linux-kernel - [PATCH v4 2/3] dt-bindings: phy: Add Freescale i.MX8qm Mixel LVDS PHY binding

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Message-Id: <20220706034810.2352641-3-victor.liu@nxp.com>
Date:   Wed,  6 Jul 2022 11:48:09 +0800
From:   Liu Ying <victor.liu@....com>
To:     linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     kishon@...com, vkoul@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, krzysztof.kozlowski@...aro.org
Subject: [PATCH v4 2/3] dt-bindings: phy: Add Freescale i.MX8qm Mixel LVDS PHY binding

Add bindings for Mixel LVDS PHY found on Freescale i.MX8qm SoC.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Liu Ying <victor.liu@....com>
---
v3->v4:
* Add Krzysztof's R-b tag.

v2->v3:
* Change compatible string from 'mixel,lvds-phy' to
  'mixel,28fdsoi-lvds-1250-8ch-tx-pll'. (Krzysztof)
* Rename dt-binding file to 'fsl,imx8qm-lvds-phy.yaml'. (Krzysztof)

v1->v2:
* Set fsl,imx8qm-lvds-phy' and 'mixel,lvds-phy' as compatible's enum. (Krzysztof)
* Skip 'clock-names' property. (Krzysztof)
* Drop 'This patch' from commit message. (Krzysztof)

 .../bindings/phy/fsl,imx8qm-lvds-phy.yaml     | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/fsl,imx8qm-lvds-phy.yaml

diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8qm-lvds-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8qm-lvds-phy.yaml
new file mode 100644
index 000000000000..8767e48c71a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8qm-lvds-phy.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/fsl,imx8qm-lvds-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mixel LVDS PHY for Freescale i.MX8qm SoC
+
+maintainers:
+  - Liu Ying <victor.liu@....com>
+
+description: |
+  The Mixel LVDS PHY IP block is found on Freescale i.MX8qm SoC.
+  It converts two groups of four 7/10 bits of CMOS data into two
+  groups of four data lanes of LVDS data streams. A phase-locked
+  transmit clock is transmitted in parallel with each group of
+  data streams over a fifth LVDS link. Every cycle of the transmit
+  clock, 56/80 bits of input data are sampled and transmitted
+  through the two groups of LVDS data streams. Together with the
+  transmit clocks, the two groups of LVDS data streams form two
+  LVDS channels.
+
+  The Mixel LVDS PHY found on Freescale i.MX8qm SoC is controlled
+  by Control and Status Registers(CSR) module in the SoC. The CSR
+  module, as a system controller, contains the PHY's registers.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx8qm-lvds-phy
+      - mixel,28fdsoi-lvds-1250-8ch-tx-pll
+
+  "#phy-cells":
+    const: 1
+    description: |
+      Cell allows setting the LVDS channel index of the PHY.
+      Index 0 is for LVDS channel0 and index 1 is for LVDS channel1.
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - "#phy-cells"
+  - clocks
+  - power-domains
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    phy {
+        compatible = "fsl,imx8qm-lvds-phy";
+        #phy-cells = <1>;
+        clocks = <&clk IMX_SC_R_LVDS_0 IMX_SC_PM_CLK_PHY>;
+        power-domains = <&pd IMX_SC_R_LVDS_0>;
+    };
-- 
2.25.1