linux-kernel - [PATCH 2/8] dt-bindings: display: ti,am65x-dss: Add IO CTRL property for AM625 OLDI

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Date:   Tue, 19 Jul 2022 13:38:39 +0530
From:   Aradhya Bhatia <a-bhatia1@...com>
To:     Tomi Valkeinen <tomba@...nel.org>, Jyri Sarha <jyri.sarha@....fi>,
        Rob Herring <robh+dt@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     Darren Etheridge <detheridge@...com>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rahul T R <r-ravikumar@...com>,
        Krunal Bhargav <k-bhargav@...com>,
        Devarsh Thakkar <devarsht@...com>,
        DRI Development List <dri-devel@...ts.freedesktop.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel List <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/8] dt-bindings: display: ti,am65x-dss: Add IO CTRL property for AM625 OLDI

Add am625-io-ctrl dt property to provide access to the control MMR
registers for the OLDI TXes.

These registers are used to control the power input to the OLDI TXes as
well as to configure them in the Loopback test mode.

The MMR IO controller device has been updated since the AM65x SoC and
hence a newer property is needed to describe the one in AM625 SoC.

Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
---
 .../bindings/display/ti/ti,am65x-dss.yaml     | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
index 11d9b3821409..672765ad1f30 100644
--- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
+++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
@@ -118,12 +118,33 @@ properties:
       and OLDI_CLK_IO_CTRL registers. This property is needed for OLDI
       interface to work.
 
+  ti,am625-oldi-io-ctrl:
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+    description:
+      phandle to syscon device node mapping OLDI IO_CTRL registers, for
+      AM625 SoC. The mapped range should point to OLDI0_DAT0_IO_CTRL,
+      and map the registers up till OLDI_LB_CTRL. This property allows
+      the driver to control the power delivery to the OLDI TXes and
+      their loopback control as well.
+
   max-memory-bandwidth:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
       Input memory (from main memory to dispc) bandwidth limit in
       bytes per second
 
+if:
+  properties:
+    compatible:
+      contains:
+        const: ti,am65x-dss
+then:
+  properties:
+    ti,am625-oldi-io-ctrl: false
+else:
+  properties:
+    ti,am65x-oldi-io-ctrl: false
+
 required:
   - compatible
   - reg
-- 
2.37.0