Fixes a regression for wake events on Tegra194 caused by the Tegra210
support that was added in v5.5-rc1 as well as wrong reset sources and
levels on Tegra194.
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Merge tag 'tegra-for-5.5-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/fixes
soc/tegra: Fixes for v5.5-rc1
Fixes a regression for wake events on Tegra194 caused by the Tegra210
support that was added in v5.5-rc1 as well as wrong reset sources and
levels on Tegra194.
* tag 'tegra-for-5.5-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
soc/tegra: pmc: Add reset sources and levels on Tegra194
soc/tegra: pmc: Add missing IRQ callbacks on Tegra194
soc/tegra: pmc: Use lower-case for hexadecimal literals
Link: https://lore.kernel.org/r/20191204130753.3614278-2-thierry.reding@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
Various driver updates for platforms:
- A larger set of work on Tegra 2/3 around memory controller and
regulator features, some fuse cleanups, etc..
- MMP platform drivers, in particular for USB PHY, and other smaller
additions.
- Samsung Exynos 5422 driver for DMC (dynamic memory configuration),
and ASV (adaptive voltage), allowing the platform to run at more
optimal operating points.
- Misc refactorings and support for RZ/G2N and R8A774B1 from Renesas
- Clock/reset control driver for TI/OMAP
- Meson-A1 reset controller support
- Qualcomm sdm845 and sda845 SoC IDs for socinfo
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Olof Johansson:
"Various driver updates for platforms:
- A larger set of work on Tegra 2/3 around memory controller and
regulator features, some fuse cleanups, etc..
- MMP platform drivers, in particular for USB PHY, and other smaller
additions.
- Samsung Exynos 5422 driver for DMC (dynamic memory configuration),
and ASV (adaptive voltage), allowing the platform to run at more
optimal operating points.
- Misc refactorings and support for RZ/G2N and R8A774B1 from Renesas
- Clock/reset control driver for TI/OMAP
- Meson-A1 reset controller support
- Qualcomm sdm845 and sda845 SoC IDs for socinfo"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (150 commits)
firmware: arm_scmi: Fix doorbell ring logic for !CONFIG_64BIT
soc: fsl: add RCPM driver
dt-bindings: fsl: rcpm: Add 'little-endian' and update Chassis definition
memory: tegra: Consolidate registers definition into common header
memory: tegra: Ensure timing control debug features are disabled
memory: tegra: Introduce Tegra30 EMC driver
memory: tegra: Do not handle error from wait_for_completion_timeout()
memory: tegra: Increase handshake timeout on Tegra20
memory: tegra: Print a brief info message about EMC timings
memory: tegra: Pre-configure debug register on Tegra20
memory: tegra: Include io.h instead of iopoll.h
memory: tegra: Adapt for Tegra20 clock driver changes
memory: tegra: Don't set EMC rate to maximum on probe for Tegra20
memory: tegra: Add gr2d and gr3d to DRM IOMMU group
memory: tegra: Set DMA mask based on supported address bits
soc: at91: Add Atmel SFR SN (Serial Number) support
memory: atmel-ebi: switch to SPDX license identifiers
memory: atmel-ebi: move NUM_CS definition inside EBI driver
soc: mediatek: Refactor bus protection control
soc: mediatek: Refactor sram control
...
Tegra194 supports the same reset levels as Tegra186 but extends the set
of reset sources. Provide custom PMC register definitions to account for
the larger field for the reset sources as well as the updated list of
reset sources.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
Changes in v2:
- use the new Tegra194 register definitions
Reuse the IRQ callbacks from Tegra186 on Tegra194. This fixes failures
to request interrupts on Tegra194 due to the missing callbacks.
Cc: Sowjanya Komatineni <skomatineni@nvidia.com>
Fixes: aba19827fc ("soc/tegra: pmc: Support wake events on more Tegra SoCs")
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The remainder of the file uses lower-case for hexadecimal literals, so
change the only odd-one-out occurrence for consistency.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The removed barrier isn't needed because writes/reads are strictly ordered
and even if PMC had separate ports for writes, it wouldn't matter since
the hardware logic takes into effect after triggering CPU's power-gating
and at that point all CPU accesses are guaranteed to be completed. That
barrier was copied from the old arch/ code during transition to the soc/
PMC driver and even that the code structure was different back then, the
barrier didn't have a real useful purpose from the start. Lastly, the
tegra_pmc_writel() naturally inserts wmb() because it uses writel(),
and thus this change doesn't actually make any difference in terms of
interacting with hardware. Hence let's remove the barrier to clean up
code a tad.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
It is possible to get a lockup if kernel decides to enter LP2 cpuidle
from some clk-notifier, in that case CCF's "prepare" mutex is kept locked
and thus clk_get_rate(pclk) blocks on the same mutex with interrupts being
disabled, hanging machine.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Turned out that WFI doesn't work reliably on Tegra30 as a trigger for
the power-gating, it causes CPU hang under some circumstances like having
memory controller running of PLLP. The TRM doc states that WFI should be
used for the Big-Little "Cluster Switch", while WFE for the power-gating.
Hence let's use the WFE for CPU0 power-gating, like it is done for the
power-gating of a secondary cores. This fixes CPU hang after entering LP2
with memory running off PLLP.
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add regulators coupler for Tegra30 SoCs that performs voltage balancing
of a coupled regulators and thus provides voltage scaling functionality.
There are 2 coupled regulators on all Tegra30 SoCs: CORE and CPU. The
coupled regulator voltages shall be in a range of 300mV from each other
and CORE voltage shall be higher than the CPU by N mV, where N depends
on the CPU voltage.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add regulators coupler for Tegra20 SoCs that performs voltage balancing
of a coupled regulators and thus provides voltage scaling functionality.
There are 3 coupled regulators on all Tegra20 SoCs: CORE, RTC and CPU.
The CORE and RTC voltages shall be in range of 170mV from each other and
they both shall be higher than the CPU voltage by at least 120mV. This
sounds like it could be handle by a generic voltage balancer, but the CORE
voltage scaling isn't implemented in any of the upstream drivers yet.
It will take quite some time and effort to hook up voltage scaling for
all of the drivers, hence we will use a custom coupler that will manage
the CPU voltage scaling for the starter.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tegra210 and prior Tegra chips have deep sleep entry and wakeup related
timings which are platform specific that should be configured before
entering into deep sleep.
Below are the timing specific configurations for deep sleep entry and
wakeup.
- Core rail power-on stabilization timer
- OSC clock stabilization timer after SOC rail power is stabilized.
- Core power off time is the minimum wake delay to keep the system
in deep sleep state irrespective of any quick wake event.
These values depends on the discharge time of regulators and turn OFF
time of the PMIC to allow the complete system to finish entering into
deep sleep state.
These values vary based on the platform design and are specified
through the device tree.
This patch has implementation to configure these timings which are must
to have for proper deep sleep and wakeup operations.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This patch configures polarity of the core power request signal
in PMC control register based on the device tree property.
PMC asserts and de-asserts power request signal based on it polarity
when it need to power-up and power-down the core rail during SC7.
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This patch implements PMC wakeup sequence for Tegra210 and defines the
commonly used RTC alarm wake event.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This patch allows to create separate irq_set_wake and irq_set_type
implementations for different Tegra designs PMC that has different
wake models which require difference wake registers and different
programming sequence.
AOWAKE model support is available for Tegra186 and Tegra194 only
and it resides within PMC and supports tiered wake architecture.
Tegra210 and prior Tegra designs uses PMC directly to receive wake
events and coordinate the wake sequence.
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Typically nvmem cells would be stored in device tree. However, for
compatibility with device trees that don't contain nvmem cell
definitions, register lookups for cells currently used by consumers.
This allows the consumers to use the same API to query cells from the
device tree or using the legacy mechanism.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The nvmem framework provides a generic infrastructure and API to access
the type of information stored in fuses such as the Tegra FUSE block.
Implement an nvmem device that can be used to access the information in
a more generic way to decouple consumers from the custom Tegra API and
to add a more formal way of creating the dependency between the FUSE
device and the consumers.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Interrupts that don't have an associated wake event or GPIO wake events
end up with an associate IRQ chip that is NULL and which causes IRQ code
to crash. This is because we don't implicitly set the parent IRQ chip by
allocating the interrupt at the parent. However, there really isn't a
corresponding interrupt at the parent, so we need to work around this by
setting the special no_irq_chip as the IRQ chip for these interrupts.
Fixes: 19906e6b16 ("soc/tegra: pmc: Add wake event support")
Signed-off-by: Thierry Reding <treding@nvidia.com>
tegra_fuse_readl() can be called from drivers at any time. If this API
is called before tegra_fuse_probe(), we end up enabling the clock before
it is registered. Add a check for the FUSE clock in tegra_fuse_readl()
and propagate any errors.
Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Various driver updates for platforms and a couple of the small driver
subsystems we merge through our tree:
- A driver for SCU (system control) on NXP i.MX8QXP
- Qualcomm Always-on Subsystem messaging driver (AOSS QMP)
- Qualcomm PM support for MSM8998
- Support for a newer version of DRAM PHY driver for Broadcom (DPFE)
- Reset controller support for Bitmain BM1880
- TI SCI (System Control Interface) support for CPU control on AM654
processors
- More TI sysc refactoring and rework
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC-related driver updates from Olof Johansson:
"Various driver updates for platforms and a couple of the small driver
subsystems we merge through our tree:
- A driver for SCU (system control) on NXP i.MX8QXP
- Qualcomm Always-on Subsystem messaging driver (AOSS QMP)
- Qualcomm PM support for MSM8998
- Support for a newer version of DRAM PHY driver for Broadcom (DPFE)
- Reset controller support for Bitmain BM1880
- TI SCI (System Control Interface) support for CPU control on AM654
processors
- More TI sysc refactoring and rework"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (84 commits)
reset: remove redundant null check on pointer dev
soc: rockchip: work around clang warning
dt-bindings: reset: imx7: Fix the spelling of 'indices'
soc: imx: Add i.MX8MN SoC driver support
soc: aspeed: lpc-ctrl: Fix probe error handling
soc: qcom: geni: Add support for ACPI
firmware: ti_sci: Fix gcc unused-but-set-variable warning
firmware: ti_sci: Use the correct style for SPDX License Identifier
soc: imx8: Use existing of_root directly
soc: imx8: Fix potential kernel dump in error path
firmware/psci: psci_checker: Park kthreads before stopping them
memory: move jedec_ddr.h from include/memory to drivers/memory/
memory: move jedec_ddr_data.c from lib/ to drivers/memory/
MAINTAINERS: Remove myself as qcom maintainer
soc: aspeed: lpc-ctrl: make parameter optional
soc: qcom: apr: Don't use reg for domain id
soc: qcom: fix QCOM_AOSS_QMP dependency and build errors
memory: tegra: Fix -Wunused-const-variable
firmware: tegra: Early resume BPMP
soc/tegra: Select pinctrl for Tegra194
...
- Add support in dmaengine core to do device node checks for DT devices and
update bunch of drivers to use that and remove open coding from drivers
- New driver/driver support for new hardware, namely:
- MediaTek UART APDMA
- Freescale i.mx7ulp edma2
- Synopsys eDMA IP core version 0
- Allwinner H6 DMA
- Updates to axi-dma and support for interleaved cyclic transfers
- Greg's debugfs return value check removals on drivers
- Updates to stm32-dma, hsu, dw, pl330, tegra drivers
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Merge tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
- Add support in dmaengine core to do device node checks for DT devices
and update bunch of drivers to use that and remove open coding from
drivers
- New driver/driver support for new hardware, namely:
- MediaTek UART APDMA
- Freescale i.mx7ulp edma2
- Synopsys eDMA IP core version 0
- Allwinner H6 DMA
- Updates to axi-dma and support for interleaved cyclic transfers
- Greg's debugfs return value check removals on drivers
- Updates to stm32-dma, hsu, dw, pl330, tegra drivers
* tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (68 commits)
dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support"
dmaengine: at_xdmac: check for non-empty xfers_list before invoking callback
Documentation: dmaengine: clean up description of dmatest usage
dmaengine: tegra210-adma: remove PM_CLK dependency
dmaengine: fsl-edma: add i.mx7ulp edma2 version support
dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma
dmaengine: fsl-edma-common: version check for v2 instead
dmaengine: fsl-edma-common: move dmamux register to another single function
dmaengine: fsl-edma: add drvdata for fsl-edma
dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver"
dmaengine: rcar-dmac: Reject zero-length slave DMA requests
dmaengine: dw: Enable iDMA 32-bit on Intel Elkhart Lake
dmaengine: dw-edma: fix semicolon.cocci warnings
dmaengine: sh: usb-dmac: Use [] to denote a flexible array member
dmaengine: dmatest: timeout value of -1 should specify infinite wait
dmaengine: dw: Distinguish ->remove() between DW and iDMA 32-bit
dmaengine: fsl-edma: support little endian for edma driver
dmaengine: hsu: Revert "set HSU_CH_MTSR to memory width"
dmagengine: pl330: add code to get reset property
dt-bindings: pl330: document the optional resets property
...
This contains a set of minor fixes and cleanups for core Tegra drivers.
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Merge tag 'tegra-for-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers
soc: tegra: Changes for v5.3-rc1
This contains a set of minor fixes and cleanups for core Tegra drivers.
* tag 'tegra-for-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
soc/tegra: Select pinctrl for Tegra194
soc/tegra: fuse: Do not log error message on deferred probe
soc/tegra: pmc: Add comments clarifying wake events
soc/tegra: pmc: Avoid crash for non-wake IRQs
soc/tegra: pmc: Fail to allocate more than one wake IRQ
Signed-off-by: Olof Johansson <olof@lixom.net>
tegra_powergate_sequence_power_up() powers up partition and also enables
clock & reset. However, if a controller like PCIe have multiple clocks
& resets and they need to be enabled in a sequence, driver must use
standalone function tegra_powergate_power_on() to power up partition.
Export tegra_powergate_power_on() to allow Tegra controller drivers to
unpower gate partition independent to clock & reset.
Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Based on 2 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 4122 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not see http www gnu org
licenses
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 33 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531081038.745679586@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 263 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Based on 1 normalized pattern(s):
this software is licensed under the terms of the gnu general public
license version 2 as published by the free software foundation and
may be copied distributed and modified under those terms this
program is distributed in the hope that it will be useful but
without any warranty without even the implied warranty of
merchantability or fitness for a particular purpose see the gnu
general public license for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 285 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Recent changes have made it much more probable that clocks are not
available yet when the FUSE driver is first probed. However, that is a
situation that the driver can cope with just fine.
To avoid confusion, don't output an error when this happens.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add some comments to clarify the purpose of the wake event support
implemented in the PMC driver.
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
For interrupts that are not wakeup sources but that may end up getting
mapped through the PMC as interrupt parent (this can happen for GPIOs),
return early in order to avoid a subsequent crash from an out-of-bounds
access to the register region.
Reported-by: Bitan Biswas <bbiswas@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The code currently doesn't support allocating more than one wake IRQ at
a time. Detect this situation and error out. Also make sure to output a
warning when that happens to help track down callers.
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not see http www gnu org
licenses
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 228 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The __dma_request_channel() prototype has been changed to help to do
device node validation, thus we can use dma_request_channel() instead
of __dma_request_channel() to keep kernel bisectable.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 8df127456f ("soc/tegra: pmc: Enable XUSB partitions on boot")
was added as a workaround to ensure that the XUSB powergates or domains
were turned on early during boot because as this time the Tegra XHCI
driver did not handle the power domains at all. Now that the Tegra XHCI
driver has been updated to properly managed the power domains, the
workaround to enable the XUSB power domain early has been removed. This
also means that we can now move the initialisation of the powergates
into the PMC driver probe. Therefore, move the powergate initialisation
into the PMC driver probe and return any errors detected. To handle any
errors, functions to cleanup and remove any power-domains registered
with the generic power-domain framework have been added.
Finally the initialisation of the 'powergates_available' bitmask is kept
in the PMC early init function to allow the legacy PMC powergate APIs to
be called during early boot for enabling secondary CPUs on 32-bit Tegra
devices.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Commit 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
added sysfs entries for Tegra reset source and level. However, these
sysfs are not removed on error and so if the registering of PMC device
is probe deferred, then the next time we attempt to probe the PMC device
warnings such as the following will be displayed on boot ...
sysfs: cannot create duplicate filename '/devices/platform/7000e400.pmc/reset_reason'
Fix this by calling device_remove_file() for each sysfs entry added on
failure. Note that we call device_remove_file() unconditionally without
checking if the sysfs entry was created in the first place, but this
should be OK because kernfs_remove_by_name_ns() will fail silently.
Fixes: 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Commit 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
added support for reading the Tegra reset source and level from sysfs.
However, there are a few issues with this commit which are ...
1. The number of reset sources for Tegra210 is defined as 5 but it
should be 6.
2. The number of reset sources for Tegra186 is defined as 13 but it
should be 15.
3. The SoC data variables num_reset_sources and num_reset_levels are
defined but never used.
Fix the above by ...
1. Removing the reset source 'AOTAG' from the tegra30_reset_sources
because this is only applicable for Tegra210.
2. Adding a new tegra210_reset_sources structure for Tegra210 reset
sources.
3. Correct the number of reset sources for Tegra210 and Tegra186 by
using the ARRAY_SIZE macro.
4. Updating the functions reset_reason_show() and reset_level_show()
to check whether the value read is valid. While we are at it
clean-up these functions to remove an unnecessary u32 variable.
Fixes: 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
By implementing the acquire/release protocol, the resets can be shared
with other drivers that also adhere to this protocol. This will be used
for example by the SOR driver to put hardware into a known good state,
irrespective of whether or not the power domain can be reset.
Signed-off-by: Thierry Reding <treding@nvidia.com>
As usual, the drivers/tee and drivers/reset subsystems get merged
here, with the expected set of smaller updates and some new hardware
support. The tee subsystem now supports device drivers to be attached
to a tee, the first example here is a random number driver with its
implementation in the secure world.
Three new power domain drivers get added for specific chip families:
- Broadcom BCM283x chips (used in Raspberry Pi)
- Qualcomm Snapdragon phone chips
- Xilinx ZynqMP FPGA SoCs
One new driver is added to talk to the BPMP firmware on NVIDIA
Tegra210
Existing drivers are extended for new SoC variants from NXP,
NVIDIA, Amlogic and Qualcomm.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"As usual, the drivers/tee and drivers/reset subsystems get merged
here, with the expected set of smaller updates and some new hardware
support. The tee subsystem now supports device drivers to be attached
to a tee, the first example here is a random number driver with its
implementation in the secure world.
Three new power domain drivers get added for specific chip families:
- Broadcom BCM283x chips (used in Raspberry Pi)
- Qualcomm Snapdragon phone chips
- Xilinx ZynqMP FPGA SoCs
One new driver is added to talk to the BPMP firmware on NVIDIA
Tegra210
Existing drivers are extended for new SoC variants from NXP, NVIDIA,
Amlogic and Qualcomm"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (113 commits)
tee: optee: update optee_msg.h and optee_smc.h to dual license
tee: add cancellation support to client interface
dpaa2-eth: configure the cache stashing amount on a queue
soc: fsl: dpio: configure cache stashing destination
soc: fsl: dpio: enable frame data cache stashing per software portal
soc: fsl: guts: make fsl_guts_get_svr() static
hwrng: make symbol 'optee_rng_id_table' static
tee: optee: Fix unsigned comparison with less than zero
hwrng: Fix unsigned comparison with less than zero
tee: fix possible error pointer ctx dereferencing
hwrng: optee: Initialize some structs using memset instead of braces
tee: optee: Initialize some structs using memset instead of braces
soc: fsl: dpio: fix memory leak of a struct qbman on error exit path
clk: tegra: dfll: Make symbol 'tegra210_cpu_cvb_tables' static
soc: qcom: llcc-slice: Fix typos
qcom: soc: llcc-slice: Consolidate some code
qcom: soc: llcc-slice: Clear the global drv_data pointer on error
drivers: soc: xilinx: Add ZynqMP power domain driver
firmware: xilinx: Add APIs to control node status/power
dt-bindings: power: Add ZynqMP power domain bindings
...
The tegra timer is necessary for Tegra210 to support CPU idle power-down
state. So select it by default.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
On Tegra210 systems with new enough boot software, direct register
accesses to PMC register space from the non-secure world are not
allowed. Instead a monitor call may be used to read and write PMC
registers.
Add code to detect such a system by attempting to write a scratch
register and detecting if the write happened or not. If not, we switch
to doing all register accesses through the monitor call.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
It's not strictly necessary to initialize the fields in struct
tegra_pmc_soc if they are 0/false. However, we already initialize them
explicitly even if unnecessary, so keep doing that for consistency.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Some recently added code used weird alignment and indentation. Fix these
occurrences to make them consistent with the rest of the code.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Instead of using the global pmc variable, pass around a pointer where
possible. Also, replace most occurrences of pr_*() functions by their
equivalent dev_*() functions, reusing the pmc->dev pointer.
It's not possible to get completely rid of the global variable because
some of the public API that this driver exposes still relies on it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Now there are no more external users of tegra_powergate_is_powered(),
make this a local function.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Some of the fields in struct tegra_pmc had not been documented when they
were added. Add the missing kerneldoc.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
This will make it easier to insert new includes in the right place in
subsequent patches.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
