Some delay occurs between each bursts, thus the default delay is wrong
and a timeout will occur with big enough transfers.
The solution is to handle the timeout management in the driver and
add some delay for each bursts in the timeout calculation.
Reported-by: Da Xue <da@libre.computer>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20221026-spicc-burst-delay-v1-0-1be5ffb7051a@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Andy Shevchenko <andriy.shevchenko@linux.intel.com>:
Currently the SPI PXA2xx devices on Intel platforms can be instantiated
via the following paths:
1) as ACPI LPSS device on Haswell, Bay Trail and Cherry Trail;
2) as ACPI LPSS device on the Sky Lake and newer;
3) as PCI LPSS device on Haswell, Bay Trail and Cherry Trail;
4) as PCI LPSS device on the Sky Lake and newer;
5) as PCI device via ID table.
Each of these cases provides some platform related data differently,
i.e.:
1) via drivers/acpi/acpi_lpss.c and drivers/spi/spi-pxa2xx.c
2) via drivers/mfd/intel-lpss-acpi.c
3) via drivers/spi/spi-pxa2xx-pci.c
4) via drivers/mfd/intel-lpss-pci.c and drivers/spi/spi-pxa2xx.c
5) via drivers/spi/spi-pxa2xx-pci.c
This approach has two downsides:
a) there is no data propagated in the case #2 because we can't have
two or more drivers to match the same ACPI ID and hence some cases
are still not supported (Sky Lake and newer ACPI enabled LPSS);
b) the data is duplicated over two drivers in the cases #1 & #4 and,
besides to be a bloatware, it is error prone (e.g. Lakefield has
a wrong data right now due to missed PCI entry in the spi-pxa2xx.c).
This series fixes the downsides, and enables previously unsupported
cases.
There is no code that uses ID tables directly, except the
struct device_driver at the end of the file. Hence, move
tables closer to its user. It's always possible to access
them via pointer to a platform device.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20221021190018.63646-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Since the PCI enumerated devices provide a property with SSP type,
there is no more necessity to bear the copy of the ID table here.
Remove it for good.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221021190018.63646-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Allow to set the Intel SSP type by reading the property.
Only apply this to the known MFD enumerated LPSS devices.
The check is done by the looking for the specifically
named IO memory resource provided by upper layer. This
won't be an issue in the future because we strictly
prioritize the order in which we are looking for the SSP
type in the code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221021190018.63646-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Currently we blindly apply the SSP type value from any source of the
information. Increase robustness by validating the value before use.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221021190018.63646-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use the devm_platform_{get_and_}ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221019092635.1176622-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The original fix "spi: stm32: Rate-limit the 'Communication suspended' message"
still leads to "stm32h7_spi_irq_thread: 1696 callbacks suppressed" spew in the
kernel log. Since this 'Communication suspended' message is a debug print, add
RATELIMIT_MSG_ON_RELEASE flag to inhibit the "callbacks suspended" part during
normal operation and only print summary at the end.
Fixes: ea8be08cc9 ("spi: stm32: Rate-limit the 'Communication suspended' message")
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20221018183513.206706-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Amjad Ouled-Ameur <aouledameur@baylibre.com>:
Between SPI transactions, all SPI pins are in HiZ state. When using the SS
signal from the SPICC controller it's not an issue because when the
transaction resumes all pins come back to the right state at the same time
as SS.
The problem is when we use CS as a GPIO. In fact, between the GPIO CS
state change and SPI pins state change from idle, you can have a missing or
spurious clock transition.
Set a bias on the clock depending on the clock polarity requested before CS
goes active, by passing a special "idle-low" and "idle-high" pinctrl state
and setting the right state at a start of a message.
Between SPI transactions, all SPI pins are in HiZ state. When using the SS
signal from the SPICC controller it's not an issue because when the
transaction resumes all pins come back to the right state at the same time
as SS.
The problem is when we use CS as a GPIO. In fact, between the GPIO CS
state change and SPI pins state change from idle, you can have a missing or
spurious clock transition.
Set a bias on the clock depending on the clock polarity requested before CS
goes active, by passing a special "idle-low" and "idle-high" pinctrl state
and setting the right state at a start of a message
Reported-by: Da Xue <da@libre.computer>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
Link: https://lore.kernel.org/r/20221004-up-aml-fix-spi-v4-2-0342d8e10c49@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
In commit 7a908832ac ("spi: imx: add fallback feature") the last
user of the struct spi_imx_devtype_data::disable_dma callback was
removed. However the disable_dma member of struct spi_imx_devtype_data
and the callback itself was not removed.
Remove struct spi_imx_devtype_data::disable_dma and mx51_disable_dma()
as they are unused.
Cc: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20221021131051.1777984-1-mkl@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Cleaning up the driver to use pm_ptr() macro instead of ifdeffery
that makes it simpler and allows the compiler to remove those functions
if built without CONFIG_PM and CONFIG_PM_SLEEP support.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20221020194500.10225-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The proposed spi_get_device_match_data() helper is for retrieving
a driver data associated with the ID in an ID table. First, it tries
to get driver data of the device enumerated by firmware interface
(usually Device Tree or ACPI). If none is found it falls back to
the SPI ID table matching.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221020195421.10482-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>:
A bunch of improvements to the driver:
- Fix kernel-doc warnings in GQSPI driver.
- Avoid setting CPOL, CPHA & baud rate multiple times.
- Add Versal platform support in GQSPI driver.
- Add tap delay support in GQSPI driver.
Use the devm_platform_get_and_ioremap_resource() helper instead of calling
platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221019093318.1183190-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The offset value of the mapping window in the kernel structure is
calculated using the value of the previous window offset. This doesn't
reflect how the HW is configured and can lead to erroneous setting of
the second flash device (CE1).
Cc: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
Fixes: e3228ed928 ("spi: spi-mem: Convert Aspeed SMC driver to spi-mem")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20221016155722.3520802-1-clg@kaod.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Add tap delay support for GQSPI controller on Versal platform.
Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20221011062040.12116-8-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
GQSPI controller uses the internal clock for loopback mode. The loopback
mode is used with the high-speed Quad SPI timing mode, where the memory
interface clock needs to be greater than 40 MHz. Based on the tap delay
value programmed, the internal clock is delayed and used for capturing
the data.
Based upon the frequency of operation set the recommended tap delay
values in GQSPI driver.
Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20221011062040.12116-6-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
During every transfer the GQSPI driver configures the baud rate value. But
when there is no change in the SPI clock frequency the driver should avoid
rewriting the same baud rate value to the configuration register. Update
GQSPI driver to rewrite the baud rate value if there is any change in SPI
clock frequency.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20221011062040.12116-4-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
During every transfer GQSPI driver writes the CPOL & CPHA values to the
configuration register. But the CPOL & CPHA values do not change in between
multiple transfers, so moved the CPOL & CPHA initialization to hardware
init so that the values are written only once.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20221011062040.12116-3-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Document zynqmp_qspi ctrl and op_lock member description. It also adds
return documentation for 'zynqmp_qspi_setuprxdma' and zynqmp_qspi_read_op.
Fixes below kernel-doc warnings-
spi-zynqmp-gqspi.c:178: warning: Function parameter or member 'ctlr' not
described in 'zynqmp_qspi'
spi-zynqmp-gqspi.c:178: warning: Function parameter or member 'op_lock'
not described in 'zynqmp_qspi'
spi-zynqmp-gqspi.c:737: warning: No description found for return value of
'zynqmp_qspi_setuprxdma'
spi-zynqmp-gqspi.c:822: warning: No description found for return value of
'zynqmp_qspi_read_op'
Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://lore.kernel.org/r/20221011062040.12116-2-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Not all zero page implementations use empty_zero_page global pointer so
let's substitute empty_zero_page occurence with helper ZERO_PAGE(0).
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Link: https://lore.kernel.org/r/20221018215755.33566-2-giulio.benetti@benettiengineering.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The function bcm_qspi_remove() returns zero unconditionally. Make it
return void.
This is a preparation for making platform remove callbacks return void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20221017200143.1426528-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Convert platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.
No functional changes.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221017171243.57078-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use the devm_platform_{get_and}_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220928145852.1882221-2-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use the devm_platform_get_and_ioremap_resource() helper instead of calling
platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220928145852.1882221-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Microchip pci1xxxx is a PCIe switch with a multi-function endpoint on one of its
downstream ports. SPI is one of the functions in the multi-function endpoint. This
function has 2 SPI masters, operates at a maximum frequency of 30 MHz and supports
7 client devices per master. This patch adds complete functionality to the SPI
function except for suspend and resume.
Signed-off-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com>
Link: https://lore.kernel.org/r/20221006050514.115564-2-tharunkumar.pasumarthi@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The function mchp_corespi_enable() is defined in the spi-microchip-core.c
file, but not called elsewhere, so delete this unused function.
drivers/spi/spi-microchip-core.c:122:20: warning: unused function 'mchp_corespi_enable'.
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2418
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20221017092141.9789-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Most of the device with QUP SPI adapter are actually using GPIO-s for
chip select.
However, this stopped working after ("spi: Retire legacy GPIO handling")
as it introduced a check on ->use_gpio_descriptors flag and since spi-qup
driver does not set the flag it meant that all of boards using GPIO-s and
with QUP adapter SPI devices stopped working.
So, to enable using GPIO-s again set ->use_gpio_descriptors to true and
populate ->max_native_cs.
Fixes: f48dc6b966 ("spi: Retire legacy GPIO handling")
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: luka.perkov@sartura.hr
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221006194819.1536932-1-robert.marko@sartura.hr
Signed-off-by: Mark Brown <broonie@kernel.org>
According to documentation, the 64K erase opcode is located in VSCC
range [16:23] instead of [8:15].
Use the proper value to shift the mask over the correct range.
Signed-off-by: Mauro Lima <mauro.lima@eclypsium.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20221012152135.28353-1-mauro.lima@eclypsium.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Both quad SPI TX and RX modes can be supported on AST2600.
Correct typo in mode_bits field in both ast2600_fmc_data
and ast2600_spi_data structs.
Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Link: https://lore.kernel.org/r/20221005083209.222272-1-chin-ting_kuo@aspeedtech.com
Signed-off-by: Mark Brown <broonie@kernel.org>
NO_IRQ is used to check the return of irq_of_parse_and_map().
On some architecture NO_IRQ is 0, on other architectures it is -1.
irq_of_parse_and_map() returns 0 on error, independent of NO_IRQ.
So use 0 instead of using NO_IRQ.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/f41e09d710879726eacb98daedf16d0847303b9b.1665034444.git.christophe.leroy@csgroup.eu
Signed-off-by: Mark Brown <broonie@kernel.org>
With the exception of some refactoring to fix long standing issues
where we weren't handling cache syncs properly for messages which had
PIO and DMA transfers going to the same page correctly there has been o
work on the core this time around, and it's also been quite a quiet
release for the drivers too:
- Fix cache syncs for cases where we have DMA and PIO transfers in the
same message going to the same page.
- Update the fsl_spi driver to use transfer_one() rather than a custom
transfer function.
- Support for configuring transfer speeds with the AMD SPI controller.
- Support for a second chip select and 64K erase on Intel SPI.
- Support for Microchip coreQSPI, Nuvoton NPCM845, NXP i.MX93, and
Rockchip RK3128 and RK3588.
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmM62YIACgkQJNaLcl1U
h9CvPAf+MF1AzJJWH9DkR846KQh7Zt1rrujRuj5SGwvHewqjJcDtDmipAbM7mRFa
VPk6fCzfRE4btVywCDMEQX2ToB9VKBNUeP8ihVLddWrTddbkQ7hOKlTrz31dJ+6W
F9kwXkWcqWEpMYD/wr/25eT/kkNfv27oCyPU4dRQKoGGeF+zb9jYoj0+gPDl9Om8
ok7D1XAwY1wOqYqdPfl2thcUrBfoKtFvkTj+NNhqwuzWwIqfQHM2skwAjmD3fliQ
lLdRc54erCOqukDddIoWr348TyJIT4v1IXnkqY3cd7da6+kpixWae73o/7WIcQUR
4MrtPply0WWcapgU/46sCbHpjJNjjg==
=PDCv
-----END PGP SIGNATURE-----
Merge tag 'spi-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"With the exception of some refactoring to fix long standing issues
where we weren't handling cache syncs properly for messages which had
PIO and DMA transfers going to the same page correctly there has been
no work on the core this time around, and it's also been quite a quiet
release for the drivers too:
- Fix cache syncs for cases where we have DMA and PIO transfers in
the same message going to the same page
- Update the fsl_spi driver to use transfer_one() rather than a
custom transfer function
- Support for configuring transfer speeds with the AMD SPI controller
- Support for a second chip select and 64K erase on Intel SPI
- Support for Microchip coreQSPI, Nuvoton NPCM845, NXP i.MX93, and
Rockchip RK3128 and RK3588"
* tag 'spi-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (73 commits)
spi: Ensure that sg_table won't be used after being freed
spi: spi-gxp: Use devm_platform_ioremap_resource()
spi: s3c64xx: Fix large transfers with DMA
spi: Split transfers larger than max size
spi: Fix cache corruption due to DMA/PIO overlap
spi: Save current RX and TX DMA devices
spi: mt65xx: Add dma max segment size declaration
spi: migrate mt7621 text bindings to YAML
spi: renesas,sh-msiof: Add r8a779g0 support
spi: spi-fsl-qspi: Use devm_platform_ioremap_resource_byname()
spi: spi-fsl-lpspi: Use devm_platform_get_and_ioremap_resource()
spi: spi-fsl-dspi: Use devm_platform_get_and_ioremap_resource()
spi/omap100k:Fix PM disable depth imbalance in omap1_spi100k_probe
spi: dw: Fix PM disable depth imbalance in dw_spi_bt1_probe
spi: cadence-quadspi: Fix PM disable depth imbalance in cqspi_probe
spi: s3c24xx: Switch to use devm_spi_alloc_master()
spi: xilinx: Switch to use devm_spi_alloc_master()
spi: img-spfi: using pm_runtime_resume_and_get instead of pm_runtime_get_sync
spi: aspeed: Remove redundant dev_err call
spi: spi-mpc52xx: switch to using gpiod API
...
Merge ACPI _UID handling unification changes for 6.1-rc1:
- Introduce acpi_dev_uid_to_integer() to convert a _UID string into an
integer value (Andy Shevchenko).
- Use acpi_dev_uid_to_integer() in several places to unify _UID
handling (Andy Shevchenko).
* acpi-uid:
efi/dev-path-parser: Refactor _UID handling to use acpi_dev_uid_to_integer()
spi: pxa2xx: Refactor _UID handling to use acpi_dev_uid_to_integer()
perf: qcom_l2_pmu: Refactor _UID handling to use acpi_dev_uid_to_integer()
i2c: mlxbf: Refactor _UID handling to use acpi_dev_uid_to_integer()
i2c: amd-mp2-plat: Refactor _UID handling to use acpi_dev_uid_to_integer()
ACPI: x86: Refactor _UID handling to use acpi_dev_uid_to_integer()
ACPI: LPSS: Refactor _UID handling to use acpi_dev_uid_to_integer()
ACPI: utils: Add acpi_dev_uid_to_integer() helper to get _UID as integer
Return value should be updated to zero in combined sequence routine
if transfer is completed successfully. Currently it holds timeout value
resulting in errors.
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/20221001122148.9158-1-kyarlagadda@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge changes regarding the management of ACPI device objects for
6.1-rc1:
- Rename ACPI device object reference counting functions (Rafael
Wysocki).
- Rearrange ACPI device object initialization code (Rafael Wysocki).
- Drop parent field from struct acpi_device (Rafael Wysocki).
- Extend the the int3472-tps68470 driver to support multiple consumers
of a single TPS68470 along with the requisite framework-level
support (Daniel Scally).
* acpi-dev:
platform/x86: int3472: Add board data for Surface Go2 IR camera
platform/x86: int3472: Support multiple gpio lookups in board data
platform/x86: int3472: Support multiple clock consumers
ACPI: bus: Add iterator for dependent devices
ACPI: scan: Add acpi_dev_get_next_consumer_dev()
ACPI: property: Use acpi_dev_parent()
ACPI: Drop redundant acpi_dev_parent() header
ACPI: PM: Fix NULL argument handling in acpi_device_get/set_power()
ACPI: Drop parent field from struct acpi_device
ACPI: scan: Eliminate __acpi_device_add()
ACPI: scan: Rearrange initialization of ACPI device objects
ACPI: scan: Rename acpi_bus_get_parent() and rearrange it
ACPI: Rename acpi_bus_get/put_acpi_device()
SPI code checks for non-zero sgt->orig_nents to determine if the buffer
has been DMA-mapped. Ensure that sg_table is really zeroed after free to
avoid potential NULL pointer dereference if the given SPI xfer object is
reused again without being DMA-mapped.
Fixes: 0c17ba73c0 ("spi: Fix cache corruption due to DMA/PIO overlap")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20220930113408.19720-1-m.szyprowski@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use the devm_platform_ioremap_resource() helper instead of calling
platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220928145256.1879256-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The COUNT_VALUE in the PACKET_CNT register is 16-bit so the maximum
value is 65535. Asking the driver to transfer a larger size currently
leads to the DMA transfer timing out. Implement ->max_transfer_size()
and have the core split the transfer as needed.
Fixes: 230d42d422 ("spi: Add s3c64xx SPI Controller driver")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220927112117.77599-5-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
A couple of drivers call spi_split_transfers_maxsize() from their
->prepare_message() callbacks to split transfers which are too big for
them to handle. Add support in the core to do this based on
->max_transfer_size() to avoid code duplication.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220927112117.77599-4-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The SPI core DMA mapping support performs cache management once for the
entire message and not between transfers, and this leads to cache
corruption if a message has two or more RX transfers with both
transfers targeting the same cache line, and the controller driver
decides to handle one using DMA and the other using PIO (for example,
because one is much larger than the other).
Fix it by syncing before/after the actual transfers. This also means
that we can skip the sync during the map/unmap of the message.
Fixes: 99adef310f ("spi: Provide core support for DMA mapping transfers")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220927112117.77599-3-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Save the current RX and TX DMA devices to avoid having to duplicate the
logic to pick them, since we'll need access to them in some more
functions to fix a bug in the cache handling.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220927112117.77599-2-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add spi dma max segment size declaration according to spi
hardware capability, instead of 64KB by system default
setting, to improve bus bandwidth for mass data transmission.
Signed-off-by: zhichao.liu <zhichao.liu@mediatek.com>
Link: https://lore.kernel.org/r/20220927083248.25404-1-zhichao.liu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Zhang Qilong <zhangqilong3@huawei.com>:
The pm_runtime_enable will increase power disable depth. Thus
a pairing decrement is needed when error returns to keep it
balanced. This series of patches fixed it in spi probe.
Use the devm_platform_ioremap_resource_byname() helper instead of
calling platform_get_resource_byname() and devm_ioremap_resource()
separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220924131854.964923-3-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use the devm_platform_get_and_ioremap_resource() helper instead of calling
platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220924131854.964923-2-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use the devm_platform_get_and_ioremap_resource() helper instead of calling
platform_get_resource() and devm_ioremap_resource() separately.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220924131854.964923-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The pm_runtime_enable will increase power disable depth. Thus
a pairing decrement is needed on the error handling path to
keep it balanced according to context.
Fixes:db91841b58f9a ("spi/omap100k: Convert to runtime PM")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220924121310.78331-4-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The pm_runtime_enable will increase power disable depth. Thus
a pairing decrement is needed on the error handling path to
keep it balanced according to context.
Fixes:abf00907538e2 ("spi: dw: Add Baikal-T1 SPI Controller glue driver")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220924121310.78331-3-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The pm_runtime_enable will increase power disable depth. Thus
a pairing decrement is needed on the error handling path to
keep it balanced according to context.
Fixes:73d5fe0462702 ("spi: cadence-quadspi: Remove spi_master_put() in probe failure path")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220924121310.78331-2-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Switch to use devm_spi_alloc_master() to simpify error path.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220920142216.3002291-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
devm_ioremap_resource() prints error message in itself. Remove the
dev_err call to avoid redundant error message.
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Link: https://lore.kernel.org/r/20220923101632.19170-1-shangxiaojing@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This switches the driver to use gpiod API instead of legacy gpio API,
which will brings us close to removing of_get_gpio() and other
OF-specific old APIs.
No functional change intended beyond some differences in error messages.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/Yy07WbMAG4bPgYNd@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>
devm_ioremap_resource() prints error message in itself. Remove the
dev_err call to avoid redundant error message.
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Link: https://lore.kernel.org/r/20220923101726.19420-1-shangxiaojing@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Switch to use devm_spi_alloc_master() to simpify error path.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Link: https://lore.kernel.org/r/20220920114448.2681053-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The sparse tool complains as follows:
drivers/spi/spi-meson-spicc.c:570:22: warning:
symbol 'meson_spicc_pow2_clk_ops' was not declared. Should it be static?
This symbol is not used outside of spi-meson-spicc.c, so marks it static.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20220922040807.1409540-1-weiyongjun@huaweicloud.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This condition was accidentally changed from "if (status < 0)" to
"if (status)". The platform_get_irq() function returns non-zero
positive values on success so, unfortunately, the driver could not be
used. Change the condition back to how it was.
Fixes: f4ca8c88c2 ("spi: omap2-mcspi: Switch to use dev_err_probe() helper")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/Yyq8Q/kd301wVzg8@kili
Signed-off-by: Mark Brown <broonie@kernel.org>
ACPI utils provide acpi_dev_uid_to_integer() helper to extract _UID as
an integer. Use it instead of custom approach.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add a test where a small and a large transfer in a message hit the same
cache line. This test currently fails on spi-s3c64xx on in DMA mode
since it ends up mixing DMA and PIO without proper cache maintenance.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220916113951.228398-2-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
In the probe path, dev_err() can be replace with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220917122504.1896302-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Let the core handle all the chipselect bakery and replace
transfer_one_message() by transfer_one() and prepare_message().
At the time being, there is fsl_spi_cs_control() to handle
chipselects. That function handles both GPIO and non-GPIO
chipselects. The GPIO chipselects will now be handled by
the core directly, so only handle non-GPIO chipselects and
hook it to ->set_cs
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/753266abafe81722d86c3ddb8bac8ef1cb00fe8c.1660829841.git.christophe.leroy@csgroup.eu
Signed-off-by: Mark Brown <broonie@kernel.org>
Several fixes that came in since the merge window, the major one being a
fix for the spi-mux driver which was broken by the performance
optimisations due to it peering inside the core's data structures more
than it should.
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmMZ22MACgkQJNaLcl1U
h9BV9Af/fvJZTo35a2NBZ6kUw/V+73LSxfEfzfzjqfXhYTTiYshDTvRi7MK+FdrU
E84vuidJkmP1+NVRbyoiBbDhx9Ejq11tHL8rpCm/0PTrSd3jc2WMs9ODGG0XIXst
j3Q7WnaWOfvvETSDVw8jNs8B9zdMMXsluaTJUIn1hjQWSVYTt67hsqtwRjrRlwmI
xLjVcYygnsiggNetAKCqmamPG9W94v6aUlhQ7c7aiAqYwQgy94sCBye+T4pV64rK
mF28RkdDx6U9TA08uSepmwgUC9PEWyCIsVSoJs0DuKXZH9WQ/ixsFDubC8WodIKT
/IgtX+Xpf6bES6n8fi3tidd7HkXrqw==
=ZJei
-----END PGP SIGNATURE-----
Merge tag 'spi-fix-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"Several fixes that came in since the merge window, the major one being
a fix for the spi-mux driver which was broken by the performance
optimisations due to it peering inside the core's data structures more
than it should"
* tag 'spi-fix-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: spi: Fix queue hang if previous transfer failed
spi: mux: Fix mux interaction with fast path optimisations
spi: cadence-quadspi: Disable irqs during indirect reads
spi: bitbang: Fix lsb-first Rx
Since [1], controller's busy flag isn't set anymore when the
__spi_transfer_message_noqueue() is used instead of the
__spi_pump_transfer_message() logic for spi_sync transfers.
Since the pow2 clock ops were limited to only be available when a
transfer is ongoing (between prepare_transfer_hardware and
unprepare_transfer_hardware callbacks), the only way to track this
down is to check for the controller cur_msg.
[1] ae7d2346dc ("spi: Don't use the message queue if possible in spi_sync")
Fixes: 09992025da ("spi: meson-spicc: add local pow2 clock ops to preserve rate between messages")
Fixes: ae7d2346dc ("spi: Don't use the message queue if possible in spi_sync")
Reported-by: Markus Schneider-Pargmann <msp@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Markus Schneider-Pargmann <msp@baylibre.com>
Link: https://lore.kernel.org/r/20220908121803.919943-1-narmstrong@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Return the value pm_runtime_force_suspend() directly instead of storing
it in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/20220908010429.342875-1-ye.xingchen@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Some components require a few clock cycles with chipselect off before
or/and after the data transfer done with CS on.
Typically IDT 801034 QUAD PCM CODEC datasheet states "Note *: CCLK
should have one cycle before CS goes low, and two cycles after
CS goes high".
The cycles "before" are implicitely provided by all previous activity
on the SPI bus. But the cycles "after" must be provided in order to
terminate the SPI transfer.
In order to use that kind of component, add a cs_off flag to
spi_transfer struct. When this flag is set, the transfer is performed
with chipselect off. This allows consummer to add a dummy transfer
at the end of the transfer list which is performed with chipselect
OFF, providing the required additional clock cycles.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/434165c46f06d802690208a11e7ea2500e8da4c7.1662558898.git.christophe.leroy@csgroup.eu
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/20220906161048.39953-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add the missing clk_disable_unprepare() before return
from spi_qup_pm_resume_runtime() in the error handling case.
Fixes: dae1a7700b (“spi: qup: Handle clocks in pm_runtime suspend and resume”)
Signed-off-by: Xu Qiang <xuqiang36@huawei.com>
Link: https://lore.kernel.org/r/20220825065324.68446-2-xuqiang36@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add the missing clk_disable_unprepare() before return
from spi_qup_resume() in the error handling case.
Fixes: 64ff247a97 (“spi: Add Qualcomm QUP SPI controller support”)
Signed-off-by: Xu Qiang <xuqiang36@huawei.com>
Link: https://lore.kernel.org/r/20220825065324.68446-1-xuqiang36@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The queue worker always needs to be kicked one final time after a transfer
is done in order to transition to idle (ctlr->busy = false).
Commit 69fa95905d ("spi: Ensure the io_mutex is held until
spi_finalize_current_message()") moved this code into
__spi_pump_messages(), but it was executed only if the transfer was
successful. This condition check causes ctlr-busy to stay true in case of
a failed transfer.
This in turn causes that no new work is ever scheduled to the work queue.
Fixes: 69fa95905d ("spi: Ensure the io_mutex is held until spi_finalize_current_message()")
Reported-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: David Jander <david@protonic.nl>
Link: https://lore.kernel.org/r/20220901123630.1098433-1-david@protonic.nl
Signed-off-by: Mark Brown <broonie@kernel.org>
The spi-mux driver is rather too clever and attempts to resubmit any
message that is submitted to it to the parent controller with some
adjusted callbacks. This does not play at all nicely with the fast
path which now sets flags on the message indicating that it's being
handled through the fast path, we see async messages flagged as being on
the fast path. Ideally the spi-mux code would duplicate the message but
that's rather invasive and a bit fragile in that it relies on the mux
knowing which fields in the message to copy. Instead teach the core
that there are controllers which can't cope with the fast path and have
the mux flag itself as being such a controller, ensuring that messages
going via the mux don't get partially handled via the fast path.
This will reduce the performance of any spi-mux connected device since
we'll now always use the thread for both the actual controller and the
mux controller instead of just the actual controller but given that we
were always hitting the slow path anyway it's hopefully not too much of
an additional cost and it allows us to keep the fast path.
Fixes: ae7d2346dc ("spi: Don't use the message queue if possible in spi_sync")
Reported-by: Casper Andersson <casper.casan@gmail.com>
Tested-by: Casper Andersson <casper.casan@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220901120732.49245-1-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
gpiod_count() either returns positive number of the CS or negative
error code. In the stm32_qspi_setup() we check that configuration
has enough CS for the dual flash mode and SPI mode is not changing
over the lines of the code. Taking all above into considertion,
refactor dual flash mode enable check by dropping unneeded CS check
and reusing local mode variable.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220830182821.47919-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
As a preparation to unexport of_gpio_named_count(), convert the
driver to use gpiod_count() instead.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220830182821.47919-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
If the current speed is equal to the requested speed by the device
then return success.
This patch fixes a bug introduced by the commit 3fe26121dc
("spi: amd: Configure device speed") which checks speed_hz instead
of amd_spi->speed_hz.
Fixes: 3fe26121dc ("spi: amd: Configure device speed")
Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com>
Link: https://lore.kernel.org/r/20220830093607.45484-1-shreeya.patel@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Christophe JAILLET <christophe.jaillet@wanadoo.fr>:
Patch 1 fixes an issue about an error code that is erroneously logged.
Patch 2-4 are just clean-ups spotted while fixing it.
Additional comments are added below --- in patches 2 and 3.
Now that clk_disable_unprepare(clk) is handled with a managed resource,
we can use devm_spi_register_controller() and axe the .remove function.
The order between spi_unregister_controller() and clk_disable_unprepare()
is still the same.
(see commit 46b5c4fb87 ("spi: mt7621: Don't leak SPI master in probe
error path") to see why it matters)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/b7698e198acc998d99e7e7c895a2910f14f89443.1661599671.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
The devm_clk_get_enabled() helper:
- calls devm_clk_get()
- calls clk_prepare_enable() and registers what is needed in order to
call clk_disable_unprepare() when needed, as a managed resource.
This helper is well suited for cases where the clock would be kept
prepared or enabled for the whole lifetime of the driver.
This simplifies the error handling a lot.
The order between spi_unregister_controller() (in the remove function) and
the clk_disable_unprepare() (now handle by a managed resource) is kept
the same.
(see commit 46b5c4fb87 ("spi: mt7621: Don't leak SPI master in probe
error path") to see why it matters)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/05a7fd22719008c8a905d6328aa9548ce40f2a7a.1661599671.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
'status' is known to be 0 at this point. The expected error code is
PTR_ERR(clk).
Switch to dev_err_probe() in order to display the expected error code (in a
human readable way).
This also filters -EPROBE_DEFER cases, should it happen.
Fixes: 1ab7f2a435 ("staging: mt7621-spi: add mt7621 support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/928f3fb507d53ba0774df27cea0bbba4b055993b.1661599671.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Wolfram Sang <wsa+renesas@sang-engineering.com>:
Here are the patches to enable MSIOF on R-Car S4-8. They also introduce
generic Gen4 support and move V3U to Gen4 (which it really is).
ctrl->auto_runtime_pm was wrongly set to true when adding
transfer_one_message() callback.
As explained in commit 6e6ccb3d4cdc ("spi: stm32-qspi: Add pm_runtime support")
the expected behavior is to prevent runtime suspends between each transfer.
Add needed pm_runtime API calls in stm32_qspi_transfer_one_message().
Fixes: a557fca630 ("spi: stm32_qspi: Add transfer_one_message() spi callback")
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220829123250.2170562-1-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The patch a557fca630: "spi: stm32_qspi: Add transfer_one_message()
spi callback" from Aug 23, 2022, leads to the following Smatch static
checker warning:
drivers/spi/spi-stm32-qspi.c:627 stm32_qspi_transfer_one_message()
error: uninitialized symbol 'ret'.Fix the following Smatch static checker warning:
Fixes: a557fca630 ("spi: stm32_qspi: Add transfer_one_message() spi callback")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220826092031.1393430-1-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Number of clock frequencies are supported by AMD controller
which are mentioned in the amd_spi_freq structure table.
Create mechanism to configure device clock frequency such
that it is strictly less than the requested frequency.
Give priority to the device transfer speed and in case
it is not set then use the max clock speed supported
by the device.
Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Co-developed-by: Shreeya Patel <shreeya.patel@collabora.com>
Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com>
Link: https://lore.kernel.org/r/20220825143132.253224-1-shreeya.patel@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Return the value clk_prepare_enable() directly instead of storing it in
another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/20220825072828.229294-1-ye.xingchen@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
The parent field in struct acpi_device is, in fact, redundant,
because the dev.parent field in it effectively points to the same
object and it is used by the driver core.
Accordingly, the parent field can be dropped from struct acpi_device
and for this purpose define acpi_dev_parent() to retrieve a parent
struct acpi_device pointer from the dev.parent field in struct
acpi_device. Next, update all of the users of the parent field
in struct acpi_device to use acpi_dev_parent() instead of it and
drop it.
While at it, drop the ACPI_IS_ROOT_DEVICE() macro that is only used
in one place in a confusing way.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Punit Agrawal <punit.agrawal@bytedance.com>
Merge series from patrice.chotard@foss.st.com <patrice.chotard@foss.st.com>:
The goal of this series is to allow to use QSPI bus as a 8 lines communication
channel for specific purpose.
The QSPI block offers the possibility to communicate with 2 flashes in
parrallel using the dual flash mode, 8 data lines are then used.
Usage of cs-gpios populated and spi-tx-bus-width / spi-rx-bus-width both set to 8,
is needed to enable dual flash mode.
The addition of the legacy transfer_one_message() spi callback is also needed
as currently the stm32-qspi driver only supports spi_controller_mem_ops API.
It's pretty possible to have the spi_register_controller() method
returning -EPROBE_DEFER status in case, for instance, if the GPIOs used
for the CS implementation aren't ready to be requested due to the
corresponding platform devices still pending to be probed. Let's make sure
the DW SSI driver won't print error message in that case by calling the
dev_err_probe() function if the SPI-registration procedure exited with
a non-zero status.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220822181853.23063-1-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
Add transfer_one_message() spi callback in order to use the QSPI interface
as a communication channel using up to 8 qspi lines (QSPI configured
in dual flash mode).
To enable this mode, both spi-rx-bus-width and spi-tx-bus-width must be
set to 8 and cs-qpios must be populated.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220823075850.575043-3-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The hardware sequencer in Intel Canon Lake and beyond supports also 64k
erase command. The SPI-NOR core uses SFDP (Serial Flash Discovery
Parameter) to figure out what the chip actually supports and only issues
64k erase if it is supported.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20220816125537.89389-1-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Intel SPI flash controller has been supporting two chip selects long
time already even if the most common configuration is to have a single
flash chip for the BIOS and related data. This adds support for the
second chip select if we find out that there are two flash components
(this information is available in the mandatory flash descriptor on the
first chip). The second chip is exposed as is without any partition
information.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20220816130818.89600-1-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
On architecture where reading the SRAM is slower than the pace at
controller fills it, with interrupt enabled while reading from
SRAM FIFO causes unwanted interrupt storm to CPU.
The inner "bytes to read" loop never exits and waits for the completion
so it is enough to only enable the watermark interrupt when we
are out of bytes to read, which only happens when we start the
transfer (waiting for the FIFO to fill up initially) if the SRAM
is slow.
So only using read watermark interrupt, as the current implementation
doesn't utilize the SRAM full and indirect complete read interrupt.
And disable all the read interrupts while reading from SRAM.
Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@intel.com>
Link: https://lore.kernel.org/r/20220813042616.1372110-1-niravkumar.l.rabara@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The AMD SPI controller hardware seems to expect the FIFO buffer to be
fully setup with the details of all transfers in the SPI message before
it is able to start processing the data in a reliable way.
Furthermore, it imposes a strict ordering restriction, in the sense that
all TX transfers must be handled prior any RX transfer.
Hence, let's ensure amd_spi_execute_opcode() is called only once, after
all TX transfers have been setup, and process any remaining RX transfers
afterwards, in a second iteration.
Additionally, get rid of the unnecessary AMD_SPI_XFER_TX/RX defines and
improve error handling.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20220818010059.403776-1-cristian.ciocaltea@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
