BITS_TO_BYTES() is the existing macro which takes care about full
bytes that may fully hold the given amount of bits. Use it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230714091748.89681-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Now, spi_add_device_locked() has just a line on top of __spi_add_device().
Besides that, it has a single caller. So, just kill it and embed its parts
into the caller.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230714091748.89681-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The commit 0c79378c01 ("spi: add ancillary device support")
added a dozen of duplicating lines of code. We may move them
to the __spi_add_device(). Note, that the code may be called
under the mutex.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230714091748.89681-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Andy Shevchenko <andriy.shevchenko@linux.intel.com>:
Various cleanups and refactorings of the SPI header and core parts
united in a single series. It also touches drivers under SPI subsystem
folder on the pure renaming purposes of some constants.
No functional change intended.
Merge series from Maksim Kiselev <bigunclemax@gmail.com>:
This series extends the previous https://lore.kernel.org/all/20230510081121.3463710-1-bigunclemax@gmail.com
And adds support for Dual and Quad SPI modes for the listed SoCs.
Both modes have been tested on the T113s and should work on
other Allwinner's SoCs that have a similar SPI conttoller.
It may also work for previous SoCs that support Dual/Quad modes.
One of them are H6 and H616.
Rename SPI_MASTER_GPIO_SS to SPI_CONTROLLER_GPIO_SS and
convert the users to SPI_CONTROLLER_GPIO_SS to follow
the new naming shema.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-14-andriy.shevchenko@linux.intel.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Convert the users from SPI_MASTER_MUST_TX and/or SPI_MASTER_MUST_RX
to SPI_CONTROLLER_MUST_TX and/or SPI_CONTROLLER_MUST_RX respectively
and kill the not used anymore definitions.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-13-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Convert the users from SPI_MASTER_NO_TX and/or SPI_MASTER_NO_RX
to SPI_CONTROLLER_NO_TX and/or SPI_CONTROLLER_NO_RX respectively
and kill the not used anymore definitions.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-12-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-7-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Instead of if-else-if, simply call roundup_pow_of_two(BITS_PER_BYTES()).
Note, there is no division assumed as compiler may optimize it away.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Refactor spi_register_controller() to drop duplicate IDR allocation.
Instead of if-else-if branching use two sequential if:s, which allows
to re-use the logic of IDR allocation in all cases.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
In the couple of places the NULL check of OF node is implied by the call
that takes it as a parameter. Drop the respective duplicate checks.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-2-andriy.shevchenko@linux.intel.com
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.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230706032727.9180-7-frank.li@vivo.com
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.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20230706032727.9180-6-frank.li@vivo.com
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.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230706032727.9180-5-frank.li@vivo.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use devm_platform_ioremap_resource() and
devm_platform_ioremap_resource_byname() to simplify code.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/20230706032727.9180-4-frank.li@vivo.com
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.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230706032727.9180-3-frank.li@vivo.com
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.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230706032727.9180-2-frank.li@vivo.com
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.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230706032727.9180-1-frank.li@vivo.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new() which already returns void. Eventually after all drivers
are converted, .remove_new() is renamed to .remove().
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230707071119.3394198-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
IMX51 supports 4096 bit burst lengths. Using the spi transfer length
instead of bits_per_word increases performance significantly.
Signed-off-by: Stefan Moring <stefan.moring@technolution.nl>
Link: https://lore.kernel.org/r/20230628125406.237949-1-stefan.moring@technolution.nl
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch sets the clock rate (spi_transfer->max_speed_hz) from the
amlogic_spifc_a1_exec_op().
Signed-off-by: Martin Kurbanov <mmkurbanov@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230706110331.19794-3-mmkurbanov@sberdevices.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
This enhancement eliminates the need for a loop in the
amlogic_spifc_a1_exec_op() function and allows the SPI core to
dynamically divide transactions into appropriately sized chunks.
Signed-off-by: Martin Kurbanov <mmkurbanov@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230706110331.19794-2-mmkurbanov@sberdevices.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
Listed SoCs have SPI controllers that can operate in dual or quad modes.
This patch adds dual/quad mode bits for spi_master on these SoCS.
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Link: https://lore.kernel.org/r/20230624131632.2972546-3-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
New Allwinner's SPI controllers can support dual and quad SPI modes.
To enable one of these modes, we should set the corresponding bit in
the SUN6I_BURST_CTL_CNT_REG register. DRM (28 bits) for dual mode and
Quad_EN (29 bits) for quad transmission.
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Link: https://lore.kernel.org/r/20230624131632.2972546-2-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
A few mostly minor fixes that came in during the merge window, plus one
administrative update for Jonas' e-mail address. The spi-geni-qcom fix
is more major than the others, fixing the newly added DMA support for
large reads which trigger DMA.
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Merge tag 'spi-fix-v6.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few mostly minor fixes that came in during the merge window, plus
one administrative update for Jonas' e-mail address.
The spi-geni-qcom fix is more major than the others, fixing the newly
added DMA support for large reads which trigger DMA"
* tag 'spi-fix-v6.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: bcm{63xx,bca}-hsspi: update my email address
spi: rzv2m-csi: Fix SoC product name
spi: bcm-qspi: return error if neither hif_mspi nor mspi is available
spi: spi-geni-qcom: enable SPI_CONTROLLER_MUST_TX for GPI DMA mode
Update my email address to a working one, as the openwrt.org one is
broken since ages.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: William Zhang <william.zhang@broadcom.com>
Link: https://lore.kernel.org/r/20230630202257.8449-2-jonas.gorski@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
If neither a "hif_mspi" nor "mspi" resource is present, the driver will
just early exit in probe but still return success. Apart from not doing
anything meaningful, this would then also lead to a null pointer access
on removal, as platform_get_drvdata() would return NULL, which it would
then try to dereference when trying to unregister the spi master.
Fix this by unconditionally calling devm_ioremap_resource(), as it can
handle a NULL res and will then return a viable ERR_PTR() if we get one.
The "return 0;" was previously a "goto qspi_resource_err;" where then
ret was returned, but since ret was still initialized to 0 at this place
this was a valid conversion in 63c5395bb7 ("spi: bcm-qspi: Fix
use-after-free on unbind"). The issue was not introduced by this commit,
only made more obvious.
Fixes: fa236a7ef2 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Kamal Dasu <kamal.dasu@broadcom.com>
Link: https://lore.kernel.org/r/20230629134306.95823-1-jonas.gorski@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The GPI DMA mode requires for TX DMA to be prepared. Force SPI core to
provide TX buffer even if the caller didn't provide one by setting the
SPI_CONTROLLER_MUST_TX flag.
Fixes: b59c122484 ("spi: spi-geni-qcom: Add support for GPI dma")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230629095847.3648597-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
One small core feature this time around but mostly driver improvements
and additions for SPI:
- Add support for controlling the idle state of MOSI, some systems can
support this and depending on the system integration may need it to
avoid glitching in some situations.
- Support for polling mode in the S3C64xx driver and DMA on the
Qualcomm QSPI driver.
- Support for several Allwinner SoCs, AMD Pensando Elba, Intel Mount
Evans, Renesas RZ/V2M, and ST STM32H7.
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Merge tag 'spi-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"One small core feature this time around but mostly driver improvements
and additions for SPI:
- Add support for controlling the idle state of MOSI, some systems
can support this and depending on the system integration may need
it to avoid glitching in some situations
- Support for polling mode in the S3C64xx driver and DMA on the
Qualcomm QSPI driver
- Support for several Allwinner SoCs, AMD Pensando Elba, Intel Mount
Evans, Renesas RZ/V2M, and ST STM32H7"
* tag 'spi-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (66 commits)
spi: dt-bindings: atmel,at91rm9200-spi: fix broken sam9x7 compatible
spi: dt-bindings: atmel,at91rm9200-spi: add sam9x7 compatible
spi: Add support for Renesas CSI
spi: dt-bindings: Add bindings for RZ/V2M CSI
spi: sun6i: Use the new helper to derive the xfer timeout value
spi: atmel: Prevent false timeouts on long transfers
spi: dt-bindings: stm32: do not disable spi-slave property for stm32f4-f7
spi: Create a helper to derive adaptive timeouts
spi: spi-geni-qcom: correctly handle -EPROBE_DEFER from dma_request_chan()
spi: stm32: disable spi-slave property for stm32f4-f7
spi: stm32: introduction of stm32h7 SPI device mode support
spi: stm32: use dmaengine_terminate_{a}sync instead of _all
spi: stm32: renaming of spi_master into spi_controller
spi: dw: Remove misleading comment for Mount Evans SoC
spi: dt-bindings: snps,dw-apb-ssi: Add compatible for Intel Mount Evans SoC
spi: dw: Add compatible for Intel Mount Evans SoC
spi: s3c64xx: Use dev_err_probe()
spi: s3c64xx: Use the managed spi master allocation function
spi: spl022: Probe defer is no error
spi: spi-imx: fix mixing of native and gpio chipselects for imx51/imx53/imx6 variants
...
This release is almost all drivers, there's some small improvements in
the core but otherwise everything is updates to drivers, mostly the
addition of new ones.
There's also a bunch of changes pulled in from the MFD subsystem as
dependencies, Rockchip and TI core MFD code that the regulator drivers
depend on.
I've also yet again managed to put a SPI commit in the regulator tree, I
don't know what it is about those two trees (this for spi-geni-qcom).
- Support for Renesas RAA215300, Rockchip RK808, Texas Instruments
TPS6594 and TPS6287x, and X-Powers AXP15060 and AXP313a
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Merge tag 'regulator-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator updates from Mark Brown:
"This release is almost all drivers, there's some small improvements in
the core but otherwise everything is updates to drivers, mostly the
addition of new ones.
There's also a bunch of changes pulled in from the MFD subsystem as
dependencies, Rockchip and TI core MFD code that the regulator drivers
depend on.
I've also yet again managed to put a SPI commit in the regulator tree,
I don't know what it is about those two trees (this for
spi-geni-qcom).
Summary:
- Support for Renesas RAA215300, Rockchip RK808, Texas Instruments
TPS6594 and TPS6287x, and X-Powers AXP15060 and AXP313a"
* tag 'regulator-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (43 commits)
regulator: Add Renesas PMIC RAA215300 driver
regulator: dt-bindings: Add Renesas RAA215300 PMIC bindings
regulator: ltc3676: Use maple tree register cache
regulator: ltc3589: Use maple tree register cache
regulator: helper: Document ramp_delay parameter of regulator_set_ramp_delay_regmap()
regulator: mt6358: Use linear voltage helpers for single range regulators
regulator: mt6358: Const-ify mt6358_regulator_info data structures
regulator: mt6358: Drop *_SSHUB regulators
regulator: mt6358: Merge VCN33_* regulators
regulator: dt-bindings: mt6358: Drop *_sshub regulators
regulator: dt-bindings: mt6358: Merge ldo_vcn33_* regulators
regulator: dt-bindings: pwm-regulator: Add missing type for "pwm-dutycycle-unit"
regulator: Switch two more i2c drivers back to use .probe()
spi: spi-geni-qcom: Do not do DMA map/unmap inside driver, use framework instead
soc: qcom: geni-se: Add interfaces geni_se_tx_init_dma() and geni_se_rx_init_dma()
regulator: tps6594-regulator: Add driver for TI TPS6594 regulators
regulator: axp20x: Add AXP15060 support
regulator: axp20x: Add support for AXP313a variant
dt-bindings: pfuze100.yaml: Add an entry for interrupts
regulator: stm32-pwr: Fix regulator disabling
...
- Yosry has also eliminated cgroup's atomic rstat flushing.
- Nhat Pham adds the new cachestat() syscall. It provides userspace
with the ability to query pagecache status - a similar concept to
mincore() but more powerful and with improved usability.
- Mel Gorman provides more optimizations for compaction, reducing the
prevalence of page rescanning.
- Lorenzo Stoakes has done some maintanance work on the get_user_pages()
interface.
- Liam Howlett continues with cleanups and maintenance work to the maple
tree code. Peng Zhang also does some work on maple tree.
- Johannes Weiner has done some cleanup work on the compaction code.
- David Hildenbrand has contributed additional selftests for
get_user_pages().
- Thomas Gleixner has contributed some maintenance and optimization work
for the vmalloc code.
- Baolin Wang has provided some compaction cleanups,
- SeongJae Park continues maintenance work on the DAMON code.
- Huang Ying has done some maintenance on the swap code's usage of
device refcounting.
- Christoph Hellwig has some cleanups for the filemap/directio code.
- Ryan Roberts provides two patch series which yield some
rationalization of the kernel's access to pte entries - use the provided
APIs rather than open-coding accesses.
- Lorenzo Stoakes has some fixes to the interaction between pagecache
and directio access to file mappings.
- John Hubbard has a series of fixes to the MM selftesting code.
- ZhangPeng continues the folio conversion campaign.
- Hugh Dickins has been working on the pagetable handling code, mainly
with a view to reducing the load on the mmap_lock.
- Catalin Marinas has reduced the arm64 kmalloc() minimum alignment from
128 to 8.
- Domenico Cerasuolo has improved the zswap reclaim mechanism by
reorganizing the LRU management.
- Matthew Wilcox provides some fixups to make gfs2 work better with the
buffer_head code.
- Vishal Moola also has done some folio conversion work.
- Matthew Wilcox has removed the remnants of the pagevec code - their
functionality is migrated over to struct folio_batch.
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Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull mm updates from Andrew Morton:
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs
- Yosry has also eliminated cgroup's atomic rstat flushing
- Nhat Pham adds the new cachestat() syscall. It provides userspace
with the ability to query pagecache status - a similar concept to
mincore() but more powerful and with improved usability
- Mel Gorman provides more optimizations for compaction, reducing the
prevalence of page rescanning
- Lorenzo Stoakes has done some maintanance work on the
get_user_pages() interface
- Liam Howlett continues with cleanups and maintenance work to the
maple tree code. Peng Zhang also does some work on maple tree
- Johannes Weiner has done some cleanup work on the compaction code
- David Hildenbrand has contributed additional selftests for
get_user_pages()
- Thomas Gleixner has contributed some maintenance and optimization
work for the vmalloc code
- Baolin Wang has provided some compaction cleanups,
- SeongJae Park continues maintenance work on the DAMON code
- Huang Ying has done some maintenance on the swap code's usage of
device refcounting
- Christoph Hellwig has some cleanups for the filemap/directio code
- Ryan Roberts provides two patch series which yield some
rationalization of the kernel's access to pte entries - use the
provided APIs rather than open-coding accesses
- Lorenzo Stoakes has some fixes to the interaction between pagecache
and directio access to file mappings
- John Hubbard has a series of fixes to the MM selftesting code
- ZhangPeng continues the folio conversion campaign
- Hugh Dickins has been working on the pagetable handling code, mainly
with a view to reducing the load on the mmap_lock
- Catalin Marinas has reduced the arm64 kmalloc() minimum alignment
from 128 to 8
- Domenico Cerasuolo has improved the zswap reclaim mechanism by
reorganizing the LRU management
- Matthew Wilcox provides some fixups to make gfs2 work better with the
buffer_head code
- Vishal Moola also has done some folio conversion work
- Matthew Wilcox has removed the remnants of the pagevec code - their
functionality is migrated over to struct folio_batch
* tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits)
mm/hugetlb: remove hugetlb_set_page_subpool()
mm: nommu: correct the range of mmap_sem_read_lock in task_mem()
hugetlb: revert use of page_cache_next_miss()
Revert "page cache: fix page_cache_next/prev_miss off by one"
mm/vmscan: fix root proactive reclaim unthrottling unbalanced node
mm: memcg: rename and document global_reclaim()
mm: kill [add|del]_page_to_lru_list()
mm: compaction: convert to use a folio in isolate_migratepages_block()
mm: zswap: fix double invalidate with exclusive loads
mm: remove unnecessary pagevec includes
mm: remove references to pagevec
mm: rename invalidate_mapping_pagevec to mapping_try_invalidate
mm: remove struct pagevec
net: convert sunrpc from pagevec to folio_batch
i915: convert i915_gpu_error to use a folio_batch
pagevec: rename fbatch_count()
mm: remove check_move_unevictable_pages()
drm: convert drm_gem_put_pages() to use a folio_batch
i915: convert shmem_sg_free_table() to use a folio_batch
scatterlist: add sg_set_folio()
...
Merge series from Biju Das <biju.das.jz@bp.renesas.com>:
This patch series aims to add support for Renesas PMIC RAA215300 and
built-in RTC found on this PMIC device.
The details of PMIC can be found here[1].
Renesas PMIC RAA215300 exposes two separate i2c devices, one for the main
device and another for rtc device.
The RZ/V2M SoC comes with the Clocked Serial Interface (CSI)
IP, which is a master/slave SPI controller.
This commit adds a driver to support CSI master mode.
Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Link: https://lore.kernel.org/r/Message-Id: <20230622113341.657842-4-fabrizio.castro.jz@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Merge series from Miquel Raynal <miquel.raynal@bootlin.com>:
I recently came across an issue with the Atmel spi controller driver
which would stop my transfers after a too small timeout when performing
big transfers (reading a 4MiB flash in one transfer). My initial idea
was to derive a the maximum amount of time a transfer would take
depending on its size and use that as value to avoid erroring-out when
not relevant. Mark wanted to go further by creating a core helper doing
that, based on the heuristics from the sun6i driver.
Here is a small series of 3 patches doing exactly that.
A helper was recently added to the core to factorize common code between
drivers, like the amount of time a driver should wait for a transfer to
happen.
It is of course possible to use a default value (like eg. 1s) but it is
way stronger to adapt this amount of time to the transfer. Indeed, long
transfers (eg. 4MiB) on a slow single-spi bus might take more than the
usual second of timeout and prevent lengthy transfers.
The core helper was heavily inspired by the logic applied in this
driver, the only difference being the minimum amount of time which was
enlarged from 0.1s to 0.5s.
Use this helper instead of open-coding it.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jernej Škrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/Message-Id: <20230622090634.3411468-4-miquel.raynal@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
A slow SPI bus clocks at ~20MHz, which means it would transfer about
2500 bytes per second with a single data line. Big transfers, like when
dealing with flashes can easily reach a few MiB. The current DMA timeout
is set to 1 second, which means any working transfer of about 4MiB will
always be cancelled.
With the above derivations, on a slow bus, we can assume every byte will
take at most 0.4ms. Said otherwise, we could add 4ms to the 1-second
timeout delay every 10kiB. On a 4MiB transfer, it would bring the
timeout delay up to 2.6s which still seems rather acceptable for a
timeout.
The consequence of this is that long transfers might be allowed, which
hence requires the need to interrupt the transfer if wanted by the
user. We can hence switch to the _interruptible variant of
wait_for_completion. This leads to a little bit more handling to also
handle the interrupted case but looks really acceptable overall.
While at it, we drop the useless, noisy and redundant WARN_ON() call.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Ryan Wanner <ryan.wanner@microchip.com>
Link: https://lore.kernel.org/r/Message-Id: <20230622090634.3411468-3-miquel.raynal@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Now spi_geni_grab_gpi_chan() errors are correctly reported, the
-EPROBE_DEFER error should be returned from probe in case the
GPI dma driver is built as module and/or not probed yet.
Fixes: b59c122484 ("spi: spi-geni-qcom: Add support for GPI dma")
Fixes: 6532582c35 ("spi: spi-geni-qcom: fix error handling in spi_geni_grab_gpi_chan()")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230615-topic-sm8550-upstream-fix-spi-geni-qcom-probe-v2-1-670c3d9e8c9c@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Now spi_geni_grab_gpi_chan() errors are correctly reported, the
-EPROBE_DEFER error should be returned from probe in case the
GPI dma driver is built as module and/or not probed yet.
Fixes: b59c122484 ("spi: spi-geni-qcom: Add support for GPI dma")
Fixes: 6532582c35 ("spi: spi-geni-qcom: fix error handling in spi_geni_grab_gpi_chan()")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230615-topic-sm8550-upstream-fix-spi-geni-qcom-probe-v2-1-670c3d9e8c9c@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for stm32h7 to use SPI controller in device role.
In such case, the spi instance should have the spi-slave property
defined.
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230615075815.310261-5-valentin.caron@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Avoid usage of deprecated dmaengine_terminate_all and use
dmaengine_terminate_sync and dmaengine_terminate_async instead.
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230615075815.310261-3-valentin.caron@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Preparing introduction of SPI device, rename the spi_master structure
into spi_controller. This doesn't have any functional impact since
spi_master was already a macro for spi_controller.
Referring now to ctrl instead of master since the spi_controller
structure might not be used as a master controller only.
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230615075815.310261-2-valentin.caron@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
