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Message-Id: <20210701194135.18847-2-alexander.helms.jy@renesas.com>
Date: Thu, 1 Jul 2021 12:41:34 -0700
From: Alex Helms <alexander.helms.jy@...esas.com>
To: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-clk@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Cc: robh+dt@...nel.org, sboyd@...nel.org, mturquette@...libre.com,
geert+renesas@...der.be, alexander.helms.jy@...esas.com,
david.cater.jc@...esas.com
Subject: [PATCH 1/2] dt-bindings: Add binding for Renesas 8T49N241
Renesas 8T49N241 has 4 outputs, 1 integral and 3 fractional dividers.
The 8T49N241 accepts up to two differential or single-ended input clocks
and a fundamental-mode crystal input. The internal PLL can lock to either
of the input reference clocks or to the crystal to behave as a frequency
synthesizer.
Signed-off-by: Alex Helms <alexander.helms.jy@...esas.com>
---
.../bindings/clock/renesas,8t49n241.yaml | 183 ++++++++++++++++++
MAINTAINERS | 6 +
2 files changed, 189 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/renesas,8t49n241.yaml
diff --git a/Documentation/devicetree/bindings/clock/renesas,8t49n241.yaml b/Documentation/devicetree/bindings/clock/renesas,8t49n241.yaml
new file mode 100644
index 000000000..d817ec46d
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/renesas,8t49n241.yaml
@@ -0,0 +1,183 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/renesas,8t49n24x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Binding for Renesas 8T49N241 Universal Frequency Translator
+
+description: |
+ The 8T49N241 has one fractional-feedback PLL that can be used as a
+ jitter attenuator and frequency translator. It is equipped with one
+ integer and three fractional output dividers, allowing the generation
+ of up to four different output frequencies, ranging from 8kHz to 1GHz.
+ These frequencies are completely independent of each other, the input
+ reference frequencies and the crystal reference frequency. The device
+ places virtually no constraints on input to output frequency conversion,
+ supporting all FEC rates, including the new revision of ITU-T
+ Recommendation G.709 (2009), most with 0ppm conversion error.
+ The outputs may select among LVPECL, LVDS, HCSL or LVCMOS output levels.
+
+ The driver can read a full register map from the DT, and will use that
+ register map to initialize the attached part (via I2C) when the system
+ boots. Any configuration not supported by the common clock framework
+ must be done via the full register map, including optimized settings.
+
+ The 8T49N241 accepts up to two differential or single-ended input clocks
+ and a fundamental-mode crystal input. The internal PLL can lock to either
+ of the input reference clocks or just to the crystal to behave as a
+ frequency synthesizer. The PLL can use the second input for redundant
+ backup of the primary input reference, but in this case, both input clock
+ references must be related in frequency.
+
+ All outputs are currently assumed to be LVDS, unless overridden in the
+ full register map in the DT.
+
+maintainers:
+ - Alex Helms <alexander.helms.jy@...esas.com>
+ - David Cater <david.cater.jc@...esas.com>
+
+properties:
+ compatible:
+ enum:
+ - 8t49n241
+
+ reg:
+ description: I2C device address
+ enum: [ 0x7c, 0x6c, 0x7d, 0x6d, 0x7e, 0x6e, 0x7f, 0x6f ]
+
+ '#clock-cells':
+ const: 1
+
+ clock-names:
+ description: Name of the input clock
+ minItems: 1
+ maxItems: 3
+ items:
+ enum: [ input-xtal, input-clk0, input-clk1 ]
+
+ clocks:
+ minItems: 1
+ maxItems: 3
+
+required:
+ - compatible
+ - reg
+ - '#clock-cells'
+ - clocks
+ - clock-names
+
+additionalProperties: false
+
+examples:
+ - |
+ /* 25MHz reference clock */
+ input_clk0: input_clk0 {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <25000000>;
+ };
+
+ i2c@0 {
+ reg = <0x0 0x100>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ renesas8t49n241_1: clock-generator@6c {
+ compatible = "renesas,8t49n241";
+ reg = <0x6c>;
+ #clock-cells = <1>;
+
+ clocks = <&input_clk0>;
+ clock-names = "input-clk0";
+ };
+ };
+
+ /* Consumer referencing the 8T49N241 Q1 */
+ consumer {
+ /* ... */
+ clocks = <&renesas8t49n241_1 1>;
+ /* ... */
+ };
+ - |
+ /* 40MHz crystal */
+ input_xtal: input_xtal {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <40000000>;
+ };
+
+ i2c@0 {
+ reg = <0x0 0x100>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ renesas8t49n241_2: clock-generator@6c {
+ compatible = "renesas,8t49n241";
+ reg = <0x6c>;
+ #clock-cells = <1>;
+
+ clocks = <&input_xtal>;
+ clock-names = "input-xtal";
+
+ settings=[
+ 09 50 00 60 67 C5 6C FF 03 00 30 00 00 01 00 00
+ 01 07 00 00 07 00 00 77 6D 06 00 00 00 00 00 FF
+ FF FF FF 00 3F 00 2A 00 16 33 33 00 01 00 00 D0
+ 00 00 00 00 00 00 00 00 00 04 00 00 00 02 00 00
+ 00 00 00 00 00 00 00 17 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 D7 0A 2B 20 00 00 00 0B
+ 00 00 00 00 00 00 00 00 00 00 27 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ C3 00 08 01 00 00 00 00 00 00 00 00 00 30 00 00
+ 00 0A 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 85 00 00 9C 01 D4 02 71 07 00 00 00
+ 00 83 00 10 02 08 8C
+ ];
+ };
+ };
+
+ /* Consumer referencing the 8T49N241 Q1 */
+ consumer {
+ /* ... */
+ clocks = <&renesas8t49n241_2 1>;
+ /* ... */
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 0cce91cd5..882d79ead 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15575,6 +15575,12 @@ F: include/linux/rpmsg/
F: include/uapi/linux/rpmsg.h
F: samples/rpmsg/
+RENESAS 8T49N24X DRIVER
+M: Alex Helms <alexander.helms.jy@...esas.com>
+M: David Cater <david.cater.jc@...esas.com>
+S: Odd Fixes
+F: Documentation/devicetree/bindings/clock/renesas,8t49n241.yaml
+
RENESAS CLOCK DRIVERS
M: Geert Uytterhoeven <geert+renesas@...der.be>
L: linux-renesas-soc@...r.kernel.org
--
2.30.2
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