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From: Kamel Bouhara <kamel.bouhara@bootlin.com>
To: William Breathitt Gray <vilhelm.gray@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Ludovic Desroches <ludovic.desroches@microchip.com>,
	linux-arm-kernel@lists.infradead.org
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	linux-input@vger.kernel.org, devicetree@vger.kernel.org,
	linux-iio@vger.kernel.org,
	Kamel Bouhara <kamel.bouhara@bootlin.com>,
	Rob Herring <robh@kernel.org>
Subject: [PATCH v6 4/5] dt-bindings: counter: microchip-tcb-capture counter
Date: Mon,  6 Jul 2020 13:43:46 +0200
Message-ID: <20200706114347.174452-5-kamel.bouhara@bootlin.com> (raw)
In-Reply-To: <20200706114347.174452-1-kamel.bouhara@bootlin.com>

Describe the devicetree binding for the Microchip TCB module.
Each counter blocks exposes three independent counters.

However, when configured in quadrature decoder, both channel <0> and <1>
are required for speed/position and rotation capture (yet only the
position is captured).

Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../soc/microchip/atmel,at91rm9200-tcb.yaml   | 32 +++++++++++++++++--
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
index d226fd7d5258..3cd0b70cd6cf 100644
--- a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
+++ b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
@@ -52,14 +52,20 @@ properties:
 
 patternProperties:
   "^timer@[0-2]$":
-    description: The timer block channels that are used as timers.
+    description: The timer block channels that are used as timers or counters.
     type: object
     properties:
       compatible:
-        const: atmel,tcb-timer
+        items:
+          - enum:
+              - atmel,tcb-timer
+              - microchip,tcb-capture
       reg:
         description:
-          List of channels to use for this particular timer.
+          List of channels to use for this particular timer. In Microchip TCB capture
+          mode channels are registered as a counter devices, for the qdec mode TCB0's
+          channel <0> and <1> are required.
+
         minItems: 1
         maxItems: 3
 
@@ -153,3 +159,23 @@ examples:
                         reg = <1>;
                 };
         };
+    /* TCB0 Capture with QDEC: */
+        timer@f800c000 {
+                compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <0xfff7c000 0x100>;
+                interrupts = <18 4>;
+                clocks = <&tcb0_clk>, <&clk32k>;
+                clock-names = "t0_clk", "slow_clk";
+
+                timer@0 {
+                        compatible = "microchip,tcb-capture";
+                        reg = <0>, <1>;
+                };
+
+                timer@2 {
+                        compatible = "atmel,tcb-timer";
+                        reg = <2>;
+                };
+        };
-- 
2.26.2


  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-06 11:43 [PATCH v6 0/5] Microchip TCB Capture driver Kamel Bouhara
2020-07-06 11:43 ` [PATCH v6 1/5] ARM: at91: add atmel tcb capabilities Kamel Bouhara
2020-07-06 11:43 ` [PATCH v6 2/5] dt-bindings: atmel-tcb: convert bindings to json-schema Kamel Bouhara
2020-07-06 11:43 ` [PATCH v6 3/5] dt-bindings: microchip: atmel,at91rm9200-tcb: add sama5d2 compatible Kamel Bouhara
2020-07-09 21:05   ` [PATCH v6 3/5] dt-bindings: microchip: atmel, at91rm9200-tcb: " Rob Herring
2020-07-06 11:43 ` Kamel Bouhara [this message]
2020-07-06 11:43 ` [PATCH v6 5/5] counter: Add microchip TCB capture counter Kamel Bouhara
2020-07-06 19:22   ` William Breathitt Gray
2020-07-07  6:48     ` Kamel Bouhara
2020-07-12 13:35 ` [PATCH v6 0/5] Microchip TCB Capture driver Jonathan Cameron
2020-07-15 21:30   ` Alexandre Belloni
2020-07-20 13:38     ` Jonathan Cameron

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