WIP: imx: hab: Make HAB support build for i.MX8MM

This is only a quick and compile-tested patch for making HAB build
on i.MX8MM.

There is still a load of warnings reported in arch/arm/mach-imx/hab.c.
It looks like this driver still needs work to get ready for ARM64.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>

arch/arm/include/asm/arch-imx8m/clock.h

@@ -275,3 +275,4 @@ void enable_ocotp_clk(unsigned char enable);
 int enable_i2c_clk(unsigned char enable, unsigned int i2c_num);
 int set_clk_enet(enum enet_freq type);
 int set_clk_eqos(enum enet_freq type);
+void hab_caam_clock_enable(unsigned char enable);

arch/arm/mach-imx/Makefile

@@ -47,9 +47,11 @@ ifneq ($(CONFIG_SPL_BUILD),y)
 obj-$(CONFIG_IMX_BOOTAUX) += imx_bootaux.o
 endif
 obj-$(CONFIG_SATA) += sata.o
-obj-$(CONFIG_IMX_HAB)    += hab.o
 obj-$(CONFIG_SYSCOUNTER_TIMER) += syscounter.o
 endif
+ifeq ($(SOC),$(filter $(SOC),mx6 mx7 imx8m))
+obj-$(CONFIG_IMX_HAB)    += hab.o
+endif
 ifeq ($(SOC),$(filter $(SOC),mx7ulp))
 obj-y  += cache.o mmdc_size.o
 obj-$(CONFIG_IMX_HAB) += hab.o

arch/arm/mach-imx/hab.c

@@ -660,6 +660,7 @@ int imx_hab_authenticate_image(uint32_t ddr_start, uint32_t image_size,
 	 * crash.
 	 */
 	/* Check MMU enabled */
+#if defined(CONFIG_MX6)
 	if (is_soc_type(MXC_SOC_MX6) && get_cr() & CR_M) {
 		if (is_mx6dq()) {
 			/*
@@ -676,6 +677,7 @@ int imx_hab_authenticate_image(uint32_t ddr_start, uint32_t image_size,
 			writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
 		}
 	}
+#endif
 
 	load_addr = (uint32_t)hab_rvt_authenticate_image(
 			HAB_CID_UBOOT,

arch/arm/mach-imx/imx8m/clock_imx8mm.c

@@ -928,3 +928,14 @@ int set_clk_enet(enum enet_freq type)
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_IMX_HAB
+void hab_caam_clock_enable(unsigned char enable)
+{
+	/*
+	 * According to the RM there is no separate clock gate
+	 * for the CAAM clock on i.MX8MM.
+	 */
+	return;
+}
+#endif