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The commit bebff81fb8b9 ("i2c: bcm2835: Model Divider in CCF") introduced
a NULL pointer dereference on driver unload. It seems that we can't fetch
the bus clock via devm_clk_get in bcm2835_i2c_remove. As an alternative
approach store a pointer to the bus clock in the private driver structure.
Fixes: bebff81fb8b9 ("i2c: bcm2835: Model Divider in CCF")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add support for probing i2c driver on the X1000 Soc from Ingenic.
call the corresponding fifo parameter according to the device
model obtained from the devicetree.
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This patch changes the I2C fault codes according to the specified
values in Documentation/i2c/fault-codes.
Signed-off-by: Christoph Müllner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Platform data structs are initialized by default with zero values.
Thus it becomes redundant to initialize them manually to zero (false).
Remove extra false initialization for field members in structs.
Reported-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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In SAM9X60 datasheet, FLEX_TWI_CWGR register description mentions clock
offset of 3 cycles (compared to 4 in eg. SAMA5D3).
This is the same offset as in SAMA5D2.
Fixes: b00277923743 ("i2c: at91: add new platform support for sam9x60")
Suggested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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ioremap has provided non-cached semantics by default since the Linux 2.6
days, so remove the additional ioremap_nocache interface.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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This supports property idle-state,if present,
overrides i2c-mux-idle-disconnect.
My use cases:
- Use the property idle-state to fix
an errata on LS2085ARDB and LS2088ARDB.
- Errata id: E-00013(board LS2085ARDB and
LS2088ARDB revision on Rev.B, Rev.C and Rev.D).
- About E-00013:
- Description: I2C1 and I2C3 buses
are missing pull-up.
- Impact: When the PCA954x device is tri-stated, the I2C bus
will float. This makes the I2C bus and its associated
downstream devices inaccessible.
- Hardware fix: Populate resistors R189 and R190 for I2C1
and resistors R228 and R229 for I2C3.
- Software fix: Remove the tri-state option from the PCA954x
driver(PCA954x always on enable status, specify a
channel zero in dts to fix the errata E-00013).
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
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Because it looks nice!
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
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Convert the i2c core sysfs attributes from DEVICE_ATTR() to
DEVICE_ATTR_*(), to reduce boilerplate.
This requires renaming some functions.
Although no suitable macro exists for the delete_device attribute,
rename i2c_sysfs_delete_device() to delete_device_store() for
consistency.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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All in-kernel users have been converted to
{devm_}i2c_new_dummy_device(). Remove the old API.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Tested-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Pull i2c updates from Wolfram Sang:
"I2C has mostly driver updates this time.
The few noteworthy changes are: the core has now support for analog
and digital filters with at91 being the first user, a core addition to
replace the NULL returning i2c_new_probed_device() with an ERR_PTR
variant, and the pxa driver has finally being moved to use the generic
I2C slave interface. We have quite a significant number of reviews per
patch this time, so thank you to all involved!"
* 'i2c/for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (37 commits)
video: fbdev: matrox: convert to i2c_new_scanned_device
i2c: icy: convert to i2c_new_scanned_device
i2c: replace i2c_new_probed_device with an ERR_PTR variant
i2c: Fix Kconfig indentation
i2c: smbus: Don't filter out duplicate alerts
i2c: i801: Correct Intel Jasper Lake SOC naming
i2c: i2c-stm32f7: fix 10-bits check in slave free id search loop
i2c: iproc: Add i2c repeated start capability
i2c: remove helpers for ref-counting clients
i2c: tegra: Use dma_request_chan() directly for channel request
i2c: sh_mobile: Use dma_request_chan() directly for channel request
i2c: qup: Use dma_request_chan() directly for channel request
i2c: at91: Use dma_request_chan() directly for channel request
i2c: rcar: Remove superfluous call to clk_get_rate()
i2c: pxa: remove unused i2c-slave APIs
i2c: pxa: migrate to new i2c_slave APIs
i2c: cros-ec-tunnel: Make the device acpi compatible
i2c: stm32f7: report dma error during probe
i2c: icy: no need to populate address for scanned device
i2c: xiic: Fix kerneldoc warnings
...
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Move from the deprecated i2c_new_probed_device() to the new
i2c_new_scanned_device(). Make use of the new ERRPTR if suitable.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Max Staudt <max@enpas.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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In the general move to have i2c_new_*_device functions which return
ERR_PTR instead of NULL, this patch converts i2c_new_probed_device().
There are only few users, so this patch converts the I2C core and all
users in one go. The function gets renamed to i2c_new_scanned_device()
so out-of-tree users will get a build failure to understand they need to
adapt their error checking code.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Max Staudt <max@enpas.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Pull driver core updates from Greg KH:
"Here is the "big" set of driver core patches for 5.5-rc1
There's a few minor cleanups and fixes in here, but the majority of
the patches in here fall into two buckets:
- debugfs api cleanups and fixes
- driver core device link support for boot dependancy issues
The debugfs api cleanups are working to slowly refactor the debugfs
apis so that it is even harder to use incorrectly. That work has been
happening for the past few kernel releases and will continue over
time, it's a long-term project/goal
The driver core device link support missed 5.4 by just a bit, so it's
been sitting and baking for many months now. It's from Saravana Kannan
to help resolve the problems that DT-based systems have at boot time
with dependancy graphs and kernel modules. Turns out that no one has
actually tried to build a generic arm64 kernel with loads of modules
and have it "just work" for a variety of platforms (like a distro
kernel). The big problem turned out to be a lack of dependency
information between different areas of DT entries, and the work here
resolves that problem and now allows devices to boot properly, and
quicker than a monolith kernel.
All of these patches have been in linux-next for a long time with no
reported issues"
* tag 'driver-core-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (68 commits)
tracing: Remove unnecessary DEBUG_FS dependency
of: property: Add device link support for interrupt-parent, dmas and -gpio(s)
debugfs: Fix !DEBUG_FS debugfs_create_automount
of: property: Add device link support for "iommu-map"
of: property: Fix the semantics of of_is_ancestor_of()
i2c: of: Populate fwnode in of_i2c_get_board_info()
drivers: base: Fix Kconfig indentation
firmware_loader: Fix labels with comma for builtin firmware
driver core: Allow device link operations inside sync_state()
driver core: platform: Declare ret variable only once
cpu-topology: declare parse_acpi_topology in <linux/arch_topology.h>
crypto: hisilicon: no need to check return value of debugfs_create functions
driver core: platform: use the correct callback type for bus_find_device
firmware_class: make firmware caching configurable
driver core: Clarify documentation for fwnode_operations.add_links()
mailbox: tegra: Fix superfluous IRQ error message
net: caif: Fix debugfs on 64-bit platforms
mac80211: Use debugfs_create_xul() helper
media: c8sectpfe: no need to check return value of debugfs_create functions
of: property: Add device link support for iommus, mboxes and io-channels
...
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Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^ /\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Getting the same alert twice in a row is legal and normal,
especially on a fast device (like running in qemu). Kind of
like interrupts. So don't report duplicate alerts, and deliver
them normally.
[JD: Fixed subject]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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There is no suffix applied to Intel Jasper Lake SOC. Remove it
from the comments and definitions. Besides that, it's a SOC,
thus replace PCH with SOC where it appropriate.
Fixes: e0c61c04791a ("i2c: i801: Add support for Intel Jasper Lake")
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Fix a typo in the free slave id search loop. Instead of I2C_CLIENT_PEC,
it should have been I2C_CLIENT_TEN. The slave id 1 can only handle 7-bit
addresses and thus is not eligible in case of 10-bit addresses.
As a matter of fact none of the slave id support I2C_CLIENT_PEC, overall
check is performed at the beginning of the stm32f7_i2c_reg_slave function.
Fixes: 60d609f30de2 ("i2c: i2c-stm32f7: Add slave support")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This allows the of_devlink feature to work across i2c devices too. This
avoid unnecessary probe deferrals of i2c devices, defers consumers of
i2c devices till the i2c devices probe, and allows i2c drivers to
implement sync_state() callbacks.
Signed-off-by: Saravana Kannan <saravanak@google.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Link: https://lore.kernel.org/r/20191115045049.261104-1-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Enable handling of i2c repeated start. The current code
handles a multi msg i2c transfer as separate i2c bus
transactions. This change will now handle this case
using the i2c repeated start protocol. The number of msgs
in a transfer is limited to two, and must be a write
followed by a read.
Signed-off-by: Lori Hikichi <lori.hikichi@broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: Icarus Chau <icarus.chau@broadcom.com>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Shivaraj Shetty <sshetty1@broadcom.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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There are no in-tree users of these helpers anymore, and there
shouldn't. Most use cases went away once the driver model started to
refcount for us. There have been users like the media subsystem, but
they all switched to better refcounting methods meanwhile. Media did
this in 2008. Last user (IPMI) left 2018. Remove this cruft.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
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We can't use "adap->dev" after it has been freed.
Fixes: 5bf4fa7daea6 ("i2c: break out OF support into separate file")
Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Many cheap devices use Silead touchscreen controllers. Testing has shown
repeatedly that these touchscreen controllers work fine at 400KHz, but for
unknown reasons do not work properly at 100KHz. This has been seen on
both ARM and x86 devices using totally different i2c controllers.
On some devices the ACPI tables list another device at the same I2C-bus
as only being capable of 100KHz, testing has shown that these other
devices work fine at 400KHz (as can be expected of any recent I2C hw).
This commit makes i2c_acpi_find_bus_speed() always return 400KHz if a
Silead touchscreen controller is present, fixing the touchscreen not
working on devices which ACPI tables' wrongly list another device on the
same bus as only being capable of 100KHz.
Specifically this fixes the touchscreen on the Jumper EZpad 6 m4 not
working.
Reported-by: youling 257 <youling257@gmail.com>
Tested-by: youling 257 <youling257@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
[wsa: rewording warning a little]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
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dma_request_slave_channel_reason() is:
#define dma_request_slave_channel_reason(dev, name) \
dma_request_chan(dev, name)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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dma_request_slave_channel_reason() is:
dma_request_chan(dev, name)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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dma_request_slave_channel_reason() is:
#define dma_request_slave_channel_reason(dev, name) \
dma_request_chan(dev, name)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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dma_request_slave_channel_reason() is:
#define dma_request_slave_channel_reason(dev, name) \
dma_request_chan(dev, name)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Variable "rate" already contains the current clock rate, so use that
rather than calling clk_get_rate() again.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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With the i2c-pxa driver migrated to the standard i2c-slave
APIs, the custom APIs and structures are no longer needed
or used. Remove them.
Signed-off-by: Patrick Williams <alpawi@amazon.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The i2c subsystem was enhanced circa 2015 to support operating as
an i2c-slave device. Prior to that, the i2c-pxa driver supported
an i2c-slave but had its own APIs. There are no existing in-kernel
drivers or platforms that utilize the i2c-pxa APIs.
Migrate the i2c-pxa driver to the general i2c-slave APIs so that
existing drivers, such as the i2c-slave-eeprom, can be used.
This has been tested with a Marvell EspressoBin, using i2c-pxa and
i2c-slave-eeprom, acting as a slave, and a RaspeberryPi 3, using the
at24 driver, acting as a master.
Signed-off-by: Patrick Williams <alpawi@amazon.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add ACPI entry and use device_property_read to get fw value
which is common to both dtsi and acpi.
Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Acked-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Distinguish between the case where dma information is not provided
within the DT and the case of an error during the dma init.
Exit the probe with error in case of an error during dma init.
Fixes: bb8822cbbc53 ("i2c: i2c-stm32: Add generic DMA API")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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i2c_new_{probed|scanned}_device will update the address after scanning.
No need to preset it.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Max Staudt <max@enpas.org>
Tested-by: Max Staudt <max@enpas.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Fix the below warning by adding the description of clock and dev.
drivers/i2c/busses/i2c-xiic.c:57: info: Scanning doc for struct xiic_i2c
drivers/i2c/busses/i2c-xiic.c:84: warning: Function parameter or member
'dev' not described in 'xiic_i2c'
drivers/i2c/busses/i2c-xiic.c:84: warning: Function parameter or member
'clk' not described in 'xiic_i2c'
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add missing dma channels free calls in case of error during probe
and reorder the remove function so that dma channels are freed after
the i2c adapter is deleted.
Overall, reorder the remove function so that probe error handling order
and remove function order are same.
Fixes: 7ecc8cfde553 ("i2c: i2c-stm32f7: Add DMA support")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The IP can handle two slave addresses. One address can either be
7 bits or 10 bits while the other can only be 7 bits.
In order to ensure that a 10 bits address can always be allocated
(assuming there is only one 7 bits address already allocated),
pick up the 7-bits only address slot in priority when performing a 7-bits
address allocation.
Fixes: 60d609f30de2 ("i2c: i2c-stm32f7: Add slave support")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Remove the following warning:
drivers/i2c/busses/i2c-stm32f7.c:315:
warning: cannot understand function prototype:
'struct stm32f7_i2c_spec i2c_specs[] =
Replace a comment starting with /** by simply /* to avoid having
it interpreted as a kernel-doc comment.
Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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When in slave mode, an arbitration loss (ARLO) may be detected before the
slave had a chance to detect the stop condition (STOPF in ISR).
This is seen when two master + slave adapters switch their roles. It
provokes the i2c bus to be stuck, busy as SCL line is stretched.
- the I2C_SLAVE_STOP event is never generated due to STOPF flag is set but
don't generate an irq (race with ARLO irq, STOPIE is masked). STOPF flag
remains set until next master xfer (e.g. when STOPIE irq get unmasked).
In this case, completion is generated too early: immediately upon new
transfer request (then it doesn't send all data).
- Some data get stuck in TXDR register. As a consequence, the controller
stretches the SCL line: the bus gets busy until a future master transfer
triggers the bus busy / recovery mechanism (this can take time... and
may never happen at all)
So choice is to let the STOPF being detected by the slave isr handler,
to properly handle this stop condition. E.g. don't mask IRQs in error
handler, when the slave is running.
Fixes: 60d609f30de2 ("i2c: i2c-stm32f7: Add slave support")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The slave-interface documentation [1] states "the bus driver should
transmit the first byte" upon I2C_SLAVE_READ_REQUESTED slave event:
- 'val': backend returns first byte to be sent
The driver currently ignores the 1st byte to send on this event.
[1] https://www.kernel.org/doc/Documentation/i2c/slave-interface
Fixes: 60d609f30de2 ("i2c: i2c-stm32f7: Add slave support")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Since commit abf4923e97c3 ("i2c: mediatek: disable zero-length transfers
for mt8183"), there is a NULL pointer dereference for all the SoCs
that don't have any quirk. mtk_i2c_functionality is not checking that
the quirks pointer is not NULL before starting to use it.
This commit add a call to i2c_check_quirks which will check whether
the quirks pointer is set, and if so will check if the IP has the
NO_ZERO_LEN quirk.
Fixes: abf4923e97c3 ("i2c: mediatek: disable zero-length transfers for mt8183")
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Cengiz Can <cengiz@kernel.wtf>
Reviewed-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Ulrich Hecht <uli@fpond.eu>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add support for another Intel Comet Lake variant.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add support for SMBus controller on Intel Jasper Lake PCH-N.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add support for analog filtering for i2c lines.
The sama5d2 and sam9x60 support this feature.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add new platform data support for advanced digital filtering for i2c.
The sama5d2 and sam9x60 support this feature.
This digital filter allows the user to configure the maximum
width of the spikes that can be filtered.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add new platform data support for digital filtering for i2c.
The sama5d4, sama5d2 and sam9x60 support this feature.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add new platform data support for the sam9x60 SoC
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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i2c-digital-filter-width-ns:
This optional timing property specifies the width of the spikes on the i2c
lines (in ns) that can be filtered out by built-in digital filters which are
embedded in some i2c controllers.
i2c-analog-filter-cutoff-frequency:
This optional timing property specifies the cutoff frequency of a low-pass
analog filter built-in i2c controllers. This low pass filter is used to filter
out high frequency noise on the i2c lines. Specified in Hz.
Include these properties in the timings structure and read them as integers.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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The driver default behavior works with the AST2600. We need a new
compatible though to make sure the driver doesn't enable AST2400 or
AST2500 behavior.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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In case of master pending state, it should not trigger a master
command, otherwise data could be corrupted because this H/W shares
the same data buffer for slave and master operations. It also means
that H/W command queue handling is unreliable because of the buffer
sharing issue. To fix this issue, it clears command queue if a
master command is queued in pending state to use S/W solution
instead of H/W command queue handling. Also, it refines restarting
mechanism of the pending master command.
Fixes: 2e57b7cebb98 ("i2c: aspeed: Add multi-master use case support")
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Acked-by: Joel Stanley <joel@jms.id.au>
Tested-by: Tao Ren <taoren@fb.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Add read-only versions of all EEPROMs. These versions are read-only
on the i2c side, but can be written from the sysfs side.
Signed-off-by: Björn Ardö <bjorn.ardo@axis.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Stefan Wahren
周琰杰 (Zhou Yanjie)
Christoph Müllner
Eugen Hristev
Christoph Hellwig
Biwen Li
Peter Rosin
Geert Uytterhoeven
Wolfram Sang
Linus Torvalds
Krzysztof Kozlowski
Corey Minyard
Andy Shevchenko
Alain Volmat
Saravana Kannan
Lori Hikichi
Wen Yang
Hans de Goede
Peter Ujfalusi
Patrick Williams
Akshu Agrawal
Shubhrajyoti Datta
Fabrice Gasnier
Fabien Parent
Jarkko Nikula
Eddie James
Jae Hyun Yoo
Björn Ardö