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Message-ID: <20250804222034.4083410-1-robh@kernel.org>
Date: Mon, 4 Aug 2025 17:20:32 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Mike Looijmans <mike.looijmans@...ic.nl>
Cc: linux-clk@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: clock: Convert silabs,si5341 to DT schema
Convert the Silicon Labs SI5341 binding to DT schema format. It's a
straight-forward conversion.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
.../bindings/clock/silabs,si5341.txt | 175 --------------
.../bindings/clock/silabs,si5341.yaml | 217 ++++++++++++++++++
2 files changed, 217 insertions(+), 175 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/clock/silabs,si5341.txt
create mode 100644 Documentation/devicetree/bindings/clock/silabs,si5341.yaml
diff --git a/Documentation/devicetree/bindings/clock/silabs,si5341.txt b/Documentation/devicetree/bindings/clock/silabs,si5341.txt
deleted file mode 100644
index ce55aba0ce22..000000000000
--- a/Documentation/devicetree/bindings/clock/silabs,si5341.txt
+++ /dev/null
@@ -1,175 +0,0 @@
-Binding for Silicon Labs Si5340, Si5341 Si5342, Si5344 and Si5345 programmable
-i2c clock generator.
-
-Reference
-[1] Si5341 Data Sheet
- https://www.silabs.com/documents/public/data-sheets/Si5341-40-D-DataSheet.pdf
-[2] Si5341 Reference Manual
- https://www.silabs.com/documents/public/reference-manuals/Si5341-40-D-RM.pdf
-[3] Si5345 Reference Manual
- https://www.silabs.com/documents/public/reference-manuals/Si5345-44-42-D-RM.pdf
-
-The Si5341 and Si5340 are programmable i2c clock generators with up to 10 output
-clocks. The chip contains a PLL that sources 5 (or 4) multisynth clocks, which
-in turn can be directed to any of the 10 (or 4) outputs through a divider.
-The internal structure of the clock generators can be found in [2].
-The Si5345 is similar to the Si5341 with the addition of fractional input
-dividers and automatic input selection, as described in [3].
-The Si5342 and Si5344 are smaller versions of the Si5345, with 2 or 4 outputs.
-
-The driver can be used in "as is" mode, reading the current settings from the
-chip at boot, in case you have a (pre-)programmed device. If the PLL is not
-configured when the driver probes, it assumes the driver must fully initialize
-it.
-
-The device type, speed grade and revision are determined runtime by probing.
-
-The driver currently does not support any fancy input configurations. They can
-still be programmed into the chip and the driver will leave them "as is".
-
-==I2C device node==
-
-Required properties:
-- compatible: shall be one of the following:
- "silabs,si5340" - Si5340 A/B/C/D
- "silabs,si5341" - Si5341 A/B/C/D
- "silabs,si5342" - Si5342 A/B/C/D
- "silabs,si5344" - Si5344 A/B/C/D
- "silabs,si5345" - Si5345 A/B/C/D
-- reg: i2c device address, usually 0x74
-- #clock-cells: from common clock binding; shall be set to 2.
- The first value is "0" for outputs, "1" for synthesizers.
- The second value is the output or synthesizer index.
-- clocks: from common clock binding; list of parent clock handles,
- corresponding to inputs. Use a fixed clock for the "xtal" input.
- At least one must be present.
-- clock-names: One of: "xtal", "in0", "in1", "in2"
-
-Optional properties:
-- vdd-supply: Regulator node for VDD
-- vdda-supply: Regulator node for VDDA
-- vdds-supply: Regulator node for VDDS
-- silabs,pll-m-num, silabs,pll-m-den: Numerator and denominator for PLL
- feedback divider. Must be such that the PLL output is in the valid range. For
- example, to create 14GHz from a 48MHz xtal, use m-num=14000 and m-den=48. Only
- the fraction matters, using 3500 and 12 will deliver the exact same result.
- If these are not specified, and the PLL is not yet programmed when the driver
- probes, the PLL will be set to 14GHz.
-- silabs,reprogram: When present, the driver will always assume the device must
- be initialized, and always performs the soft-reset routine. Since this will
- temporarily stop all output clocks, don't do this if the chip is generating
- the CPU clock for example.
-- silabs,xaxb-ext-clk: When present, indicates that the XA/XB pins are used
- in EXTCLK (external reference clock) rather than XTAL (crystal) mode.
-- interrupts: Interrupt for INTRb pin.
-- silabs,iovdd-33: When present, indicates that the I2C lines are using 3.3V
- rather than 1.8V thresholds.
-- vddoX-supply (where X is an output index): Regulator node for VDDO for the
- specified output. The driver selects the output VDD_SEL setting based on this
- voltage.
-- #address-cells: shall be set to 1.
-- #size-cells: shall be set to 0.
-
-
-== Child nodes: Outputs ==
-
-The child nodes list the output clocks.
-
-Each of the clock outputs can be overwritten individually by using a child node.
-If a child node for a clock output is not set, the configuration remains
-unchanged.
-
-Required child node properties:
-- reg: number of clock output.
-
-Optional child node properties:
-- silabs,format: Output format, one of:
- 1 = differential (defaults to LVDS levels)
- 2 = low-power (defaults to HCSL levels)
- 4 = LVCMOS
-- silabs,common-mode: Manually override output common mode, see [2] for values
-- silabs,amplitude: Manually override output amplitude, see [2] for values
-- silabs,synth-master: boolean. If present, this output is allowed to change the
- multisynth frequency dynamically.
-- silabs,silabs,disable-high: boolean. If set, the clock output is driven HIGH
- when disabled, otherwise it's driven LOW.
-
-==Example==
-
-/* 48MHz reference crystal */
-ref48: ref48M {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <48000000>;
-};
-
-i2c-master-node {
- /* Programmable clock (for logic) */
- si5341: clock-generator@74 {
- reg = <0x74>;
- compatible = "silabs,si5341";
- #clock-cells = <2>;
- #address-cells = <1>;
- #size-cells = <0>;
- clocks = <&ref48>;
- clock-names = "xtal";
-
- silabs,pll-m-num = <14000>; /* PLL at 14.0 GHz */
- silabs,pll-m-den = <48>;
- silabs,reprogram; /* Chips are not programmed, always reset */
-
- out@0 {
- reg = <0>;
- silabs,format = <1>; /* LVDS 3v3 */
- silabs,common-mode = <3>;
- silabs,amplitude = <3>;
- silabs,synth-master;
- };
-
- /*
- * Output 6 configuration:
- * LVDS 1v8
- */
- out@6 {
- reg = <6>;
- silabs,format = <1>; /* LVDS 1v8 */
- silabs,common-mode = <13>;
- silabs,amplitude = <3>;
- };
-
- /*
- * Output 8 configuration:
- * HCSL 3v3
- */
- out@8 {
- reg = <8>;
- silabs,format = <2>;
- silabs,common-mode = <11>;
- silabs,amplitude = <3>;
- };
- };
-};
-
-some-video-node {
- /* Standard clock bindings */
- clock-names = "pixel";
- clocks = <&si5341 0 7>; /* Output 7 */
-
- /* Set output 7 to use syntesizer 3 as its parent */
- assigned-clocks = <&si5341 0 7>, <&si5341 1 3>;
- assigned-clock-parents = <&si5341 1 3>;
- /* Set output 7 to 148.5 MHz using a synth frequency of 594 MHz */
- assigned-clock-rates = <148500000>, <594000000>;
-};
-
-some-audio-node {
- clock-names = "i2s-clk";
- clocks = <&si5341 0 0>;
- /*
- * since output 0 is a synth-master, the synth will be automatically set
- * to an appropriate frequency when the audio driver requests another
- * frequency. We give control over synth 2 to this output here.
- */
- assigned-clocks = <&si5341 0 0>;
- assigned-clock-parents = <&si5341 1 2>;
-};
diff --git a/Documentation/devicetree/bindings/clock/silabs,si5341.yaml b/Documentation/devicetree/bindings/clock/silabs,si5341.yaml
new file mode 100644
index 000000000000..b4f7efdf0b7b
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/silabs,si5341.yaml
@@ -0,0 +1,217 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/silabs,si5341.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Silicon Labs Si5340/1/2/4/5 programmable i2c clock generator
+
+maintainers:
+ - Mike Looijmans <mike.looijmans@...ic.nl>
+
+description: >
+ Silicon Labs Si5340, Si5341 Si5342, Si5344 and Si5345 programmable i2c clock
+ generator.
+
+ Reference
+ [1] Si5341 Data Sheet
+ https://www.silabs.com/documents/public/data-sheets/Si5341-40-D-DataSheet.pdf
+ [2] Si5341 Reference Manual
+ https://www.silabs.com/documents/public/reference-manuals/Si5341-40-D-RM.pdf
+ [3] Si5345 Reference Manual
+ https://www.silabs.com/documents/public/reference-manuals/Si5345-44-42-D-RM.pdf
+
+ The Si5341 and Si5340 are programmable i2c clock generators with up to 10 output
+ clocks. The chip contains a PLL that sources 5 (or 4) multisynth clocks, which
+ in turn can be directed to any of the 10 (or 4) outputs through a divider.
+ The internal structure of the clock generators can be found in [2].
+ The Si5345 is similar to the Si5341 with the addition of fractional input
+ dividers and automatic input selection, as described in [3].
+ The Si5342 and Si5344 are smaller versions of the Si5345, with 2 or 4 outputs.
+
+ The driver can be used in "as is" mode, reading the current settings from the
+ chip at boot, in case you have a (pre-)programmed device. If the PLL is not
+ configured when the driver probes, it assumes the driver must fully initialize
+ it.
+
+ The device type, speed grade and revision are determined runtime by probing.
+
+properties:
+ compatible:
+ enum:
+ - silabs,si5340
+ - silabs,si5341
+ - silabs,si5342
+ - silabs,si5344
+ - silabs,si5345
+
+ reg:
+ maxItems: 1
+
+ "#clock-cells":
+ const: 2
+ description: >
+ The first value is "0" for outputs, "1" for synthesizers.
+
+ The second value is the output or synthesizer index.
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ clocks:
+ minItems: 1
+ maxItems: 4
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: xtal
+ - const: in0
+ - const: in1
+ - const: in2
+
+ interrupts:
+ maxItems: 1
+ description: Interrupt for INTRb pin
+
+ vdd-supply:
+ description: Regulator node for VDD
+
+ vdda-supply:
+ description: Regulator node for VDDA
+
+ vdds-supply:
+ description: Regulator node for VDDS
+
+ silabs,pll-m-num:
+ description:
+ Numerator for PLL feedback divider. Must be such that the PLL output is in
+ the valid range. For example, to create 14GHz from a 48MHz xtal, use
+ m-num=14000 and m-den=48. Only the fraction matters, using 3500 and 12
+ will deliver the exact same result. If these are not specified, and the
+ PLL is not yet programmed when the driver probes, the PLL will be set to
+ 14GHz.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ silabs,pll-m-den:
+ description: Denominator for PLL feedback divider
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ silabs,reprogram:
+ description: Always perform soft-reset and reinitialize PLL
+ type: boolean
+
+ silabs,xaxb-ext-clk:
+ description: Use XA/XB pins as external reference clock
+ type: boolean
+
+ silabs,iovdd-33:
+ description: I2C lines use 3.3V thresholds
+ type: boolean
+
+patternProperties:
+ "^vddo[0-9]-supply$": true
+
+ "^out@[0-9]$":
+ description: >
+ Output-specific override nodes
+
+ Each of the clock outputs can be overwritten individually by using a child
+ node. If a child node for a clock output is not set, the configuration
+ remains unchanged.
+ type: object
+ additionalProperties: false
+
+ properties:
+ reg:
+ description: Number of clock output
+ maximum: 9
+
+ silabs,format:
+ description: Output format
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 2, 4]
+
+ silabs,common-mode:
+ description: Override output common mode
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ silabs,amplitude:
+ description: Override output amplitude
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ silabs,synth-master:
+ description: Allow dynamic multisynth rate control
+ type: boolean
+
+ silabs,disable-high:
+ description: Drive output HIGH when disabled
+ type: boolean
+
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+ - "#clock-cells"
+ - "#address-cells"
+ - "#size-cells"
+ - clocks
+ - clock-names
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ clock-generator@74 {
+ reg = <0x74>;
+ compatible = "silabs,si5341";
+ #clock-cells = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ clocks = <&ref48>;
+ clock-names = "xtal";
+
+ silabs,pll-m-num = <14000>; /* PLL at 14.0 GHz */
+ silabs,pll-m-den = <48>;
+ silabs,reprogram; /* Chips are not programmed, always reset */
+
+ out@0 {
+ reg = <0>;
+ silabs,format = <1>; /* LVDS 3v3 */
+ silabs,common-mode = <3>;
+ silabs,amplitude = <3>;
+ silabs,synth-master;
+ };
+
+ /*
+ * Output 6 configuration:
+ * LVDS 1v8
+ */
+ out@6 {
+ reg = <6>;
+ silabs,format = <1>; /* LVDS 1v8 */
+ silabs,common-mode = <13>;
+ silabs,amplitude = <3>;
+ };
+
+ /*
+ * Output 8 configuration:
+ * HCSL 3v3
+ */
+ out@8 {
+ reg = <8>;
+ silabs,format = <2>;
+ silabs,common-mode = <11>;
+ silabs,amplitude = <3>;
+ };
+ };
+ };
--
2.47.2
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