| Commit message (Collapse) | Author | Age | Files | Lines |
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The ecspi IP block on imx51/imx53/imx6 have four native chip
selects. Tell that to the spi core so that any non-gpio chip selects
get validated against that upper bound.
Also set the SPI_MASTER_GPIO_SS so that the core verifies that, in the
case where both native and gpio chip selects are in use, there is at
least one leftover native chip select (or "channel", in the ecspi
language) for use by the slaves sitting on gpio chip selects.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230425134527.483607-3-linux@rasmusvillemoes.dk
Signed-off-by: Mark Brown <broonie@kernel.org>
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Near the top of the function, spi_imx->controller is set to
controller (and is of course never modified again). The rest of the
function uses a mix of the two expressions.
For consistency, readability and better code generation, drop all the
spi_imx-> indirections.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230425134527.483607-2-linux@rasmusvillemoes.dk
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add the missing kernel documentation to silence the build warning.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230523090124.3132-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The function debugfs_create_dir returns ERR_PTR if an error occurs,
and the appropriate way to verify for errors is to use the inline
function IS_ERR. The patch will substitute the null-comparison with
IS_ERR.
Suggested-by: Ivan Orlov <ivan.orlov0322@gmail.com
Signed-off-by: Yeqi Fu <asuk4.q@gmail.com
Link: https://lore.kernel.org/r/20230518052515.368978-1-asuk4.q@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org
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The AMD Pensando Elba SoC has the Cadence QSPI controller integrated.
The quirk CQSPI_NEEDS_APB_AHB_HAZARD_WAR is added and if enabled
a dummy readback from the controller is performed to ensure
synchronization.
Signed-off-by: Brad Larson <blarson@amd.com
Link: https://lore.kernel.org/r/20230515181606.65953-8-blarson@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org
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n_bytes variable in the driver represents the number of bytes per word
that needs to be sent/copied to fifo. Bits/word can be between 8 and 32
bits from the client but in memory they are a power of 2, same is mentioned
in spi.h header:
"
* @bits_per_word: Data transfers involve one or more words; word sizes
* like eight or 12 bits are common. In-memory wordsizes are
* powers of two bytes (e.g. 20 bit samples use 32 bits).
* This may be changed by the device's driver, or left at the
* default (0) indicating protocol words are eight bit bytes.
* The spi_transfer.bits_per_word can override this for each transfer.
"
Hence, round of n_bytes to a power of 2 to avoid values like 3 which
would generate unalligned/odd accesses to memory/fifo.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Fixes: a51acc2400d4 ("spi: dw: Add support for 32-bits max xfer size")
Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com
Signed-off-by: Joy Chakraborty <joychakr@google.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com
Tested-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230512104746.1797865-4-joychakr@google.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Store address width capabilities of DMA controller during init and check
the same per transfer to make sure the bits/word requirement can be met.
Current DW DMA driver requires both tx and rx channel to be configured
and functional hence a subset of both tx and rx channel address width
capability is checked with the width requirement(n_bytes) for a
transfer.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Signed-off-by: Joy Chakraborty <joychakr@google.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com
Tested-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230512104746.1797865-3-joychakr@google.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Check capabilities of DMA controller during init to make sure it is
capable of handling MEM2DEV for tx channel, DEV2MEM for rx channel.
Current DW DMA driver requires both tx and rx channel to be configured
and functional for any kind of transfers to take effect including
half duplex. Hence, check for both tx and rx direction and fail on
unavailbility of either.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Signed-off-by: Joy Chakraborty <joychakr@google.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com
Tested-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230512104746.1797865-2-joychakr@google.com
Signed-off-by: Mark Brown <broonie@kernel.org
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These SoCs has two SPI controllers. One of it is quite similar to previous
ones, but with internal clock divider removed; the other added MIPI DBI
Type-C offload based on the first one.
Add basical support for these controllers. As we're not going to
support the DBI functionality now, just implement the two kinds of
controllers as the same.
Co-developed-by: Icenowy Zheng <icenowy@aosc.io
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com
Reviewed-by: Andre Przywara <andre.przywara@arm.com
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com
Link: https://lore.kernel.org/r/20230510081121.3463710-5-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Previously SPI controllers in Allwinner SoCs has a clock divider inside.
However now the clock divider is removed and to set the transfer clock
rate it's only needed to set the SPI module clock to the target value
and configure a proper work mode.
According to the datasheet there are three work modes:
| SPI Sample Mode | SDM(bit13) | SDC(bit11) | Run Clock |
|-------------------------|------------|------------|-----------|
| normal sample | 1 | 0 | <= 24 MHz |
| delay half cycle sample | 0 | 0 | <= 40 MHz |
| delay one cycle sample | 0 | 1 | >= 80 MHz |
Add a quirk for this kind of SPI controllers.
Co-developed-by: Icenowy Zheng <icenowy@aosc.io
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com
Reviewed-by: Andre Przywara <andre.przywara@arm.com
Link: https://lore.kernel.org/r/20230510081121.3463710-4-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org
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As we're adding more properties to the OF match data, convert it to a
struct now.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com
Reviewed-by: Samuel Holland <samuel@sholland.org
Reviewed-by: Andre Przywara <andre.przywara@arm.com
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com
Link: https://lore.kernel.org/r/20230510081121.3463710-3-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Fixing the problem of enabling DMA mode and IRQ mode at the same time.
In this case, a value of more than 6bits is written to RDY_LVL, it can
cause an invasion of other registers, potentially leading to SPI
transfer failure.
Fixes: 1ee806718d5e ("spi: s3c64xx: support interrupt based pio mode")
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org
Link: https://lore.kernel.org/r/20230510113942.89994-1-jaewon02.kim@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Merge series from Joy Chakraborty <joychakr@google.com>:
This Patch series adds support for 32 bits per word trasfers using DMA
and some defensive checks around dma controller capabilities.
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Move dw_spi_can_dma() implementation below dw_spi_dma_convert_width()
for handing compile dependency in future patches.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Signed-off-by: Joy Chakraborty <joychakr@google.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com
Tested-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230427123314.1997152-3-joychakr@google.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Add Support for AxSize = 4 bytes configuration from dw dma driver if
n_bytes i.e. number of bytes per write to fifo is 4.
Number of bytes written to fifo per write is depended on the bits/word
configuration being used which the DW core driver translates to n_bytes.
Hence, for bits per word values between 17 and 32 n_bytes should be
equal to 4.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Signed-off-by: Joy Chakraborty <joychakr@google.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com
Tested-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230427123314.1997152-2-joychakr@google.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Merge series from Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>:
There are large number of QSPI irqs that fire during boot/init and later
on every suspend/resume.
This could be made faster by doing DMA instead of PIO.
Below is comparison for number of interrupts raised in 2 scenarios...
Boot up and stabilise
Suspend/Resume
Sequence PIO DMA
=======================
Boot-up 69088 19284
S/R 5066 3430
Speed test results...
spi-nor read times in sec after 2 min uptime
============================================
PIO - Iterations-1000, min=3.18, max=3.74, avg=3.53
DMA - Iterations-1000, min=1.21, max=2.28, avg=1.79
spi-nor write times in sec after 2 min uptime
=============================================
PIO - Iterations-1000, min=3.20, max=8.24, avg=3.58
DMA - Iterations-1000, min=1.25, max=5.13, avg=1.82
Further testing performed...
a) multiple entries in sgt (simulated by max_dma_len = 1024)
b) fallback to pio (simulated by dma setup failure)
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Current driver supports only PIO mode.
HW supports DMA, so add DMA mode support to the driver
for better performance for larger xfers.
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com
Reviewed-by: Douglas Anderson <dianders@chromium.org
Link: https://lore.kernel.org/r/1682328761-17517-6-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Merge series from Jaewon Kim <jaewon02.kim@samsung.com>:
Previously, polling mode was supported as quirk for SOC without DMA.
In order to use it more flexibly, it is supported when there is
no dmas property in devicetree, and the issue of using excessive CPU
usage in polling mode is solved by adding sleep during transfer time and
supporting interrupt mode.
Changes in V3.
- Fix patch commit message.
- Change of_find_property() to of_property_present() with code cleanup
- Remove cpu_relax() related patch.
- Changes use_irq variable type to bool
Changes in V2.
- Switched to polling mode if there is no dmas property in devicetree.
- Add cpu_releax() in polling loop
- Add lower limit in IRQ mode
Jaewon Kim (3):
spi: s3c64xx: change polling mode to optional
spi: s3c64xx: add sleep during transfer
spi: s3c64xx: support interrupt based pio mode
drivers/spi/spi-s3c64xx.c | 81 +++++++++++++++++++----
include/linux/platform_data/spi-s3c64xx.h | 1 +
2 files changed, 70 insertions(+), 12 deletions(-)
--
2.17.1
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Support interrupt based pio mode to optimize cpu usage.
When transmitting data size is larget than 32 bytes, operates with
interrupt based pio mode.
By using the FIFORDY INT, an interrupt can be triggered when
the desired size of data has been received. Using this, we can support
interrupt based pio mode.
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com
Link: https://lore.kernel.org/r/20230502062813.112434-4-jaewon02.kim@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org
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In polling mode, the status register is continuously read to check data
transfer completion. It can cause excessive CPU usage.
To reduce this, we can calculate the transfer time and put the sleep during
transfer.
When test on ExynosAuto9 SADK board, throughput remained the same, but
100% CPU utilization decreased to 40%.
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org
Link: https://lore.kernel.org/r/20230502062813.112434-3-jaewon02.kim@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Previously, Polling mode was supported as quirk for SOC without DMA.
To provide more flexible support for polling mode, it changed to polling
mode when the 'dmas' property is not present in the devicetree, rather than
using a quirk.
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org
Link: https://lore.kernel.org/r/20230502062813.112434-2-jaewon02.kim@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org
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The CS_TOGGLE bit when set is supposed to instruct FW to
toggle CS line between words. The driver with intent of
disabling this behaviour has been unsetting BIT(0). This has
not caused any trouble so far because the original BIT(1)
is untouched and BIT(0) likely wasn't being used.
Correct this to prevent a potential future bug.
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org
Fixes: 561de45f72bd ("spi: spi-geni-qcom: Add SPI driver support for GENI based QUP")
Reviewed-by: Douglas Anderson <dianders@chromium.org
Link: https://lore.kernel.org/r/1682412128-1913-1-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Avoid config.speed_hz is 0 when it is a divisor.
Signed-off-by: Han Xu <han.xu@nxp.com
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com
Link: https://lore.kernel.org/r/20230505064159.3964473-1-xiaoning.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org
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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
...
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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.
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The spi geni driver in SE DMA mode, unlike GSI DMA, is not making use of
DMA mapping functionality available in the framework.
The driver does mapping internally which makes dma buffer fields available
in spi_transfer struct superfluous while requiring additional members in
spi_geni_master struct.
Conform to the design by having framework handle map/unmap and do only
DMA transfer in the driver; this also simplifies code a bit.
Fixes: e5f0dfa78ac7 ("spi: spi-geni-qcom: Add support for SE DMA mode")
Suggested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/1684325894-30252-3-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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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()
...
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ARCH_DMA_MINALIGN represents the minimum (static) alignment for safe DMA
operations while ARCH_KMALLOC_MINALIGN is the minimum kmalloc() objects
alignment.
Link: https://lkml.kernel.org/r/20230612153201.554742-9-catalin.marinas@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Mark Brown <broonie@kernel.org>
Tested-by: Isaac J. Manjarres <isaacmanjarres@google.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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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: b59c122484ec ("spi: spi-geni-qcom: Add support for GPI dma")
Fixes: 6532582c353f ("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>
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Commit 445164e8c136 ("spi: dw: Replace spi->chip_select references with
function calls") replaced direct access to spi.chip_select with
spi_*_chipselect calls but incorrectly replaced a set instance with a
get instance, replace the incorrect instance.
Fixes: 445164e8c136 ("spi: dw: Replace spi->chip_select references with function calls")
Signed-off-by: Abe Kohandel <abe.kohandel@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20230613162103.569812-1-abe.kohandel@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The DSPI controller has configurable timing for
(a) tCSC: the interval between the assertion of the chip select and the
first clock edge
(b) tASC: the interval between the last clock edge and the deassertion
of the chip select
What is a bit surprising, but is documented in the figure "Example of
continuous transfer (CPHA=1, CONT=1)" in the datasheet, is that when the
chip select stays asserted between multiple TX FIFO writes, the tCSC and
tASC times still apply. With CONT=1, chip select remains asserted, but
SCK takes a break and goes to the idle state for tASC + tCSC ns.
In other words, the default values (of 0 and 0 ns) result in SCK
glitches where the SCK transition to the idle state, as well as the SCK
transition from the idle state, will have no delay in between, and it
may appear that a SCK cycle has simply gone missing. The resulting
timing violation might cause data corruption in many peripherals, as
their chip select is asserted.
The driver has device tree bindings for tCSC ("fsl,spi-cs-sck-delay")
and tASC ("fsl,spi-sck-cs-delay"), but these are only specified to apply
when the chip select toggles in the first place, and this timing
characteristic depends on each peripheral. Many peripherals do not have
explicit timing requirements, so many device trees do not have these
properties present at all.
Nonetheless, the lack of SCK glitches is a common sense requirement, and
since the SCK stays in the idle state during transfers for tCSC+tASC ns,
and that in itself should look like half a cycle, then let's ensure that
tCSC and tASC are at least a quarter of a SCK period, such that their
sum is at least half of one.
Fixes: 95bf15f38641 ("spi: fsl-dspi: Add ~50ns delay between cs and sck")
Reported-by: Lisa Chen (陈敏捷) <minjie.chen@geekplus.com>
Debugged-by: Lisa Chen (陈敏捷) <minjie.chen@geekplus.com>
Tested-by: Lisa Chen (陈敏捷) <minjie.chen@geekplus.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230529223402.1199503-1-vladimir.oltean@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add check for dma_set_mask() and return the error if it fails.
Fixes: 1a6f854f7daa ("spi: cadence-quadspi: Add Xilinx Versal external DMA support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20230606093859.27818-1-jiasheng@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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It is usually better to request all necessary resources (clocks,
regulators, ...) before starting to make use of them. That way they do
not change state in case one of the resources is not available yet and
probe deferral (-EPROBE_DEFER) is necessary. This is particularly
important for DMA channels and IOMMUs which are not enforced by
fw_devlink yet (unless you use fw_devlink.strict=1).
spi-qup does this in the wrong order, the clocks are enabled and
disabled again when the DMA channels are not available yet.
This causes issues in some cases: On most SoCs one of the SPI QUP
clocks is shared with the UART controller. When using earlycon UART is
actively used during boot but might not have probed yet, usually for
the same reason (waiting for the DMA controller). In this case, the
brief enable/disable cycle ends up gating the clock and further UART
console output will halt the system completely.
Avoid this by requesting the DMA channels before changing the clock
state.
Fixes: 612762e82ae6 ("spi: qup: Add DMA capabilities")
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20230518-spi-qup-clk-defer-v1-1-f49fc9ca4e02@gerhold.net
Signed-off-by: Mark Brown <broonie@kernel.org>
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When unloading the spi-mt65xx kernel module during an ongoing spi-mem
operation the kernel will Oops shortly after unloading the module.
This is because wait_for_completion_timeout was still running and
returning into the no longer loaded module:
Internal error: Oops: 0000000096000005 [#1] SMP
Modules linked in: [many, but spi-mt65xx is no longer there]
CPU: 0 PID: 2578 Comm: block Tainted: G W O 6.3.0-next-20230428+ #0
Hardware name: Bananapi BPI-R3 (DT)
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0x18c/0x20e8
lr : __lock_acquire+0x9b8/0x20e8
sp : ffffffc009ec3400
x29: ffffffc009ec3400 x28: 0000000000000001 x27: 0000000000000004
x26: ffffff80082888c8 x25: 0000000000000000 x24: 0000000000000000
x23: ffffffc009609da8 x22: ffffff8008288000 x21: ffffff8008288968
x20: 00000000000003c2 x19: ffffff8008be7990 x18: 00000000000002af
x17: 0000000000000000 x16: 0000000000000000 x15: ffffffc008d78970
x14: 000000000000080d x13: 00000000000002af x12: 00000000ffffffea
x11: 00000000ffffefff x10: ffffffc008dd0970 x9 : ffffffc008d78918
x8 : 0000000000017fe8 x7 : 0000000000000001 x6 : 0000000000000000
x5 : ffffff807fb53910 x4 : 0000000000000000 x3 : 0000000000000027
x2 : 0000000000000027 x1 : 0000000000000000 x0 : 00000000000c03c2
Call trace:
__lock_acquire+0x18c/0x20e8
lock_acquire+0x100/0x2a4
_raw_spin_lock_irq+0x58/0x74
__wait_for_common+0xe0/0x1b4
wait_for_completion_timeout+0x1c/0x24
0xffffffc000acc8a4 <--- used to be mtk_spi_transfer_wait
spi_mem_exec_op+0x390/0x3ec
spi_mem_no_dirmap_read+0x6c/0x88
spi_mem_dirmap_read+0xcc/0x12c
spinand_read_page+0xf8/0x1dc
spinand_mtd_read+0x1b4/0x2fc
mtd_read_oob_std+0x58/0x7c
mtd_read_oob+0x8c/0x148
mtd_read+0x50/0x6c
...
Prevent this by completing in mtk_spi_remove if needed.
Fixes: 9f763fd20da7 ("spi: mediatek: add spi memory support for ipm design")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/ZFAF6pJxMu1z6k4w@makrotopia.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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When all bits of IER are set to 0, we still can observe the lpspi irq events
when using DMA mode to transfer data.
So disable irq to avoid the too much irq events.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Link: https://lore.kernel.org/r/20230505063557.3962220-1-xiaoning.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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When working in slave mode it seems the timing is exceedingly tight.
The TX FIFO can never empty, because the master is driving the clock so
zeros would be sent for those bytes where the FIFO is empty.
Return to interleaving the writing of the TX FIFO and the reading
of the RX FIFO to try to ensure the data is available when required.
Fixes: a84c11e16dc2 ("spi: spi-cadence: Avoid read of RX FIFO before its ready")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230518093927.711358-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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New set/get APIs for accessing spi->chip_select were introduced by
'commit 9e264f3f85a5 ("spi: Replace all spi->chip_select and spi->cs_gpiod
references with function call")', but the 'commit 2c8606040a80 ("spi: dw:
Add support for AMD Pensando Elba SoC")' uses the old interface by directly
accessing spi->chip_select. So, replace all spi->chip_select references
in the driver with new get/set APIs.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com
Acked-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230515130343.63770-1-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Commit b1b90514eaa3 ("spi: spi-cadence: Add support for Slave mode")
updated the code to trigger the IRQ when the FIFO was half empty,
overlapping filling more data into the FIFO and sending what is left.
This appears to cause regressions on the Zynq 7000, for transactions
longer than the FIFO size, below that no overlapping occurs.
It would appear from my testing that any attempt to put new data into
the FIFO whilst data is still transmitting causes data corruption
on both send and receive. If I am reading the commit message right
on commit 49530e641178 ("spi: cadence: Add usleep_range() for
cdns_spi_fill_tx_fifo()"), that would also seem to imply this is the
case.
On the assumption that this isn't an issue on the platform
the original slave mode support was added for, update the
cdns_transfer_one to only set the watermark to 50% of the FIFO size
when in slave mode. There by retaining the new behaviour for slave
mode but reverting to the older behaviour when the SPI is used a
master.
Fixes: b1b90514eaa3 ("spi: spi-cadence: Add support for Slave mode")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230509164153.3907694-2-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Recent changes to cdns_spi_irq introduced some issues.
Firstly, when writing the end of a longer transaction, the code in
cdns_spi_irq will write data into the TX FIFO, then immediately
fall into the if (!xspi->tx_bytes) path and attempt to read data
from the RX FIFO. However this required waiting for the TX FIFO to
empty before the RX data was ready.
Secondly, the variable trans_cnt is now rather inaccurately named
since in cases, where the watermark is set to 1, trans_cnt will be
1 but the count of bytes transferred would be much longer.
Finally, when setting up the transaction we set the watermark to 50%
of the FIFO if the transaction is great than 50% of the FIFO. However,
there is no need to split a tranaction that is smaller than the
whole FIFO, so anything up to the FIFO size can be done in a single
transaction.
Tidy up the code a little, to avoid repeatedly calling
cdns_spi_read_rx_fifo with a count of 1, and correct the three issues
noted above.
Fixes: b1b90514eaa3 ("spi: spi-cadence: Add support for Slave mode")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230509164153.3907694-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org
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Spi geni driver switches between FIFO and DMA modes based on xfer length.
FIFO mode relies on M_CMD_DONE_EN interrupt for completion while DMA mode
relies on XX_DMA_DONE.
During dynamic switching, if FIFO mode is chosen, FIFO related interrupts
are enabled and DMA related interrupts are disabled. And viceversa.
Chip select shares M_CMD_DONE_EN interrupt with FIFO to check completion.
Now, if a chip select operation is preceded by a DMA xfer, M_CMD_DONE_EN
interrupt would have been disabled and hence it will never receive one
resulting in timeout.
For chip select, in addition to setting the xfer mode to FIFO,
select_mode() to FIFO so that required interrupts are enabled.
Fixes: e5f0dfa78ac7 ("spi: spi-geni-qcom: Add support for SE DMA mode")
Suggested-by: Praveen Talari <quic_ptalari@quicinc.com
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com
Reviewed-by: Douglas Anderson <dianders@chromium.org
Link: https://lore.kernel.org/r/1683626496-9685-1-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc drivers updates from Greg KH:
"Here is the "big" set of char/misc and other driver subsystems for
6.4-rc1.
It's pretty big, but due to the removal of pcmcia drivers, almost
breaks even for number of lines added vs. removed, a nice change.
Included in here are:
- removal of unused PCMCIA drivers (finally!)
- Interconnect driver updates and additions
- Lots of IIO driver updates and additions
- MHI driver updates
- Coresight driver updates
- NVMEM driver updates, which required some OF updates
- W1 driver updates and a new maintainer to manage the subsystem
- FPGA driver updates
- New driver subsystem, CDX, for AMD systems
- lots of other small driver updates and additions
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (196 commits)
mcb-lpc: Reallocate memory region to avoid memory overlapping
mcb-pci: Reallocate memory region to avoid memory overlapping
mcb: Return actual parsed size when reading chameleon table
kernel/configs: Drop Android config fragments
virt: acrn: Replace obsolete memalign() with posix_memalign()
spmi: Add a check for remove callback when removing a SPMI driver
spmi: fix W=1 kernel-doc warnings
spmi: mtk-pmif: Drop of_match_ptr for ID table
spmi: pmic-arb: Convert to platform remove callback returning void
spmi: mtk-pmif: Convert to platform remove callback returning void
spmi: hisi-spmi-controller: Convert to platform remove callback returning void
w1: gpio: remove unnecessary ENOMEM messages
w1: omap-hdq: remove unnecessary ENOMEM messages
w1: omap-hdq: add SPDX tag
w1: omap-hdq: allow compile testing
w1: matrox: remove unnecessary ENOMEM messages
w1: matrox: use inline over __inline__
w1: matrox: switch from asm to linux header
w1: ds2482: do not use assignment in if condition
w1: ds2482: drop unnecessary header
...
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This helper does not produce a real modalias, but tries to get the
"product" compatible part of the "vendor,product" compatibles only. It
is far from creating a purely useful modalias string and does not seem
to be used like that directly anyway, so let's try to give this helper a
more meaningful name before moving there a real modalias helper (already
existing under of/device.c).
Also update the various documentations to refer to the strings as
"aliases" rather than "modaliases" which has a real meaning in the Linux
kernel.
There is no functional change.
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Wolfram Sang <wsa@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Link: https://lore.kernel.org/r/20230404172148.82422-9-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the large set of driver core changes for 6.4-rc1.
Once again, a busy development cycle, with lots of changes happening
in the driver core in the quest to be able to move "struct bus" and
"struct class" into read-only memory, a task now complete with these
changes.
This will make the future rust interactions with the driver core more
"provably correct" as well as providing more obvious lifetime rules
for all busses and classes in the kernel.
The changes required for this did touch many individual classes and
busses as many callbacks were changed to take const * parameters
instead. All of these changes have been submitted to the various
subsystem maintainers, giving them plenty of time to review, and most
of them actually did so.
Other than those changes, included in here are a small set of other
things:
- kobject logging improvements
- cacheinfo improvements and updates
- obligatory fw_devlink updates and fixes
- documentation updates
- device property cleanups and const * changes
- firwmare loader dependency fixes.
All of these have been in linux-next for a while with no reported
problems"
* tag 'driver-core-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (120 commits)
device property: make device_property functions take const device *
driver core: update comments in device_rename()
driver core: Don't require dynamic_debug for initcall_debug probe timing
firmware_loader: rework crypto dependencies
firmware_loader: Strip off \n from customized path
zram: fix up permission for the hot_add sysfs file
cacheinfo: Add use_arch[|_cache]_info field/function
arch_topology: Remove early cacheinfo error message if -ENOENT
cacheinfo: Check cache properties are present in DT
cacheinfo: Check sib_leaf in cache_leaves_are_shared()
cacheinfo: Allow early level detection when DT/ACPI info is missing/broken
cacheinfo: Add arm64 early level initializer implementation
cacheinfo: Add arch specific early level initializer
tty: make tty_class a static const structure
driver core: class: remove struct class_interface * from callbacks
driver core: class: mark the struct class in struct class_interface constant
driver core: class: make class_register() take a const *
driver core: class: mark class_release() as taking a const *
driver core: remove incorrect comment for device_create*
MIPS: vpe-cmp: remove module owner pointer from struct class usage.
...
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The module pointer in class_create() never actually did anything, and it
shouldn't have been requred to be set as a parameter even if it did
something. So just remove it and fix up all callers of the function in
the kernel tree at the same time.
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20230313181843.1207845-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There is no need to manually set the owner of a struct class, as the
registering function does it automatically, so remove all of the
explicit settings from various drivers that did so as it is unneeded.
This allows us to remove this pointer entirely from this structure going
forward.
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230313181843.1207845-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"A fairly standard release for SPI with the exception of a change to
the API for specifying chip selects done in preparation for supporting
devices with more than one chip select, this required some mechanical
changes throughout the tree which have been cooking in -next happily
for a while.
There's also a new API to allow us to support TPM chips on half duplex
controllers.
Summary:
- Refactoring in preparation for supporting multiple chip selects for
a single device, needed by some flash devices, which required a
change in the SPI device API visible throughout the tree
- Support for hardware assisted interaction with SPI TPMs on half
duplex controllers, implemented on nVidia Tedra210 QuadSPI
- Optimisation for large transfers on fsl-cpm devices
- Cleanups around device property use which fix some sisues with
fwnode
- Use of both void remove() and devm_platform_.*ioremap_resource()
- Support for AMD Pensando Elba, Amlogic A1, Cadence device mode,
Intel MetorLake-S and StarFive J7110 QuadSPI"
* tag 'spi-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (185 commits)
spi: bcm63xx: use macro DEFINE_SIMPLE_DEV_PM_OPS
spi: tegra210-quad: Enable TPM wait polling
spi: Add TPM HW flow flag
spi: bcm63xx: remove PM_SLEEP based conditional compilation
spi: cadence-quadspi: use macro DEFINE_SIMPLE_DEV_PM_OPS
spi: spi-cadence: Add support for Slave mode
spi: spi-cadence: Switch to spi_controller structure
spi: cadence-quadspi: fix suspend-resume implementations
spi: dw: Add support for AMD Pensando Elba SoC
spi: dw: Add AMD Pensando Elba SoC SPI Controller
spi: cadence-quadspi: Disable the SPI before reconfiguring
spi: cadence-quadspi: Update the read timeout based on the length
spi: spi-loopback-test: Add module param for iteration length
spi: add support for Amlogic A1 SPI Flash Controller
dt-bindings: spi: add Amlogic A1 SPI controller
spi: fsl-spi: No need to check transfer length versus word size
spi: fsl-spi: Change mspi_apply_cpu_mode_quirks() to void
spi: fsl-cpm: Use 16 bit mode for large transfers with even size
spi: fsl-spi: Re-organise transfer bits_per_word adaptation
spi: fsl-spi: Fix CPM/QE mode Litte Endian
...
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Using this macro makes the code more readable.
It also inits the members of dev_pm_ops in the following manner
without us explicitly needing to:
.suspend = bcm63xx_spi_suspend, \
.resume = bcm63xx_spi_resume, \
.freeze = bcm63xx_spi_suspend, \
.thaw = bcm63xx_spi_resume, \
.poweroff = bcm63xx_spi_suspend, \
.restore = bcm63xx_spi_resume
Signed-off-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/r/20230424102546.1604484-1-d-gole@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Merge series from Krishna Yarlagadda <kyarlagadda@nvidia.com>:
TPM devices may insert wait state on last clock cycle of ADDR phase.
For SPI controllers that support full-duplex transfers, this can be
detected using software by reading the MISO line. For SPI controllers
that only support half-duplex transfers, such as the Tegra QSPI, it is
not possible to detect the wait signal from software. The QSPI
controller in Tegra234 and Tegra241 implement hardware detection of the
wait signal which can be enabled in the controller for TPM devices.
Add a flag for this in the SPI core and implement support in the Tegra
QuadSPI driver.
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Trusted Platform Module requires flow control. As defined in TPM
interface specification, client would drive MISO line at same cycle as
last address bit on MOSI.
Tegra234 and Tegra241 QSPI controllers have TPM wait state detection
feature which is enabled for TPM client devices reported in SPI device
mode bits.
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20230421091309.2672-4-kyarlagadda@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Get rid of conditional compilation based on CONFIG_PM_SLEEP because
it may introduce build issues with certain configs where it maybe disabled
This is because if above config is not enabled the suspend-resume
functions are never part of the code but the bcm63xx_spi_pm_ops struct
still inits them to non-existent suspend-resume functions.
Fixes: b42dfed83d95 ("spi: add Broadcom BCM63xx SPI controller driver")
Signed-off-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/r/20230420121615.967487-1-d-gole@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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