this patch takes the io_mutex to prevent an unprotected HW
register modification in the set_cs_timing callback.

Fixes: 4cea6b8c ("spi: add power control when set_cs_timing")
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Link: https://lore.kernel.org/r/20210508060214.1485-1-leilk.liu@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>

'dspi_request_dma()' should be undone by a 'dspi_release_dma()' call in the
error handling path of the probe function, as already done in the remove
function

Fixes: 90ba3703 ("spi: spi-fsl-dspi: Add DMA support for Vybrid")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/d51caaac747277a1099ba8dea07acd85435b857e.1620587472.git.christophe.jaillet@wanadoo.frSigned-off-by: Mark Brown <broonie@kernel.org>

When the number of bytes for the op is greater than one, the read could
run off the end of the function stack and cause a crash.

This patch restores the behaviour of safely reading out of the original
opcode location.
Signed-off-by: Karen Dombroski <karen.dombroski@marsbioimaging.com>
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Link: https://lore.kernel.org/r/20210429053802.17650-3-amit.kumar-mahapatra@xilinx.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix kernel-doc warning.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Link: https://lore.kernel.org/r/20210429053802.17650-2-amit.kumar-mahapatra@xilinx.comSigned-off-by: Mark Brown <broonie@kernel.org>

The SPI_ALTERA_CORE config symbol controls compilation of the Altera SPI
Controller core code.  It is already selected by all of its users, so
there is no reason to make it visible, unless compile-testing.

Fixes: b0c3d935 ("spi: altera: separate core code from platform code")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/f0cb8e66baba4506db6f42fca74dc51b76883507.1619534253.git.geert+renesas@glider.beSigned-off-by: Mark Brown <broonie@kernel.org>

When an SPI device is unregistered, the spi->controller->cleanup() is
called in the device's release callback. That's wrong for a couple of
reasons:

1. spi_dev_put() can be called before spi_add_device() is called. And
   it's spi_add_device() that calls spi_setup(). This will cause clean()
   to get called without the spi device ever being setup.

2. There's no guarantee that the controller's driver would be present by
   the time the spi device's release function gets called.

3. It also causes "sleeping in atomic context" stack dump[1] when device
   link deletion code does a put_device() on the spi device.

Fix these issues by simply moving the cleanup from the device release
callback to the actual spi_unregister_device() function.

[1] - https://lore.kernel.org/lkml/CAHp75Vc=FCGcUyS0v6fnxme2YJ+qD+Y-hQDQLa2JhWNON9VmsQ@mail.gmail.com/Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20210426235638.1285530-1-saravanak@google.comSigned-off-by: Mark Brown <broonie@kernel.org>

The enable1 is confusing name. Change it to clearly show what is
the intention behind it. No functional changes.

Fixes: 25093bde ("spi: implement SW control for CS times")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210420131846.75983-1-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Convert the Freescale QSPI binding to DT schema format using json-schema.
Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210312054038.3586706-1-kuldeep.singh@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

Printing size_t needs a special %zx format modifier to avoid a
warning like:

drivers/spi/spi-stm32-qspi.c:481:41: note: format string is defined here
  481 |         dev_dbg(qspi->dev, "%s len = 0x%x offs = 0x%llx buf = 0x%p\n", __func__, len, offs, buf);

Patrice already tried to fix this, but picked %lx instead of %zx,
which fixed some architectures but broke others in the same way.
Using %zx works everywhere.

Fixes: 18674dee ("spi: stm32-qspi: Add dirmap support")
Fixes: 1b8a7d42 ("spi: stm32-qspi: Fix compilation warning in ARM64")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210422134955.1988316-1-arnd@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

The header file spi.h in include/uapi/linux/spi is needed for spidev.h,
so we also need make a symbolic link to it to eliminate the error message
as below:

In file included from spidev_test.c:24:
include/linux/spi/spidev.h:28:10: fatal error: linux/spi/spi.h: No such file or directory
   28 | #include <linux/spi/spi.h>
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.

Fixes: f7005142 ("spi: uapi: unify SPI modes into a single spi.h")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210422102604.3034217-1-quanyang.wang@windriver.comSigned-off-by: Mark Brown <broonie@kernel.org>

'for_each_available_child_of_node' performs an of_node_get on each
iteration, so a return from the middle of the loop requires an of_node_put.

Fixes: bbb6b2f9 ("spi: Add FSI-attached SPI controller driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/504e431b900341249d331b868d90312cf41f415a.1618947919.git.christophe.jaillet@wanadoo.frSigned-off-by: Mark Brown <broonie@kernel.org>

Each time we call spi_get_gpio_descs() the num_chipselect is overwritten
either by new value or by the old one. This is an extra operation in case
gpiod_count() returns an error. Besides that it slashes the error handling
of gpiod_count().

Refactor the code to make error handling of gpiod_count() call cleaner.

Note, that gpiod_count() never returns 0, take this into account as well.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210420164040.40055-1-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Matthew Gerlach <matthew.gerlach@linux.intel.com>:

From: Matthew Gerlach <matthew.gerlach@linux.intel.com>

This patch set adds Device Feature List (DFL) bus support for
the Altera SPI Master controller.

Patch 1 separates spi-altera.c into spi-altera-core.c and
spi-altera-platform.c.

Patch 2 adds spi-altera-dfl.c.

Matthew Gerlach (2):
  spi: altera: separate core code from platform code
  spi: altera: Add DFL bus driver for Altera API Controller

 drivers/spi/Kconfig               |  18 +-
 drivers/spi/Makefile              |   4 +-
 drivers/spi/spi-altera-core.c     | 222 ++++++++++++++++++++++
 drivers/spi/spi-altera-dfl.c      | 204 ++++++++++++++++++++
 drivers/spi/spi-altera-platform.c | 172 +++++++++++++++++
 drivers/spi/spi-altera.c          | 378 --------------------------------------
 include/linux/spi/altera.h        |  21 +++
 7 files changed, 639 insertions(+), 380 deletions(-)
 create mode 100644 drivers/spi/spi-altera-core.c
 create mode 100644 drivers/spi/spi-altera-dfl.c
 create mode 100644 drivers/spi/spi-altera-platform.c
 delete mode 100644 drivers/spi/spi-altera.c

--
1.8.3.1

Add compatible string for Micron SPI NOR Authenta device.
Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com>
Link: https://lore.kernel.org/r/20210419204015.1769-1-sshivamurthy@micron.comSigned-off-by: Mark Brown <broonie@kernel.org>

This helps validating DTS files.

Changes that require mentioning:
1. reg-names
   "mspi_regs" and "bspi_regs" were renamed to "mspi" and "bspi" as that
   is what's used in DTS files and in Linux driver
2. interrupt-names
   Names were reordered. "mspi_done" has to go first as it's always
   required.
3. spi-rx-bus-width
   Property description was dropped as it's part of the
   spi-controller.yaml
4. Examples:
   * drop partitions as they are well documented elsewhere
   * regs and interrupts were formatted and reordered to match yaml
   * <0x1c> was replaced with <&gic>
   * "m25p80" node name became "flash"
   * dropped invalid "m25p,fast-read" property
   * dropped undocumented and Linux-unused "clock-names"

This rewritten binding validates cleanly using the  "dt_binding_check".
Some Linux stored DTS files will require reordering regs and interrupts
to make dtbs_check happy.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210416194723.23855-1-zajec5@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

This patch adds a Device Feature List (DFL) bus driver for the
Altera SPI Master controller.  The SPI master is connected to an
Intel SPI Slave to Avalon Bridge inside an Intel MAX10
BMC Chip.
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Link: https://lore.kernel.org/r/20210416165720.554144-3-matthew.gerlach@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

In preparation of adding support for a new bus type,
separate the core spi-altera code from the platform
driver code.
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Link: https://lore.kernel.org/r/20210416165720.554144-2-matthew.gerlach@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

This fixes warnings detected when compiling in ARM64.
Introduced by 'commit 18674dee ("spi: stm32-qspi: Add dirmap support")'
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20210420082103.1693-1-patrice.chotard@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>

Patrice Chotard <patrice.chotard@foss.st.com>:

From: Patrice Chotard <patrice.chotard@foss.st.com>

Christophe Kerello (1):
  spi: stm32-qspi: fix pm_runtime usage_count counter

Patrice Chotard (2):
  spi: stm32-qspi: Trigger DMA only if more than 4 bytes to transfer
  spi: stm32-qspi: Add dirmap support

 drivers/spi/spi-stm32-qspi.c | 106 +++++++++++++++++++++++++++--------
 1 file changed, 84 insertions(+), 22 deletions(-)

--
2.17.1

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

If the setup callback failed, but the controller has auto_runtime_pm
and set_cs, the setup failure could be missed.
Signed-off-by: Joe Burmeister <joe.burmeister@devtank.co.uk>
Link: https://lore.kernel.org/r/20210419130631.4586-1-joe.burmeister@devtank.co.ukSigned-off-by: Mark Brown <broonie@kernel.org>

When initially probing the SPI slave device, the call for disabling an
SPI device without the SPI_CS_HIGH flag is not applied, as the
condition for checking whether or not the state to be applied equals the
one currently set evaluates to true.

This however might not necessarily be the case, as the chipselect might
be active.

Add a force flag to spi_set_cs which allows to override this
early exit condition. Set it to false everywhere except when called
from spi_setup to sync up the initial CS state.

Fixes commit d40f0b6f ("spi: Avoid setting the chip select if we don't
need to")
Signed-off-by: David Bauer <mail@david-bauer.net>
Link: https://lore.kernel.org/r/20210416195956.121811-1-mail@david-bauer.netSigned-off-by: Mark Brown <broonie@kernel.org>

Add stm32_qspi_dirmap_read() and stm32_qspi_dirmap_create()
to get dirmap support.

Update the exec_op callback which doens't allow anymore memory map
access. Memory map access are only available through the dirmap_read
callback.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20210419121541.11617-4-patrice.chotard@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>

In order to optimize accesses to spi flashes, trigger a DMA only
if more than 4 bytes has to be transferred.

DMA transfer preparation's cost becomes negligible above 4 bytes to
transfer. Below this threshold, indirect transfer give more throughput.

mtd_speedtest shows that page write throughtput increases :
  - from 779 to 853 KiB/s (~9.5%) with s25fl512s SPI-NOR.
  - from 5283 to 5666 KiB/s (~7.25%) with Micron SPI-NAND.
Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20210419121541.11617-3-patrice.chotard@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>

pm_runtime usage_count counter is not well managed.
pm_runtime_put_autosuspend callback drops the usage_counter but this
one has never been increased. Add pm_runtime_get_sync callback to bump up
the usage counter. It is also needed to use pm_runtime_force_suspend and
pm_runtime_force_resume APIs to handle properly the clock.

Fixes: 9d282c17 ("spi: stm32-qspi: Add pm_runtime support")
Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210419121541.11617-2-patrice.chotard@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>

The spi controller supports 44-bit address space on AXI in DMA mode,
so set dma_addr_t width to 44-bit to avoid using a swiotlb mapping.
In addition, if dma_map_single fails, it should return immediately
instead of continuing doing the DMA operation which bases on invalid
address.

This fixes the following crash which occurs in reading a big block
from flash:

[  123.633577] zynqmp-qspi ff0f0000.spi: swiotlb buffer is full (sz: 4194304 bytes), total 32768 (slots), used 0 (slots)
[  123.644230] zynqmp-qspi ff0f0000.spi: ERR:rxdma:memory not mapped
[  123.784625] Unable to handle kernel paging request at virtual address 00000000003fffc0
[  123.792536] Mem abort info:
[  123.795313]   ESR = 0x96000145
[  123.798351]   EC = 0x25: DABT (current EL), IL = 32 bits
[  123.803655]   SET = 0, FnV = 0
[  123.806693]   EA = 0, S1PTW = 0
[  123.809818] Data abort info:
[  123.812683]   ISV = 0, ISS = 0x00000145
[  123.816503]   CM = 1, WnR = 1
[  123.819455] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000805047000
[  123.825887] [00000000003fffc0] pgd=0000000803b45003, p4d=0000000803b45003, pud=0000000000000000
[  123.834586] Internal error: Oops: 96000145 [#1] PREEMPT SMP

Fixes: 1c26372e ("spi: spi-zynqmp-gqspi: Update driver to use spi-mem framework")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210416004652.2975446-6-quanyang.wang@windriver.comSigned-off-by: Mark Brown <broonie@kernel.org>

When handling op->addr, it is using the buffer "tmpbuf" which has been
freed. This will trigger a use-after-free KASAN warning. Let's use
temporary variables to store op->addr.val and op->cmd.opcode to fix
this issue.

Fixes: 1c26372e ("spi: spi-zynqmp-gqspi: Update driver to use spi-mem framework")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210416004652.2975446-5-quanyang.wang@windriver.comSigned-off-by: Mark Brown <broonie@kernel.org>

During a transfer the driver filled the fifo with 4bytes,
even if the data that needs to be transfer is less that 4bytes.
This resulted in slab-out-of-bounds bug in KernelAddressSanitizer.

This patch resolves slab-out-of-bounds bug by filling the fifo
with the number of bytes that needs to transferred.
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Link: https://lore.kernel.org/r/20210416004652.2975446-4-quanyang.wang@windriver.comSigned-off-by: Mark Brown <broonie@kernel.org>

After calling platform_set_drvdata(pdev, xqspi) in probe, the return
value of dev_get_drvdata(dev) is a pointer to struct zynqmp_qspi but
not struct spi_controller. A wrong structure type passing to the
functions spi_controller_suspend/resume will hang the system.

And we should check the return value of spi_controller_suspend, if
an error is returned, return it to PM subsystem to stop suspend.

Also, GQSPI_EN_MASK should be written to GQSPI_EN_OFST to enable
the spi controller in zynqmp_qspi_resume since it was disabled in
zynqmp_qspi_suspend before.

Fixes: 1c26372e ("spi: spi-zynqmp-gqspi: Update driver to use spi-mem framework")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210416004652.2975446-3-quanyang.wang@windriver.comSigned-off-by: Mark Brown <broonie@kernel.org>

The clks "pclk" and "ref_clk" are enabled twice during the probe. The
first time is in the function zynqmp_qspi_probe and the second time is
in zynqmp_qspi_setup_op which is called by devm_spi_register_controller.
Then calling zynqmp_qspi_remove (rmmod this module) to disable these clks
will trigger a warning as below:

[  309.124604] Unpreparing enabled qspi_ref
[  309.128641] WARNING: CPU: 1 PID: 537 at drivers/clk/clk.c:824 clk_core_unprepare+0x108/0x110

Since pm_runtime works now, clks can be enabled/disabled by calling
zynqmp_runtime_suspend/resume. So we don't need to enable these clks
explicitly in zynqmp_qspi_setup_op. Remove them to fix this issue.

And remove clk enabling/disabling in zynqmp_qspi_resume because there is
no spi transfer operation so enabling ref_clk is redundant meanwhile pclk
is not disabled for it is shared with other peripherals.

Furthermore replace clk_enable/disable with clk_prepare_enable and
clk_disable_unprepare in runtime_suspend/resume functions.

Fixes: 1c26372e ("spi: spi-zynqmp-gqspi: Update driver to use spi-mem framework")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210416004652.2975446-2-quanyang.wang@windriver.comSigned-off-by: Mark Brown <broonie@kernel.org>

Merge branch 'for-5.12' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.13

There is a PM usage counter decrement after zynqmp_qspi_init_hw()
without any refcount increment, which leads to refcount leak.Add
a refcount increment to balance the refcount. Also set
auto_runtime_pm to resume suspended spi controller.

Fixes: 9e3a0003 ("spi: zynqmp: Add pm runtime support")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Tested-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210415074644.24646-1-dinghao.liu@zju.edu.cnSigned-off-by: Mark Brown <broonie@kernel.org>

The match data (struct s3c64xx_spi_port_config) stored in of_device_id
and platform_device_id tables is not modified by the driver and can be
handled entirely in a const-way to increase the code safety.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sylwester Nawrocki <snawrocki@kernel.org>
Link: https://lore.kernel.org/r/20210414203343.203119-3-krzysztof.kozlowski@canonical.comSigned-off-by: Mark Brown <broonie@kernel.org>

Correct the name of s3c64xx_spi_port_config structure in kerneldoc:

  drivers/spi/spi-s3c64xx.c:154: warning:
    expecting prototype for struct s3c64xx_spi_info. Prototype was for struct s3c64xx_spi_port_config instead
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sylwester Nawrocki <snawrocki@kernel.org>
Link: https://lore.kernel.org/r/20210414203343.203119-2-krzysztof.kozlowski@canonical.comSigned-off-by: Mark Brown <broonie@kernel.org>

Use of_device_get_match_data() to make the code slightly smaller and to
remove the of_device_id table forward declaration.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sylwester Nawrocki <snawrocki@kernel.org>
Link: https://lore.kernel.org/r/20210414203343.203119-1-krzysztof.kozlowski@canonical.comSigned-off-by: Mark Brown <broonie@kernel.org>

Add support for LPSS SPI on Intel Alder Lake PCH-M.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20210415135917.54144-1-jarkko.nikula@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

This series fix a potential interrupt race condition and
cleanup the ACPI protection for the driver.

Change since v1:
- reword the commit in patch #2
Link: https://lore.kernel.org/linux-spi/1617881505-51552-1-git-send-email-yangyicong@hisilicon.com/

Yicong Yang (2):
  spi: hisi-sfc-v3xx: fix potential irq race condition
  spi: hisi-sfc-v3xx: drop unnecessary ACPI_PTR and related ifendif
    protection

 drivers/spi/spi-hisi-sfc-v3xx.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--
2.8.1

Add the missing unlock before return from function zynqmp_qspi_exec_op()
in the error handling case.

Fixes: a0f65be6 ("spi: spi-zynqmp-gqspi: add mutex locking for exec_op")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210412160025.194171-1-weiyongjun1@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

We use ACPI_PTR() and related ifendif protection for the id table.
This is unnecessary as the struct acpi_device_id is defined in
mod_devicetable.h and doesn't rely on ACPI. The driver doesn't
use any ACPI apis, so it can be compiled in the ACPI=n case
with no warnings.

So remove the ACPI_PTR and related ifendif protection, also
replace the header acpi.h with mod_devicetable.h.
Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/1618228708-37949-3-git-send-email-yangyicong@hisilicon.comSigned-off-by: Mark Brown <broonie@kernel.org>

We mask the irq when the command completion is timeout. This won't
stop the already running irq handler. Use sychronize_irq() after
we mask the irq, to make sure there is no running handler.
Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/1618228708-37949-2-git-send-email-yangyicong@hisilicon.comSigned-off-by: Mark Brown <broonie@kernel.org>

Quanyang Wang <quanyang.wang@windriver.com>:

From: Quanyang Wang <quanyang.wang@windriver.com>

Hello,

This series fix some issues that occurs when the gqspi driver switches to spi-mem framework.

Hi Amit,
I rewrite the "Subject" and "commit message" of these patches, so they
look different from the ones which you reviewed before. I still keep
your "Reviewed-by" and hope you will not mind.

Regards,
Quanyang Wang

Quanyang Wang (4):
  spi: spi-zynqmp-gqspi: use wait_for_completion_timeout to make
    zynqmp_qspi_exec_op not interruptible
  spi: spi-zynqmp-gqspi: add mutex locking for exec_op
  spi: spi-zynqmp-gqspi: transmit dummy circles by using the
    controller's internal functionality
  spi: spi-zynqmp-gqspi: fix incorrect operating mode in
    zynqmp_qspi_read_op

 drivers/spi/spi-zynqmp-gqspi.c | 53 +++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 26 deletions(-)

--
2.25.1

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