ARM: dts: colibri-imx7: add nodes related to the m4

Without these with a running M4 the kernel freezes early at memory
initialization time.
Note: There is no kernel output without earlycon.

| Colibri iMX7 # load mmc 0:1 $loadaddr ${m4dir}/${m4elf} ; bootaux $loadaddr
| 33420 bytes read in 44 ms (741.2 KiB/s)
| ## Starting auxiliary core stack = 0x00000000, pc = 0x1FFF80B5...
| Colibri iMX7 # boot
| MMC: no card present
| switch to partitions #0, OK
| mmc0(part 0) is current device
| Scanning mmc 0:1...
| Found U-Boot script /boot.scr
| 5125 bytes read in 14 ms (357.4 KiB/s)
| ## Executing script at 87000000
| Loading DeviceTree: imx7d-colibri-emmc-eval-v3.dtb
| 64305 bytes read in 17 ms (3.6 MiB/s)
| 126 bytes read in 10 ms (11.7 KiB/s)
| Applying Overlay: colibri-imx7_lcd-lt161010_overlay.dtbo
| 892 bytes read in 27 ms (32.2 KiB/s)
| Applying Overlay: colibri-imx7_ad7879_overlay.dtbo
| 423 bytes read in 25 ms (15.6 KiB/s)
| Applying Overlay: colibri-imx7_disable-uart-b_overlay.dtbo
| 295 bytes read in 31 ms (8.8 KiB/s)
| 6699784 bytes read in 225 ms (28.4 MiB/s)
| Bootargs: root=PARTUUID=fe6beb3d-02 ro rootwait console=tty1 console=ttymxc0,115200n8 consoleblank=0 clk_ignore_unused earlycon
| Kernel image @ 0x81000000 [ 0x000000 - 0x663b08 ]
| ## Flattened Device Tree blob at 82000000
|    Booting using the fdt blob at 0x82000000
|    Loading Device Tree to 8ffcd000, end 8fffffff ... OK
|
| Starting kernel ...
|
| [    0.000000] Booting Linux on physical CPU 0x0
| [    0.000000] Linux version 5.4.91-06328-ge364f07d31ea-dirty (krm@linuxdev2.toradex.int) (gcc version 10.2.1 20201103 (GNU Toolchain for the A-profile Architecture 10.2-2020.11 (arm-10.16))) #4 SMP Wed Mar 3 22:
| 03:45 CET 2021
| [    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
| [    0.000000] CPU: div instructions available: patching division code
| [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
| [    0.000000] OF: fdt: Machine model: Toradex Colibri iMX7D 1GB (eMMC) on Colibri Evaluation Board V3
| [    0.000000] earlycon: ec_imx6q0 at MMIO 0x30860000 (options '115200n8')
| [    0.000000] printk: bootconsole [ec_imx6q0] enabled
| [    0.000000] Memory policy: Data cache writealloc
| [    0.000000] cma: Reserved 256 MiB at 0xb0000000
| [    0.000000] 8<--- cut here ---
| [    0.000000] Unable to handle kernel paging request at virtual address 8ffcd000
| [    0.000000] pgd = (ptrval)
| [    0.000000] [8ffcd000] *pgd=8fe1141e(bad)
| [    0.000000] Internal error: Oops: 5 [#1] SMP ARM
| [    0.000000] Modules linked in:
| [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.4.91-06328-ge364f07d31ea-dirty #4
| [    0.000000] Hardware name: Freescale i.MX7 Dual (Device Tree)
| [    0.000000] PC is at fdt_check_header+0x0/0x138
| [    0.000000] LR is at __unflatten_device_tree+0x20/0x110
| [    0.000000] pc : [<80930b10>]    lr : [<8070c8a8>]    psr: a00000d3
| [    0.000000] sp : 80e01f38  ip : affffe58  fp : affffe00
| [    0.000000] r10: 00000000  r9 : 80d26314  r8 : 80ebcd8c
| [    0.000000] r7 : 00000000  r6 : 8ffcd000  r5 : 80e0afd4  r4 : 80d26314
| [    0.000000] r3 : 80d26314  r2 : 80ebcd8c  r1 : 00000000  r0 : 8ffcd000
| [    0.000000] Flags: NzCv  IRQs off  FIQs off  Mode SVC_32  ISA ARM  Segment none
| [    0.000000] Control: 10c5387d  Table: 8000406a  DAC: 00000051
| [    0.000000] Process swapper (pid: 0, stack limit = 0x(ptrval))
| [    0.000000] Stack: (0x80e01f38 to 0x80e02000)
| [    0.000000] 1f20:                                                       80d26314 80e0afd4
| [    0.000000] 1f40: 80e64180 80e09b40 90000000 80c500e0 80e157c4 80d272cc 00000000 80e0afd4
| [    0.000000] 1f60: 80d3367c 80d03654 ffffffff 10c5387d fffff000 80c50000 80ba67a8 80d3367c
| [    0.000000] 1f80: 410fc075 10c5387d 00000000 8016ab40 80ba516c 80e01fb4 00000000 80e64000
| [    0.000000] 1fa0: 00000051 80e05f00 00000000 00000001 410fc075 10c5387d 00000000 80d00968
| [    0.000000] 1fc0: 00000000 00000000 00000000 00000000 00000000 80d44a38 00000000 80d00330
| [    0.000000] 1fe0: 00000051 10c0387d 00000000 8ffcd000 410fc075 00000000 00000000 00000000
| [    0.000000] [<80930b10>] (fdt_check_header) from [<8070c8a8>] (__unflatten_device_tree+0x20/0x110)
| [    0.000000] [<8070c8a8>] (__unflatten_device_tree) from [<80d272cc>] (unflatten_device_tree+0x34/0x44)
| [    0.000000] [<80d272cc>] (unflatten_device_tree) from [<80d03654>] (setup_arch+0x8f0/0xb00)
| [    0.000000] [<80d03654>] (setup_arch) from [<80d00968>] (start_kernel+0x58/0x3e8)
| [    0.000000] [<80d00968>] (start_kernel) from [<00000000>] (0x0)
| [    0.000000] Code: e3a0001c e12fff1e e3a00020 e12fff1e (e5902000)
| [    0.000000] random: get_random_bytes called from print_oops_end_marker+0x28/0x50 with crng_init=0
| [    0.000000] ---[ end trace 0000000000000000 ]---
| [    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
| [    0.000000] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-colibri.dtsi
index 69b8c9f1e638..c3475cbdd37b 100644
--- a/arch/arm/boot/dts/imx7-colibri.dtsi
+++ b/arch/arm/boot/dts/imx7-colibri.dtsi
@@ -17,6 +17,11 @@
 		status = "okay";
 	};
 
+	m4_tcm: tcml@007f8000 {
+		compatible = "fsl, m4_tcml";
+		reg = <0x007f8000 0x8000>;
+	};
+
 	pxp_v4l2_out {
 		compatible = "fsl,imx7d-pxp-v4l2", "fsl,imx6sx-pxp-v4l2", \
 		             "fsl,imx6sl-pxp-v4l2";
@@ -39,6 +44,22 @@
 		regulator-always-on;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		m4_reserved: m4@0x9ff00000 {
+			no-map;
+			reg = <0x9ff00000 0x100000>;
+		};
+
+		rpmsg_reserved: rpmsg@0x8ff00000 {
+			no-map;
+			reg = <0x8ff00000 0x100000>;
+		};
+	};
+
 	sound {
 		compatible = "simple-audio-card";
 		simple-audio-card,name = "imx7-sgtl5000";