From: Michael Walle <michael@walle.cc>
To: linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Michael Walle <michael@walle.cc>
Subject: [PATCH v2 1/2] dt-bindings: clock: document the fsl-sai driver
Date: Tue, 10 Dec 2019 00:33:04 +0100 [thread overview]
Message-ID: <20191209233305.18619-1-michael@walle.cc> (raw)
Signed-off-by: Michael Walle <michael@walle.cc>
---
changes since v1:
- dual license gpl-2.0-only and bsd-2-clause
- add "additionalProperties: false"
- wrap example in soc {} node with correct #address-cells and #size-cells
.../bindings/clock/fsl,sai-clock.yaml | 55 +++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml
diff --git a/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml b/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml
new file mode 100644
index 000000000000..8fb2060ac47f
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bindings/clock/fsl,sai-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale SAI bitclock-as-a-clock binding
+
+maintainers:
+ - Michael Walle <michael@walle.cc>
+
+description: |
+ It is possible to use the BCLK pin of a SAI module as a generic clock
+ output. Some SoC are very constrained in their pin multiplexer
+ configuration. Eg. pins can only be changed groups. For example, on the
+ LS1028A SoC you can only enable SAIs in pairs. If you use only one SAI,
+ the second pins are wasted. Using this binding it is possible to use the
+ clock of the second SAI as a MCLK clock for an audio codec, for example.
+
+ This is a composite of a gated clock and a divider clock.
+
+properties:
+ compatible:
+ const: fsl,vf610-sai-clock
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ '#clock-cells':
+ const: 0
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ mclk: clock-mclk@f130080 {
+ compatible = "fsl,vf610-sai-clock";
+ reg = <0x0 0xf130080 0x0 0x80>;
+ #clock-cells = <0>;
+ clocks = <&parentclk>;
+ };
+ };
--
2.20.1
next reply other threads:[~2019-12-09 23:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 23:33 Michael Walle [this message]
2019-12-09 23:33 ` [PATCH v2 2/2] clk: fsl-sai: new driver Michael Walle
2019-12-24 8:05 ` Stephen Boyd
2020-01-01 15:15 ` Michael Walle
2020-01-02 8:09 ` Stephen Boyd
2020-01-03 9:00 ` Michael Walle
2019-12-11 14:28 ` [PATCH v2 1/2] dt-bindings: clock: document the fsl-sai driver Rob Herring
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