linux-stable.git/drivers/memory/tegra, branch v6.18.40 Linux kernel stable tree memory: tegra: Wire up system sleep PM ops 2026-07-24T14:15:45+00:00 Ashish Mhetre amhetre@nvidia.com 2026-04-30T09:52:01+00:00 928f758f8f2143eabd0c7aadab67182641045ed6 [ Upstream commit 2411c8d1e3e09910e94bab0d0a2c071fbc8a9e7b ] The tegra-mc platform driver does not register any dev_pm_ops, so the SoC-specific ->resume() is never invoked (e.g. tegra186_mc_resume) on system wake. On Tegra186 and later this means MC client Stream-ID override registers are not reprogrammed, and clients behind the ARM SMMU fault on the first DMA after resume. Register a dev_pm_ops on the tegra-mc driver and route the system resume callback into mc->soc->ops->resume() so the existing SID restore path runs again on wake. No suspend callback is needed as the resume path reprograms all MC state from the static SoC tables, so there is nothing to save. Fixes: fe3b082a6eb8 ("memory: tegra: Add SID override programming for MC clients") Signed-off-by: Ashish Mhetre <amhetre@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Link: https://patch.msgid.link/20260430095202.1167651-3-amhetre@nvidia.com Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 2411c8d1e3e09910e94bab0d0a2c071fbc8a9e7b ]

The tegra-mc platform driver does not register any dev_pm_ops, so the
SoC-specific ->resume() is never invoked (e.g. tegra186_mc_resume) on
system wake. On Tegra186 and later this means MC client Stream-ID
override registers are not reprogrammed, and clients behind the ARM
SMMU fault on the first DMA after resume.

Register a dev_pm_ops on the tegra-mc driver and route the system
resume callback into mc->soc->ops->resume() so the existing SID
restore path runs again on wake.

No suspend callback is needed as the resume path reprograms all MC
state from the static SoC tables, so there is nothing to save.

Fixes: fe3b082a6eb8 ("memory: tegra: Add SID override programming for MC clients")
Signed-off-by: Ashish Mhetre <amhetre@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://patch.msgid.link/20260430095202.1167651-3-amhetre@nvidia.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
memory: tegra30-emc: Fix dll_change check 2026-05-23T11:06:44+00:00 Mikko Perttunen mperttunen@nvidia.com 2026-01-26T06:50:43+00:00 86b77735cb4c47df862bc9ac6bb8b3fd6e69b118 [ Upstream commit 0a93f2355cf4922ad2399dbef5ea1049fef116d4 ] The code checking whether the specified memory timing enables DLL in the EMRS register was reversed. DLL is enabled if bit A0 is low. Fix the check. Fixes: e34212c75a68 ("memory: tegra: Introduce Tegra30 EMC driver") Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Link: https://patch.msgid.link/20260126-fix-emc-dllchange-v1-2-47ad3bb63262@nvidia.com Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 0a93f2355cf4922ad2399dbef5ea1049fef116d4 ]

The code checking whether the specified memory timing enables DLL
in the EMRS register was reversed. DLL is enabled if bit A0 is low.
Fix the check.

Fixes: e34212c75a68 ("memory: tegra: Introduce Tegra30 EMC driver")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Link: https://patch.msgid.link/20260126-fix-emc-dllchange-v1-2-47ad3bb63262@nvidia.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
memory: tegra124-emc: Fix dll_change check 2026-05-23T11:06:44+00:00 Mikko Perttunen mperttunen@nvidia.com 2026-01-26T06:50:42+00:00 1793249c067a4b28e1aba0ad0e4d73aa9f9e165a [ Upstream commit 9597ab9a8296ab337e6820f8a717ff621078b632 ] The code checking whether the specified memory timing enables DLL in the EMRS register was reversed. DLL is enabled if bit A0 is low. Fix the check. Fixes: 73a7f0a90641 ("memory: tegra: Add EMC (external memory controller) driver") Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Link: https://patch.msgid.link/20260126-fix-emc-dllchange-v1-1-47ad3bb63262@nvidia.com Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 9597ab9a8296ab337e6820f8a717ff621078b632 ]

The code checking whether the specified memory timing enables DLL
in the EMRS register was reversed. DLL is enabled if bit A0 is low.
Fix the check.

Fixes: 73a7f0a90641 ("memory: tegra: Add EMC (external memory controller) driver")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Link: https://patch.msgid.link/20260126-fix-emc-dllchange-v1-1-47ad3bb63262@nvidia.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
memory: tegra210: Fix incorrect client ids 2025-10-23T13:32:21+00:00 Aaron Kling webgeek1234@gmail.com 2025-10-21T19:47:06+00:00 6f37469a933030692741710db809722076f71973 The original commit had typos for two of the memory client ids. Fix them to reference the correct bindings. Fixes: 3804cef4c597 ("memory: tegra210: Use bindings for client ids") Signed-off-by: Aaron Kling <webgeek1234@gmail.com> Link: https://patch.msgid.link/20251021-t210-mem-clientid-fixup-v1-1-5094946faa31@gmail.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> 
The original commit had typos for two of the memory client ids. Fix them
to reference the correct bindings.

Fixes: 3804cef4c597 ("memory: tegra210: Use bindings for client ids")
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
Link: https://patch.msgid.link/20251021-t210-mem-clientid-fixup-v1-1-5094946faa31@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
memory: tegra210: Use bindings for client ids 2025-09-10T09:40:44+00:00 Aaron Kling webgeek1234@gmail.com 2025-09-06T20:16:54+00:00 3804cef4c59742cf695e7b41a9aabe8d5bb25ca2 Since the related binding is being added, use that for the client ids instead of hardcoded magic numbers. Signed-off-by: Aaron Kling <webgeek1234@gmail.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> 
Since the related binding is being added, use that for the client ids
instead of hardcoded magic numbers.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
memory: tegra: Add Tegra264 MC and EMC support 2025-07-11T14:49:42+00:00 Sumit Gupta sumitg@nvidia.com 2025-07-09T22:21:47+00:00 2401dc4dcdd02920faa9a8c4384f1503a15e779a Add support to enable Memory Controller (MC) and External Memory Controller (EMC) drivers for Tegra264. The nodes for MC and EMC are mostly the same as Tegra234 but differ in number of channels and interrupt numbers. The patch also adds the bandwidth manager definitions required for Tegra264 and uses them to populate the memory client table. All of these are needed to properly enable memory interconnect (ICC) support. Signed-off-by: Sumit Gupta <sumitg@nvidia.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20250709222147.3758356-3-thierry.reding@gmail.com Signed-off-by: Thierry Reding <treding@nvidia.com> 
Add support to enable Memory Controller (MC) and External Memory
Controller (EMC) drivers for Tegra264. The nodes for MC and EMC are
mostly the same as Tegra234 but differ in number of channels and
interrupt numbers.

The patch also adds the bandwidth manager definitions required for
Tegra264 and uses them to populate the memory client table. All of
these are needed to properly enable memory interconnect (ICC) support.

Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250709222147.3758356-3-thierry.reding@gmail.com
Signed-off-by: Thierry Reding <treding@nvidia.com>
treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08T07:07:37+00:00 Ingo Molnar mingo@kernel.org 2025-05-09T05:51:14+00:00 41cb08555c4164996d67c78b3bf1c658075b75f1 Move this API to the canonical timer_*() namespace. [ tglx: Redone against pre rc1 ] Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com 
Move this API to the canonical timer_*() namespace.

[ tglx: Redone against pre rc1 ]

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com
memory: tegra: Do not enable by default during compile testing 2025-04-15T05:43:54+00:00 Krzysztof Kozlowski krzysztof.kozlowski@linaro.org 2025-04-04T11:17:03+00:00 9a4199ae8a041bf75b544c1f46a2ea95417b69de Enabling the compile test should not cause automatic enabling of all drivers. Link: https://lore.kernel.org/r/20250404111703.235455-2-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> 
Enabling the compile test should not cause automatic enabling of all
drivers.

Link: https://lore.kernel.org/r/20250404111703.235455-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
treewide: Switch/rename to timer_delete[_sync]() 2025-04-05T08:30:12+00:00 Thomas Gleixner tglx@linutronix.de 2025-04-05T08:17:26+00:00 8fa7292fee5c5240402371ea89ab285ec856c916 timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree over and remove the historical wrapper inlines. Conversion was done with coccinelle plus manual fixups where necessary. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> 
timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree
over and remove the historical wrapper inlines.

Conversion was done with coccinelle plus manual fixups where necessary.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
memory: tegra20-emc: Drop redundant platform_get_irq() error printk 2025-02-03T11:52:07+00:00 Krzysztof Kozlowski krzysztof.kozlowski@linaro.org 2025-01-04T14:14:30+00:00 2f76a890fd2c636c640af1387b333aeb0cf69c75 platform_get_irq() already prints error message, so duplicating it is redundant. The message about "need of updating DT" makes no sense, because this code was there since beginning. Link: https://lore.kernel.org/r/20250104141430.115031-1-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> 
platform_get_irq() already prints error message, so duplicating it is
redundant.  The message about "need of updating DT" makes no sense,
because this code was there since beginning.

Link: https://lore.kernel.org/r/20250104141430.115031-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>