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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-22 10:57:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-22 10:57:46 -0800
commit0e63a5c6ba9679a903f95b10827f74fe183017fa (patch)
tree4d1846ddca080645a642b276935d1893d2127204 /Documentation/driver-api
parentMerge tag 'for-5.12/block-ipi-2021-02-21' of git://git.kernel.dk/linux-block (diff)
parentdocs: kernel-hacking: be more civil (diff)
downloadlinux-dev-0e63a5c6ba9679a903f95b10827f74fe183017fa.tar.xz
linux-dev-0e63a5c6ba9679a903f95b10827f74fe183017fa.zip
Merge tag 'docs-5.12' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "It has been a relatively quiet cycle in docsland. - As promised, the minimum Sphinx version to build the docs is now 1.7, and we have dropped support for Python 2 entirely. That allowed the removal of a bunch of compatibility code. - A set of treewide warning fixups from Mauro that I applied after it became clear nobody else was going to deal with them. - The automarkup mechanism can now create cross-references from relative paths to RST files. - More translations, typo fixes, and warning fixes" * tag 'docs-5.12' of git://git.lwn.net/linux: (75 commits) docs: kernel-hacking: be more civil docs: Remove the Microsoft rhetoric Documentation/admin-guide: kernel-parameters: Update nohlt section doc/admin-guide: fix spelling mistake: "perfomance" -> "performance" docs: Document cross-referencing using relative path docs: Enable usage of relative paths to docs on automarkup docs: thermal: fix spelling mistakes Documentation: admin-guide: Update kvm/xen config option docs: Make syscalls' helpers naming consistent coding-style.rst: Avoid comma statements Documentation: /proc/loadavg: add 3 more field descriptions Documentation/submitting-patches: Add blurb about backtraces in commit messages Docs: drop Python 2 support Move our minimum Sphinx version to 1.7 Documentation: input: define ABS_PRESSURE/ABS_MT_PRESSURE resolution as grams scripts/kernel-doc: add internal hyperlink to DOC: sections Update Documentation/admin-guide/sysctl/fs.rst docs: Update DTB format references docs: zh_CN: add iio index.rst translation docs/zh_CN: add iio ep93xx_adc.rst translation ...
Diffstat (limited to 'Documentation/driver-api')
-rw-r--r--Documentation/driver-api/gpio/driver.rst4
-rw-r--r--Documentation/driver-api/men-chameleon-bus.rst12
-rw-r--r--Documentation/driver-api/thermal/sysfs-api.rst6
3 files changed, 17 insertions, 5 deletions
diff --git a/Documentation/driver-api/gpio/driver.rst b/Documentation/driver-api/gpio/driver.rst
index 0fb57e298b41..d6b0d779859b 100644
--- a/Documentation/driver-api/gpio/driver.rst
+++ b/Documentation/driver-api/gpio/driver.rst
@@ -640,8 +640,8 @@ compliance:
level and edge IRQs
* [1] http://www.spinics.net/lists/linux-omap/msg120425.html
-* [2] https://lkml.org/lkml/2015/9/25/494
-* [3] https://lkml.org/lkml/2015/9/25/495
+* [2] https://lore.kernel.org/r/1443209283-20781-2-git-send-email-grygorii.strashko@ti.com
+* [3] https://lore.kernel.org/r/1443209283-20781-3-git-send-email-grygorii.strashko@ti.com
Requesting self-owned GPIO pins
diff --git a/Documentation/driver-api/men-chameleon-bus.rst b/Documentation/driver-api/men-chameleon-bus.rst
index 1b1f048aa748..6f0b9ee47595 100644
--- a/Documentation/driver-api/men-chameleon-bus.rst
+++ b/Documentation/driver-api/men-chameleon-bus.rst
@@ -18,6 +18,7 @@ MEN Chameleon Bus
4.1 The driver structure
4.2 Probing and attaching
4.3 Initializing the driver
+ 4.4 Using DMA
Introduction
@@ -173,3 +174,14 @@ module at the MCB core::
The module_mcb_driver() macro can be used to reduce the above code::
module_mcb_driver(foo_driver);
+
+Using DMA
+---------
+
+To make use of the kernel's DMA-API's function, you will need to use the
+carrier device's 'struct device'. Fortunately 'struct mcb_device' embeds a
+pointer (->dma_dev) to the carrier's device for DMA purposes::
+
+ ret = dma_set_mask_and_coherent(&mdev->dma_dev, DMA_BIT_MASK(dma_bits));
+ if (rc)
+ /* Handle errors */
diff --git a/Documentation/driver-api/thermal/sysfs-api.rst b/Documentation/driver-api/thermal/sysfs-api.rst
index a4969c474cc3..29fdd817ddb0 100644
--- a/Documentation/driver-api/thermal/sysfs-api.rst
+++ b/Documentation/driver-api/thermal/sysfs-api.rst
@@ -54,7 +54,7 @@ temperature) and throttle appropriate devices.
trips:
the total number of trip points this thermal zone supports.
mask:
- Bit string: If 'n'th bit is set, then trip point 'n' is writeable.
+ Bit string: If 'n'th bit is set, then trip point 'n' is writable.
devdata:
device private data
ops:
@@ -406,7 +406,7 @@ Thermal cooling device sys I/F, created once it's registered::
|---stats/reset: Writing any value resets the statistics
|---stats/time_in_state_ms: Time (msec) spent in various cooling states
|---stats/total_trans: Total number of times cooling state is changed
- |---stats/trans_table: Cooing state transition table
+ |---stats/trans_table: Cooling state transition table
Then next two dynamic attributes are created/removed in pairs. They represent
@@ -766,5 +766,5 @@ emergency poweroff kicks in after the delay has elapsed and shuts down
the system.
If set to 0 emergency poweroff will not be supported. So a carefully
-profiled non-zero positive value is a must for emergerncy poweroff to be
+profiled non-zero positive value is a must for emergency poweroff to be
triggered.