[PATCH] arm64: dts: ti: k3-am62d2-evm: Add support for OSPI flash

[Paresh Bhagat]

AM62D2 EVM has S28HS512T 64 MiB Octal SPI NOR flash connected to the
OSPI interface. Add support for the flash and describe the partition
information as per bootloader.

Signed-off-by: Paresh Bhagat <p-bhagat at ti.com>
---
Boot logs
https://gist.github.com/paresh-bhagat12/262d8c64e692d22c4e48363d246fb083

Tech Ref Manual-https://www.ti.com/lit/pdf/sprujd4
Schematics Link-https://www.ti.com/lit/zip/sprcal5

 arch/arm64/boot/dts/ti/k3-am62d2-evm.dts | 86 ++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
index daea18b0bc61..aa943ef52fb5 100644
--- a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
@@ -25,6 +25,7 @@ aliases {
 		rtc0 = &wkup_rtc0;
 		ethernet0 = &cpsw_port1;
 		ethernet1 = &cpsw_port2;
+		spi0 = &ospi0;
 	};
 
 	chosen {
@@ -367,6 +368,26 @@ usr_led_pins_default: usr-led-default-pins {
 			AM62DX_IOPAD(0x0244, PIN_INPUT, 7) /* (D18) MMC1_SDWP.GPIO1_49 */
 		>;
 	};
+
+	ospi0_pins_default: ospi0-default-pins {
+		pinctrl-single,pins = <
+			AM62DX_IOPAD(0x0000, PIN_OUTPUT, 0) /* (L22) OSPI0_CLK */
+			AM62DX_IOPAD(0x002c, PIN_OUTPUT, 0) /* (H21) OSPI0_CSn0 */
+			AM62DX_IOPAD(0x0030, PIN_OUTPUT, 0) /* (G19) OSPI0_CSn1 */
+			AM62DX_IOPAD(0x0034, PIN_OUTPUT, 0) /* (K20) OSPI0_CSn2 */
+			AM62DX_IOPAD(0x0038, PIN_OUTPUT, 0) /* (G20) OSPI0_CSn3 */
+			AM62DX_IOPAD(0x000c, PIN_INPUT, 0) /* (J21) OSPI0_D0 */
+			AM62DX_IOPAD(0x0010, PIN_INPUT, 0) /* (J18) OSPI0_D1 */
+			AM62DX_IOPAD(0x0014, PIN_INPUT, 0) /* (J19) OSPI0_D2 */
+			AM62DX_IOPAD(0x0018, PIN_INPUT, 0) /* (H18) OSPI0_D3 */
+			AM62DX_IOPAD(0x001c, PIN_INPUT, 0) /* (K21) OSPI0_D4 */
+			AM62DX_IOPAD(0x0020, PIN_INPUT, 0) /* (H19) OSPI0_D5 */
+			AM62DX_IOPAD(0x0024, PIN_INPUT, 0) /* (J20) OSPI0_D6 */
+			AM62DX_IOPAD(0x0028, PIN_INPUT, 0) /* (J22) OSPI0_D7 */
+			AM62DX_IOPAD(0x0008, PIN_INPUT, 0) /* (L21) OSPI0_DQS */
+		>;
+		bootph-all;
+	};
 };
 
 &mcu_gpio0 {
@@ -613,3 +634,68 @@ &c7x_0 {
 &main_rti4 {
 	status = "reserved";
 };
+
+&fss {
+	status = "okay";
+};
+
+&ospi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&ospi0_pins_default>;
+	status = "okay";
+
+	flash at 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 at 0 {
+				label = "ospi.tiboot3";
+				reg = <0x0 0x80000>;
+			};
+
+			partition at 80000 {
+				label = "ospi.tispl";
+				reg = <0x80000 0x200000>;
+			};
+
+			partition at 280000 {
+				label = "ospi.u-boot";
+				reg = <0x280000 0x400000>;
+			};
+
+			partition at 680000 {
+				label = "ospi.env";
+				reg = <0x680000 0x40000>;
+			};
+
+			partition at 6c0000 {
+				label = "ospi.env.backup";
+				reg = <0x6c0000 0x40000>;
+			};
+
+			partition at 800000 {
+				label = "ospi.rootfs";
+				reg = <0x800000 0x37c0000>;
+			};
+
+			partition at 3fc0000 {
+				label = "ospi.phypattern";
+				reg = <0x3fc0000 0x40000>;
+				bootph-all;
+			};
+		};
+	};
+};
-- 
2.34.1