[PATCH/RFC] ARM: dts: marzen: Add FLASH node
Geert Uytterhoeven
geert+renesas at glider.be
Mon Mar 20 09:43:08 PDT 2023
Add a device node for the Spansion S29GL512N NOR FLASH on the Marzen
development board.
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
Although the S29GL512N is a CFI FLASH, using "cfi-flash" instead of
"mtd-rom" does not work:
1. Probing fails with "physmap-flash 0.flash: map_probe failed",
2. The kernel crashes later in a spectacular way, cfr. the logs below.
U-Boot flinfo says:
Bank # 1: CFI conformant flash (16 x 16) Size: 64 MB in 512 Sectors
AMD Standard command set, Manufacturer ID: 0x01, Device ID: 0x227E
Erase timeout: 4096 ms, write timeout: 1 ms
Buffer write timeout: 3 ms, buffer size: 64 bytes
Sector Start Addresses:
00000000 RO 00020000 00040000 RO 00060000 RO 00080000
000A0000 000C0000 000E0000 00100000 00120000
00140000 00160000 00180000 001A0000 001C0000
...
03FC0000 03FE0000
Bank # 2: missing or unknown FLASH type
Does anyone have a clue? Using "mtd-rom", I can at least read the FLASH
under Linux.
Thanks in advance!
Crash logs:
WARNING: bad unlock balance detected!
6.3.0-rc1-marzen-02372-g053d8eb1df8a-dirty #29 Not tainted
-------------------------------------
rcS/66 is trying to release lock ((null)) at:
[<c011f038>] copy_process+0x1120/0x193c
but there are no more locks to release!
other info that might help us debug this:
1 lock held by rcS/66:
#0: c28008d8 (&mm->mmap_lock){++++}-{3:3}, at: copy_process+0xcc4/0x193c
stack backtrace:
CPU: 0 PID: 66 Comm: rcS Not tainted 6.3.0-rc1-marzen-02372-g053d8eb1df8a-dirty #29
Hardware name: Generic R8A7779 (Flattened Device Tree)
unwind_backtrace from show_stack+0x10/0x14
show_stack from dump_stack_lvl+0x68/0x90
dump_stack_lvl from lock_release+0x168/0x328
lock_release from up_write+0x20/0x244
up_write from copy_process+0x1120/0x193c
copy_process from kernel_clone+0xa0/0x2e4
kernel_clone from sys_clone+0x6c/0x94
sys_clone from ret_fast_syscall+0x0/0x1c
Exception stack(0xf0a2dfa8 to 0xf0a2dff0)
dfa0: 00200068 bed21738 01200011 00000000 00000000 00000000
dfc0: 00200068 bed21738 00000042 00000078 00000000 00200000 0020123c bed2176c
dfe0: 002004c0 bed21738 00000000 00119664
------------[ cut here ]------------
WARNING: CPU: 0 PID: 66 at kernel/locking/rwsem.c:1364 up_write+0x98/0x244
DEBUG_RWSEMS_WARN_ON(sem->magic != sem): count = 0x0, magic = 0x0, owner = 0x0, curr 0xc27b04c0, list not empty
Modules linked in:
CPU: 0 PID: 66 Comm: rcS Not tainted 6.3.0-rc1-marzen-02372-g053d8eb1df8a-dirty #29
Hardware name: Generic R8A7779 (Flattened Device Tree)
unwind_backtrace from show_stack+0x10/0x14
show_stack from dump_stack_lvl+0x68/0x90
dump_stack_lvl from __warn+0x7c/0x1c0
__warn from warn_slowpath_fmt+0xec/0x138
warn_slowpath_fmt from up_write+0x98/0x244
up_write from copy_process+0x1120/0x193c
copy_process from kernel_clone+0xa0/0x2e4
kernel_clone from sys_clone+0x6c/0x94
sys_clone from ret_fast_syscall+0x0/0x1c
Exception stack(0xf0a2dfa8 to 0xf0a2dff0)
dfa0: 00200068 bed21738 01200011 00000000 00000000 00000000
dfc0: 00200068 bed21738 00000042 00000078 00000000 00200000 0020123c bed2176c
dfe0: 002004c0 bed21738 00000000 00119664
irq event stamp: 1863
hardirqs last enabled at (1863): [<c026c664>] kmem_cache_free+0x130/0x158
hardirqs last disabled at (1862): [<c026c614>] kmem_cache_free+0xe0/0x158
softirqs last enabled at (1624): [<c0101474>] __do_softirq+0x178/0x3e8
softirqs last disabled at (1611): [<c01276f0>] __irq_exit_rcu+0x110/0x168
---[ end trace 0000000000000000 ]---
or:
WARNING: bad unlock balance detected!
6.3.0-rc1-marzen-02372-g053d8eb1df8a-dirty #27 Not tainted
-------------------------------------
systemd/1 is trying to release lock (
8<--- cut here ---
Unable to handle kernel paging request at virtual address 4e22202c when read
[4e22202c] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 2 PID: 1 Comm: systemd Not tainted 6.3.0-rc1-marzen-02372-g053d8eb1df8a-dirty #27
Hardware name: Generic R8A7779 (Flattened Device Tree)
PC is at string_nocheck+0x44/0x64
LR is at 0xffffffff
pc : [<c080ac48>] lr : [<ffffffff>] psr: 000f0093
sp : f0829a28 ip : f0829af4 fp : c0b13875
r10: 00000008 r9 : f0829a7c r8 : f0829aec
r7 : f0829af4 r6 : f0829b7c r5 : 4e22202c r4 : f0829af4
r3 : ffffff04 r2 : 4e22202c r1 : 00000000 r0 : f0829aee
Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c5387d Table: 6332004a DAC: 00000051
Register r0 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Register r1 information: NULL pointer
Register r2 information: non-paged memory
Register r3 information: non-paged memory
Register r4 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Register r5 information: non-paged memory
Register r6 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Register r7 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Register r8 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Register r9 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Register r10 information: non-paged memory
Register r11 information: non-slab/vmalloc memory
Register r12 information: 2-page vmalloc region starting at 0xf0828000 allocated at kernel_clone+0xa0/0x2e4
Process systemd (pid: 1, stack limit = 0x(ptrval))
Stack: (0xf0829a28 to 0xf082a000)
9a20: f0829aee f0829af4 4e22202c c080c990 c18c0918 ffffff04
[...]
string_nocheck from string+0x54/0x64
string from vsnprintf+0x220/0x36c
vsnprintf from vprintk_store+0x130/0x3b4
vprintk_store from vprintk_emit+0xa8/0x23c
vprintk_emit from vprintk_default+0x1c/0x24
vprintk_default from _printk+0x28/0x58
_printk from print_lockdep_cache+0x3c/0x68
print_lockdep_cache from print_unlock_imbalance_bug+0x6c/0xe0
print_unlock_imbalance_bug from lock_release+0x168/0x328
lock_release from up_write+0x20/0x244
up_write from copy_process+0x1120/0x193c
copy_process from kernel_clone+0xa0/0x2e4
kernel_clone from sys_clone+0x6c/0x94
sys_clone from ret_fast_syscall+0x0/0x1c
Exception stack(0xf0829fa8 to 0xf0829ff0)
9fa0: b64f47b8 b64f4c10 01200011 00000000 00000000 00000000
9fc0: b64f47b8 b64f4c10 00000000 00000078 00000020 00000000 b64f4750 00000001
9fe0: 00000078 be953908 b6ea5253 b6e47746
Code: e28dd00c e49de004 e28dd008 e12fff1e (e7d23001)
---[ end trace 0000000000000000 ]---
---
arch/arm/boot/dts/r8a7779-marzen.dts | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/arm/boot/dts/r8a7779-marzen.dts b/arch/arm/boot/dts/r8a7779-marzen.dts
index fd40890bd77bc64c..632519edba6b5a47 100644
--- a/arch/arm/boot/dts/r8a7779-marzen.dts
+++ b/arch/arm/boot/dts/r8a7779-marzen.dts
@@ -26,6 +26,33 @@ chosen {
stdout-path = "serial0:115200n8";
};
+ flash at 0 {
+ compatible = "mtd-rom";
+ reg = <0x0 0x04000000>;
+ bank-width = <2>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "uboot";
+ reg = <0x00000000 0x00040000>;
+ read-only;
+ };
+ partition at 40000 {
+ label = "uboot-env";
+ reg = <0x00040000 0x00040000>;
+ read-only;
+ };
+ partition at 80000 {
+ label = "flash";
+ reg = <0x00080000 0x03f80000>;
+ };
+ };
+ };
+
memory at 60000000 {
device_type = "memory";
reg = <0x60000000 0x40000000>;
--
2.34.1
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