arm: mach-k3: Introduce the basic files to support AM62

The AM62 SoC family is the follow on AM335x built on K3 Multicore SoC
architecture platform, providing ultra-low-power modes, dual display,
multi-sensor edge compute, security and other BOM-saving integration.
The AM62 SoC targets broad market to enable applications such as
Industrial HMI, PLC/CNC/Robot control, Medical Equipment, Building
Automation, Appliances and more.

Some highlights of this SoC are:

* Quad-Cortex-A53s (running up to 1.4GHz) in a single cluster.
  Pin-to-pin compatible options for single and quad core are available.
* Cortex-M4F for general-purpose or safety usage.
* Dual display support, providing 24-bit RBG parallel interface and
  OLDI/LVDS-4 Lane x2, up to 200MHz pixel clock support for 2K display
  resolution.
* Selectable GPUsupport, up to 8GFLOPS, providing better user experience
  in 3D graphic display case and Android.
* PRU(Programmable Realtime Unit) support for customized programmable
  interfaces/IOs.
* Integrated Giga-bit Ethernet switch supporting up to a total of two
  external ports (TSN capable).
* 9xUARTs, 5xSPI, 6xI2C, 2xUSB2, 3xCAN-FD, 3x eMMC and SD, GPMC for
  NAND/FPGA connection, OSPI memory controller, 3xMcASP for audio,
  1x CSI-RX-4L for Camera, eCAP/eQEP, ePWM, among other peripherals.
* Dedicated Centralized System Controller for Security, Power, and
  Resource Management.
* Multiple low power modes support, ex: Deep sleep,Standby, MCU-only,
  enabling battery powered system design.

AM625 is the first device of the family. Add DT bindings for the same.

More details can be found in the Technical Reference Manual:
https://www.ti.com/lit/pdf/spruiv7

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Gowtham Tammana <g-tammana@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index a01bf23..0dc4f44 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -16,6 +16,9 @@
 config SOC_K3_AM642
 	bool "TI's K3 based AM642 SoC Family Support"
 
+config SOC_K3_AM625
+	bool "TI's K3 based AM625 SoC Family Support"
+
 endchoice
 
 config SYS_SOC
@@ -26,6 +29,7 @@
 	default 0x80000 if SOC_K3_AM6
 	default 0x100000 if SOC_K3_J721E || SOC_K3_J721S2
 	default 0x1c0000 if SOC_K3_AM642
+	default 0x3c000 if SOC_K3_AM625
 	help
 	  Describes the total size of the MCU or OCMC MSRAM present on
 	  the SoC in use. This doesn't specify the total size of SPL as
@@ -37,6 +41,7 @@
 	default 0x58000 if SOC_K3_AM6
 	default 0xc0000 if SOC_K3_J721E || SOC_K3_J721S2
 	default 0x180000 if SOC_K3_AM642
+	default 0x38000 if SOC_K3_AM625
 	help
 	  Describes the maximum size of the image that ROM can download
 	  from any boot media.
@@ -61,6 +66,7 @@
 	default 0x41cffbfc if SOC_K3_J721E
 	default 0x41cfdbfc if SOC_K3_J721S2
 	default 0x701bebfc if SOC_K3_AM642
+	default 0x43c3f290 if SOC_K3_AM625
 	help
 	  Address at which ROM stores the value which determines if SPL
 	  is booted up by primary boot media or secondary boot media.
@@ -129,6 +135,7 @@
 config K3_SYSFW_IMAGE_SIZE_MAX
 	int "Amount of memory dynamically allocated for loading SYSFW blob"
 	depends on K3_LOAD_SYSFW
+	default 163840 if SOC_K3_AM625
 	default	278000
 	help
 	  Amount of memory (in bytes) reserved through dynamic allocation at
@@ -160,7 +167,7 @@
 
 config K3_DM_FW
 	bool "Separate DM firmware image"
-	depends on SPL && CPU_V7R && (SOC_K3_J721E || SOC_K3_J721S2) && !CLK_TI_SCI && !TI_SCI_POWER_DOMAIN
+	depends on SPL && CPU_V7R && (SOC_K3_J721E || SOC_K3_J721S2 || SOC_K3_AM625) && !CLK_TI_SCI && !TI_SCI_POWER_DOMAIN
 	default y
 	help
 	  Enabling this will indicate that the system has separate DM