot.dtsi
@@ -21,6 +21,7 @@
 		i2c3 = &main_i2c0;
 		ethernet0 = &cpsw_port1;
 		mmc1 = &main_sdhci1;
+		spi0 = &ospi0;
 	};
 };
 
@@ -156,6 +157,30 @@
 	};
 };
 
+&fss {
+	bootph-pre-ram;
+};
+
+&mcu_fss0_ospi0_pins_default {
+	bootph-pre-ram;
+};
+
+&ospi0 {
+	bootph-pre-ram;
+
+	ospi0_nor: flash@0 {
+		bootph-pre-ram;
+
+		partition@3fc0000 {
+			bootph-pre-ram;
+		};
+	};
+};
+
+&ospi0_nor {
+	bootph-pre-ram;
+};
+
 &serdes_ln_ctrl {
 	u-boot,mux-autoprobe;
 };
diff --git a/arch/arm/dts/k3-am68-sk-r5-base-board.dts b/arch/arm/dts/k3-am68-sk-r5-base-board.dts
index a64baba149..32c30e14ff 100644
--- a/arch/arm/dts/k3-am68-sk-r5-base-board.dts
+++ b/arch/arm/dts/k3-am68-sk-r5-base-board.dts
@@ -191,4 +191,9 @@
 	ti,sci = <&dm_tifs>;
 };
 
+&ospi0 {
+	reg = <0x0 0x47040000 0x0 0x100>,
+	      <0x0 0x50000000 0x0 0x8000000>;
+};
+
 #include "k3-am68-sk-base-board-u-boot.dtsi"
diff --git a/arch/arm/dts/k3-am68-sk-som.dtsi b/arch/arm/dts/k3-am68-sk-som.dtsi
index cb1c58fcd1..023f07c480 100644
--- a/arch/arm/dts/k3-am68-sk-som.dtsi
+++ b/arch/arm/dts/k3-am68-sk-som.dtsi
@@ -30,6 +30,85 @@
 	};
 };
 
+&wkup_pmx0 {
+	mcu_fss0_ospi0_pins_default: mcu-fss0-ospi0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x000, PIN_OUTPUT, 0) /* (D19) MCU_OSPI0_CLK */
+			J721S2_WKUP_IOPAD(0x02c, PIN_OUTPUT, 0) /* (F15) MCU_OSPI0_CSn0 */
+			J721S2_WKUP_IOPAD(0x03c, PIN_OUTPUT, 0) /* (F17) MCU_OSPI0_CSn3 */
+			J721S2_WKUP_IOPAD(0x00c, PIN_INPUT, 0) /* (C19) MCU_OSPI0_D0 */
+			J721S2_WKUP_IOPAD(0x010, PIN_INPUT, 0) /* (F16) MCU_OSPI0_D1 */
+			J721S2_WKUP_IOPAD(0x014, PIN_INPUT, 0) /* (G15) MCU_OSPI0_D2 */
+			J721S2_WKUP_IOPAD(0x018, PIN_INPUT, 0) /* (F18) MCU_OSPI0_D3 */
+			J721S2_WKUP_IOPAD(0x01c, PIN_INPUT, 0) /* (E19) MCU_OSPI0_D4 */
+			J721S2_WKUP_IOPAD(0x020, PIN_INPUT, 0) /* (G19) MCU_OSPI0_D5 */
+			J721S2_WKUP_IOPAD(0x024, PIN_INPUT, 0) /* (F19) MCU_OSPI0_D6 */
+			J721S2_WKUP_IOPAD(0x028, PIN_INPUT, 0) /* (F20) MCU_OSPI0_D7 */
+			J721S2_WKUP_IOPAD(0x008, PIN_INPUT, 0) /* (E18) MCU_OSPI0_DQS */
+			J721S2_WKUP_IOPAD(0x004, PIN_INPUT, 0) /* (E20) MCU_OSPI0_LBCLKO */
+		>;
+	};
+};
+
+&ospi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_fss0_ospi0_pins_default>;
+
+	ospi0_nor: flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0x0>;
+		spi-tx-bus-width = <8>;
+		spi-rx-bus-width = <8>;
+		spi-max-frequency = <25000000>;
+		cdns,tshsl-ns = <60>;
+		cdns,tsd2d-ns = <60>;
+		cdns,tchsh-ns = <60>;
+		cdns,tslch-ns = <60>;
+		cdns,read-delay = <4>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ospi.tiboot3";
+				reg = <0x0 0x80000>;
+			};
+
+			partition@80000 {
+				label = "ospi.tispl";
+				reg = <0x80000 0x200000>;
+			};
+
+			partition@280000 {
+				label = "ospi.u-boot";
+				reg = <0x280000 0x400000>;
+			};
+
+			partition@680000 {
+				label = "ospi.env";
+				reg = <0x680000 0x40000>;
+			};
+
+			partition@6c0000 {
+				label = "ospi.env.backup";
+				reg = <0x6c0000 0x40000>;
+			};
+
+			partition@800000 {
+				label = "ospi.rootfs";
+				reg = <0x800000 0x37c0000>;
+			};
+
+			partition@3fc0000 {
+				label = "ospi.phypattern";
+				reg = <0x3fc0000 0x40000>;
+			};
+		};
+	};
+};
+
 &mailbox0_cluster0 {
 	status = "disabled";
 };