From: Teja Sai Charan B <tejaasaye@gmail.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-rtc@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Teja Sai Charan Bellamkonda <tejaasaye@gmail.com>
Subject: [PATCH v2] dt-bindings: rtc: Convert rtc-cmos binding to YAML
Date: Tue, 16 Jun 2026 14:26:58 +0530 [thread overview]
Message-ID: <20260616085659.12809-1-tejaasaye@gmail.com> (raw)
From: Teja Sai Charan Bellamkonda <tejaasaye@gmail.com>
Convert the rtc-cmos devicetree bindings to dt schema.
Signed-off-by: Teja Sai Charan Bellamkonda <tejaasaye@gmail.com>
---
Changes in v2:
- Allow intel,ce4100-rtc compatible used by existing DTS files
---
.../devicetree/bindings/rtc/rtc-cmos.txt | 27 ---------
.../devicetree/bindings/rtc/rtc-cmos.yaml | 60 +++++++++++++++++++
result.txt | 17 ++++++
3 files changed, 77 insertions(+), 27 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/rtc/rtc-cmos.txt
create mode 100644 Documentation/devicetree/bindings/rtc/rtc-cmos.yaml
create mode 100644 result.txt
diff --git a/Documentation/devicetree/bindings/rtc/rtc-cmos.txt b/Documentation/devicetree/bindings/rtc/rtc-cmos.txt
deleted file mode 100644
index 7d7b5f6bda65..000000000000
--- a/Documentation/devicetree/bindings/rtc/rtc-cmos.txt
+++ /dev/null
@@ -1,27 +0,0 @@
- Motorola mc146818 compatible RTC
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Required properties:
- - compatible : "motorola,mc146818"
- - reg : should contain registers location and length.
-
-Optional properties:
- - interrupts : should contain interrupt.
- - ctrl-reg : Contains the initial value of the control register also
- called "Register B".
- - freq-reg : Contains the initial value of the frequency register also
- called "Register A".
-
-"Register A" and "B" are usually initialized by the firmware (BIOS for
-instance). If this is not done, it can be performed by the driver.
-
-ISA Example:
-
- rtc@70 {
- compatible = "motorola,mc146818";
- interrupts = <8 3>;
- interrupt-parent = <&ioapic1>;
- ctrl-reg = <2>;
- freq-reg = <0x26>;
- reg = <1 0x70 2>;
- };
diff --git a/Documentation/devicetree/bindings/rtc/rtc-cmos.yaml b/Documentation/devicetree/bindings/rtc/rtc-cmos.yaml
new file mode 100644
index 000000000000..ba4812778115
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-cmos.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/rtc-cmos.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Motorola mc146818 compatible RTC
+
+maintainers:
+ - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+properties:
+ compatible:
+ oneOf:
+ - const: motorola,mc146818
+
+ - items:
+ - const: intel,ce4100-rtc
+ - const: motorola,mc146818
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ ctrl-reg:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Initial value of the control register
+ (also known as Register B).
+
+ freq-reg:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Initial value of the frequency register
+ (also known as Register A).
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ bus {
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ rtc@70 {
+ compatible = "motorola,mc146818";
+ reg = <1 0x70 2>;
+
+ interrupts = <8 3>;
+
+ ctrl-reg = <2>;
+ freq-reg = <0x26>;
+ };
+ };
diff --git a/result.txt b/result.txt
new file mode 100644
index 000000000000..5e90660b93ec
--- /dev/null
+++ b/result.txt
@@ -0,0 +1,17 @@
+arch/x86/kernel/x86_init.c:42: { .compatible = "motorola,mc146818" },
+arch/x86/platform/ce4100/falconfalls.dts:420: compatible = "intel,ce4100-rtc", "motorola,mc146818";
+arch/mips/boot/dts/loongson/rs780e-pch.dtsi:31: compatible = "motorola,mc146818";
+arch/mips/boot/dts/mti/malta.dts:110: compatible = "motorola,mc146818";
+arch/alpha/kernel/rtc.c:25: * We don't want to use the rtc-cmos driver, because we don't want to support
+drivers/built-in.a:1031:rtc/rtc-cmos.o/
+drivers/rtc/built-in.a:11:rtc-cmos.o/
+drivers/rtc/.rtc-mc146818-lib.o.cmd:1:savedcmd_drivers/rtc/rtc-mc146818-lib.o := gcc -Wp,-MMD,drivers/rtc/.rtc-mc146818-lib.o.d -nostdinc -I./arch/x86/include -I./arch/x86/include/generated -I./include -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-sse4a -fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -march=x86-64 -mtune=generic -mno-red-zone -mcmodel=kernel -mstack-protector-guard-reg=gs -mstack-protector-guard-symbol=__ref_stack_chk_guard -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables -mharden-sls=all -fpatchable-function-entry=16,16 -fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races -fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero -fno-stack-clash-protection -fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -falign-functions=16 -fstrict-flex-arrays=3 -fms-extensions -fno-strict-overflow -fno-stack-check -fconserve-stack -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main -Wno-dangling-pointer -Wvla-larger-than=1 -Wno-pointer-sign -Wcast-function-type -Wno-array-bounds -Wno-stringop-overflow -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -Wenum-conversion -Wunused -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-packed-not-aligned -Wno-format-overflow -Wno-format-truncation -Wno-stringop-truncation -Wno-override-init -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -g -gdwarf-5 -fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum -DKBUILD_MODFILE='"drivers/rtc/rtc-mc146818-lib"' -DKBUILD_BASENAME='"rtc_mc146818_lib"' -DKBUILD_MODNAME='"rtc_mc146818_lib"' -D__KBUILD_MODNAME=rtc_mc146818_lib -c -o drivers/rtc/rtc-mc146818-lib.o drivers/rtc/rtc-mc146818-lib.c
+drivers/rtc/.built-in.a.cmd:1:savedcmd_drivers/rtc/built-in.a := rm -f drivers/rtc/built-in.a; printf "drivers/rtc/%s " lib.o class.o interface.o nvmem.o dev.o proc.o sysfs.o rtc-mc146818-lib.o rtc-cmos.o | xargs ar cDPrST drivers/rtc/built-in.a
+drivers/rtc/Kconfig:1065: will be called rtc-cmos.
+drivers/rtc/Makefile:45:obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o
+drivers/rtc/.rtc-cmos.o.cmd:1:savedcmd_drivers/rtc/rtc-cmos.o := gcc -Wp,-MMD,drivers/rtc/.rtc-cmos.o.d -nostdinc -I./arch/x86/include -I./arch/x86/include/generated -I./include -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-sse4a -fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -march=x86-64 -mtune=generic -mno-red-zone -mcmodel=kernel -mstack-protector-guard-reg=gs -mstack-protector-guard-symbol=__ref_stack_chk_guard -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables -mharden-sls=all -fpatchable-function-entry=16,16 -fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races -fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero -fno-stack-clash-protection -fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -falign-functions=16 -fstrict-flex-arrays=3 -fms-extensions -fno-strict-overflow -fno-stack-check -fconserve-stack -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main -Wno-dangling-pointer -Wvla-larger-than=1 -Wno-pointer-sign -Wcast-function-type -Wno-array-bounds -Wno-stringop-overflow -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -Wenum-conversion -Wunused -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-packed-not-aligned -Wno-format-overflow -Wno-format-truncation -Wno-stringop-truncation -Wno-override-init -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -g -gdwarf-5 -fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum -DKBUILD_MODFILE='"drivers/rtc/rtc-cmos"' -DKBUILD_BASENAME='"rtc_cmos"' -DKBUILD_MODNAME='"rtc_cmos"' -D__KBUILD_MODNAME=rtc_cmos -c -o drivers/rtc/rtc-cmos.o drivers/rtc/rtc-cmos.c
+drivers/rtc/.rtc-cmos.o.cmd:3:source_drivers/rtc/rtc-cmos.o := drivers/rtc/rtc-cmos.c
+drivers/rtc/.rtc-cmos.o.cmd:5:deps_drivers/rtc/rtc-cmos.o := \
+drivers/rtc/.rtc-cmos.o.cmd:1372:drivers/rtc/rtc-cmos.o: $(deps_drivers/rtc/rtc-cmos.o)
+drivers/rtc/.rtc-cmos.o.cmd:1374:$(deps_drivers/rtc/rtc-cmos.o):
+drivers/rtc/rtc-cmos.c:1382: .compatible = "motorola,mc146818",
--
2.43.0
reply other threads:[~2026-06-16 8:57 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260616085659.12809-1-tejaasaye@gmail.com \
--to=tejaasaye@gmail.com \
--cc=alexandre.belloni@bootlin.com \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=krzk+dt@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rtc@vger.kernel.org \
--cc=robh@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox