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authorLinus Torvalds <torvalds@linux-foundation.org>2020-10-15 01:09:32 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-15 01:09:32 +0200
commitfe151462bd0f7ad0e758f1cdcbeb6426e3d1ee8e (patch)
tree8a55db7c58314d1c598a77f85bc172bd0cdf0f1a /Documentation/driver-api
parentMerge tag 'tty-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gre... (diff)
parentregmap: debugfs: use semicolons rather than commas to separate statements (diff)
downloadlinux-fe151462bd0f7ad0e758f1cdcbeb6426e3d1ee8e.tar.xz
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Merge tag 'driver-core-5.10-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 patches for 5.10-rc1 They include a lot of different things, all related to the driver core and/or some driver logic: - sysfs common write functions to make it easier to audit sysfs attributes - device connection cleanups and fixes - devm helpers for a few functions - NOIO allocations for when devices are being removed - minor cleanups and fixes All have been in linux-next for a while with no reported issues" * tag 'driver-core-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (31 commits) regmap: debugfs: use semicolons rather than commas to separate statements platform/x86: intel_pmc_core: do not create a static struct device drivers core: node: Use a more typical macro definition style for ACCESS_ATTR drivers core: Use sysfs_emit for shared_cpu_map_show and shared_cpu_list_show mm: and drivers core: Convert hugetlb_report_node_meminfo to sysfs_emit drivers core: Miscellaneous changes for sysfs_emit drivers core: Reindent a couple uses around sysfs_emit drivers core: Remove strcat uses around sysfs_emit and neaten drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output dyndbg: use keyword, arg varnames for query term pairs driver core: force NOIO allocations during unplug platform_device: switch to simpler IDA interface driver core: platform: Document return type of more functions Revert "driver core: Annotate dev_err_probe() with __must_check" Revert "test_firmware: Test platform fw loading on non-EFI systems" iio: adc: xilinx-xadc: use devm_krealloc() hwmon: pmbus: use more devres helpers devres: provide devm_krealloc() syscore: Use pm_pr_dbg() for syscore_{suspend,resume}() ...
Diffstat (limited to 'Documentation/driver-api')
-rw-r--r--Documentation/driver-api/device_connection.rst43
-rw-r--r--Documentation/driver-api/driver-model/devres.rst1
-rw-r--r--Documentation/driver-api/firmware/fallback-mechanisms.rst1
-rw-r--r--Documentation/driver-api/index.rst1
4 files changed, 2 insertions, 44 deletions
diff --git a/Documentation/driver-api/device_connection.rst b/Documentation/driver-api/device_connection.rst
deleted file mode 100644
index ba364224c349..000000000000
--- a/Documentation/driver-api/device_connection.rst
+++ /dev/null
@@ -1,43 +0,0 @@
-==================
-Device connections
-==================
-
-Introduction
-------------
-
-Devices often have connections to other devices that are outside of the direct
-child/parent relationship. A serial or network communication controller, which
-could be a PCI device, may need to be able to get a reference to its PHY
-component, which could be attached for example to the I2C bus. Some device
-drivers need to be able to control the clocks or the GPIOs for their devices,
-and so on.
-
-Device connections are generic descriptions of any type of connection between
-two separate devices.
-
-Device connections alone do not create a dependency between the two devices.
-They are only descriptions which are not tied to either of the devices directly.
-A dependency between the two devices exists only if one of the two endpoint
-devices requests a reference to the other. The descriptions themselves can be
-defined in firmware (not yet supported) or they can be built-in.
-
-Usage
------
-
-Device connections should exist before device ``->probe`` callback is called for
-either endpoint device in the description. If the connections are defined in
-firmware, this is not a problem. It should be considered if the connection
-descriptions are "built-in", and need to be added separately.
-
-The connection description consists of the names of the two devices with the
-connection, i.e. the endpoints, and unique identifier for the connection which
-is needed if there are multiple connections between the two devices.
-
-After a description exists, the devices in it can request reference to the other
-endpoint device, or they can request the description itself.
-
-API
----
-
-.. kernel-doc:: drivers/base/devcon.c
- :functions: device_connection_find_match device_connection_find device_connection_add device_connection_remove
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index eaaaafc21134..f318a5c0033c 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -354,6 +354,7 @@ MEM
devm_kmalloc()
devm_kmalloc_array()
devm_kmemdup()
+ devm_krealloc()
devm_kstrdup()
devm_kvasprintf()
devm_kzalloc()
diff --git a/Documentation/driver-api/firmware/fallback-mechanisms.rst b/Documentation/driver-api/firmware/fallback-mechanisms.rst
index 036383dad6d6..5f04c3bcdf0c 100644
--- a/Documentation/driver-api/firmware/fallback-mechanisms.rst
+++ b/Documentation/driver-api/firmware/fallback-mechanisms.rst
@@ -42,6 +42,7 @@ fallback mechanism:
supported for request_firmware_into_buf().
* Firmware is not accessible through typical means:
+
* It cannot be installed into the root filesystem
* The firmware provides very unique device specific data tailored for
the unit gathered with local information. An example is calibration
diff --git a/Documentation/driver-api/index.rst b/Documentation/driver-api/index.rst
index 5ef2cfe3a16b..6e7c702e0268 100644
--- a/Documentation/driver-api/index.rst
+++ b/Documentation/driver-api/index.rst
@@ -22,7 +22,6 @@ available subsections can be seen below.
pm/index
clk
device-io
- device_connection
dma-buf
device_link
component