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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-23-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-22-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-21-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-20-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-19-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-18-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Switch to use modern name function devm_spi_alloc_host().
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-17-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-16-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-15-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-14-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-13-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-12-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-11-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-10-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-9-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-8-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-7-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-6-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-5-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master/slave to modern name host/target or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-4-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change legacy name master to modern name host or controller.
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-3-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Switch to use modern name function spi_alloc_host().
No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-2-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Since linux/of_platform.h had included linux/platform_device.h
and since that inclusion was removed, this driver now needs to include
the latter header file explicitly to prevent build errors:
drivers/spi/spi-mpc52xx.c: In function 'mpc52xx_spi_probe':
drivers/spi/spi-mpc52xx.c:396:20: error: invalid use of undefined type 'struct platform_device'
and more like that.
Fixes: 0d18bcdebb2f ("of: Stop circularly including of_device.h and of_platform.h")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org
Link: https://lore.kernel.org/r/20231208185927.14124-1-rdunlap@infradead.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Update DMA mapping and using logic in the documentation to follow what
the code does.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231208170436.3309648-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Replace master/slave by host/peripheral language in the documentation.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231208170436.3309648-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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AMD-Xilinx GQSPI controller has two advanced mode that allows the
controller to consider two flashes as one single device.
One of these two mode is the parallel mode in which each byte of data is
stored in both devices, the even bits in the lower flash & the odd bits in
the upper flash. The byte split is automatically handled by the QSPI
controller.
The other mode is the stacked mode in which both the flashes share the
same SPI bus but each of the device contain half of the data. In this mode,
the controller does not follow CS requests but instead internally wires the
two CS levels with the value of the most significant address bit.
For supporting both these modes SPI core need to be updated for providing
multiple CS for a single SPI device.
For adding multi CS support the SPI device need to be aware of all the CS
values. So, the "chip_select" member in the spi_device structure is now an
array that holds all the CS values.
spi_device structure now has a "cs_index_mask" member. This acts as an
index to the chip_select array. If nth bit of spi->cs_index_mask is set
then the driver would assert spi->chip_select[n].
In parallel mode all the chip selects are asserted/de-asserted
simultaneously and each byte of data is stored in both devices, the even
bits in one, the odd bits in the other. The split is automatically handled
by the GQSPI controller. The GQSPI controller supports a maximum of two
flashes connected in parallel mode. A SPI_CONTROLLER_MULTI_CS flag bit is
added in the spi controller flags, through ctlr->flags the spi core
will make sure that the controller is capable of handling multiple chip
selects at once.
For supporting multiple CS via GPIO the cs_gpiod member of the spi_device
structure is now an array that holds the gpio descriptor for each
chipselect.
CS GPIO is not tested on our hardware, but it has been tested by @Stefan
https://lore.kernel.org/all/005001da1efc$619ad5a0$24d080e0$@opensource.cirrus.com/
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Tested-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231125092137.2948-4-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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In preparation for adding multiple CS support for a device, set/get
functions were introduces accessing spi->chip_select in
'commit 303feb3cc06a ("spi: Add APIs in spi core to set/get
spi->chip_select and spi->cs_gpiod")'.
Replace spi->chip_select with spi_get_chipselect() API.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20231125092137.2948-3-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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In preparation for adding multiple CS support for a device, set/get
functions were introduces accessing spi->chip_select in
'commit 303feb3cc06a ("spi: Add APIs in spi core to set/get
spi->chip_select and spi->cs_gpiod")'.
Replace spi->chip_select with spi_get_chipselect() API.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20231125092137.2948-2-amit.kumar-mahapatra@amd.com
Signed-off-by: Lee Jones <lee@kernel.org>
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If there is an issue with the AXI SPI Engine hardware a scheduled
transfer might never be completed and spi_sync() will block forever.
This due to the uninterruptible wait for completion waiting for the
spi_finalize_current_message() that never comes.
Add a watchdog timer that will abort a transfer 5 seconds after it has
been started. This will potentially leave the hardware in a broken state
but it allows software to recover and allow to better diagnose the
underlying issue.
Co-developed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-9-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Now that the AXI SPI Engine driver has support for the various CS delays
requested through struct spi_message, we don't need to add a separate
delay to the CS assertion instruction. Otherwise, we end up with longer
than requested delays.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-8-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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This modifies the ADI AXI SPI Engine driver to restore the clkdiv
configuration register at the end of a SPI message. Having the clkdiv in
a known state is needed to be able to add a new command in the future
that only performs a delay without any SPI transfers. Furthermore having
that state be the smallest possible divider will allow these delays to
have the highest possible precision.
Changing the initial value of clk_div from -1 to 1 is now possible
because we know the function will always be called with a known clkdiv
config register state. Making this change will also have the effect of
not emitting a clkdiv configuration register instruction in cases where
the maximum sclk rate is used. Having one less instruction to process
reduces delays on the bus which will be beneficial when we implement
offload support to enable reading data from devices at very high rates.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-7-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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This adds handling of xfer->cs_change_delay to the AXI SPI Engine
driver.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-6-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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This replaces the xfer parameter of spi_engine_gen_sleep() in the AXI
SPI Engine driver with parameters for the delay in nanoseconds and the
SPI SCLK rate. This will allow this function to be used by callers in
the future that do not have a spi_transfer struct.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-5-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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This fixes the sleep ticks calculation when generating sleep
instructions in the AXI SPI Engine driver. The previous calculation
was ignoring delays less than one microsecond and missed a microsecond
to second conversion factor.
This fixes the first issue by not rounding to microseconds. Now that
xfer->effective_speed_hz is guaranteed to be set correctly, we can use
that to simplify the calculation. This new calculation replaces the old
incorrect math.
Also add unit suffix to the delay variable for clarity while we are
touching this.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-4-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Now that host->max_speed_hz and xfer->effective_speed_hz are properly
set, we can use them instead of having to do more complex calculations
to get the clock divider for each transfer.
This removes the spi_engine_get_clk_div() function and replaces it with
just dividing the two clock rates. Since the hardware register value is
the divider minus one, we need to subtract one. Subtracting one was
previously done in the spi_engine_get_clk_div() function.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-3-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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This adds a new spi_engine_precompile_message() function to the ADI AXI
SPI Engine driver to populate the xfer->effective_speed_hz field since
the SPI core doesn't/can't do this for us.
This driver is already using spi_delay_to_ns() which depends on
effective_speed_hz to get an accurate value in some cases.
Having an effective_speed_hz value can also be used in future changes
to simplify other code.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-2-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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In the AXI SPI Engine driver, the spi_engine_compile_message() function
does not return any error and none of the callers check the return
value. So we can change the return type to void and drop the return 0.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-1-063672323fce@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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cqspi_jh7110_clk_init() is called after clk_prepare_enable(cqspi->clk),
if it fails, it should goto label 'probe_reset_failed' to disable
cqspi->clk.
In the error path after calling cqspi_jh7110_clk_init(),
cqspi_jh7110_disable_clk() need be called.
Fixes: 33f1ef6d4eb6 ("spi: cadence-quadspi: Add clock configuration for StarFive JH7110 QSPI")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20231129081147.628004-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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When the software reset command isn't supported, we now stop reporting
the warning message to avoid unnecessary warnings and potential confusion.
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Pratyush Yadav <pratyush@kernel.org>
Signed-off-by: "Chia-Lin Kao (AceLan)" <acelan.kao@canonical.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20231129064311.272422-2-acelan.kao@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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This commit updates the SPI subsystem, particularly affecting "SPI MEM"
drivers and core parts, by replacing the -ENOTSUPP error code with
-EOPNOTSUPP.
The key motivations for this change are as follows:
1. The spi-nor driver currently uses EOPNOTSUPP, whereas calls to spi-mem
might return ENOTSUPP. This update aims to unify the error reporting
within the SPI subsystem for clarity and consistency.
2. The use of ENOTSUPP has been flagged by checkpatch as inappropriate,
mainly being reserved for NFS-related errors. To align with kernel coding
standards and recommendations, this change is being made.
3. By using EOPNOTSUPP, we provide more specific context to the error,
indicating that a particular operation is not supported. This helps
differentiate from the more generic ENOTSUPP error, allowing drivers to
better handle and respond to different error scenarios.
Risks and Considerations:
While this change is primarily intended as a code cleanup and error code
unification, there is a minor risk of breaking user-space applications
that rely on specific return codes for unsupported operations. However,
this risk is considered low, as such use-cases are unlikely to be common
or critical. Nevertheless, developers and users should be aware of this
change, especially if they have scripts or tools that specifically handle
SPI error codes.
This commit does not introduce any functional changes to the SPI subsystem
or the affected drivers.
Signed-off-by: "Chia-Lin Kao (AceLan)" <acelan.kao@canonical.com>
Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20231129064311.272422-1-acelan.kao@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Except for polling mode, this driver's transfer_one_message() makes use
of interrupt handler and tasklet. This is problematic because
spi_transfer_delay_exec(), who may sleep, is called in interrupt handler
and tasklet. This causes the following warning:
BUG: sleeping function called from invalid context at drivers/spi/spi.c:1428
Switch to use the default spi_transfer_one_message() instead, which
calls spi_transfer_delay_exec() appropriately.
Signed-off-by: Nam Cao <namcao@linutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/ae1940abd6ff6a9e77b4373cff60007c641a0c6c.1701274975.git.namcao@linutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
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The default message transfer implementation - spi_transfer_one_message -
invokes the specific device driver's transfer_one(), then waits for
completion. However, there is no mechanism for the device driver to
report failure in the middle of the transfer.
Introduce SPI_TRANS_FAIL_IO for drivers to report transfer failure.
Signed-off-by: Nam Cao <namcao@linutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/4b420dac528e60f122adde16851da88e4798c1ea.1701274975.git.namcao@linutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
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Use device life-cycle managed register function to simplify probe error
path and eliminate need for explicit remove function.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20231117161006.87734-5-afd@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Enable GENERIC_BUG_RELATIVE_POINTERS which will store 32-bit relative
offsets to the bug address and the source file name instead of 64-bit
absolute addresses. This effectively reduces the size of the
bug_table[] array by half on 64-bit kernels.
Signed-off-by: Helge Deller <deller@gmx.de>
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Those return codes are only defined for the parisc architecture and
are leftovers from when we wanted to be HP-UX compatible.
They are not returned by any Linux kernel syscall but do trigger
problems with the glibc strerrorname_np() and strerror() functions as
reported in glibc issue #31080.
There is no need to keep them, so simply remove them.
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: Bruno Haible <bruno@clisp.org>
Closes: https://sourceware.org/bugzilla/show_bug.cgi?id=31080
Cc: stable@vger.kernel.org
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Make sure that the __bug_table section gets 32- or 64-bit aligned,
depending if a 32- or 64-bit kernel is being built.
Mark it non-writeable and use .blockz instead of the .org assembler
directive to pad the struct.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v6.0+
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Make sure the .PARISC.unwind section will be 32-bit aligned.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v6.0+
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On parisc we need 16-byte alignment for variables which are used for
locking. Mark the __lock_aligned attribute acordingly so that the
.data..lock_aligned section will get that alignment in the generated
object files.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v6.0+
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The jump_table stores two 32-bit words and one 32- (on 32-bit kernel)
or one 64-bit word (on 64-bit kernel).
Ensure that the last word is always 64-bit aligned on a 64-bit kernel
by aligning the whole structure on sizeof(long).
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v6.0+
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Yang Yingliang
Randy Dunlap
Andy Shevchenko
Amit Kumar Mahapatra
David Lechner
Chia-Lin Kao (AceLan)
Nam Cao
Andrew Davis
Linus Torvalds
Helge Deller