Add support for handling ASF slave process events as described in the AMD
ASF databook. This involves implementing the correct programming sequence
to manage each ASF packet appropriately.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Implement the i2c_algorithm operations to enable support for AMD ASF
(Alert Standard Format) with SMBus. This enhancement includes:
- Adding functionality to identify and select the supported ASF functions.
- Implementing mechanisms for registering and deregistering I2C slave
devices.
- Providing support for data transfer operations over ASF.
Additionally, include a 'select' Kconfig entry as the current patch
utilizes .reg_slave() and .unreg_slave() callbacks, which are controlled
by CONFIG_I2C_SLAVE.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
The AMD ASF controller is presented to the operating system as an ACPI
device. The AMD ASF driver can use ACPI to obtain information about the
ASF controller's attributes, such as the ASF address space and interrupt
number, and to handle ASF interrupts.
Currently, the piix4 driver assumes that a specific port address is
designated for AUX operations. However, with the introduction of ASF, the
same port address may also be used by the ASF controller. Therefore, a
check needs to be added to ensure that if ASF is advertised and enabled in
ACPI, the AUX port should not be configured.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Export the following i2c_piix4 driver functions as a library so that the
AMD ASF driver can utilize these core functionalities from the i2c_piix4
driver:
- piix4_sb800_region_request(): Request access to a specific SMBus region
on the SB800 chipset.
- piix4_sb800_region_release(): Release the previously requested SMBus
region on the SB800 chipset.
- piix4_transaction(): Handle SMBus transactions between the SMBus
controller and connected devices.
- piix4_sb800_port_sel(): Select the appropriate SMBus port on the SB800
chipset.
By making these functions available as a library, enable the AMD ASF
driver to leverage the established mechanisms in the i2c_piix4 driver,
promoting code reuse and consistency across different drivers.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Add a separate header file to relocate the common code from the i2c_piix4
driver, allowing the AMD ASF driver to utilize the same code.
Update the MAINTAINERS file to include information about the new common
header file.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Currently, `piix4_transaction()` accepts only one parameter, which is the
`i2c_adapter` information. This approach works well as long as SB800 SMBus
port accesses are confined to the piix4 driver. However, with the
implementation of a separate ASF driver and the varying address spaces
across drivers, it is necessary to change the function parameter list of
`piix4_transaction()` to include the port address. This modification
allows other drivers that use piix4 to pass the specific port details they
need to operate on.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Convert existing descriptions to kernel-doc format and unify
the rest of the comments to follow the modern style.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Octal permissions are preferred over the symbolics ones
for readbility. This ceases warning message pointed by checkpatch.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Update header inclusions to follow IWYU (Include What You Use)
principle.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
There are two different names used for the variable that holds
an error code. Unify to use one variant in all cases.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Simplify the code by using read_poll_timeout().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Introduce a temporary variable to hold a device pointer.
It can be utilized in the ->probe() and save a bit of LoCs.
To make it consistent, rename currently used dev to pdev.
While at it, convert the only error message to dev_err_probe().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Switch from i2c_add_adapter() to resource managed devm_i2c_add_adapter()
for matching rest of driver initialization, and more concise code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Use custom private data structure instead of global variables.
With that, remove not anymore true comment.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Use modern string_choices API instead of manually determining the
output using ternary operator.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
There are a lot of messaging calls that use global variable of
struct i2c_adapter. Instead, to make code better and flexible
for further improvements, pass the pointer to the actual adapter
used for transfers.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Rework the read and write code paths in the driver to support operation
in atomic contexts in master mode. This change does not apply to slave
mode because there is no way to handle interruptions in that context.
Adjust the message timeout to include some extra time. For non-atomic
contexts, 500 ms is added to the timeout. For atomic contexts,
2000 ms is added because transfers happen in polled mode, requiring
more time to account for the polling overhead.
Similar changes have been implemented in other drivers, including:
commit 3a5ee18d2a ("i2c: imx: implement master_xfer_atomic callback")
commit 445094c8a9 ("i2c: exynos5: add support for atomic transfers")
commit ede2299f71 ("i2c: tegra: Support atomic transfers")
commit fe402bd090 ("i2c: meson: implement the master_xfer_atomic
callback")
Signed-off-by: Manikanta Guntupalli <manikanta.guntupalli@amd.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
The cdns_i2c_master_xfer function has been refactored to separate
the common code. This change facilitates better support for atomic
mode operations by isolating the shared logic.
Signed-off-by: Manikanta Guntupalli <manikanta.guntupalli@amd.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Introduce APIs to handle the execution of device parts admin commands.
These APIs cover functionalities such as mode setting, object creation
and destruction, and operations like parts get/set and metadata
retrieval.
These APIs will be utilized in upcoming patches within this series.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20241113115200.209269-5-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Manage device and driver capabilities via the admin commands.
The device exposes its supported features and resource object limits via
an administrative command called VIRTIO_ADMIN_CMD_CAP_ID_LIST_QUERY,
using the 'self group type.'
Each capability is identified by a unique ID, and the driver
communicates the functionality and resource limits it plans to utilize.
The capability VIRTIO_DEV_PARTS_CAP specifically represents the device's
parts resource object limit.
Manage the device's parts resource object ID using a common IDA for both
get and set operations.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20241113115200.209269-4-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Extend the admin command by incorporating a result size field.
This allows higher layers to determine the actual result size from the
backend when this information is not included in the result_sg.
The additional information introduced here will be used in subsequent
patches of this series.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20241113115200.209269-3-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Introduce device parts access commands via the admin queue.
These commands and their structure adhere to the Virtio 1.4
specification.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20241113115200.209269-2-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Add a debugfs document description file to help users understand
how to use the hisilicon accelerator live migration driver's
debugfs.
Update the file paths that need to be maintained in MAINTAINERS
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20241112073322.54550-5-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
On the debugfs framework of VFIO, if the CONFIG_VFIO_DEBUGFS macro is
enabled, the debug function is registered for the live migration driver
of the HiSilicon accelerator device.
After registering the HiSilicon accelerator device on the debugfs
framework of live migration of vfio, a directory file "hisi_acc"
of debugfs is created, and then three debug function files are
created in this directory:
vfio
|
+---<dev_name1>
| +---migration
| +--state
| +--hisi_acc
| +--dev_data
| +--migf_data
| +--cmd_state
|
+---<dev_name2>
+---migration
+--state
+--hisi_acc
+--dev_data
+--migf_data
+--cmd_state
dev_data file: read device data that needs to be migrated from the
current device in real time
migf_data file: read the migration data of the last live migration
from the current driver.
cmd_state: used to get the cmd channel state for the device.
+----------------+ +--------------+ +---------------+
| migration dev | | src dev | | dst dev |
+-------+--------+ +------+-------+ +-------+-------+
| | |
| +------v-------+ +-------v-------+
| | saving_migf | | resuming_migf |
read | | file | | file |
| +------+-------+ +-------+-------+
| | copy |
| +------------+----------+
| |
+-------v--------+ +-------v--------+
| data buffer | | debug_migf |
+-------+--------+ +-------+--------+
| |
cat | cat |
+-------v--------+ +-------v--------+
| dev_data | | migf_data |
+----------------+ +----------------+
When accessing debugfs, user can obtain the most recent status data
of the device through the "dev_data" file. It can read recent
complete status data of the device. If the current device is being
migrated, it will wait for it to complete.
The data for the last completed migration function will be stored
in debug_migf. Users can read it via "migf_data".
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20241112073322.54550-4-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Alexei Starovoitov says:
====================
bpf: range_tree for bpf arena
From: Alexei Starovoitov <ast@kernel.org>
Introduce range_tree (interval tree plus rbtree) to track
unallocated ranges in bpf arena and replace maple_tree with it.
This is a step towards making bpf_arena|free_alloc_pages non-sleepable.
The previous approach to reuse drm_mm to replace maple_tree reached
dead end, since sizeof(struct drm_mm_node) = 168 and
sizeof(struct maple_node) = 256 while
sizeof(struct range_node) = 64 introduced in this patch.
Not only it's smaller, but the algorithm splits and merges
adjacent ranges. Ultimate performance doesn't matter.
The main objective of range_tree is to work in context
where kmalloc/kfree are not safe. It achieves that via bpf_mem_alloc.
====================
Link: https://patch.msgid.link/20241108025616.17625-1-alexei.starovoitov@gmail.com
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Add a test that verifies specific behavior of arena range tree
algorithm and adjust existing big_alloc1 test due to use
of global data in arena.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/bpf/20241108025616.17625-3-alexei.starovoitov@gmail.com
Introduce range_tree data structure and use it in bpf arena to track
ranges of allocated pages. range_tree is a large bitmap that is
implemented as interval tree plus rbtree. The contiguous sequence of
bits represents unallocated pages.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/bpf/20241108025616.17625-2-alexei.starovoitov@gmail.com
Fix a locking issue in the asymmetric CPU capacity setup code in the
intel_pstate driver that may lead to a deadlock if CPU online/offline
runs in parallel with the code in question, which is unlikely but not
impossible (Rafael Wysocki).
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Merge tag 'pm-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"Fix a locking issue in the asymmetric CPU capacity setup code in the
intel_pstate driver that may lead to a deadlock if CPU online/offline
runs in parallel with the code in question, which is unlikely but not
impossible (Rafael Wysocki)"
* tag 'pm-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: intel_pstate: Rearrange locking in hybrid_init_cpu_capacity_scaling()
Two bug fixes for TPM bus encryption (the remaining reported issues in
the feature).
BR, Jarkko
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Merge tag 'tpmdd-next-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm fixes from Jarkko Sakkinen:
"Two bug fixes for TPM bus encryption (the remaining reported issues in
the feature)"
* tag 'tpmdd-next-6.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
tpm: Disable TPM on tpm2_create_primary() failure
tpm: Opt-in in disable PCR integrity protection
The controller driver is the parent device of the PCIe host bridge,
PCI-PCI bridge and PCIe endpoint as shown below.
PCIe controller (Top level parent & parent of host bridge)
|
v
PCIe Host bridge (Parent of PCI-PCI bridge)
|
v
PCI-PCI bridge (Parent of endpoint driver)
|
v
PCIe endpoint driver
Now, when the controller device goes to runtime suspend, PM framework will
check the runtime PM state of the child device (host bridge) and will find
it to be disabled. So it will allow the parent (controller device) to go to
runtime suspend. Only if the child device's state was 'active' it will
prevent the parent to get suspended.
It is a property of the runtime PM framework that it can only follow
continuous dependency chains. That is, if there is a device with runtime
PM disabled in a dependency chain, runtime PM cannot be enabled for devices
below it and above it in that chain both at the same time.
Since runtime PM is disabled for host bridge, the state of the child
devices under the host bridge is not taken into account by PM framework for
the top level parent, PCIe controller. So the PM framework allows the
controller driver to enter runtime PM irrespective of the state of the
devices under the host bridge. And this causes the topology breakage and
also possible PM issues like controller driver going to runtime suspend
while the endpoint driver is doing transfers.
Because of the above, in order to enable runtime PM for a PCIe controller
device, one needs to ensure that runtime PM is enabled for all devices in
every dependency chain between it and any PCIe endpoint (as runtime PM is
enabled for PCIe endpoints).
This means that runtime PM needs to be enabled for the host bridge device,
which is present in all of these dependency chains.
After this change, the host bridge device will be runtime-suspended by the
runtime PM framework automatically after suspending its last child and it
will be runtime-resumed automatically before resuming its first child which
will allow the runtime PM framework to track dependencies between the host
bridge device and all of its descendants.
The PM framework expects parent runtime PM to be enabled before enabling
runtime PM of the child. Ensure pm_runtime_enable() is called for the
controller drivers before calling pci_host_probe().
Link: https://lore.kernel.org/r/20241111-runtime_pm-v7-2-9c164eefcd87@quicinc.com
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
A PCI controller device, e.g., StarFive, is parent to PCI host bridge
device. We must enable runtime PM of the controller before enabling runtime
PM of the host bridge, which will happen in pci_host_probe(), to avoid this
warning:
pcie-starfive 940000000.pcie: Enabling runtime PM for inactive device with active children
Fix this issue by enabling StarFive controller device's runtime PM before
calling pci_host_probe() in plda_pcie_host_init().
Link: https://lore.kernel.org/r/20241111-runtime_pm-v7-1-9c164eefcd87@quicinc.com
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mayank Rana <quic_mrana@quicinc.com>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
seq_printf is costly. For each block device, 19 decimal values are
yielded in /proc/diskstats via seq_printf. On a system with 16 logical
block devices, profiling for open/read/close sequences shows seq_printf
took ~75% samples of diskstats_show:
diskstats_show(92.626% 2269372/2450040)
seq_printf(76.026% 1725313/2269372)
vsnprintf(99.163% 1710866/1725313)
format_decode(26.597% 455040/1710866)
number(19.554% 334542/1710866)
memcpy_orig(4.183% 71570/1710866)
...
srso_return_thunk(0.009% 148/1725313)
part_stat_read_all(8.030% 182236/2269372)
One million rounds of open/read/close /proc/diskstats takes:
real 0m37.687s
user 0m0.264s
sys 0m32.911s
On average, each sequence tooks ~0.032ms
With this patch, most decimal values are yield via seq_put_decimal_ull,
performance is significantly improved:
real 0m20.792s
user 0m0.316s
sys 0m20.463s
On average, each sequence tooks ~0.020ms, a ~37.5% improvement.
Signed-off-by: David Wang <00107082@163.com>
Link: https://lore.kernel.org/r/20241108054500.4251-1-00107082@163.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cross-merge bpf fixes after downstream PR.
In particular to bring the fix in
commit aa30eb3260 ("bpf: Force checkpoint when jmp history is too long").
The follow up verifier work depends on it.
And the fix in
commit 6801cf7890 ("selftests/bpf: Use -4095 as the bad address for bits iterator").
It's fixing instability of BPF CI on s390 arch.
No conflicts.
Adjacent changes in:
Auto-merging arch/Kconfig
Auto-merging kernel/bpf/helpers.c
Auto-merging kernel/bpf/memalloc.c
Auto-merging kernel/bpf/verifier.c
Auto-merging mm/slab_common.c
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
When compile rtc-a4, build error as following:
ERROR: modpost: drivers/rtc/rtc-amlogic-a4: struct of_device_id is
not terminated with a NULL entry!
This commit is to fix it.
Fixes: c89ac9182e ("rtc: support for the Amlogic on-chip RTC")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Link: https://lore.kernel.org/r/20241113-fix_a4_rtc-v1-1-307af26449a8@amlogic.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
When the SIGNED condition is met, the variable `var` should be cast to
`long long` instead of `unsigned long long`.
Signed-off-by: Luo Yifan <luoyifan@cmss.chinamobile.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/bpf/20241112073701.283362-1-luoyifan@cmss.chinamobile.com
they are unused since 2021 (David Alan Gilbert)
- Make the sp804 driver user selectable as they may be unused on some
platforms (Mark Brown)
- Don't fail if the ti-dm does not describe an interrupt in the DT as
this could be a normal situation if the PWM is used (Judith Mendez)
- Always use cluster 0 counter as a clocksource on a multi-cluster
system to prevent problems related to the time shifting between
clusters if multiple per cluster clocksource is used (Paul Burton)
- Move the RaLink system tick counter from the arch directory to the
clocksource directory (Sergio Paracuellos)
- Convert the owl-timer bindings into yaml schema (Ivaylo Ivanov)
- Fix child node refcount handling on the TI DM by relying on the
__free annotation to automatically release the refcount on the node
(Javier Carrasco)
- Remove pointless cast in the GPX driver as PTR_ERR already does that
(Tang Bin)
- Use of_property_present() for non-boolean properties where it is
possible in the different drivers (Rob Herring)
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Merge tag 'timers-v6.13-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core
Pull clocksource/event updates from Daniel Lezcano:
- Remove unused dw_apb_clockevent_[pause|resume|stop] functions as
they are unused since 2021 (David Alan Gilbert)
- Make the sp804 driver user selectable as they may be unused on some
platforms (Mark Brown)
- Don't fail if the ti-dm does not describe an interrupt in the DT as
this could be a normal situation if the PWM is used (Judith Mendez)
- Always use cluster 0 counter as a clocksource on a multi-cluster
system to prevent problems related to the time shifting between
clusters if multiple per cluster clocksource is used (Paul Burton)
- Move the RaLink system tick counter from the arch directory to the
clocksource directory (Sergio Paracuellos)
- Convert the owl-timer bindings into yaml schema (Ivaylo Ivanov)
- Fix child node refcount handling on the TI DM by relying on the
__free annotation to automatically release the refcount on the node
(Javier Carrasco)
- Remove pointless cast in the GPX driver as PTR_ERR already does that
(Tang Bin)
- Use of_property_present() for non-boolean properties where it is
possible in the different drivers (Rob Herring)
Link: https://lore.kernel.org/lkml/8d402321-96f1-47f7-9347-a850350d60de@linaro.org
Some applications require Vout to be higher than the detectable voltage
range of the Vsense pin for a given rail. In such applications, a voltage
divider may be placed between Vout and the Vsense pin, but this results
in erroneous telemetry being read back from the part. This change adds
support for a voltage divider to be defined in the devicetree for a (or
multiple) specific rail(s) for a supported digital multiphase device and
for the applicable Vout telemetry to be scaled based on the voltage
divider configuration.
This change copies the implementation of the vout-voltage-divider
devicetree property defined in the maxim,max20730 bindings schema since
it is the best fit for the use case of scaling hwmon PMBus telemetry. The
generic voltage-divider property used by many iio drivers was determined
to be a poor fit because that schema is tied directly to iio and the
isl68137 driver is not an iio driver.
Signed-off-by: Grant Peltier <grantpeltier93@gmail.com>
Message-ID: <8c2d048f87282bcf66313afbf5e923d8fc17b4d7.1731439797.git.grantpeltier93@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Add devicetree bindings to support declaring optional voltage dividers to
the rail outputs of supported digital multiphase regulators. Some
applications require Vout to exceed the voltage range that the Vsense pin
can detect. This binding definition allows users to define the
characteristics of a voltage divider placed between Vout and the Vsense
pin for any rail powered by the device.
These bindings copy the vout-voltage-divider property defined in the
maxim,max20730 bindings schema since it is the best fit for the use case
of scaling hwmon PMBus telemetry. The generic voltage-divider property
used by many iio drivers was determined to be a poor fit because that
schema is tied directly to iio for the purpose of scaling io-channel
voltages and the isl68137 driver is not an iio driver.
New schema file named isil,isl68137.yaml to align with the corresponding
driver name and pre-existing bindings ported from trivial bindings.
However, all new device bindings use renesas as the vendor prefix
since Renesas acquired Intersil and now maintains all documentation
for the devices.
Signed-off-by: Grant Peltier <grantpeltier93@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Message-ID: <f7ac200e982961ff733de27a5c4505c04d68b6f3.1731439797.git.grantpeltier93@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
It's possible to build a kernel with tmp108 built-in but i3c support
in a loadable module, but that results in a link failure:
x86_64-linux-ld: drivers/hwmon/tmp108.o: in function `p3t1085_i3c_probe':
tmp108.c:(.text+0x5f9): undefined reference to `i3cdev_to_dev'
Add a Kconfig dependency to ensure only the working configurations
are allowed.
Fixes: c40655e331 ("hwmon: (tmp108) Add support for I3C device")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Message-ID: <20241113175615.2442851-1-arnd@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
For userspace that wants to disable KVM_X86_QUIRK_STUFF_FEATURE_MSRS, it
is useful to know what bits can be set to 1 in MSR_PLATFORM_INFO (apart
from the TSC ratio). The right way to do that is via /dev/kvm's
feature MSR mechanism.
In fact, MSR_PLATFORM_INFO is already a feature MSR for the purpose of
blocking updates after the vCPU is run, but KVM_GET_MSRS did not return
a valid value for it.
Just like in a VM that leaves KVM_X86_QUIRK_STUFF_FEATURE_MSRS enabled,
the TSC ratio field is left to 0. Only bit 31 is set.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Latest Intel platform Clearwater Forest has introduced new instructions
enumerated by CPUIDs of SHA512, SM3, SM4 and AVX-VNNI-INT16. Advertise
these CPUIDs to userspace so that guests can query them directly.
SHA512, SM3 and SM4 are on an expected-dense CPUID leaf and some other
bits on this leaf have kernel usages. Considering they have not truly
kernel usages, hide them in /proc/cpuinfo.
These new instructions only operate in xmm, ymm registers and have no new
VMX controls, so there is no additional host enabling required for guests
to use these instructions, i.e. advertising these CPUIDs to userspace is
safe.
Tested-by: Jiaan Lu <jiaan.lu@intel.com>
Tested-by: Xuelian Guo <xuelian.guo@intel.com>
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Message-ID: <20241105054825.870939-1-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This patch makes a minor adjustment by moving the va_end call before
exit. Since the exit() function terminates the program, any code
after exit(128) (i.e., va_end(params)) is unreachable and thus not
executed. Placing va_end before exit ensures that the va_list is
properly cleaned up.
Signed-off-by: Luo Yifan <luoyifan@cmss.chinamobile.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20241111091701.275496-1-luoyifan@cmss.chinamobile.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This patch makes a minor change that removes a redundant variable
assignment. The assignment before the for loop is duplicated by the
initialization within the loop header.
Signed-off-by: Luo Yifan <luoyifan@cmss.chinamobile.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20241111095209.276332-1-luoyifan@cmss.chinamobile.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
