Tegra's memory controller has a "memory hot reset" functionality that
blocks all memory transactions for the memory client, which is required
for a proper HW resetting. HW could perform DMA while being reset and this
could lead to a system hang or memory corruption, so here comes the memory
hot reset that blocks all interactions of HW with memory so that it could
be reset safely. Memory hot reset is urgently required for multimedia (on
Tegra20 especially), like GPU or video decoder, as it is quite easy to get
in a trouble without a proper HW reset.
Changelog:
V3:
Addressed review comments to V2 from Thierry Reding. MC now
uses generic reset controller API instead of a custom one,
hence DT changes are now involved and so Rob Herring is CC'd
for a review.
Added couple minor cleanup/correction patches.
V2:
Basically a re-send of V1 with some minor changes.
Dmitry Osipenko (14):
dt-bindings: arm: tegra: Remove duplicated Tegra30+ MC binding
dt-bindings: memory: tegra: Document #reset-cells property of the
Tegra30 MC
dt-bindings: arm: tegra: Document #reset-cells property of the Tegra20
MC
dt-bindings: memory: tegra: Add hot resets definitions
memory: tegra: Do not handle spurious interrupts
memory: tegra: Setup interrupts mask before requesting IRQ
memory: tegra: Apply interrupts mask per SoC
memory: tegra: Remove unused headers inclusions
memory: tegra: Squash tegra20-mc into common tegra-mc driver
memory: tegra: Introduce memory client hot reset
memory: tegra: Add Tegra124 memory controller hot resets
memory: tegra: Add Tegra114 memory controller hot resets
memory: tegra: Add Tegra30 memory controller hot resets
memory: tegra: Add Tegra20 memory controller hot resets
Thierry Reding (1):
memory: tegra: Add Tegra210 memory controller hot resets
.../bindings/arm/tegra/nvidia,tegra20-mc.txt | 12 +-
.../bindings/arm/tegra/nvidia,tegra30-mc.txt | 18 --
.../memory-controllers/nvidia,tegra30-mc.txt | 5 +
drivers/memory/Kconfig | 10 -
drivers/memory/Makefile | 1 -
drivers/memory/tegra/Makefile | 1 +
drivers/memory/tegra/mc.c | 358 +++++++++++++++++++--
drivers/memory/tegra/mc.h | 22 ++
drivers/memory/tegra/tegra114.c | 35 ++
drivers/memory/tegra/tegra124.c | 48 +++
drivers/memory/tegra/tegra20.c | 296 +++++++++++++++++
drivers/memory/tegra/tegra210.c | 53 ++-
drivers/memory/tegra/tegra30.c | 35 ++
drivers/memory/tegra20-mc.c | 254 ---------------
include/dt-bindings/memory/tegra114-mc.h | 19 ++
include/dt-bindings/memory/tegra124-mc.h | 25 ++
include/dt-bindings/memory/tegra20-mc.h | 21 ++
include/dt-bindings/memory/tegra210-mc.h | 31 ++
include/dt-bindings/memory/tegra30-mc.h | 19 ++
include/soc/tegra/mc.h | 37 ++-
20 files changed, 978 insertions(+), 322 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-mc.txt
create mode 100644 drivers/memory/tegra/tegra20.c
delete mode 100644 drivers/memory/tegra20-mc.c
create mode 100644 include/dt-bindings/memory/tegra20-mc.h
--
2.16.1
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