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amba_id are not supposed to change at runtime. All functions
working with const amba_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The newly added dynamic burst code produces a harmless warning
on big-endian configurations:
drivers/spi/spi-imx.c: In function 'spi_imx_buf_rx_swap_u32':
drivers/spi/spi-imx.c:284:15: error: unused variable 'bytes_per_word' [-Werror=unused-variable]
unsigned int bytes_per_word;
^~~~~~~~~~~~~~
drivers/spi/spi-imx.c: In function 'spi_imx_buf_tx_swap_u32':
drivers/spi/spi-imx.c:319:15: error: unused variable 'bytes_per_word' [-Werror=unused-variable]
unsigned int bytes_per_word;
This adds another #ifdef around the variable declaration matching
the one on the use.
Fixes: 1673c81d9435 ("spi: imx: dynamic burst length adjust for PIO mode")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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spi framework should allocate bus number dynamically either
via Linux IDR or spi alias for master drivers. This patch deletes
code pertaining to manual allocation of spi bus number in spi omap2
master driver.
Signed-off-by: Suniel Mahesh <sunil.m@techveda.org>
Signed-off-by: Karthik Tummala <karthik@techveda.org>
Tested-by: Karthik Tummala <karthik@techveda.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Earlier commit:
"spi: Pick spi bus number from Linux idr or spi alias"
(SHA1:9b61e302210eba55768962f2f11e96bb508c2408)
has introduced some checkpatch issues. As pointed by
Lukas Wunner this patch does the following:
- remove whitespaces
- fix warnings, suspect code indent for conditional statements
- fix errors, code indent should use tabs
- remove spaces at the start of the line
Signed-off-by: Suniel Mahesh <sunil.m@techveda.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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previously burst length (BURST_LENGTH) is always set to equal
to bits_per_word, causes a 10us gap between each word in
transfer, which significantly affects performance.
This patch uses 32 bits transfer to simulate lower bits transfer,
and adjusts burst length runtimely to use biggeest burst length
as possible to reduce the gaps in transfer for PIO mode.
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Modify existing code, for automatically picking the spi bus number based
on Linux idr scheme as mentioned in FIXME.
This patch does the following:
(a) Remove the now unnecessary code which was allocating bus numbers using
ATOMIC_INIT and atomic_dec_return macros.
(b) If we have an alias, pick the bus number from alias ID
(c) Convert to linux idr interface
Signed-off-by: Suniel Mahesh <sunil.m@techveda.org>
Signed-off-by: Karthik Tummala <karthik@techveda.org>
Tested-by: Karthik Tummala <karthik@techveda.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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CTRLR1 is number of data frames, when rx only.
When data frame is 8 bit, CTRLR1 is len-1.
When data frame is 16 bit, CTRLR1 is (len/2)-1.
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The patterns for accessing the TX/RX data registers is the same for the IRQ
and non-IRQ paths. Consolidate the duplicated code into shared helper
functions.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The Altera SPI driver currently uses the spi-bitbang infrastructure for
transfer queue management, but non of the bitbang functionality itself.
This is because when the driver was written this was the only way to not
have to do queue management in the driver itself.
Nowadays transfer queue management is available from the SPI driver core
itself and using the bitbang infrastructure just adds an additional level
of indirection.
Switch the driver over to using the core queue management directly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The spi on rv1108 is the same as other rockchip based
socs, add compatible string for it.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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On 64-bit systems, pointers are wider than 'int' variables,
so we get a warning about a cast between them:
drivers/spi/spi-qup.c:1060:23: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
This changes the code to use the correct uintptr_t cast.
Fixes: 4d023737b2ef ("spi: qup: Fix QUP version identify method")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The added conditionals in this function apparently confused
gcc to the point that it no longer sees the code is safe and
instead shows a false-positive warning:
drivers/spi/spi-qup.c: In function 'spi_qup_transfer_one':
drivers/spi/spi-qup.c:507:28: error: 'tx_nents' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/spi/spi-qup.c:464:17: note: 'tx_nents' was declared here
drivers/spi/spi-qup.c:505:28: error: 'rx_nents' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/spi/spi-qup.c:464:7: note: 'rx_nents' was declared here
This moves the initialization to a place that makes it obvious
to the compiler.
Fixes: 5884e17ef3cb ("spi: qup: allow multiple DMA transactions per spi xfer")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Update this driver to the default implementation of transfer_one_message().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The currently in-flight message can be found from the spi master.
Use that instead and remove the private data pointer.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Change the parameters for some of the functions so that the spi_master
pointer is passed around instead of the private data ep93xx_spi pointer.
This allows removing the 'pdev' member of the private data and will
help with some later cleanup.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Mark Brown <broonie@kernel.org>
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These are each only called once. Just absorb them into the callers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
[chris: use u32 instead of unsigned int]
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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This driver currently enables the hardware at the start of every
message and disabled it when the message is complete. Make it a
bit smarter by adding the prepare_transfer_hardware() and
unprepare_transfer_hardware() callbacks so that the core can
enable/disable the hardware based on spi message queue.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
[chris: use u32 instead of unsigned int]
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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All the EP93xx SSP registers are 32-bit. Since most of the upper bits
are unused, this driver tries to be tricky and uses 8 or 16-bit I/O to
access the registers. This really just adds a bit of confusion.
Simplify the I/O by using 32-bit read/write's for all of the registers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
[chris: use u32 instead of unsigned int]
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The io wrappers just add obfuscation to the driver. Remove them.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Mark Brown <broonie@kernel.org>
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platform_get_irq() returns an error code, but the spi-sh driver
ignores it and always returns -ENODEV. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.
Print and propagate the return value of platform_get_irq on failure.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Use of_device_get_match_data to identify QUP version instead
of of_device_is_compatible.
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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This patch fixes an issue where a SPI transaction has completed, but the
done condition is missed. This occurs because at the time of interrupt the
MAX_INPUT_DONE_FLAG is not asserted. However, in the process of reading
blocks of data from the FIFO, the last portion of data comes in.
The opflags read at the beginning of the irq handler no longer matches the
current opflag state. To get around this condition, the block read
function should update the opflags so that done detection is correct after
the return.
Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Much like the block mode changes, we are breaking up DMA transactions
into 64K chunks so we can reset the QUP engine.
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Take specific sgl and nent to be prepared. This is in
preparation for splitting DMA into multiple transacations, this
contains no code changes just refactoring.
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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This let's you write more to the SPI bus than 64K-1 which is important
if the block size of a SPI device is >= 64K or some other device wants
to do something larger.
This has the benefit of completely removing spi_message from the spi-qup
transactions
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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DMA transactions should only only need to call io_config only once, but
block mode might call it several times to setup several transactions so
it can handle reads/writes larger than the max size per transaction, so
we move the call to the do_ functions.
This is just refactoring, there should be no functional change
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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This is in preparation for handling transactions larger than
64K-1 bytes in block mode, which is currently unsupported and
quietly fails.
We need to break these into two functions 1) prep is
called once per spi_message and 2) io_config is called
once per spi-qup bus transaction
This is just refactoring, there should be no functional
change
Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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This patch corrects the behavior of the BLOCK
transactions. During block transactions, the controller
must be read/written to in block size transactions.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Wait to signal done until we get all of the interrupts we are expecting
to get for a transaction. If we don't wait for the input done flag, we
can be in between transactions when the done flag comes in and this can
mess up the next transaction.
While here cleaning up the code which sets controller->xfer = NULL and
restores it in the ISR. This looks to be some debug code which is not
required.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add i/o completion timeout for DMA and PIO modes.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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To operate in DMA mode, the buffer should be aligned and
the size of the transfer should be a multiple of block size
(for v1). And the no. of words being transferred should
be programmed in the count registers appropriately.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Enable chip select support for QUP versions later than v1. The
chip select support was broken in QUP version 1. Hence the chip
select support was removed earlier in an earlier commit
(4a8573abe "spi: qup: Remove chip select function"). Since the
chip select support is functional in recent versions of QUP,
re-enabling it for QUP versions later than v1.
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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platform_get_irq() returns an error code, but the spi-bcm63xx-hsspi
driver ignores it and always returns -ENXIO. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af
Print and propagate the return value of platform_get_irq on failure.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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platform_get_irq() returns an error code, but the spi-bcm63xx driver
ignores it and always returns -ENXIO. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af
Print and propagate the return value of platform_get_irq on failure.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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platform_get_irq() returns an error code, but the spi-xlp driver ignores
it and always returns -EINVAL. This is not correct and, prevents
-EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af
Print and propagate the return value of platform_get_irq on failure.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Context could be lost across the suspend and resume.
Reinit the driver to tide over.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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call pm_runtime_enable after set_active other wise it will
enable clock always.
Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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When the audio driver selects CONFIG_PXA_SSP on ARCH_MMP as a
loadable module, and the PXA SPI driver is built-in, we get
a link error in the SPI driver:
drivers/spi/spi-pxa2xx.o: In function `pxa2xx_spi_remove':
spi-pxa2xx.c:(.text+0x5f0): undefined reference to `pxa_ssp_free'
drivers/spi/spi-pxa2xx.o: In function `pxa2xx_spi_probe':
spi-pxa2xx.c:(.text+0xeac): undefined reference to `pxa_ssp_request'
spi-pxa2xx.c:(.text+0x1468): undefined reference to `pxa_ssp_free'
spi-pxa2xx.c:(.text+0x15bc): undefined reference to `pxa_ssp_free'
The problem is that the PXA SPI driver only uses 'select SSP'
specifically when building it for PXA, but we can also build it
for PCI, which is meant for Intel x86 SoCs that use the same SPI
block. When the sound driver forces the SSP to be a loadable
module, the IS_ENABLED() check in include/linux/pxa2xx_ssp.h
triggers but the spi driver can't reference the exported symbols.
I had a different approach before, making the PCI case depend
on X86, which fixed the problem by avoiding the MMP case.
This goes a different route, making the driver select PXA_SSP
also on MMP, which has an SSP that none of the boards in mainline
Linux use for SPI. There is no harm in always enabling the build
on MMP (PCI or not PCI), so I do that too, to document that this
hardware is actually available on MMP.
Link: https://patchwork.kernel.org/patch/8879921/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The runtime suspend callback might be called by pm domain framework at
suspend_noirq stage. It would try to disable the clocks which already
been disabled by rockchip_spi_suspend.
Call pm_runtime_force_suspend/pm_runtime_force_resume when
suspend/resume to avoid that.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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We are assuming clocks enabled when calling rockchip_spi_remove, which
is not always true. Those clocks might already been disabled by the
runtime PM at that time.
Call pm_runtime_get_sync before trying to disable clocks to avoid that.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Slightly rework return value handling, no functional changes.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Use a bit more compact of_property_read_bool() calls instead of the
of_find_property() calls -- symmetrically with the of_property_read_u32()
calls already done in of_spi_parse_dt().
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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We still need to request/free GPIOs passed via the legacy path of
pxa2xx_spi_chip::gpio_cs, but we can use the gpiod API otherwise.
Consistently use the descriptor API instead of the legacy one.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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MacBooks and MacBook Pros introduced since 2015 return empty _CRS data
for SPI slaves, causing device initialization to fail. Most of the
information that would normally be conveyed via _CRS is available
through ACPI device properties instead, so take advantage of them.
The meaning and appropriate usage of the device properties was reverse
engineered by Ronald Tschalär and carried over from these commits
authored by him:
https://github.com/cb22/macbook12-spi-driver/commit/9a416d699ef4
https://github.com/cb22/macbook12-spi-driver/commit/0c34936ed9a1
According to Ronald, the device properties have the following meaning:
spiSclkPeriod /* period in ns */
spiWordSize /* in number of bits */
spiBitOrder /* 1 = MSB_FIRST, 0 = LSB_FIRST */
spiSPO /* clock polarity: 0 = low, 1 = high */
spiSPH /* clock phase: 0 = first, 1 = second */
spiCSDelay /* delay between cs and receive on reads in 10 us */
resetA2RUsec /* active-to-receive delay? */
resetRecUsec /* receive delay? */
Reported-by: Leif Liddy <leif.liddy@gmail.com>
Tested-by: Ronald Tschalär <ronald@innovation.ch>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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GPIO descriptors, when being requested, may configure pin at the same
time. In case of SPI chip select we shouldn't do any assumptions of the
state of pin since we don't know yet what chip is connected there and if
it uses high or low active state. So, leave the state of pin as is until
transfer will start.
Fixes: 99f499cd6504 ("spi: pxa2xx: Add support for GPIO descriptor chip selects")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westeberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The newly added broadcom qspi driver in drivers/spi produces a build
warning when CONFIG_MTD is disabled:
include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp]
There has been discussion on this in the link provided below. This fix in
SPI controller drivers implementing the ->spi_flash_read handler, now uses the
settings provided inside the 'struct spi_flash_read_message' parameter instead
of hardcoding them. Made changes to bcm_qspi_bspi_set_flex_mode() to set the BSPI
controller using the passed msg structure and remove the need to include
<linux/mtd/spi-nor.h> file by removing all use of SPINOR_OP_READ* macros.
Fixes: 4e3b2d236fe0 ("spi: bcm-qspi: Add BSPI spi-nor flash controller driver")
Link: https://patchwork.kernel.org/patch/9624585/
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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There is a valid case to call setup() following by setup_cs() several
times for the same chip.
With the commit
676a4e3bab44 ("spi: pxa2xx: Only claim CS GPIOs when the slave device is created")
it is not possible anymore due to GPIO line being requested already
during the first call to setup_cs().
For now, revert the commit to make things work again.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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add_uevent_var() can fail, let caller know about this.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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