03 May, 2019
2 commits
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The Hygon Dhyana CPU has the SMBus device with PCI device ID 0x790b,
which is the same as AMD CZ SMBus device. So add Hygon Dhyana support
to the i2c-piix4 driver by using the code path of AMD.Signed-off-by: Pu Wen
Reviewed-by: Jean Delvare
Signed-off-by: Wolfram Sang -
Mainly some pca954x work, i.e. removal of unused platform data support
and added support for sysfs interface for manipulating/examining the
idle state. And then a mechanical cocci-style patch.
25 Mar, 2019
1 commit
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MP2 controllers have two separate busses, so may accommodate up to two I2C
adapters. Those adapters are listed in the ACPI namespace with the
"AMDI0011" HID, and probed by a platform driver.Communication with the MP2 takes place through MMIO registers, or through
DMA for more than 32 bytes transfers.This is major rework of the patch submitted by Nehal-bakulchandra Shah from
AMD (https://patchwork.kernel.org/patch/10597369/).Most of the event handling of v3 was rewritten to make it work with more
than one bus (e.g on Ryzen-based Lenovo Yoga 530), and this version
contains many other improvements.Signed-off-by: Elie Morisse
Signed-off-by: Wolfram Sang
21 Mar, 2019
1 commit
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Add PCI ID for Intel Comet Lake PCH.
Signed-off-by: Jarkko Nikula
Reviewed-by: Jean Delvare
Signed-off-by: Wolfram Sang
23 Feb, 2019
2 commits
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Add a fault injector simulating a Kernel panic happening after starting
a transfer. Read the docs for its usage.Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang -
Add a fault injector simulating 'arbitration lost' from multi-master
setups. Read the docs for its usage.A helper function for future fault injectors using SCL interrupts is
created to achieve this.Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang
05 Feb, 2019
1 commit
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We don't use SPHINX currently in I2C documentation; but preparing the
I2C fault injector docs already is a good idea since it makes it easier
to read. Especially as new stuff is going to be added soon.Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang
09 Jan, 2019
1 commit
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A few drivers open code the handling of suspended adapters. It could be
handled by the core, though, to ensure generic handling. This patch adds
the flag and accessor functions. The usage of these helpers is optional,
though. See the kerneldoc in this patch. Using the new flag, we now
reject further transfers if the adapter is already marked suspended.Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang
10 Nov, 2018
1 commit
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Latest NVIDIA GPU card has USB Type-C interface. There is a
Type-C controller which can be accessed over I2C.This driver adds I2C bus driver to communicate with Type-C controller.
I2C client driver will be part of USB Type-C UCSI driver.Signed-off-by: Ajay Gupta
Reviewed-by: Andy Shevchenko
[wsa: kept Makefile sorting]
Signed-off-by: Wolfram Sang
31 Aug, 2018
1 commit
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a) rename to 'put' instead of 'release' to match 'get' when obtaining
the buffer
b) change the argument order to have the buffer as first argument
c) add a new argument telling the function if the message was
transferred. This allows the function to be used also in cases
where setting up DMA failed, so the buffer needs to be freed without
syncing to the message buffer.Also convert the only user.
Signed-off-by: Wolfram Sang
Reviewed-by: Niklas Söderlund
Signed-off-by: Wolfram Sang
24 Aug, 2018
1 commit
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The old @sunsite.dk address is no longer active, so update the references.
Signed-off-by: Peter Korsgaard
Signed-off-by: Wolfram Sang
04 Jul, 2018
4 commits
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Intel Ice Lake has the same SMBus host controller than Intel Cannon
Lake. Add the PCI ID to the drivers list of supported devices.Signed-off-by: Mika Westerberg
[jarkko.nikula@linux.intel.com: Add entries to Documentation and Kconfig]
Signed-off-by: Jarkko Nikula
Reviewed-by: Jean Delvare
Signed-off-by: Wolfram Sang -
Make list of supported chipsets a little bit shorter by consolidating
names that belong to the same family.Signed-off-by: Jarkko Nikula
Reviewed-by: Jean Delvare
Signed-off-by: Wolfram Sang -
Add another injector for an incomplete transfer. As mentioned in the
docs, this one is important to check bus recovery algorithms with it.
Otherwise random data may be sent to devices!Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang -
Make the incomplete_transfer routine reusable, so we can add other test
cases with different patterns later. Prepare the docs for that, too.Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang
14 Jun, 2018
1 commit
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Pull i2c updates from Wolfram Sang:
- mainly feature additions to drivers (stm32f7, qup, xlp9xx, mlxcpld, ...)
- conversion to use the i2c_8bit_addr_from_msg macro consistently
- move includes to platform_data
- core updates to allow the (still in review) I3C subsystem to connect
- and the regular share of smaller driver updates
* 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (68 commits)
i2c: qup: fix building without CONFIG_ACPI
i2c: tegra: Remove suspend-resume
i2c: imx-lpi2c: Switch to SPDX identifier
i2c: mxs: Switch to SPDX identifier
i2c: busses: make use of i2c_8bit_addr_from_msg
i2c: algos: make use of i2c_8bit_addr_from_msg
i2c: rcar: document R8A77980 bindings
i2c: qup: Add command-line parameter to override SCL frequency
i2c: qup: Correct duty cycle for FM and FM+
i2c: qup: Add support for Fast Mode Plus
i2c: qup: add probe path for Centriq ACPI devices
i2c: robotfuzz-osif: drop pointless test
i2c: robotfuzz-osif: remove pointless local variable
i2c: rk3x: Don't print visible virtual mapping MMIO address
i2c: opal: don't check number of messages in the driver
i2c: ibm_iic: don't check number of messages in the driver
i2c: imx: Switch to SPDX identifier
i2c: mux: pca954x: merge calls to of_match_device and of_device_get_match_data
i2c: mux: demux-pinctrl: use proper parent device for demux adapter
i2c: mux: improve error message for failed symlink
...
30 May, 2018
1 commit
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The URL is broken. This patch fixes it.
Signed-off-by: Federico Vaga
[wsa: shortened the URL a bit]
Signed-off-by: Wolfram Sang
17 May, 2018
3 commits
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This header only contains platform_data. Move it to the proper directory.
Signed-off-by: Wolfram Sang
Acked-by: Lee Jones -
This header only contains platform_data. Move it to the proper directory.
Signed-off-by: Wolfram Sang
Acked-by: Peter Korsgaard
30 Apr, 2018
1 commit
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It adds capability register description to documentation.
Signed-off-by: Michael Shych
Signed-off-by: Wolfram Sang
18 Apr, 2018
3 commits
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The example I2C code is rewritten to adopt the preferred kernel block
commenting style.Signed-off-by: Sam Hansen
Signed-off-by: Wolfram Sang -
Currently, Documentation/i2c/dev-interface describes the use of
i2c_smbus_* helper routines as static inlined functions provided by
linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file
in the i2c-tools project out into its own library. As a result, these
docs have become stale.This patch corrects the discrepancy and directs the reader to the
i2c-tools project for more information.Signed-off-by: Sam Hansen
Signed-off-by: Wolfram Sang -
This strips trailing whitespace in Documentation/i2c/dev-interface.
Signed-off-by: Sam Hansen
Signed-off-by: Wolfram Sang
21 Feb, 2018
1 commit
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Commits adding PCI IDs for Intel Braswell and Kaby Lake PCH-H lacked the
respective Kconfig and Documentation/i2c/busses/i2c-i801 change. Add
them now.Signed-off-by: Jarkko Nikula
Signed-off-by: Wolfram Sang
05 Feb, 2018
1 commit
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Pull i2c updates from Wolfram Sang:
"I2C has the following changes for you:- new flag to mark DMA safe buffers in i2c_msg. Also, some
infrastructure around it. And docs.- huge refactoring of the at24 driver led by the new maintainer
Bartosz- update I2C bus recovery to send STOP after recovery
- conversion from gpio to gpiod for I2C bus recovery
- adding a fault-injector to the i2c-gpio driver
- lots of small driver improvements, and bigger ones to
i2c-sh_mobile"* 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (99 commits)
i2c: mv64xxx: Add myself as maintainer for this driver
i2c: mv64xxx: Fix clock resource by adding an optional bus clock
i2c: mv64xxx: Remove useless test before clk_disable_unprepare
i2c: mxs: use true and false for boolean values
i2c: meson: update doc description to fix build warnings
i2c: meson: add configurable divider factors
dt-bindings: i2c: update documentation for the Meson-AXG
i2c: imx-lpi2c: add runtime pm support
i2c: rcar: fix some trivial typos in comments
i2c: davinci: fix the cpufreq transition
i2c: rk3x: add proper kerneldoc header
i2c: rk3x: account for const type of of_device_id.data
i2c: acorn: remove outdated path from file header
i2c: acorn: add MODULE_LICENSE tag
i2c: rcar: implement bus recovery
i2c: send STOP after successful bus recovery
i2c: ensure SDA is released in recovery if SDA is controllable
i2c: add 'set_sda' to bus_recovery_info
i2c: add identifier in declarations for i2c_bus_recovery
i2c: make kerneldoc about bus recovery more precise
...
22 Dec, 2017
1 commit
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`Documentation/i2c/dev-interface` gives examples for accessing i2c from
userspace.There's a note that warns developers about the two `i2c-dev.h` header
files which were shipped with the kernel and i2c-tools separately.However, following i2c-tools commits suggest that the header files are now
identical (in functionality) and `i2c_*` helper functions are now defined
in a separate header called `i2c/smbus.h`, which is distributed with
i2c-tools:commit 652619121974 ("Minimize differences with kernel flavor")
commit 93caf007f4cb ("Move SMBus helper functions to include/i2c/smbus.h")Thus, I've converted the warning paragraph into a historical note and
updated the suggested header files.Signed-off-by: Cengiz Can
Cc: Wolfram Sang
Signed-off-by: Jonathan Corbet
04 Dec, 2017
2 commits
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Reviewed-by: Jonathan Cameron
Reviewed-by: Mauro Carvalho Chehab
Signed-off-by: Wolfram Sang
Signed-off-by: Wolfram Sang -
Add fault injection capabilities to the i2c-gpio driver. When connected
to another I2C bus, it can create unusual states which the other I2C bus
master driver needs to handle. Only for debugging!Signed-off-by: Wolfram Sang
05 Oct, 2017
1 commit
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Add PCI ID for Intel Cedar Fork PCH.
Signed-off-by: Jarkko Nikula
Reviewed-by: Jean Delvare
Signed-off-by: Wolfram Sang
22 Aug, 2017
1 commit
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Specifically mention what drivers are mux-locked and parent-locked.
Signed-off-by: Peter Rosin
19 Jun, 2017
1 commit
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Added SMBUS PCI Ids for SMBUS for Cannon Lake PCH.
Signed-off-by: Srinivas Pandruvada
[jarkko.nikula@linux.intel.com: Add entries to Documentation and Kconfig.
Cover Cannon Lake-H too]
Signed-off-by: Jarkko Nikula
Signed-off-by: Wolfram Sang
01 Jun, 2017
1 commit
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The I2C core files were renamed, adapt the textfile to it.
Reviewed-by: Andy Shevchenko
Signed-off-by: Wolfram Sang
10 Feb, 2017
2 commits
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Intel Gemini Lake has the same SMBus host controller than Intel Broxton.
Signed-off-by: Mika Westerberg
Signed-off-by: Jean Delvare
Signed-off-by: Wolfram Sang -
The rename did the wrong thing for this documentation file all those
years ago. Fix that as well as the neglected rename of the platform
data structure.Fixes: e7065e20d9a6 ("i2c: Rename last mux driver to standard pattern")
Signed-off-by: Peter Rosin
Signed-off-by: Wolfram Sang
16 Dec, 2016
1 commit
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Pull i2c updates from Wolfram Sang:
- the first series of making i2c_device_id optional instead of
mandatory (in favor of alternatives like of_device_id).This involves adding a new probe callback (probe_new) which removes
some peculiarities I2C had for a long time now. The new probe is
matching the other subsystems now and the old one will be removed
once all users are converted. It is expected to take a while but
there is ongoing interest in that.- SMBus Host Notify introduced 4.9 got refactored. They are now using
interrupts instead of the alert callback which solves multiple
issues.- new drivers for iMX LowPower I2C, Mellanox CPLD and its I2C mux
- significant refactoring for bcm2835 driver
- the usual set of driver updates and improvements
* 'i2c/for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (46 commits)
i2c: fsl-lpi2c: read lpi2c fifo size in probe()
i2c: octeon: thunderx: Remove double-check after interrupt
i2c: octeon: thunderx: TWSI software reset in recovery
i2c: cadence: Allow Cadence I2C to be selected for Cadence Xtensa CPUs
i2c: sh_mobile: Add per-Generation fallback bindings
i2c: rcar: Add per-Generation fallback bindings
i2c: imx-lpi2c: add low power i2c bus driver
dt-bindings: i2c: imx-lpi2c: add devicetree bindings
i2c: designware-pcidrv: Add 10bit address feature to medfield/merrifield
i2c: pxa: Add support for the I2C units found in Armada 3700
i2c: pxa: Add definition of fast and high speed modes via the regs layout
dt-bindings: i2c: pxa: Update the documentation for the Armada 3700
i2c: qup: support SMBus block read
i2c: qup: add ACPI support
i2c: designware: Consolidate default functionality bits
i2c: i2c-mux-gpio: update mux with gpiod_set_array_value_cansleep
i2c: mux: pca954x: Add ACPI support for pca954x
i2c: use an IRQ to report Host Notify events, not alert
i2c: i801: remove SMBNTFDDAT reads as they always seem to return 0
i2c: i801: use the BIT() macro for FEATURES_* also
...
24 Nov, 2016
2 commits
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The current SMBus Host Notify implementation relies on .alert() to
relay its notifications. However, the use cases where SMBus Host
Notify is needed currently is to signal data ready on touchpads.This is closer to an IRQ than a custom API through .alert().
Given that the 2 touchpad manufacturers (Synaptics and Elan) that
use SMBus Host Notify don't put any data in the SMBus payload, the
concept actually matches one to one.Benefits are multiple:
- simpler code and API: the client will just have an IRQ, and
nothing needs to be added in the adapter beside internally
enabling it.
- no more specific workqueue, the threading is handled by IRQ core
directly (when required)
- no more races when removing the device (the drivers are already
required to disable irq on remove)
- simpler handling for drivers: use plain regular IRQs
- no more dependency on i2c-smbus for i2c-i801 (and any other adapter)
- the IRQ domain is created automatically when the adapter exports
the Host Notify capability
- the IRQ are assign only if ACPI, OF and the caller did not assign
one already
- the domain is automatically destroyed on remove
- fewer lines of code (minus 20, yeah!)Signed-off-by: Benjamin Tissoires
Signed-off-by: Wolfram Sang -
Device driver for Mellanox I2C controller logic, implemented in Lattice
CPLD device.
Device supports:
- Master mode
- One physical bus
- Polling modeThe Kconfig currently controlling compilation of this code is:
drivers/i2c/busses/Kconfig:config I2C_MLXCPLDSigned-off-by: Michael Shych
Signed-off-by: Vadim Pasternak
Reviewed-by: Jiri Pirko
Reviewed-by: Vladimir Zapolskiy
Signed-off-by: Wolfram Sang
11 Nov, 2016
1 commit
-
Signed-off-by: Peter Rosin
Signed-off-by: Wolfram Sang
08 Sep, 2016
1 commit
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Make it clear that adding slave support shall not disable master
functionality. We can have both, so we should.Signed-off-by: Wolfram Sang