kernel/linux.git/drivers/memory/tegra/tegra234.c, branch v7.2-rc5

memory: tegra234: drop dead NULL check in tegra234_mc_icc_aggregate()

2026-06-09T15:00:30+00:00

In tegra234_mc_icc_aggregate(), the 'if (mc)' check inside the CPU-cluster branch is always true. 'mc' was already dereferenced via 'mc->bwmgr_mrq_supported' a few lines above, so if it were NULL the function would have faulted there. Drop the redundant check. Reported-by: Jon Hunter Signed-off-by: Sumit Gupta Reviewed-by: Jon Hunter Tested-by: Jon Hunter Link: https://patch.msgid.link/20260527140127.49172-4-sumitg@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Add Tegra238 MC support

2026-05-04T17:27:15+00:00

Add Memory Controller driver support for Tegra238 SOC, including: - MC client definitions with Tegra238-specific stream IDs - Reuse of Tegra234 ICC operations for bandwidth management via BPMP-FW - Device tree compatible string "nvidia,tegra238-mc" Export tegra234_mc_icc_ops so it can be shared with the Tegra238 MC driver, as both SoCs use the same ICC aggregation and bandwidth management logic. Signed-off-by: Ashish Mhetre Reviewed-by: Jon Hunter Link: https://patch.msgid.link/20260427073419.567360-3-amhetre@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Prepare for supporting multiple intmask registers

2026-03-07T17:02:41+00:00

Add a new structure for the intmask register e.g. MC_INTMASK_0 and it's mask value. Add an array of these new structures to prepare for supporting multiple intmask registers. This is done in preparation for adding support for Tegra264 which supports multiple intmask registers. Signed-off-by: Ketan Patil Reviewed-by: Jon Hunter Tested-by: Jon Hunter Link: https://patch.msgid.link/20260226163115.1152181-6-ketanp@nvidia.com [krzk: Fix checkpatch warning] Signed-off-by: Krzysztof Kozlowski

memory: tegra: Group SoC specific fields

2026-03-07T17:02:29+00:00

Introduce new SoC specific fields in tegra_mc_soc struct for high address mask and error status type mask because Tegra264 has different values for these than the existing devices. Error status registers e.g. MC_ERR_STATUS_0 has few bits which indicate the type of the error. In order to obtain such type of error from error status register, we use error status type mask. Similarly, these error status registers have bits which indicate the higher address bits of the address responsible for mc error. In order to obtain such higher address, we use high address mask. Make this change to prepare for adding MC interrupt support for Tegra264. Signed-off-by: Ketan Patil Reviewed-by: Jon Hunter Tested-by: Jon Hunter Link: https://patch.msgid.link/20260226163115.1152181-5-ketanp@nvidia.com [krzk: Fix checkpatch warning] Signed-off-by: Krzysztof Kozlowski

memory: tegra: Add support for multiple IRQs

2026-03-07T16:59:37+00:00

Add support to handle multiple MC interrupts lines, as supported by Tegra264. Turn the single IRQ handler callback into a counted array to allow specifying a separate handler for each interrupt. Move IRQ handlers into tegra_mc_soc struct, so as to specify SoC specific values. Signed-off-by: Ketan Patil Reviewed-by: Jon Hunter Tested-by: Jon Hunter Link: https://patch.msgid.link/20260226163115.1152181-4-ketanp@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Group error handling related registers

2026-03-07T16:59:35+00:00

Group MC error related registers into a struct as they could have SoC specific values. Tegra264 has different register offsets than the existing devices and so in order to add support for Tegra264 we need to first make this change. Signed-off-by: Ketan Patil Reviewed-by: Jon Hunter Tested-by: Jon Hunter Link: https://patch.msgid.link/20260226163115.1152181-2-ketanp@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Fix indentation

2024-02-22T08:48:53+00:00

Fix the indentation of the '.regs' member for the Tegra234 NVJPG memory client. Signed-off-by: Jon Hunter Link: https://lore.kernel.org/r/20240220124430.19072-3-jonathanh@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Add BPMP and ICC info for DLA clients

2024-02-22T08:48:53+00:00

Add the BPMP IDs and ICC type information for the Tegra234 DLA memory clients. Signed-off-by: Jon Hunter Link: https://lore.kernel.org/r/20240220124430.19072-2-jonathanh@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Correct DLA client names

2024-02-22T08:48:52+00:00

Some of the names for the Tegra234 DLA clients are not unique and do not align with the name of the client ID definitions. Therefore, it is not possible to determine the exact DLA client from messages that print the client name. Fix this by correcting the DLA memory client names for Tegra234 to align with the name of the corresponding memory client ID. Note that although the client names are also used by the interconnect framework, interconnect support for the DLA clients has not been added and so this issue does not impact the interconnect support. Fixes: 5cd24ca0985f ("memory: tegra: Add DLA clients for Tegra234") Signed-off-by: Jon Hunter Link: https://lore.kernel.org/r/20240220124430.19072-1-jonathanh@nvidia.com Signed-off-by: Krzysztof Kozlowski

Merge tag 'memory-controller-drv-6.7' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl into soc/drivers

2023-10-16T21:00:46+00:00

Memory controller drivers for v6.7 1. Atmel: Use __counted_by annotation. 2. Tegra: Add Tegra234 clients for RCE and VI. 3. Cleanup: - Use device_get_match_data() to simplify the code, - Make "additionalProperties: true" explicit in Devicetree bindings. * tag 'memory-controller-drv-6.7' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl: memory: Use device_get_match_data() memory: tegra: Add Tegra234 clients for RCE and VI dt-bindings: memory-controllers: Make "additionalProperties: true" explicit memory: atmel-ebi: Annotate struct atmel_ebi_dev with __counted_by Link: https://lore.kernel.org/r/20231016074013.28286-1-krzysztof.kozlowski@linaro.org Signed-off-by: Arnd Bergmann