1. As reset is required for MMC DT, this patch series aims to add the currently missing required driver ops.

Whithout this patch the following kernel null error appears:

[    0.459197] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[    0.459978] Mem abort info:
[    0.460324]   ESR = 0x0000000096000004
[    0.460791]   EC = 0x25: DABT (current EL), IL = 32 bits
[    0.461471]   SET = 0, FnV = 0
[    0.461830]   EA = 0, S1PTW = 0
[    0.462220]   FSC = 0x04: level 0 translation fault
[    0.462722] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[    0.462826] Data abort info:
[    0.462829]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[    0.462842] Mem abort info:
[    0.462849]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[    0.462859]   ESR = 0x0000000096000004
[    0.462865]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[    0.462874]   EC = 0x25: DABT (current EL), IL = 32 bits
[    0.462882] [0000000000000000] user address but active_mm is swapper
[    0.462890]   SET = 0, FnV = 0
[    0.462901] Internal error: Oops: 0000000096000004 [#1]  SMP
[    0.462909]   EA = 0, S1PTW = 0
[    0.462917] Modules linked in:
[    0.462925]   FSC = 0x04: level 0 translation fault
[    0.462932] 
[    0.462939] Data abort info:
[    0.462951] CPU: 4 UID: 0 PID: 90 Comm: kworker/u34:3 Not tainted 7.0.0-rc4-next-20260319 #41 PREEMPT 
[    0.463920]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[    0.463927] Hardware name: Khadas VIM4 (DT)
[    0.463940]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[    0.463951] Workqueue: async async_run_entry_fn
[    0.464277]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[    0.464286] 
[    0.464294] [0000000000000000] user address but active_mm is swapper
[    0.464304] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[    0.465935] pc : reset_control_reset+0x48/0x1d0
[    0.466409] lr : reset_control_reset+0x38/0x1d0
[    0.479907] sp : ffff800083943b60
[    0.479911] x29: ffff800083943b60 x28: 0000000000000000 x27: 0000000000000000
[    0.479926] x26: ffff80008310a9c0 x25: 0000000000000000 x24: ffff000100372005
[    0.481212] x23: ffff0001003a4000 x22: ffff000100fee988 x21: 0000000000000000
[    0.482976] x20: ffff00023f00a788 x19: ffff000100fee980 x18: 0000000000000006
[    0.483865] x17: 64656c62616e655f x16: 7469647561206465 x15: ffff800083943530
[    0.484753] x14: 0000000000000000 x13: 000000000000022d x12: 0000000000002000
[    0.485642] x11: ffff00023efdc754 x10: ffff00023efdc740 x9 : 0000000000000000
[    0.486530] x8 : ffff00023efd8a40 x7 : fffffffffffffe70 x6 : ffff00023efd89e0
[    0.487418] x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000001
[    0.488307] x2 : ffff000102002488 x1 : ffff8000822248c0 x0 : 0000000000000000
[    0.489196] Call trace:
[    0.489500]  reset_control_reset+0x48/0x1d0 (P)
[    0.490062]  __device_reset+0xc8/0xfc
[    0.490517]  meson_mmc_probe+0xe8/0x3d4
[    0.490994]  platform_probe+0x5c/0x98
[    0.491448]  really_probe+0xbc/0x298
[    0.491892]  __driver_probe_device+0x78/0x12c
[    0.492434]  driver_probe_device+0xd4/0x164
[    0.492954]  __device_attach_driver+0xb8/0x140
[    0.493507]  bus_for_each_drv+0x84/0xe0
[    0.493983]  __device_attach_async_helper+0xac/0xd0
[    0.494590]  async_run_entry_fn+0x34/0xe0
[    0.495089]  process_one_work+0x158/0x29c
[    0.495587]  worker_thread+0x18c/0x308
[    0.496053]  kthread+0x11c/0x128
[    0.496453]  ret_from_fork+0x10/0x20
[    0.496904] Code: f9400262 2a0003f5 b4000902 f9400040 (f9400003) 
[    0.497661] ---[ end trace 0000000000000000 ]---
[    0.498234] Internal error: Oops: 0000000096000004 [#2]  SMP
[    0.498935] Modules linked in:
[    0.499319] CPU: 1 UID: 0 PID: 88 Comm: kworker/u34:1 Tainted: G      D             7.0.0-rc4-next-20260319 #41 PREEMPT 
[    0.500669] Tainted: [D]=DIE
[    0.501025] Hardware name: Khadas VIM4 (DT)
[    0.501547] Workqueue: async async_run_entry_fn
[    0.502109] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[    0.502975] pc : reset_control_reset+0x48/0x1d0
[    0.503538] lr : reset_control_reset+0x38/0x1d0
[    0.504102] sp : ffff800083903b60
[    0.504513] x29: ffff800083903b60 x28: 0000000000000000 x27: 0000000000000000
[    0.505402] x26: ffff000100059028 x25: 0000000000000000 x24: ffff000100372005
[    0.506290] x23: ffff000100ec9400 x22: ffff0001003f6e08 x21: 0000000000000000
[    0.507178] x20: ffff00023f00b440 x19: ffff0001003f6e00 x18: 00000000ffffffff
[    0.508067] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000839037e0
[    0.508955] x14: 0000000000000000 x13: 0000000000000290 x12: 0000000000002000
[    0.509843] x11: ffff00023efdc754 x10: ffff00023efdc740 x9 : 0000000000000000
[    0.510732] x8 : ffff00023efd8bc0 x7 : fffffffffffffe70 x6 : ffff00023efd8b60
[    0.511620] x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000001
[    0.512508] x2 : ffff000102002488 x1 : ffff800082224a40 x0 : 0000000000000000
[    0.513397] Call trace:
[    0.513700]  reset_control_reset+0x48/0x1d0 (P)
[    0.514263]  __device_reset+0xc8/0xfc
[    0.514718]  meson_mmc_probe+0xe8/0x3d4
[    0.515195]  platform_probe+0x5c/0x98
[    0.515650]  really_probe+0xbc/0x298
[    0.516094]  __driver_probe_device+0x78/0x12c
[    0.516636]  driver_probe_device+0xd4/0x164
[    0.517156]  __device_attach_driver+0xb8/0x140
[    0.517709]  bus_for_each_drv+0x84/0xe0
[    0.518185]  __device_attach_async_helper+0xac/0xd0
[    0.518792]  async_run_entry_fn+0x34/0xe0
[    0.519290]  process_one_work+0x158/0x29c
[    0.519788]  worker_thread+0x18c/0x308
[    0.520254]  kthread+0x11c/0x128
[    0.520655]  ret_from_fork+0x10/0x20
[    0.521103] Code: f9400262 2a0003f5 b4000902 f9400040 (f9400003) 
[    0.521860] ---[ end trace 0000000000000000 ]---

2. The following patch yet to merge reports a missing required property with CHECK_DTBS=y

https://lore.kernel.org/r/20260326-add-emmc-t7-vim4-v5-3-d3f182b48e9d@aliel.fr/

/home/rony/project/khadas/fenix/build/linux/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dtb: mmc@88000 (amlogic,t7-mmc): 'resets' is a required property
	from schema $id: http://devicetree.org/schemas/mmc/amlogic,meson-gx-mmc.yaml
/home/rony/project/khadas/fenix/build/linux/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dtb: mmc@8a000 (amlogic,t7-mmc): 'resets' is a required property
	from schema $id: http://devicetree.org/schemas/mmc/amlogic,meson-gx-mmc.yaml
/home/rony/project/khadas/fenix/build/linux/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dtb: mmc@8c000 (amlogic,t7-mmc): 'resets' is a required property
	from schema $id: http://devicetree.org/schemas/mmc/amlogic,meson-gx-mmc.yaml

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
Ronald Claveau (2):
      reset: amlogic: t7: Fix null reset ops
      arm64: dts: amlogic: t7: Fix missing required reset property

 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 3 +++
 drivers/reset/amlogic/reset-meson.c         | 1 +
 2 files changed, 4 insertions(+)
---
base-commit: f6eb9ae8b9fc13c3971e4a6d1e8442f253001f36
change-id: 20260331-fix-aml-t7-null-reset-2b608ebf9da4
prerequisite-change-id: 20260320-add-emmc-t7-vim4-6ad16e94614f:v5
prerequisite-patch-id: 5b5de77af11747ce964404fb827d2ee2bff47ea5
prerequisite-patch-id: 1e37fc75fed1e533adee0f3e7e6ead1f8ff3c55c
prerequisite-patch-id: 65a5d76ffdbc9b3aab3385bb65cb027004c30e7e
prerequisite-patch-id: 2daf583fb5e7449a02bd217d8aca330171b598aa
prerequisite-patch-id: 237269801826dd3ad7fb16eb4d7d6d4eab504278
prerequisite-patch-id: d1ddf9b7710e91f8062de83bd7ba55afb2c4c112
prerequisite-patch-id: 57e9b08a968aedf543d3d0d56cf1ca4db20b2a16
prerequisite-patch-id: cd98b74fa56af72af2553f391c400981d83cd4f4
prerequisite-patch-id: b730f5e42be1d89d193e63a0265495cdbf2c7d7b

Best regards,
-- 
Ronald Claveau <linux-kernel-dev@aliel.fr>