Commit Graph

7380 Commits

Author SHA1 Message Date
Krzysztof Kozlowski
6a2ab229ab spi: cadence-quadspi: Simplify with scoped for each OF child loop
Use scoped for_each_available_child_of_node_scoped() when iterating over
device nodes to make code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240814143805.98874-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-08-14 18:26:51 +01:00
Andy Shevchenko
7781f1d120 spi: ppc4xx: Avoid returning 0 when failed to parse and map IRQ
0 is incorrect error code when failed to parse and map IRQ.
Replace OF specific old API for IRQ retrieval with a generic
one to fix this issue.

Fixes: 0f245463b0 ("spi: ppc4xx: handle irq_of_parse_and_map() errors")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20240814144525.2648450-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-08-14 18:26:50 +01:00
Ma Ke
f1011ba20b spi: ppc4xx: handle irq_of_parse_and_map() errors
Zero and negative number is not a valid IRQ for in-kernel code and the
irq_of_parse_and_map() function returns zero on error.  So this check for
valid IRQs should only accept values > 0.

Fixes: 44dab88e7c ("spi: add spi_ppc4xx driver")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://patch.msgid.link/20240722141822.1052370-1-make24@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-08-14 18:26:49 +01:00
Biju Das
0880f66943 spi: rpc-if: Add missing MODULE_DEVICE_TABLE
Add missing MODULE_DEVICE_TABLE definition for automatic loading of the
driver when it is built as a module.

Fixes: eb8d6d464a ("spi: add Renesas RPC-IF driver")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20240731072955.224125-1-biju.das.jz@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-31 12:50:18 +01:00
Witold Sadowski
d58ecc54bb spi: cadence: Add 64BIT Kconfig dependency
xSPI block requires 64 bit operation for proper Marvell SDMA handling.
Disallow bulding on targets without 64 bit support.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240730131627.1874257-1-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-30 14:23:14 +01:00
Mark Brown
5cb7651f78 Marvell HW overlay support for Cadence xSPI
Merge series from Witold Sadowski <wsadowski@marvell.com>:

This patch series adds support for the second version of the Marvell
hardware overlay for the Cadence xSPI IP block. The overlay is a hardware
change made around the original xSPI block. It extends xSPI features with
clock configuration, interrupt masking, and full-duplex, variable-length SPI
operations.

These functionalities allow the xSPI block to operate not only with memory
devices but also with simple SPI devices and TPM devices.

Example ACPI entry:
      Device (SPI0) {
        Name (_HID, "PRP0001")          // ACPI_DT_NAMESPACE_HID
        Name (_UID, 0)
        Name (_DDN, "SPI controller 0")
        Name (_CCA, ONE)

        Method (_STA) {Return (0xF)}

        Name (_CRS, ResourceTemplate() {

          QWordMemory ( ResourceConsumer,// ResourceUsage
                        PosDecode,       // Decode
                        MinFixed,        // MinType
                        MaxFixed,        // MaxType
                        NonCacheable,    // MemType
                        ReadWrite,       // ReadWriteType
                        0,               // AddressGranularity
                        0x804000000000,  // MinAddress
                        0x804000001037,  // MaxAddress
                        0,               // AddressTranslation
                        0x1038)          // AddressLength

          QWordMemory ( ResourceConsumer,// ResourceUsage
                        PosDecode,       // Decode
                        MinFixed,        // MinType
                        MaxFixed,        // MaxType
                        NonCacheable,    // MemType
                        ReadWrite,       // ReadWriteType
                        0,               // AddressGranularity
                        0x804010000000,  // MinAddress
                        0x804010000007,  // MaxAddress
                        0,               // AddressTranslation
                        0x8)             // AddressLength

          QWordMemory ( ResourceConsumer,// ResourceUsage
                        PosDecode,       // Decode
                        MinFixed,        // MinType
                        MaxFixed,        // MaxType
                        NonCacheable,    // MemType
                        ReadWrite,       // ReadWriteType
                        0,               // AddressGranularity
                        0x804000002000,  // MinAddress
                        0x804000004027,  // MaxAddress
                        0,               // AddressTranslation
                        0x2028)          // AddressLength

          QWordMemory ( ResourceConsumer,// ResourceUsage
            PosDecode,       // Decode
            MinFixed,        // MinType
            MaxFixed,        // MaxType
            NonCacheable,    // MemType
            ReadWrite,       // ReadWriteType
            0,               // AddressGranularity
            0x804000008000,  // MinAddress
            0x804000008237,  // MaxAddress
            0,               // AddressTranslation
            0x238)           // AddressLength

          Interrupt(ResourceConsumer, Edge, ActiveHigh, Exclusive) { 0x7A }
        })

        Name (_DSD, Package() {
            ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
            Package () {
                Package () { "compatible", "marvell,cn10-xspi-nor"},
                Package () { "reg", 0x8040},
            }
        })
      } // SPI0
2024-07-29 17:03:16 +01:00
Mark Brown
50ac44c768 Add support for AD4000 series of ADCs
Merge series from Marcelo Schmitt <marcelo.schmitt@analog.com>:

This patch series extends the SPI bitbang, gpio, and spi-engine controllers to
support configurable MOSI line idle states.
It then introduces the ad4000 driver which uses the MOSI idle configuration to
provide improved support for the AD4000 series of ADCs.
Documentation is added describing the new extension to the SPI protocol.
The currently supported wiring modes for AD4000 devices were documented under
IIO documentation directory.

Change log v6 -> v7:
[Device tree]
No changes to device tree from v6 to v7.
[SPI]
spi.c: Removed blank line added in code not related to MOSI idle feature.
spi: bitbang: Rewrapped commit message.
spi: bitbang: Rebased bitbang patch on top of spi for-next branch.
[IIO]
ad4000: Checked gain-milli read from dt and made it match one of supported gains or fail.
ad4000: Added blank lines to improve code readability.
ad4000: return 0; when known that no errors occurred.

Link to v6: https://lore.kernel.org/linux-iio/cover.1719686465.git.marcelo.schmitt@analog.com/
Link to v5: https://lore.kernel.org/linux-iio/cover.1719351923.git.marcelo.schmitt@analog.com/
Link to v4: https://lore.kernel.org/linux-iio/cover.1718749981.git.marcelo.schmitt@analog.com/
Link to v3: https://lore.kernel.org/linux-iio/cover.1717539384.git.marcelo.schmitt@analog.com/
Link to v2: https://lore.kernel.org/linux-iio/cover.1712585500.git.marcelo.schmitt@analog.com/
Link to v1: https://lore.kernel.org/linux-iio/cover.1711131830.git.marcelo.schmitt@analog.com/

Prerequisite patches to apply this series to IIO testing branch:

c3358a746e "spi: bitbang: Convert unsigned to unsigned int"
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git/commit/?id=c3358a746e078d0f9048732c90fdab4f37c00e0d

f261172d39 "spi: bitbang: Use typedef for txrx_*() callbacks"
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git/commit/?id=f261172d39f358dcecce13c310690d3937e0cca6

6ecdb0aa4d "spi: axi-spi-engine: Add SPI_CS_HIGH support"
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git/commit/?h=for-6.11&id=6ecdb0aa4dca62d236a659426e11e6cf302e8f18

Prerequisite patches to apply the series to SPI for-next brach:

ef60f9ca26 "docs: iio: add documentation for adis16480 driver"
https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?h=testing&id=ef60f9ca26d33d0f8e1a709771c61d3e96f64559

Thanks,
Marcelo

Marcelo Schmitt (7):
  spi: Enable controllers to extend the SPI protocol with MOSI idle
    configuration
  spi: bitbang: Implement support for MOSI idle state configuration
  spi: spi-gpio: Add support for MOSI idle state configuration
  spi: spi-axi-spi-engine: Add support for MOSI idle configuration
  dt-bindings: iio: adc: Add AD4000
  iio: adc: Add support for AD4000
  Documentation: Add AD4000 documentation

 .../bindings/iio/adc/adi,ad4000.yaml          | 197 +++++
 Documentation/iio/ad4000.rst                  | 131 ++++
 Documentation/iio/index.rst                   |   1 +
 Documentation/spi/spi-summary.rst             |  83 ++
 MAINTAINERS                                   |   9 +
 drivers/iio/adc/Kconfig                       |  12 +
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/ad4000.c                      | 722 ++++++++++++++++++
 drivers/spi/spi-axi-spi-engine.c              |  15 +-
 drivers/spi/spi-bitbang.c                     |  24 +
 drivers/spi/spi-gpio.c                        |  12 +-
 drivers/spi/spi.c                             |   6 +
 include/linux/spi/spi_bitbang.h               |   1 +
 include/uapi/linux/spi/spi.h                  |   5 +-
 14 files changed, 1213 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
 create mode 100644 Documentation/iio/ad4000.rst
 create mode 100644 drivers/iio/adc/ad4000.c

base-commit: 986da024b99a72e64f6bdb3f3f0e52af024b1f50
prerequisite-patch-id: 76a35c35c2af889be2ff20052da02df561b3d71b
prerequisite-patch-id: ce5abb83d4f04e72c69d0df4ded79077065cd649
prerequisite-patch-id: b30f54a92e47dbad33ca7450089c7b19610e9cf2
--
2.43.0
2024-07-29 16:48:44 +01:00
AngeloGioacchino Del Regno
5972eb05ca spi: spi-mt65xx: Use threaded interrupt for non-SPIMEM transfer
In order to avoid blocking for an excessive amount of time, eventually
impacting on system responsiveness, interrupt handlers should finish
executing in as little time as possible.

Use threaded interrupt and move the SPI transfer handling (both
CPU and DMA) for the non-spimem case to an interrupt thread instead.

For SPI-MEM (IPM) controllers, handling is kept in the blocking
interrupt as it simply consists in signalling completion.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20240726114721.142196-1-angelogioacchino.delregno@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:23:25 +01:00
Chen Ni
dc58d15ae7 spi: meson-spicc: convert comma to semicolon
Replace a comma between expression statements by a semicolon.

Fixes: 3e0cf4d3fc ("spi: meson-spicc: add a linear clock divider support")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20240716091151.1434450-1-nichen@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:23:24 +01:00
Ma Ke
0f245463b0 spi: ppc4xx: handle irq_of_parse_and_map() errors
Zero and negative number is not a valid IRQ for in-kernel code and the
irq_of_parse_and_map() function returns zero on error.  So this check for
valid IRQs should only accept values > 0.

Fixes: 44dab88e7c ("spi: add spi_ppc4xx driver")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://patch.msgid.link/20240724084047.1506084-1-make24@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:23:23 +01:00
David Lechner
f8918ef126 spi: axi-spi-engine: don't emit XFER_BITS for empty xfer
This adds a check on xfer->len to avoid emitting an XFER_BITS
instruction for empty transfers in the AXI SPI Engine driver. This
avoids unnecessary delays caused by executing an instruction that has
no effect on the actual SPI transfer.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240723-spi-axi-spi-engine-opt-bpw-v1-1-2625ba4c4387@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:23:21 +01:00
Marcelo Schmitt
a62073f4b2 spi: spi-axi-spi-engine: Add support for MOSI idle configuration
Implement MOSI idle low and MOSI idle high to better support peripherals
that request specific MOSI behavior.

Acked-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/f237166c7bbe0a1cdabce243b97484bf2f428143.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:54 +01:00
Marcelo Schmitt
927d382c7e spi: spi-gpio: Add support for MOSI idle state configuration
Implement MOSI idle low and MOSI idle high to better support peripherals
that request specific MOSI behavior.

Acked-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/629c55a10005ba26825c3a6a19184372ef81b3e1.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:53 +01:00
Marcelo Schmitt
320f669309 spi: bitbang: Implement support for MOSI idle state configuration
Some SPI peripherals may require strict MOSI line state when the controller
is not clocking out data. Implement support for MOSI idle state
configuration (low or high) by setting the data output line level on
controller setup and after transfers. Bitbang operations now call
controller specific set_mosi_idle() callback to set MOSI to its idle state.
The MOSI line is kept at its idle state if no tx buffer is provided.

Acked-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/de61a600b56ed9cb714d5ea87afa88948e70041e.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:52 +01:00
Marcelo Schmitt
f58872f45c spi: Enable controllers to extend the SPI protocol with MOSI idle configuration
The behavior of an SPI controller data output line (SDO or MOSI or COPI
(Controller Output Peripheral Input) for disambiguation) is usually not
specified when the controller is not clocking out data on SCLK edges.
However, there do exist SPI peripherals that require specific MOSI line
state when data is not being clocked out of the controller.

Conventional SPI controllers may set the MOSI line on SCLK edges then bring
it low when no data is going out or leave the line the state of the last
transfer bit. More elaborated controllers are capable to set the MOSI idle
state according to different configurable levels and thus are more suitable
for interfacing with demanding peripherals.

Add SPI mode bits to allow peripherals to request explicit MOSI idle state
when needed.

When supporting a particular MOSI idle configuration, the data output line
state is expected to remain at the configured level when the controller is
not clocking out data. When a device that needs a specific MOSI idle state
is identified, its driver should request the MOSI idle configuration by
setting the proper SPI mode bit.

Acked-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Tested-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/9802160b5e5baed7f83ee43ac819cb757a19be55.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:51 +01:00
Witold Sadowski
9cabf4a487 spi: cadence: Try to read spi-tx/rx-bus width property using ACPI
Try to read bus width property using acpi_dev_get_property function, do
not rely on spi_mem_default_supports_op function only.
If of_device_get_match_data() will fail, retry with
acpi_device_get_match_data() to handle ACPI properly.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Signed-off-by: Piyush Malgujar <pmalgujar@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-10-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:32 +01:00
Witold Sadowski
8232f1e258 spi: cadence: Change cs property reading.
In current implementation cs property can be read only from
device-tree(for_each_available_child_of_node_scoped). Change it to fwnode
based read to allow property reading in ACPI case too.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Signed-off-by: Piyush Malgujar <pmalgujar@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-9-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:31 +01:00
Witold Sadowski
4b8cb7dcd8 spi: cadence: Change resource mapping
If mapping resource by name will fail try to map resource by number.
Such situation can occur in ACPI case.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Signed-off-by: Piyush Malgujar <pmalgujar@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-8-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:30 +01:00
Witold Sadowski
931e389ded spi: cadence: Add Marvell xfer operation support
Marvell Xfer overlay extends xSPI capabilities to support non-memory SPI
operations. The Marvell overlay, combined with a generic command, allows
for full-duplex SPI transactions. It also enables transactions with
undetermined lengths using the cs_hold parameter and the ability to
extend CS signal assertion, even if the xSPI block requests CS signal
de-assertion.
Marvell overlay is using part of xSPI for writing data into device, and
additional hardware block to read data from the device. To do that xSPI
will trigger 1 byte generic command followed by data sequence. In same
time overlay block will monitor MISO pin to read data from the device.
Due to that SDMA data start will be shifted by 1 byte.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-7-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:29 +01:00
Witold Sadowski
fa7279acef spi: cadence: Add Marvell xSPI interrupt changes
It is possible that before enabling interrupt, interrupt bit will be
set. It might cause improper IRQ handler behaviour. To fix it, clear
interrupt bit before enabling interrupts. That behaviour is specific to
Marvell xSPI implementation.
In addition in Marvell xSPI interrupt must be cleared in two places -
xSPI itself, and Marvell overlay.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-6-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:28 +01:00
Witold Sadowski
75128e2a14 spi: cadence: Add Marvell SDMA operations
In Marvell xSPI implementation any access to SDMA register will result
in 8 byte SPI data transfer. Reading less data(eg. 1B) will result in
losing remaining bytes. To avoid that read/write 8 bytes into temporary
buffer, and read/write whole temporary buffer into SDMA.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-5-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:27 +01:00
Witold Sadowski
26d34fdc49 spi: cadence: Add clock configuration for Marvell xSPI overlay
Add support for clock divider. Divider block can disable, enable and
divide clock signal. Only 14 different divide ratios are avalible, from
6.25 up to 200MHz. For calculations use default Marvell system clock
value(800MHz).

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-4-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:26 +01:00
Witold Sadowski
b0d06169a7 spi: cadence: Add static PHY configuration in Marvell overlay
This commit adds support for static PHY configuration of Cadence xSPI
block. Configuration will be applied only if Marvell overlay compatible
string will be detected. Configuration is static over the whole
frequency range.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-3-wsadowski@marvell.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-29 01:19:25 +01:00
Linus Torvalds
ab11658f26 Merge tag 'spi-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
 "The bulk of this is a series of fixes for the microchip-core driver
  mostly originating from one of their customers, I also applied an
  additional patch adding support for controlling the word size which
  came along with it since it's still the merge window and clearly had a
  bunch of fairly thorough testing.

  We also have a fix for the compatible used to bind spidev to the
  BH2228FV"

* tag 'spi-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spidev: add correct compatible for Rohm BH2228FV
  dt-bindings: trivial-devices: fix Rohm BH2228FV compatible string
  spi: microchip-core: add support for word sizes of 1 to 32 bits
  spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
  spi: microchip-core: fix init function not setting the master and motorola modes
  spi: microchip-core: only disable SPI controller when register value change requires it
  spi: microchip-core: defer asserting chip select until just before write to TX FIFO
  spi: microchip-core: fix the issues in the isr
2024-07-27 12:29:10 -07:00
Linus Torvalds
c2a96b7f18 Merge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
 "Here is the big set of driver core changes for 6.11-rc1.

  Lots of stuff in here, with not a huge diffstat, but apis are evolving
  which required lots of files to be touched. Highlights of the changes
  in here are:

   - platform remove callback api final fixups (Uwe took many releases
     to get here, finally!)

   - Rust bindings for basic firmware apis and initial driver-core
     interactions.

     It's not all that useful for a "write a whole driver in rust" type
     of thing, but the firmware bindings do help out the phy rust
     drivers, and the driver core bindings give a solid base on which
     others can start their work.

     There is still a long way to go here before we have a multitude of
     rust drivers being added, but it's a great first step.

   - driver core const api changes.

     This reached across all bus types, and there are some fix-ups for
     some not-common bus types that linux-next and 0-day testing shook
     out.

     This work is being done to help make the rust bindings more safe,
     as well as the C code, moving toward the end-goal of allowing us to
     put driver structures into read-only memory. We aren't there yet,
     but are getting closer.

   - minor devres cleanups and fixes found by code inspection

   - arch_topology minor changes

   - other minor driver core cleanups

  All of these have been in linux-next for a very long time with no
  reported problems"

* tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
  ARM: sa1100: make match function take a const pointer
  sysfs/cpu: Make crash_hotplug attribute world-readable
  dio: Have dio_bus_match() callback take a const *
  zorro: make match function take a const pointer
  driver core: module: make module_[add|remove]_driver take a const *
  driver core: make driver_find_device() take a const *
  driver core: make driver_[create|remove]_file take a const *
  firmware_loader: fix soundness issue in `request_internal`
  firmware_loader: annotate doctests as `no_run`
  devres: Correct code style for functions that return a pointer type
  devres: Initialize an uninitialized struct member
  devres: Fix memory leakage caused by driver API devm_free_percpu()
  devres: Fix devm_krealloc() wasting memory
  driver core: platform: Switch to use kmemdup_array()
  driver core: have match() callback in struct bus_type take a const *
  MAINTAINERS: add Rust device abstractions to DRIVER CORE
  device: rust: improve safety comments
  MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer
  MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER
  firmware: rust: improve safety comments
  ...
2024-07-25 10:42:22 -07:00
Linus Torvalds
acc5965b9f Merge tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc and other driver updates from Greg KH:
 "Here is the "big" set of char/misc and other driver subsystem changes
  for 6.11-rc1. Nothing major in here, just loads of new drivers and
  updates. Included in here are:

   - IIO api updates and new drivers added

   - wait_interruptable_timeout() api cleanups for some drivers

   - MODULE_DESCRIPTION() additions for loads of drivers

   - parport out-of-bounds fix

   - interconnect driver updates and additions

   - mhi driver updates and additions

   - w1 driver fixes

   - binder speedups and fixes

   - eeprom driver updates

   - coresight driver updates

   - counter driver update

   - new misc driver additions

   - other minor api updates

  All of these, EXCEPT for the final Kconfig build fix for 32bit
  systems, have been in linux-next for a while with no reported issues.
  The Kconfig fixup went in 29 hours ago, so might have missed the
  latest linux-next, but was acked by everyone involved"

* tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (330 commits)
  misc: Kconfig: exclude mrvl-cn10k-dpi compilation for 32-bit systems
  misc: delete Makefile.rej
  binder: fix hang of unregistered readers
  misc: Kconfig: add a new dependency for MARVELL_CN10K_DPI
  virtio: add missing MODULE_DESCRIPTION() macro
  agp: uninorth: add missing MODULE_DESCRIPTION() macro
  spmi: add missing MODULE_DESCRIPTION() macros
  dev/parport: fix the array out-of-bounds risk
  samples: configfs: add missing MODULE_DESCRIPTION() macro
  misc: mrvl-cn10k-dpi: add Octeon CN10K DPI administrative driver
  misc: keba: Fix missing AUXILIARY_BUS dependency
  slimbus: Fix struct and documentation alignment in stream.c
  MAINTAINERS: CC dri-devel list on Qualcomm FastRPC patches
  misc: fastrpc: use coherent pool for untranslated Compute Banks
  misc: fastrpc: support complete DMA pool access to the DSP
  misc: fastrpc: add missing MODULE_DESCRIPTION() macro
  misc: fastrpc: Add missing dev_err newlines
  misc: fastrpc: Use memdup_user()
  nvmem: core: Implement force_ro sysfs attribute
  nvmem: Use sysfs_emit() for type attribute
  ...
2024-07-19 15:55:08 -07:00
Conor Dooley
fc28d1c1fe spi: spidev: add correct compatible for Rohm BH2228FV
When Maxime originally added the BH2228FV to the spidev driver, he spelt
it incorrectly - the d should have been a b. Add the correctly spelt
compatible to the driver. Although the majority of users of this
compatible are abusers, there is at least one board that validly uses
the incorrect spelt compatible, so keep it in the driver to avoid
breaking the few real users it has.

Fixes: 8fad805bdc ("spi: spidev: Add Rohm DH2228FV DAC compatible string")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20240717-ventricle-strewn-a7678c509e85@spud
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-18 11:17:09 +01:00
Linus Torvalds
e23dd95cfd Merge tag 'spi-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
 "There's some quite exciting core work in this release, we've got the
  beginnings of support for hardware initiated transfers which is itself
  independently useful for optimising fast paths in existing drivers.

  We also have a rework of the DMA mapping which allows finer grained
  decisions about DMA mapping messages and also helps remove some bodges
  that we'd had.

  Otherwise it's a fairly quiet release, a few new drivers and features
  for existing drivers, together with various cleanups and DT binding
  conversions.

  One regmap SPI fix made it's way in here too which I should probably
  have sent as a regmap fix instead.

  Summary:

   - Support for pre-optimising messages, reducing the overhead for
     messages that are repeatedly used (eg, reading the interrupt status
     from a device). This will also be used for hardware initiated
     transfers in future.

   - A reworking of how DMA mapping is done, introducing a new helper
     and allowing the DMA mapping decision to be done per transfer
     instead of per message.

   - Support for Atmel SAMA7D64, Freescale LX2160A DSPI and WCH CH341A"

* tag 'spi-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (72 commits)
  spi: dt-bindings: at91: Add sama7d65 compatible string
  spi: add ch341a usb2spi driver
  spi: dt-bindings: fsl-dspi: add compatible string 'fsl,lx2160a-dspi'
  spi: dt-bindings: fsl-dspi: add dmas and dma-names properties
  spi: spi: Remove unnecessary ‘0’ values from status
  spi: spi: Remove unnecessary ‘0’ values from rc
  spi: xcomm: fix coding style
  spi: xcomm: remove i2c_set_clientdata()
  spi: xcomm: make use of devm_spi_alloc_host()
  spi: xcomm: add gpiochip support
  spi: dt-bindings: snps,dw-apb-ssi.yaml: update compatible property
  spi: dt-bindings: fsl-dspi: Convert to yaml format
  spi: fsl-dspi: use common proptery 'spi-cs-setup(hold)-delay-ns'
  spi: axi-spi-engine: remove platform_set_drvdata()
  spi: spi-fsl-lpspi: Pass pm_ptr()
  spi: spi-imx: Pass pm_ptr()
  spi: spi-fsl-lpspi: Switch to SYSTEM_SLEEP_PM_OPS()
  spi: spi-imx: Switch to RUNTIME_PM_OPS/SYSTEM_SLEEP_PM_OPS()
  spi: add EXPORT_SYMBOL_GPL(devm_spi_optimize_message)
  spi: add devm_spi_optimize_message() helper
  ...
2024-07-15 18:03:43 -07:00
Steve Wilkins
87232ea8a5 spi: microchip-core: add support for word sizes of 1 to 32 bits
The current implementation only supports a word size of 8 bits,
which limits the devices it can be used with. Add support for any
word size between 1 and 32 bits, as supported by the hardware.

Signed-off-by: Steve Wilkins <steve.wilkins@raymarine.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240715-cogwheel-uniquely-0d4ef518b809@wendy
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-15 19:08:20 +01:00
Steve Wilkins
9cf71eb0fa spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
While transmitting with rx_len == 0, the RX FIFO is not going to be
emptied in the interrupt handler. A subsequent transfer could then
read crap from the previous transfer out of the RX FIFO into the
start RX buffer. The core provides a register that will empty the RX and
TX FIFOs, so do that before each transfer.

Fixes: 9ac8d17694 ("spi: add support for microchip fpga spi controllers")
Signed-off-by: Steve Wilkins <steve.wilkins@raymarine.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240715-flammable-provoke-459226d08e70@wendy
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-15 19:08:19 +01:00
Steve Wilkins
3a5e762836 spi: microchip-core: fix init function not setting the master and motorola modes
mchp_corespi_init() reads the CONTROL register, sets the master and
motorola bits, but doesn't write the value back to the register. The
function also doesn't ensure the controller is disabled at the start,
which may present a problem if the controller was used by an
earlier boot stage as some settings (including the mode) can only be
modified while the controller is disabled.

Fixes: 9ac8d17694 ("spi: add support for microchip fpga spi controllers")
Signed-off-by: Steve Wilkins <steve.wilkins@raymarine.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240715-designing-thus-05f7c26e1da7@wendy
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-15 19:08:18 +01:00
Steve Wilkins
de9850b5c6 spi: microchip-core: only disable SPI controller when register value change requires it
Setting up many of the registers for a new SPI transfer involves
unconditionally disabling the SPI controller, writing the register
value and re-enabling the controller. This is being done for registers
even when the value is unchanged and is also done for registers that
don't require the controller to be disabled for the change to take
effect. Make an effort to detect changes to the register values, and
only disables the controller if the new register value is different
and disabling the controller is required. This stops the controller
being repeated disabled and the bus going tristate before every
transfer.

Fixes: 9ac8d17694 ("spi: add support for microchip fpga spi controllers")
Signed-off-by: Steve Wilkins <steve.wilkins@raymarine.com>
Co-developed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240715-depict-twirl-7e592eeabaad@wendy
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-15 19:08:17 +01:00
Steve Wilkins
22fd98c107 spi: microchip-core: defer asserting chip select until just before write to TX FIFO
Setting up many of the registers for a new SPI transfer requires the
SPI controller to be disabled after set_cs() has been called to assert
the chip select line. However, disabling the controller results in the
SCLK and MOSI output pins being tristate, which can cause clock
transitions to be seen by a slave device whilst SS is active. To fix
this, the CS is only set to inactive inline, whilst setting it active
is deferred until all registers are set up and the any controller
disables have been completed.

Fixes: 9ac8d17694 ("spi: add support for microchip fpga spi controllers")
Signed-off-by: Steve Wilkins <steve.wilkins@raymarine.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240715-sanitizer-recant-dd96b7a97048@wendy
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-15 19:08:16 +01:00
Naga Sureshkumar Relli
502a582b8d spi: microchip-core: fix the issues in the isr
It is possible for the TXDONE interrupt be raised if the tx FIFO becomes
temporarily empty while transmitting, resulting in recursive calls to
mchp_corespi_write_fifo() and therefore a garbage message might be
transmitted depending on when the interrupt is triggered. Moving all of
the tx FIFO writes out of the TXDONE portion of the interrupt handler
avoids this problem.

Most of rest of the TXDONE portion of the handler is problematic too.
Only reading the rx FIFO (and finalising the transfer) when the TXDONE
interrupt is raised can cause the transfer to stall, if the final bytes
of rx data are not available in the rx FIFO when the final TXDONE
interrupt is raised. The transfer should be finalised regardless of
which interrupt is raised, provided that all tx data has been set and
all rx data received.

The first issue was encountered "in the wild", the second is
theoretical.

Fixes: 9ac8d17694 ("spi: add support for microchip fpga spi controllers")
Signed-off-by: Naga Sureshkumar Relli <nagasuresh.relli@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240715-candied-deforest-585685ef3c8a@wendy
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-15 19:08:15 +01:00
David Lechner
c8bd922d92 spi: mux: set ctlr->bits_per_word_mask
Like other SPI controller flags, bits_per_word_mask may be used by a
peripheral driver, so it needs to reflect the capabilities of the
underlying controller.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20240708-spi-mux-fix-v1-3-6c8845193128@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-09 17:42:33 +01:00
David Lechner
ca52aa4c60 spi: add defer_optimize_message controller flag
Adding spi_optimize_message() broke the spi-mux driver because it
calls spi_async() from it's transfer_one_message() callback. This
resulted in passing an incorrectly optimized message to the controller.
For example, if the underlying controller has an optimize_message()
callback, this would have not been called and can cause a crash when
the underlying controller driver tries to transfer the message.

Also, since the spi-mux driver swaps out the controller pointer by
replacing msg->spi, __spi_unoptimize_message() was being called with a
different controller than the one used in __spi_optimize_message(). This
could cause a crash when attempting to free the message resources when
__spi_unoptimize_message() is called in spi_finalize_current_message()
since it is being called with a controller that did not allocate the
resources.

This is fixed by adding a defer_optimize_message flag for controllers.
This flag causes all of the spi_[maybe_][un]optimize_message() calls to
be a no-op (other than attaching a pointer to the spi device to the
message).

This allows the spi-mux driver to pass an unmodified message to
spi_async() in spi_mux_transfer_one_message() after the spi device has
been swapped out. This causes __spi_optimize_message() and
__spi_unoptimize_message() to be called only once per message and with
the correct/same controller in each case.

Reported-by: Oleksij Rempel <o.rempel@pengutronix.de>
Closes: https://lore.kernel.org/linux-spi/Zn6HMrYG2b7epUxT@pengutronix.de/
Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Closes: https://lore.kernel.org/linux-spi/20240628-awesome-discerning-bear-1621f9-mkl@pengutronix.de/
Fixes: 7b1d87af14 ("spi: add spi_optimize_message() APIs")
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20240708-spi-mux-fix-v1-2-6c8845193128@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-09 17:42:32 +01:00
David Lechner
c86a918b1b spi: don't unoptimize message in spi_async()
Calling spi_maybe_unoptimize_message() in spi_async() is wrong because
the message is likely to be in the queue and not transferred yet. This
can corrupt the message while it is being used by the controller driver.

spi_maybe_unoptimize_message() is already called in the correct place
in spi_finalize_current_message() to balance the call to
spi_maybe_optimize_message() in spi_async().

Fixes: 7b1d87af14 ("spi: add spi_optimize_message() APIs")
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20240708-spi-mux-fix-v1-1-6c8845193128@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-09 17:42:31 +01:00
Johannes Thumshirn
8846739f52 spi: add ch341a usb2spi driver
Add a driver for the QiHeng Electronics ch341a USB-to-SPI adapter.

This driver is loosely based on the ch341a module from the flashrom project.

Signed-off-by: Johannes Thumshirn <jth@kernel.org>
Link: https://patch.msgid.link/20240708-spi-ch341a-v3-1-cf7f9b2c1e31@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-08 17:01:10 +01:00
Li zeming
3bca1a3808 spi: spi: Remove unnecessary ‘0’ values from status
status is assigned first, so it does not need to initialize the assignment.

Signed-off-by: Li zeming <zeming@nfschina.com>
Link: https://patch.msgid.link/20240708041411.14424-1-zeming@nfschina.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-08 12:50:28 +01:00
Li zeming
0f2ecc3f61 spi: spi: Remove unnecessary ‘0’ values from rc
rc is assigned first, so it does not need to initialize the assignment.

Signed-off-by: Li zeming <zeming@nfschina.com>
Link: https://patch.msgid.link/20240708035320.14241-1-zeming@nfschina.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-08 12:50:27 +01:00
Nuno Sa
e2e89f9630 spi: xcomm: fix coding style
Just cosmetics. No functional change intended.

While at it, removed a couple of redundant else if() statements.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240705-dev-spi-xcomm-gpiochip-v2-4-b10842fc9636@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-05 18:47:46 +01:00
Nuno Sa
5e7d4755c5 spi: xcomm: remove i2c_set_clientdata()
i2c_get_clientdata() is not being called anywhere so that we do not need
to set clientdata.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240705-dev-spi-xcomm-gpiochip-v2-3-b10842fc9636@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-05 18:47:45 +01:00
Nuno Sa
e8ba259764 spi: xcomm: make use of devm_spi_alloc_host()
Use devm_spi_alloc_host() so that there's no need to call
spi_controller_put() in the error path.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240705-dev-spi-xcomm-gpiochip-v2-2-b10842fc9636@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-05 18:47:44 +01:00
Michael Hennerich
5211070c33 spi: xcomm: add gpiochip support
The hardware can expose one pin as a GPO. Hence, register a simple
gpiochip to support it.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Co-developed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240705-dev-spi-xcomm-gpiochip-v2-1-b10842fc9636@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-05 18:47:43 +01:00
Mark Brown
8221545c44 spi: omap2-mcspi: Revert multi mode support
There have been multiple reports that the multi-mode support in the
OMAP2 McSPI driver has caused regressions on existing systems.  There's
been some discussion and some proposed changes but nothing that's been
tested by all the reporters.  Drop the patch for v6.10, hopefully we can
get to the bottom of the issue and reenable the feature for v6.11.

Reported-by: Colin Foster <colin.foster@in-advantage.com>
Reported-by: João Paulo Gonçalves <jpaulo.silvagoncalves@gmail.com>
Fixes: e64d3b6fc9 ("spi: omap2-mcpsi: Enable MULTI-mode in more situations")
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20240704-spi-revert-omap2-multi-v1-1-69357ef13fdc@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-04 16:02:09 +01:00
Greg Kroah-Hartman
14c4dc8bb6 Merge tag 'iio-for-6.11b' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next
Jonathan writes:

IIO: 2nd set of new device support, features and cleanup for 6.11

The big one here is we finally have Paul Cercueil's (and others)
DMA buffer support for IIO devices enabling high speed zero
copy transfer of data to and from sensors supported by IIO (and for
example USB).  This should aid with upstream support of a range of
higher performance ADCs and DACs.

Two merges from other trees
- spi/spi_devm_optimize used for simplification in ad7944.
- dmaengine/topic_dma_vec to enable the DMABUF series.

One feature with impact outside IIO.
- Richer set of dev_err_probe() like helpers to cover ERR_PTR() cases.

New device support
==================
adi,ad7173
- Add support for AD4111, AD4112, AD4114, AD4115 and ADC4116 pseudo
  differential ADCs. Major driver rework was needed to enabled these.
adi,ad7944
- Use devm_spi_optimize_message() to avoid a local devm cleanup
  callback. This is the example case from the patch set, others will
  follow.
mediatek,mt6359-auxadc
- New driver for this ADC IP found in MT6357, MT6358 and MT6359 PMICs.
st,accel
- Add support for the LIS2DS12 accelerometer
ti,ads1119
- New driver for this 16 bit 2-differential or 4-single ended channel
  ADC.

Features
========
dt-bindings
- Introduce new common-mode-channel property to help handle pseudo
  differential ADCs where we have something that looks like one side
  of differential input, but which is only suited for use with a
  slow moving reference.
adi,adf4350
- Support use as a clock provider.
iio-hmwon
- Support reading of labels from IIO devices by their consumers and
  use this in the hwmon bridge.

Cleanup and minor fixes
=======================
Treewide
- Use regmap_clear_bits() / regmap_set_bits() to simplify open coded
  equivalents.
- Use devm_regulator_get_enable_read_voltage() to replace equivalent
  opencoded boilerplate. In some cases enabled complete conversion to
  devm handling and removal of explicit remove() callbacks.
- Introduce dev_err_ptr_probe() and other variants and make use of
  of them in a couple of examples driver cleanups. Will find use in
  many more drivers soon.
adi,ad7192
- Introduce local struct device *dev and use dev_err_probe() to give
  more readable code.
adi,adi-axi-adc/dac
- Improved consistency of messages using dev_err_probe()
adi,adis
- Split the trigger handling into cases that needed paging and those that
  don't resulting in more readable code.
- Use cleanup.h to simplify error paths via scoped cleanup.
- Add adis specific lock helpers and make use of them in a number of drivers.
adi,ad7192
- Update maintainer (Alisa-Dariana Roman)
adi,ad7606
- dt-binding cleanup.
avago,apds9306
- Add a maintainer entry (Subhajit Ghosh)
linear,ltc2309
- Fix a wrong endian type.
st,stm32-dfsdm
- Fix a missing port property in the dt-binding.
st,sensors
- Relax whoami match failure to a warning print rather than probe failure.
  This enables fallback compatibles to existing parts from those that don't
  necessarily even exit yet.

* tag 'iio-for-6.11b' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (112 commits)
  iio: adc: ad7173: Fix uninitialized symbol is_current_chan
  iio: adc: Add support for MediaTek MT6357/8/9 Auxiliary ADC
  math.h: Add unsigned 8 bits fractional numbers type
  dt-bindings: iio: adc: Add MediaTek MT6359 PMIC AUXADC
  iio: common: scmi_iio: convert to dev_err_probe()
  iio: backend: make use of dev_err_cast_probe()
  iio: temperature: ltc2983: convert to dev_err_probe()
  dev_printk: add new dev_err_probe() helpers
  iio: xilinx-ams: Add labels
  iio: adc: ad7944: use devm_spi_optimize_message()
  Documentation: iio: Document high-speed DMABUF based API
  iio: buffer-dmaengine: Support new DMABUF based userspace API
  iio: buffer-dma: Enable support for DMABUFs
  iio: core: Add new DMABUF interface infrastructure
  MAINTAINERS: Update AD7192 driver maintainer
  iio: adc: ad7192: use devm_regulator_get_enable_read_voltage
  iio: st_sensors: relax WhoAmI check in st_sensors_verify_id()
  MAINTAINERS: Add AVAGO APDS9306
  dt-bindings: iio: adc: adi,ad7606: comment and sort the compatible names
  dt-bindings: iio: adc: adi,ad7606: add missing datasheet link
  ...
2024-07-04 11:04:20 +02:00
Dr. David Alan Gilbert
dfd19866d1 parport: Remove parport_driver.devmodel
'devmodel' hasn't actually been used since:
  'commit 3275158fa5 ("parport: remove use of devmodel")'
and everyone now has it set to true and has been fixed up; remove
the flag.

(There are still comments all over about it)

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Acked-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lore.kernel.org/r/20240502154823.67235-4-linux@treblig.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-03 16:44:22 +02:00
Greg Kroah-Hartman
d69d804845 driver core: have match() callback in struct bus_type take a const *
In the match() callback, the struct device_driver * should not be
changed, so change the function callback to be a const *.  This is one
step of many towards making the driver core safe to have struct
device_driver in read-only memory.

Because the match() callback is in all busses, all busses are modified
to handle this properly.  This does entail switching some container_of()
calls to container_of_const() to properly handle the constant *.

For some busses, like PCI and USB and HV, the const * is cast away in
the match callback as those busses do want to modify those structures at
this point in time (they have a local lock in the driver structure.)
That will have to be changed in the future if they wish to have their
struct device * in read-only-memory.

Cc: Rafael J. Wysocki <rafael@kernel.org>
Reviewed-by: Alex Elder <elder@kernel.org>
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-03 15:16:54 +02:00
Frank Li
52e78777b6 spi: fsl-dspi: use common proptery 'spi-cs-setup(hold)-delay-ns'
Use SPI common DT binding properties 'spi-cs-setup-delay-ns' and
'spi-cs-hold-delay-ns'. If these properties do not exist, fall back to
legacy 'fsl,spi-cs-sck-delay' and 'fsl,spi-sck-cs-delay'.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://patch.msgid.link/20240624-ls_qspi-v4-1-3d1c6f5005bf@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-01 13:12:42 +01:00
Bastien Curutchet
1762dc01fc spi: davinci: Unset POWERDOWN bit when releasing resources
On the OMAPL138, the SPI reference clock is provided by the Power and
Sleep Controller (PSC). The PSC's datasheet says that 'some peripherals
have special programming requirements and additional recommended steps
you must take before you can invoke the PSC module state transition'. I
didn't find more details in documentation but it appears that PSC needs
the SPI to clear the POWERDOWN bit before disabling the clock. Indeed,
when this bit is set, the PSC gets stuck in transitions from enable to
disable state.

Clear the POWERDOWN bit when releasing driver's resources

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
Link: https://patch.msgid.link/20240624071745.17409-1-bastien.curutchet@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-07-01 13:12:18 +01:00