linux-kernel - [PATCH v4 1/5] dt-bindings: phy: cadence-torrent: Add optional input reference clock for PLL1

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Date: Thu, 4 Jan 2024 14:30:09 +0100
From: Swapnil Jakhade <sjakhade@...ence.com>
To: <vkoul@...nel.org>, <kishon@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-phy@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: <mparab@...ence.com>, <sjakhade@...ence.com>, <rogerq@...nel.org>,
        <s-vadapalli@...com>
Subject: [PATCH v4 1/5] dt-bindings: phy: cadence-torrent: Add optional input reference clock for PLL1

Add a new optional input reference clock (pll1_refclk) for PLL1.
Update bindings to support dual reference clock multilink configurations.

Signed-off-by: Swapnil Jakhade <sjakhade@...ence.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Roger Quadros <rogerq@...nel.org>
---
 .../devicetree/bindings/phy/phy-cadence-torrent.yaml   | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/phy-cadence-torrent.yaml b/Documentation/devicetree/bindings/phy/phy-cadence-torrent.yaml
index dfb31314face..3893800f81b4 100644
--- a/Documentation/devicetree/bindings/phy/phy-cadence-torrent.yaml
+++ b/Documentation/devicetree/bindings/phy/phy-cadence-torrent.yaml
@@ -35,14 +35,18 @@ properties:
     minItems: 1
     maxItems: 2
     description:
-      PHY reference clock for 1 item. Must contain an entry in clock-names.
-      Optional Parent to enable output reference clock.
+      PHY input reference clocks - refclk (for PLL0) & pll1_refclk (for PLL1).
+      pll1_refclk is optional and used for multi-protocol configurations requiring
+      separate reference clock for each protocol.
+      Same refclk is used for both PLL0 and PLL1 if no separate pll1_refclk is used.
+      Optional parent clock (phy_en_refclk) to enable a reference clock output feature
+      on some platforms to output either derived or received reference clock.
 
   clock-names:
     minItems: 1
     items:
       - const: refclk
-      - const: phy_en_refclk
+      - enum: [ pll1_refclk, phy_en_refclk ]
 
   reg:
     minItems: 1
-- 
2.25.1