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Use device_reset api to replace duplicate code in driver to call
reset_control_get api with reset handle.
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/20220222175611.58051-2-kyarlagadda@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The pci_get_slot() increases its reference count, the caller
must decrement the reference count by calling pci_dev_put().
Fixes: 743485ea3bee ("spi: pxa2xx-pci: Do a specific setup in a separate function")
Fixes: 25014521603f ("spi: pxa2xx-pci: Enable DMA for Intel Merrifield")
Reported-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220223191637.31147-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
In order to make the underneath API easier to change in the future,
prevent users from dereferencing fwnode from struct device.
Instead, use the specific dev_fwnode() API for that.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220223191948.31325-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for slave DT property spi-lsb-first, i.e., SPI_LSB_FIRST mode.
Duplicate the inline helpers bitbang_txrx_be_cpha{0,1} as LE versions.
Conditionally call them from all the spi-gpio txrx_word callbacks.
Some alternatives to this implementation approach were discussed back
then [0], but eventually it was considered reasonable.
[0] https://lore.kernel.org/linux-arm-kernel/20191212033952.5967-8-afaerber@suse.de/
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://lore.kernel.org/r/feac3377-4ad1-77d8-9a18-3588d80fb909@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
STM32F4_SPI_SR_RXNE and STM32F4_SPI_SR_OVR are distinct bits in the same
status register. ~STM32F4_SPI_SR_OVR | STM32F4_SPI_SR_RXNE is thus
equal to ~STM32F4_SPI_SR_OVR.
The original intention was likely for transmission-only transfers to
ignore interrupts both for when the Rx queue has bytes (RXNE) as well
as when these bytes haven't been read in time (OVR).
Fix the typo by adding the missing parenthesis.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.kernel.org/r/20220201115142.3999860-1-a.fatoum@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Use dedicated function sysfs_emit() that does some extra checking,
e.g. to ensure that no more than PAGESIZE bytes are written.
In addition add a trailing newline to the output, that makes it
better readable from the console.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/56e1588d-d53b-73e9-fdc8-7fe30bf91f11@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Eliminate the follow smatch warning:
drivers/spi/spi-sunplus-sp7021.c:379 sp7021_spi_slave_transfer_one()
warn: inconsistent indenting
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220217010024.111904-1-yang.lee@linux.alibaba.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Jon Lin <jon.lin@rock-chips.com>:
A collection of fixes and support for new features in the Rockchip
driver.
base-commit: 80808768e41324d2e23de89972b5406c1020e6e4
The interrupt status bit of the previous error data transmition will
affect the next operation and cause continuous SPI transmission failure.
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-7-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
the wakeup interrupt handler which is guaranteed not to run while
@resume noirq() is being executed. the patch can help to avoid the
wakeup source try to access spi when the spi is in suspend mode.
Signed-off-by: shengfei Xu <xsf@rock-chips.com>
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-6-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
After power up, the cs and clock is in default status, and the cs-high
and clock polarity dts property configuration will take no effect until
the calling of rockchip_spi_config in the first transmission.
So preset them to make sure a correct voltage before the first
transmission coming.
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-5-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The spi which's version is higher than ver 2 will automatically
enable this feature.
If the length of master transmission is uncertain, the RK spi slave
is better to automatically stop after cs inactive instead of waiting
for xfer_completion forever.
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-4-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
After slave abort, all DMA should be stopped, or it will affect the
next transmission and maybe abort again.
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-3-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Commit 209043554915 ("spi: amd: Add support for version AMDI0062")
removed the cast ACPI_PTR() for no good reason. This wrapper is
important to make sure that the driver can be compiled with or without
CONFIG_ACPI enabled, useful for compiling test. Give back the cast so
compilation works again.
Fixes: 209043554915 ("spi: amd: Add support for version AMDI0062")
Signed-off-by: André Almeida <andrealmeid@collabora.com>
Link: https://lore.kernel.org/r/20220216162719.116062-1-andrealmeid@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Mika Westerberg <mika.westerberg@linux.intel.com>:
Based on discussion on the patch I sent some time ago here:
http://lists.infradead.org/pipermail/linux-mtd/2021-June/086867.html
it turns out that the preferred way to deal with the SPI flash controller
drivers is through SPI MEM which is part of Linux SPI subsystem.
This series does that for the intel-spi driver. This also renames the
driver to follow the convention used in the SPI subsystem. The first patch
improves the write protection handling to be slightly more safer. The
following two patches do the conversion itself. Note the Intel SPI flash
controller only allows commands such as read, write and so on and it
internally uses whatever addressing etc. it figured from the SFDP on the
flash device.
base-commit: e783362eb54cd99b2cac8b3a9aeac942e6f6ac07
All drivers using GPIOs as chip select have been rewritten to use
GPIO descriptors passing the ->use_gpio_descriptors flag. Retire
the code and fields used by the legacy GPIO API.
Do not drop the ->use_gpio_descriptors flag: it now only indicates
that we want to use GPIOs in addition to native chip selects.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220210231954.807904-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Clang build fails with
spi-sunplus-sp7021.c:405:2: error: variable 'ret' is used
uninitialized whenever switch default is taken
default:
simplify code
Restore initializing ret. and add return error at default
Fixes: 47e8fe57a66f ("spi: Modify irq request position and modify parameters")
Reported-by: Tom Rix <trix@redhat.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Li-hao Kuo <lhjeff911@gmail.com>
Link: https://lore.kernel.org/r/7d91e6ce29f9a8df2c53a47b4b977664020e237a.1644805060.git.lhjeff911@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The preferred way to implement SPI-NOR controller drivers is through SPI
subsubsystem utilizing the SPI MEM core functions. This converts the
Intel SPI flash controller driver over the SPI MEM by moving the driver
from SPI-NOR subsystem to SPI subsystem and in one go make it use the
SPI MEM functions. The driver name will be changed from intel-spi to
spi-intel to match the convention used in the SPI subsystem.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mauro Lima <mauro.lima@eclypsium.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220209122706.42439-3-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for the AMD SPI controller version AMDI0062. Do this in a
modular way where's easy to add new versions.
Signed-off-by: André Almeida <andrealmeid@collabora.com>
Link: https://lore.kernel.org/r/20220211143155.75513-4-andrealmeid@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Some SPI-NAND chips do not have a proper on-die ECC engine providing
error correction/detection. This is particularly an issue on embedded
devices with limited resources because all the computations must
happen in software, unless an external hardware engine is provided.
These external engines are new and can be of two categories: external
or pipelined. Macronix is providing both, the former being already
supported. The second, however, is very SoC implementation dependent
and must be instantiated by the SPI host controller directly.
An entire subsystem has been contributed to support these engines which
makes the insertion into another subsystem such as SPI quite
straightforward without the need for a lot of specific functions.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220202144536.393792-1-miquel.raynal@bootlin.com
Implement the ->dirmap_create() and ->dirmap_read/write() hooks to
provide a fast path for read and write accesses.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Zhengxun Li <zhengxunli@mxic.com.tw>
Reviewed-by: Zhengxun Li <zhengxunli@mxic.com.tw>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-13-miquel.raynal@bootlin.com
Create the mxic_spi_mem_prep_op_cfg() helper to provide the content to
write to the register controlling the next IO command. This helper will
soon be used by the dirmap implementation and having this code
factorized out earlier will clarify this addition.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-12-miquel.raynal@bootlin.com
Create the mxic_spi_set_hc_cfg() helper to configure the HC_CFG
register. This helper will soon be used by the dirmap implementation and
having this code factorized out earlier will clarify this addition.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-11-miquel.raynal@bootlin.com
By working with external hardware ECC engines, we figured out that
Under certain circumstances, it is needed for the SPI controller to
check INT_TX_EMPTY and INT_RX_NOT_EMPTY in both receive and transmit
path (not only in the receive path). The delay penalty being
negligible, move this code in the common path.
Fixes: b942d80b0a39 ("spi: Add MXIC controller driver")
Cc: stable@vger.kernel.org
Suggested-by: Mason Yang <masonccyang@mxic.com.tw>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Zhengxun Li <zhengxunli@mxic.com.tw>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-10-miquel.raynal@bootlin.com
Soon the SPI-NAND core will need a way to request a SPI controller to
enable ECC support for a given operation. This is because of the
pipelined integration of certain ECC engines, which are directly managed
by the SPI controller itself.
Introduce a spi_mem_op additional field for this purpose: ecc.
So far this field is left unset and checked to be false by all
the SPI controller drivers in their ->supports_op() hook, as they all
call spi_mem_default_supports_op().
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-7-miquel.raynal@bootlin.com
Now that spi_mem_default_supports_op() has access to the static
controller capabilities (relating to memory operations), and now that
these capabilities have been filled by the relevant controllers, there
is no need for a specific helper checking only DTR operations, so let's
just kill spi_mem_dtr_supports_op() and simply use
spi_mem_default_supports_op() instead.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-6-miquel.raynal@bootlin.com
This controller has DTR support, so advertize it with a capability now
that the spi-controller structure contains this new field. This will
later be used by the core to discriminate whether an operation is
supported or not, in a more generic way than having different helpers.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-5-miquel.raynal@bootlin.com
This controller has DTR support, so advertize it with a capability now
that the spi-controller structure contains this new field. This will
later be used by the core to discriminate whether an operation is
supported or not, in a more generic way than having different helpers.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-4-miquel.raynal@bootlin.com
Controllers can now provide a spi-mem capabilities structure. Let's make
use of it in spi_mem_controller_default_supports_op(). As we want to
check for DTR operations as well as normal operations in a single
helper, let's pull the necessary checks from spi_mem_dtr_supports_op()
for now.
However, because no controller provide these extra capabilities, this
change has no effect so far.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-3-miquel.raynal@bootlin.com
Merge series from Uwe Kleine-König <u.kleine-koenig@pengutronix.de>:
this series goal is to change the spi remove callback's return value to void.
After numerous patches nearly all drivers already return 0 unconditionally.
The four first patches in this series convert the remaining three drivers to
return 0, the final patch changes the remove prototype and converts all
implementers.
base-commit: 26291c54e111ff6ba87a164d85d4a4e134b7315c
The value returned by an spi driver's remove function is mostly ignored.
(Only an error message is printed if the value is non-zero that the
error is ignored.)
So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour, all callbacks were prepared to
return 0 before.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Claudius Heine <ch@denx.de>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC
Acked-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Acked-by: Łukasz Stelmach <l.stelmach@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220123175201.34839-6-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This func misses checking for platform_get_irq()'s call and may passes the
negative error codes to request_threaded_irq(), which takes unsigned IRQ #,
causing it to fail with -EINVAL, overriding an original error code.
Stop calling request_threaded_irq() with invalid IRQ #s.
Fixes: 921fc1838fb0 ("spi: tegra210-quad: Add support for Tegra210 QSPI controller")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220128165956.27821-1-linmq006@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This func misses checking for platform_get_irq()'s call and may passes the
negative error codes to request_threaded_irq(), which takes unsigned IRQ #,
causing it to fail with -EINVAL, overriding an original error code.
Stop calling request_threaded_irq() with invalid IRQ #s.
Fixes: f333a331adfa ("spi/tegra114: add spi driver")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220128165238.25615-1-linmq006@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Reading from memory is 3x faster than bit-bang read operation. Also,
for tl-wr2543nd, the bit-bang read was sporadically returning random
data, possibly a HW defect, while fast-read works as expected.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20220129040453.8476-1-luizluca@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
A zero value for spi->max_speed_hz or spidev->speed_hz does not make
sense and trying to set that can lead to divide by zero crashes in
a some of the drivers.
drivers/spi/spi-s3c64xx.c:874 s3c64xx_spi_setup() error: potential divide by zero bug '/ spi->max_speed_hz'.
drivers/spi/spi-fsl-dspi.c:613 hz_to_spi_baud() error: potential divide by zero bug '/ speed_hz'.
drivers/spi/spi-xlp.c:146 xlp_spi_setup() error: potential divide by zero bug '/ (spi->max_speed_hz)'.
drivers/spi/spi-orion.c:162 orion_spi_baudrate_set() error: potential divide by zero bug '/ speed'.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220125065202.GA8807@kili
Signed-off-by: Mark Brown <broonie@kernel.org>
In zynq_qspi_exec_mem_op(), kzalloc() is directly used in memset(),
which could lead to a NULL pointer dereference on failure of
kzalloc().
Fix this bug by adding a check of tmpbuf.
This bug was found by a static analyzer. The analysis employs
differential checking to identify inconsistent security operations
(e.g., checks or kfrees) between two code paths and confirms that the
inconsistent operations are not recovered in the current function or
the callers, so they constitute bugs.
Note that, as a bug found by static analysis, it can be a false
positive or hard to trigger. Multiple researchers have cross-reviewed
the bug.
Builds with CONFIG_SPI_ZYNQ_QSPI=m show no new warnings,
and our static analyzer no longer warns about this code.
Fixes: 67dca5e580f1 ("spi: spi-mem: Add support for Zynq QSPI controller")
Signed-off-by: Zhou Qingyang <zhou1615@umn.edu>
Link: https://lore.kernel.org/r/20211130172253.203700-1-zhou1615@umn.edu
Signed-off-by: Mark Brown <broonie@kernel.org>
My patch created compilation bugs in the MPC512x-PSC driver.
Fix them up.
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: linuxppc-dev@lists.ozlabs.org
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 2818824ced4b (" spi: mpc512x-psc: Convert to use GPIO descriptors")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220201234535.569973-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Replace acpi_bus_get_device() that is going to be dropped with
acpi_fetch_acpi_dev().
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/2231987.ElGaqSPkdT@kreacher
Signed-off-by: Mark Brown <broonie@kernel.org>
There are quite a few fixes that have accumilated since the merge window
here, all driver specific and none super urgent, plus a new device ID
for the Rockchip driver.
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Merge tag 'spi-fix-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"There are quite a few fixes that have accumilated since the merge
window here, all driver specific and none super urgent, plus a new
device ID for the Rockchip driver"
* tag 'spi-fix-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: mediatek: Avoid NULL pointer crash in interrupt
spi: dt-bindings: Fix 'reg' child node schema
spi: bcm-qspi: check for valid cs before applying chip select
spi: uniphier: fix reference count leak in uniphier_spi_probe()
spi: meson-spicc: add IRQ check in meson_spicc_probe
spi: uniphier: Fix a bug that doesn't point to private data correctly
spi: change clk_disable_unprepare to clk_unprepare
spi: spi-rockchip: Add rk3568-spi compatible
spi: stm32: make SPI_MASTER_MUST_TX flags only specific to STM32F4
spi: stm32: remove inexistant variables in struct stm32_spi_cfg comment
spi: stm32-qspi: Update spi registering
