package/freescale-imx: add i.MX91 and i.MX93 SoC support

This commit adds i.MX91 and i.MX93 support to Buildroot.
https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/i-mx-applications-processors/i-mx-9-processors:IMX9-PROCESSORS

There is no i.MX95 software provided by NXP at the moment that's why
i.MX95 is left behind.

Adapt package firmware-imx for the LPPDR4 firmware binaries. The i.MX91
and i.MX93 only support LPDDR4 and LPDDR4x, but using different binaries
than i.MX8. For simplicity, use a completely separate code path for
i.MX91 and i.MX93, using the symbol
BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9. There is only one type of
firmware supported, so there's no need for a choice or for selecting the
version (at least for now).

Reviewed-by: Gary Bisson <bisson.gary@gmail.com>
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
[Arnout:
 - Remove BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX91A1 option.
 - Re-wrap help text.
 - Introduce BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9 instead of
   reusing BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW.
 - Create completely separate instance of
   FIRMWARE_IMX_INSTALL_IMAGE_DDR_FW for
   BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9.
 - Drop the training binaries choice for IMX9.
 - Drop the firmware version option for IMX9.
 - Keep options for IMEM and DMEM padding.
]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/freescale-imx/Config.in

@@ -61,6 +61,30 @@ config BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8X
 config BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8DXL
 	bool "imx8dxl"
 
+config BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX91
+	bool "imx91"
+
+config BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93
+	bool "imx93"
+
+endchoice
+
+choice
+	prompt "i.MX Silicon Revision"
+	default BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93A1
+	depends on BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93
+	help
+	  Some packages related to the selected i.MX platform need to
+	  know the silicon revision of the platform they will run on.
+
+	  Note - mismatches may result in a failure to boot!
+
+config BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93A0
+	bool "imx93a0"
+
+config BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93A1
+	bool "imx93a1"
+
 endchoice
 
 config BR2_PACKAGE_FREESCALE_IMX_PLATFORM
@@ -80,6 +104,8 @@ config BR2_PACKAGE_FREESCALE_IMX_PLATFORM
 	default "IMX8MM" if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8MM
 	default "IMX8MN" if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8MN
 	default "IMX8MP" if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8MP
+	default "IMX91" if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX91
+	default "IMX93" if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93
 
 config BR2_PACKAGE_FREESCALE_IMX_HAS_VPU
 	bool

package/freescale-imx/firmware-imx/Config.in

@@ -56,6 +56,11 @@ config BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW
 	default y if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8MN
 	default y if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8MP
 
+config BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9
+	bool
+	default y if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX91
+	default y if BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX93
+
 if BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW
 
 choice
@@ -93,6 +98,10 @@ config BR2_PACKAGE_FIRMWARE_IMX_DDR_VERSION
 	  Use a specific version of the imx ddr binaries. Leaving this
 	  field empty will select the default version.
 
+endif # BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW
+
+if BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW || BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9
+
 config BR2_PACKAGE_FIRMWARE_IMX_IMEM_LEN
 	hex "(LP)DDR IMEM padding length"
 	default 0x8000
@@ -105,6 +114,6 @@ config BR2_PACKAGE_FIRMWARE_IMX_DMEM_LEN
 	help
 	  The DMEM firmware will be padded to this length
 
-endif # BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW
+endif # BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW || BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9
 
 endif # BR2_PACKAGE_FIRMWARE_IMX

package/freescale-imx/firmware-imx/firmware-imx.mk

@@ -45,6 +45,33 @@ ifneq ($(FIRMWARE_IMX_DDR_VERSION),)
 FIRMWARE_IMX_DDR_VERSION_SUFFIX = _$(FIRMWARE_IMX_DDR_VERSION)
 endif
 
+ifeq ($(BR2_PACKAGE_FIRMWARE_IMX_NEEDS_DDR_FW_IMX9),y)
+FIRMWARE_IMX_DDRFW_DIR = $(@D)/firmware/ddr/synopsys
+
+define FIRMWARE_IMX_INSTALL_IMAGE_DDR_FW
+	# Create padded versions of lpddr4_{d,i}mem_{1,2}d_* and generate lpddr4_fw.bin.
+	# lpddr4_fw.bin is needed when generating imx9-boot-sd.bin
+	# which is done in post-image script.
+	$(call FIRMWARE_IMX_PREPARE_DDR_FW, \
+		lpddr4_imem_1d_v202201,
+		lpddr4_dmem_1d_v202201,
+		lpddr4_1d_fw)
+	$(call FIRMWARE_IMX_PREPARE_DDR_FW, \
+		lpddr4_imem_2d_v202201,
+		lpddr4_dmem_2d_v202201,
+		lpddr4_2d_fw)
+	cat $(FIRMWARE_IMX_DDRFW_DIR)/lpddr4_1d_fw.bin \
+		$(FIRMWARE_IMX_DDRFW_DIR)/lpddr4_2d_fw.bin > \
+		$(BINARIES_DIR)/lpddr4_fw.bin
+	ln -sf $(BINARIES_DIR)/lpddr4_fw.bin $(BINARIES_DIR)/ddr_fw.bin
+
+	# U-Boot supports creation of the combined flash.bin image. To make
+	# sure that U-Boot can access all available files copy them to
+	# the binary dir.
+	cp $(FIRMWARE_IMX_DDRFW_DIR)/lpddr4*.bin $(BINARIES_DIR)/
+endef
+endif
+
 ifeq ($(BR2_PACKAGE_FIRMWARE_IMX_LPDDR4),y)
 FIRMWARE_IMX_DDRFW_DIR = $(@D)/firmware/ddr/synopsys