arm: imx9: Add i.MX952 SoC support

Add basic SoC support for i.MX952:
- Add CONFIG_IMX952 Kconfig option
- Include i.MX952 clock and power headers
- Set CPU speed grade to 1.7GHz for i.MX952

Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: David Zang <davidzangcs@gmail.com>

arch/arm/mach-imx/imx9/Kconfig

@@ -47,6 +47,15 @@ config IMX94
 	select SCMI_FIRMWARE
 	select SPL_IMX_CONTAINER_USE_TRAMPOLINE
 
+config IMX952
+	bool
+	select ARMV8_SPL_EXCEPTION_VECTORS
+	select DM_MAILBOX
+	select IMX9
+	select IMX_PQC_SUPPORT
+	select SCMI_FIRMWARE
+	select SPL_IMX_CONTAINER_USE_TRAMPOLINE
+
 config SYS_SOC
 	default "imx9"
 

arch/arm/mach-imx/imx9/scmi/common.h

@@ -21,6 +21,16 @@
 
 #define IMX95_PD_M70 IMX95_PD_M7
 #endif
+#ifdef CONFIG_IMX952
+#define IMX_PLAT 952
+#include <imx952-clock.h>
+#include <imx952-power.h>
+
+#define IMX952_CLK_SEL_A55C0 IMX952_CLK_GPR_SEL_A55C0
+#define IMX952_PD_M70 IMX952_PD_M7
+#define IMX952_CLK_FLEXSPI1 IMX952_CLK_XSPI1
+#define IMX952_CLK_24M IMX952_CLK_OSC24M
+#endif
 
 #define IMX_PLAT_STR__(plat) # plat
 #define IMX_PLAT_STR_(IMX_PLAT) IMX_PLAT_STR__(IMX_PLAT)

arch/arm/mach-imx/imx9/scmi/soc.c

@@ -153,6 +153,8 @@ u32 get_cpu_speed_grade_hz(void)
 
 	if (is_imx95())
 		max_speed = 2000000000;
+	if (is_imx952())
+		max_speed = 1700000000;
 
 	/* In case the fuse of speed grade not programmed */
 	if (speed > max_speed)