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The reset-simple code can be useful for drivers outside of drivers/reset
that have a few reset controls as part of their features. Let's move it to
include/linux/reset.
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Avoid declaring extern functions in c files. To make sure function
definition and usage don't get out of sync, declare socfpga_reset_init
in a common header.
Suggested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
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Create a separate reset driver that uses the reset operations in
reset-simple. The reset driver for the SoCFPGA platform needs to
register early in order to be able bring online timers that needed
early in the kernel bootup.
We do not need this early reset driver for Stratix10, because on
arm64, Linux does not need the timers are that in reset. Linux is
able to run just fine with the internal armv8 timer. Thus, we use
a new binding "altr,stratix10-rst-mgr" for the Stratix10 platform.
The Stratix10 platform will continue to use the reset-simple platform
driver, while the 32-bit platforms(Cyclone5/Arria5/Arria10) will use
the early reset driver.
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
[p.zabel@pengutronix.de: fixed socfpga of_device_id in reset-simple]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Add reset line status readback, inverted status support, and socfpga
device tree quirks to the simple reset driver, and use it to replace
the socfpga driver.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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The SoCFPGA Stratix10 reset controller has 32-bit registers. Thus, we
cannot use BITS_PER_LONG in computing the register and bit offset. Instead,
we should be using the width of the hardware register for the calculation.
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The SoC-FPGA reset controller driver defines NR_BANKS as 4 and uses that define
for two unrelated purposes. It is used
1. as an increment for reset line banks which are 32-bit registers with 4-byte
aligned addresses.
2. as the total number of reset line banks which together with the number of
resets per bank (32) limits the total number of useable resets to 128 and the
highest useable reset ID to 127.
This is clearly wrong as there are resets with higher IDs than 127 defined in
include/dt-bindings/reset/altr,rst-mgr.h and altr,rst-mgr-a10.h.
The patch introduces a new define BANK_INCREMENT for calculating the register
addresses as before and increases NR_BANKS to 8 for useable reset IDs up to 255.
Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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The Kconfig currently controlling compilation of this code is:
drivers/reset/Kconfig:config RESET_SOCFPGA
drivers/reset/Kconfig: bool "SoCFPGA Reset Driver" if COMPILE_TEST
drivers/reset/Kconfig: default ARCH_SOCFPGA
or
arch/arm/mach-socfpga/Kconfig:menuconfig ARCH_SOCFPGA
arch/arm/mach-socfpga/Kconfig: bool "Altera SOCFPGA family" if ARCH_MULTI_V7
...meaning that it currently is not being built as a module by anyone.
Lets remove the small amount of modular evidence that remains, so that
when reading the driver there is no doubt it is builtin-only.
Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.
We also delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.
Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Since we can just add it to membase once, there is no need to store
modrst_offset separately, and to repeat the addition with every access.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
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Use devm_reset_controller_register() for the reset controller
registration and drop the .remove callback.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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The socfpga_reset_ops structure is never modified. Make it const.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Currently, reset_controller_register() always return 0, but it would
be better to check its return code.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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In order for the Arria10 to be able to re-use the reset driver for SoCFPGA
Cyclone5/Arria5, we need to read the 'altr,modrst-offset' property from the
device tree entry. The 'altr,modrst-offset' property is the first register
into the reset manager that is used for bringing peripherals out of reset.
The driver assumes a modrst-offset of 0x10 in order to support legacy
Cyclone5/Arria5 hardware.
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core update from Greg KH:
"Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes,
just removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There
are some ath9k patches coming in through this tree that have been
acked by the wireless maintainers as they relied on the debugfs
changes.
Everything has been in linux-next for a while"
* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
fs: debugfs: add forward declaration for struct device type
firmware class: Deletion of an unnecessary check before the function call "vunmap"
firmware loader: fix hung task warning dump
devcoredump: provide a one-way disable function
device: Add dev_<level>_once variants
ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
ath: use seq_file api for ath9k debugfs files
debugfs: add helper function to create device related seq_file
drivers/base: cacheinfo: remove noisy error boot message
Revert "core: platform: add warning if driver has no owner"
drivers: base: support cpu cache information interface to userspace via sysfs
drivers: base: add cpu_device_create to support per-cpu devices
topology: replace custom attribute macros with standard DEVICE_ATTR*
cpumask: factor out show_cpumap into separate helper function
driver core: Fix unbalanced device reference in drivers_probe
driver core: fix race with userland in device_add()
sysfs/kernfs: make read requests on pre-alloc files use the buffer.
sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
fs: sysfs: return EGBIG on write if offset is larger than file size
...
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Populate the reset_status callback for SOCFPGA.
Signed-off-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add a reset-controller driver for the socfpga platform.
The reset-controller has four banks with up to 32 entries all encapsulated in
one module block.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
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Notes:
Changes since v2:
- remove superfluous ret in probe function
- add Acked-by
Changes since v1:
- use BITS_PER_LONG everywhere instead of MAX_BANK_WIDTH
- print pdev->dev.of_node->full_name on error
- use proper IS_ERR/PTR_ERR
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