Documentation: irq-domain.rst: Simple improvements

The improvements include:

  * Capitals in headlines.
  * Add commas: for easier reading, it is always desired to add commas
    at some places in text. Like before adverbs or after fronted
    sentences.
  * 3rd person -> add 's' to verbs.
  * End some sentences with period and start a new one. Avoid thus heavy
    sentences.

[ tglx: Fix up subject prefix ]

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250319092951.37667-56-jirislaby@kernel.org

diff --git a/Documentation/core-api/irq/irq-domain.rst b/Documentation/core-api/irq/irq-domain.rst
index c365c3ed4eba6790dbe0913fb917cd6c18bd6bcf..cb25649d0bb7a6ab40d576e100516d731d957418 100644 (file)
--- a/Documentation/core-api/irq/irq-domain.rst
+++ b/Documentation/core-api/irq/irq-domain.rst
@@ -1,19 +1,19 @@
 ===============================================
-The irq_domain interrupt number mapping library
+The irq_domain Interrupt Number Mapping Library
 ===============================================
 
 The current design of the Linux kernel uses a single large number
 space where each separate IRQ source is assigned a different number.
 This is simple when there is only one interrupt controller, but in
-systems with multiple interrupt controllers the kernel must ensure
+systems with multiple interrupt controllers, the kernel must ensure
 that each one gets assigned non-overlapping allocations of Linux
 IRQ numbers.
 
 The number of interrupt controllers registered as unique irqchips
-show a rising tendency: for example subdrivers of different kinds
+shows a rising tendency. For example, subdrivers of different kinds
 such as GPIO controllers avoid reimplementing identical callback
 mechanisms as the IRQ core system by modelling their interrupt
-handlers as irqchips, i.e. in effect cascading interrupt controllers.
+handlers as irqchips. I.e. in effect cascading interrupt controllers.
 
 Here the interrupt number loose all kind of correspondence to
 hardware interrupt numbers: whereas in the past, IRQ numbers could
@@ -21,15 +21,15 @@ be chosen so they matched the hardware IRQ line into the root
 interrupt controller (i.e. the component actually fireing the
 interrupt line to the CPU) nowadays this number is just a number.
 
-For this reason we need a mechanism to separate controller-local
-interrupt numbers, called hardware irq's, from Linux IRQ numbers.
+For this reason, we need a mechanism to separate controller-local
+interrupt numbers, called hardware IRQs, from Linux IRQ numbers.
 
 The irq_alloc_desc*() and irq_free_desc*() APIs provide allocation of
 irq numbers, but they don't provide any support for reverse mapping of
 the controller-local IRQ (hwirq) number into the Linux IRQ number
 space.
 
-The irq_domain library adds mapping between hwirq and IRQ numbers on
+The irq_domain library adds a mapping between hwirq and IRQ numbers on
 top of the irq_alloc_desc*() API.  An irq_domain to manage mapping is
 preferred over interrupt controller drivers open coding their own
 reverse mapping scheme.
@@ -38,7 +38,7 @@ irq_domain also implements translation from an abstract irq_fwspec
 structure to hwirq numbers (Device Tree and ACPI GSI so far), and can
 be easily extended to support other IRQ topology data sources.
 
-irq_domain usage
+irq_domain Usage
 ================
 
 An interrupt controller driver creates and registers an irq_domain by
@@ -76,7 +76,7 @@ If the driver has the Linux IRQ number or the irq_data pointer, and
 needs to know the associated hwirq number (such as in the irq_chip
 callbacks) then it can be directly obtained from irq_data->hwirq.
 
-Types of irq_domain mappings
+Types of irq_domain Mappings
 ============================
 
 There are several mechanisms available for reverse mapping from hwirq
@@ -101,7 +101,7 @@ map are fixed time lookup for IRQ numbers, and irq_descs are only
 allocated for in-use IRQs.  The disadvantage is that the table must be
 as large as the largest possible hwirq number.
 
-The majority of drivers should use the linear map.
+The majority of drivers should use the Linear map.
 
 Tree
 ----
@@ -189,7 +189,7 @@ that the driver using the simple domain call irq_create_mapping()
 before any irq_find_mapping() since the latter will actually work
 for the static IRQ assignment case.
 
-Hierarchy IRQ domain
+Hierarchy IRQ Domain
 --------------------
 
 On some architectures, there may be multiple interrupt controllers