Upstream status: https://marc.info/?l=linux-doc&m=166861669723994&w=2

From 7edb5b278ee383ff9bed525329b2cdbe22317bf2 Mon Sep 17 00:00:00 2001
From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Date: Mon, 14 Nov 2022 22:51:11 -0500
Subject: [PATCH] doc: add texinfodocs and infodocs targets

Sphinx supports generating Texinfo sources and Info documentation,
which can be navigated easily and is convenient to search (via the
indexed nodes or anchors, for example).

This change also causes the html output to appear under its own output
sub-directory, which makes it easier to install, since it's clean from
.doctrees or other output formats.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
---
 Documentation/Makefile                     | 13 ++++++++++++-
 Documentation/userspace-api/media/Makefile |  3 ++-
 Makefile                                   |  2 +-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 64d44c1ecad3..bd8dac560633 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -93,7 +93,16 @@ quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
 
 htmldocs:
 	@$(srctree)/scripts/sphinx-pre-install --version-check
-	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
+	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),html,$(var)))
+
+texinfodocs:
+	@$(srctree)/scripts/sphinx-pre-install --version-check
+	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,texinfo,$(var),texinfo,$(var)))
+
+# Note: the 'info' Make target is generated by sphinx itself when
+# running the texinfodocs target define above.
+infodocs: texinfodocs
+	$(MAKE) -C $(BUILDDIR)/texinfo info
 
 linkcheckdocs:
 	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,linkcheck,$(var),,$(var)))
@@ -143,6 +152,8 @@ cleandocs:
 dochelp:
 	@echo  ' Linux kernel internal documentation in different formats from ReST:'
 	@echo  '  htmldocs        - HTML'
+	@echo  '  texinfodocs     - Texinfo'
+	@echo  '  infodocs        - Info'
 	@echo  '  latexdocs       - LaTeX'
 	@echo  '  pdfdocs         - PDF'
 	@echo  '  epubdocs        - EPUB'
diff --git a/Documentation/userspace-api/media/Makefile b/Documentation/userspace-api/media/Makefile
index 00922aa7efde..3d8aaf5c253b 100644
--- a/Documentation/userspace-api/media/Makefile
+++ b/Documentation/userspace-api/media/Makefile
@@ -47,10 +47,11 @@ $(BUILDDIR)/lirc.h.rst: ${UAPI}/lirc.h ${PARSER} $(SRC_DIR)/lirc.h.rst.exception
 
 # Media build rules
 
-.PHONY: all html epub xml latex
+.PHONY: all html texinfo epub xml latex
 
 all: $(IMGDOT) $(BUILDDIR) ${TARGETS}
 html: all
+texinfo: all
 epub: all
 xml: all
 latex: $(IMGPDF) all
diff --git a/Makefile b/Makefile
index 58cd4f5e1c3a..b3266c408b6c 100644
--- a/Makefile
+++ b/Makefile
@@ -1785,7 +1785,7 @@ $(help-board-dirs): help-%:
 # Documentation targets
 # ---------------------------------------------------------------------------
 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
-	       linkcheckdocs dochelp refcheckdocs
+	       linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
 PHONY += $(DOC_TARGETS)
 $(DOC_TARGETS):
 	$(Q)$(MAKE) $(build)=Documentation $@

base-commit: 81e7cfa3a9eb4ba6993a9c71772fdab21bc5d870
-- 
2.38.1