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Message-Id: <20250315-fslpmc-yaml-v1-1-10ba354a85c2@posteo.net>
Date: Sat, 15 Mar 2025 18:27:05 +0100
From: J. Neuschäfer via B4 Relay <devnull+j.ne.posteo.net@...nel.org>
To: Crystal Wood <oss@...error.net>,
Madhavan Srinivasan <maddy@...ux.ibm.com>,
Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Naveen N Rao <naveen@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
J. Neuschäfer <j.ne@...teo.net>
Subject: [PATCH] dt-bindings: powerpc: Convert fsl/pmc.txt to YAML
From: "J. Neuschäfer" <j.ne@...teo.net>
This patch rewrites pmc.txt into YAML format. Descriptive texts are
expanded or shortened in a few places to better fit today's conventions.
The list of compatible strings (and combinations of them) is based on
existing device trees in arch/powerpc as well as compatible strings
already mentioned in the plain-text version of the binding.
One thing I didn't handle are soc-clk@... nodes as seen in
Documentation/devicetree/bindings/powerpc/fsl/pmc.yaml.
Signed-off-by: J. Neuschäfer <j.ne@...teo.net>
---
.../devicetree/bindings/powerpc/fsl/pmc.txt | 63 --------
.../devicetree/bindings/powerpc/fsl/pmc.yaml | 159 +++++++++++++++++++++
2 files changed, 159 insertions(+), 63 deletions(-)
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/pmc.txt b/Documentation/devicetree/bindings/powerpc/fsl/pmc.txt
deleted file mode 100644
index 07256b7ffcaab2ba57b33cf279df45d830ce33b3..0000000000000000000000000000000000000000
--- a/Documentation/devicetree/bindings/powerpc/fsl/pmc.txt
+++ /dev/null
@@ -1,63 +0,0 @@
-* Power Management Controller
-
-Properties:
-- compatible: "fsl,<chip>-pmc".
-
- "fsl,mpc8349-pmc" should be listed for any chip whose PMC is
- compatible. "fsl,mpc8313-pmc" should also be listed for any chip
- whose PMC is compatible, and implies deep-sleep capability.
-
- "fsl,mpc8548-pmc" should be listed for any chip whose PMC is
- compatible. "fsl,mpc8536-pmc" should also be listed for any chip
- whose PMC is compatible, and implies deep-sleep capability.
-
- "fsl,mpc8641d-pmc" should be listed for any chip whose PMC is
- compatible; all statements below that apply to "fsl,mpc8548-pmc" also
- apply to "fsl,mpc8641d-pmc".
-
- Compatibility does not include bit assignments in SCCR/PMCDR/DEVDISR; these
- bit assignments are indicated via the sleep specifier in each device's
- sleep property.
-
-- reg: For devices compatible with "fsl,mpc8349-pmc", the first resource
- is the PMC block, and the second resource is the Clock Configuration
- block.
-
- For devices compatible with "fsl,mpc8548-pmc", the first resource
- is a 32-byte block beginning with DEVDISR.
-
-- interrupts: For "fsl,mpc8349-pmc"-compatible devices, the first
- resource is the PMC block interrupt.
-
-- fsl,mpc8313-wakeup-timer: For "fsl,mpc8313-pmc"-compatible devices,
- this is a phandle to an "fsl,gtm" node on which timer 4 can be used as
- a wakeup source from deep sleep.
-
-Sleep specifiers:
-
- fsl,mpc8349-pmc: Sleep specifiers consist of one cell. For each bit
- that is set in the cell, the corresponding bit in SCCR will be saved
- and cleared on suspend, and restored on resume. This sleep controller
- supports disabling and resuming devices at any time.
-
- fsl,mpc8536-pmc: Sleep specifiers consist of three cells, the third of
- which will be ORed into PMCDR upon suspend, and cleared from PMCDR
- upon resume. The first two cells are as described for fsl,mpc8578-pmc.
- This sleep controller only supports disabling devices during system
- sleep, or permanently.
-
- fsl,mpc8548-pmc: Sleep specifiers consist of one or two cells, the
- first of which will be ORed into DEVDISR (and the second into
- DEVDISR2, if present -- this cell should be zero or absent if the
- hardware does not have DEVDISR2) upon a request for permanent device
- disabling. This sleep controller does not support configuring devices
- to disable during system sleep (unless supported by another compatible
- match), or dynamically.
-
-Example:
-
- power@b00 {
- compatible = "fsl,mpc8313-pmc", "fsl,mpc8349-pmc";
- reg = <0xb00 0x100 0xa00 0x100>;
- interrupts = <80 8>;
- };
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/pmc.yaml b/Documentation/devicetree/bindings/powerpc/fsl/pmc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..bb2db8adb74c54fec5d07393573f156c63a9e886
--- /dev/null
+++ b/Documentation/devicetree/bindings/powerpc/fsl/pmc.yaml
@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/powerpc/fsl/pmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Power Management Controller
+
+maintainers:
+ - J. Neuschäfer <j.ne@...teo.net>
+
+description: |
+ The Power Management Controller in several MPC8xxx SoCs helps save power by
+ controlling chip-wide low-power states as well as peripheral clock gating.
+
+ Sleep of peripheral devices is configured by the `sleep` property, for
+ example `sleep = <&pmc 0x00000030>`. Any cells after the &pmc phandle are
+ called a sleep specifier.
+
+ For "fsl,mpc8349-pmc", sleep specifiers consist of one cell. For each bit that
+ is set in the cell, the corresponding bit in SCCR will be saved and cleared
+ on suspend, and restored on resume. This sleep controller supports disabling
+ and resuming devices at any time.
+
+ For "fsl,mpc8536-pmc", sleep specifiers consist of three cells, the third of
+ which will be ORed into PMCDR upon suspend, and cleared from PMCDR upon
+ resume. The first two cells are as described for fsl,mpc8548-pmc. This
+ sleep controller only supports disabling devices during system sleep, or
+ permanently.
+
+ For "fsl,mpc8548-pmc" or "fsl,mpc8641d-pmc", Sleep specifiers consist of one
+ or two cells, the first of which will be ORed into DEVDISR (and the second
+ into DEVDISR2, if present -- this cell should be zero or absent if the
+ hardware does not have DEVDISR2) upon a request for permanent device
+ disabling. This sleep controller does not support configuring devices to
+ disable during system sleep (unless supported by another compatible match),
+ or dynamically.
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - const: fsl,mpc8315-pmc
+ - const: fsl,mpc8313-pmc
+ - const: fsl,mpc8349-pmc
+
+ - items:
+ - enum:
+ - fsl,mpc8313-pmc
+ - fsl,mpc8323-pmc
+ - fsl,mpc8360-pmc
+ - fsl,mpc8377-pmc
+ - fsl,mpc8378-pmc
+ - fsl,mpc8379-pmc
+ - const: fsl,mpc8349-pmc
+
+ - items:
+ - const: fsl,p1022-pmc
+ - const: fsl,mpc8536-pmc
+ - const: fsl,mpc8548-pmc
+
+ - items:
+ - enum:
+ - fsl,mpc8536-pmc
+ - fsl,mpc8568-pmc
+ - fsl,mpc8569-pmc
+ - const: fsl,mpc8548-pmc
+
+ - const: fsl,mpc8548-pmc
+
+ - const: fsl,mpc8641d-pmc
+
+ description: |
+ "fsl,mpc8349-pmc" should be listed for any chip whose PMC is
+ compatible. "fsl,mpc8313-pmc" should also be listed for any chip
+ whose PMC is compatible, and implies deep-sleep capability.
+
+ "fsl,mpc8548-pmc" should be listed for any chip whose PMC is
+ compatible. "fsl,mpc8536-pmc" should also be listed for any chip
+ whose PMC is compatible, and implies deep-sleep capability.
+
+ "fsl,mpc8641d-pmc" should be listed for any chip whose PMC is
+ compatible; all statements below that apply to "fsl,mpc8548-pmc" also
+ apply to "fsl,mpc8641d-pmc".
+
+ Compatibility does not include bit assignments in SCCR/PMCDR/DEVDISR; these
+ bit assignments are indicated via the sleep specifier in each device's
+ sleep property.
+
+ reg:
+ minItems: 1
+ maxItems: 2
+
+ interrupts:
+ maxItems: 1
+
+ fsl,mpc8313-wakeup-timer:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ For "fsl,mpc8313-pmc"-compatible devices, this is a phandle to an
+ "fsl,gtm" node on which timer 4 can be used as a wakeup source from deep
+ sleep.
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: fsl,mpc8349-pmc
+ then:
+ properties:
+ reg:
+ items:
+ - description: PMC block
+ - description: Clock Configuration block
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - fsl,mpc8548-pmc
+ - fsl,mpc8641d-pmc
+ then:
+ properties:
+ reg:
+ items:
+ - description: 32-byte block beginning with DEVDISR
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ pmc: power@b00 {
+ compatible = "fsl,mpc8377-pmc", "fsl,mpc8349-pmc";
+ reg = <0xb00 0x100>, <0xa00 0x100>;
+ interrupts = <80 IRQ_TYPE_LEVEL_LOW>;
+ };
+
+ sata@...00 {
+ compatible = "fsl,mpc8377-sata", "fsl,pq-sata";
+ reg = <0x19000 0x1000>;
+ interrupts = <45 IRQ_TYPE_LEVEL_LOW>;
+ sleep = <&pmc 0x00000030>;
+ };
+
+ - |
+ power@...70 {
+ compatible = "fsl,mpc8548-pmc";
+ reg = <0xe0070 0x20>;
+ };
+
+...
---
base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b
change-id: 20250226-fslpmc-yaml-90dc69fb7d2a
Best regards,
--
J. Neuschäfer <j.ne@...teo.net>
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